WO2022075064A1 - Communication device - Google Patents

Communication device Download PDF

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Publication number
WO2022075064A1
WO2022075064A1 PCT/JP2021/034809 JP2021034809W WO2022075064A1 WO 2022075064 A1 WO2022075064 A1 WO 2022075064A1 JP 2021034809 W JP2021034809 W JP 2021034809W WO 2022075064 A1 WO2022075064 A1 WO 2022075064A1
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WIPO (PCT)
Prior art keywords
control unit
main control
node
communication
unit
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PCT/JP2021/034809
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French (fr)
Japanese (ja)
Inventor
直人 横山
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株式会社デンソー
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Publication of WO2022075064A1 publication Critical patent/WO2022075064A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Definitions

  • This disclosure relates to communication equipment.
  • the vehicle is equipped with a large number of ECUs (Electronic Control Units), and these ECUs electronically control various sensors and actuators installed in the vehicle while communicating. This keeps the vehicle safe.
  • ECUs Electronic Control Units
  • Patent Documents 1 to 3 Conventionally, various communication processing techniques have been proposed (see, for example, Patent Documents 1 to 3). According to the system described in Patent Document 1, when the ECUs are connected to the same communication bus, only the ECUs that need to operate are turned on, thereby reducing the current consumption during communication. There is.
  • a specific one or a plurality of ECU groups are waked up by preparing a plurality of types of pulses and patterns for wakeup. This reduces the current consumption.
  • the object of the present disclosure is to provide a communication device capable of suppressing adverse effects on the communication schedule of another node while maintaining the low power consumption state of the own node as much as possible.
  • One aspect of the present disclosure is intended for a communication device having a function of identifying whether or not communication is related to a local node based on an ID included in a frame connected to the communication bus and transmitted to the communication bus.
  • the main control unit is configured to be able to control communication with other nodes after the startup is completed.
  • the sub control unit is provided separately from the main control unit and identifies whether or not the communication includes an ID related to the own node based on the detection result of the frame sent to the communication bus, and the communication related to the own node. Maintains the main control unit in low power consumption mode when is not performed. Therefore, when communication including an ID not related to the own node is performed on the communication bus, the main control unit can be maintained in a low power consumption state.
  • the sub-control unit activates the main control unit from the low power consumption mode when the communication related to the own node is performed, and retransmits the communication related to the own node until the main control unit completes the activation. Since communication control is performed instead of the main control unit to prompt the user, even if the main control unit is running, it is possible to appropriately deal with other nodes. The other node can retransmit the communication, and the adverse effect on the communication schedule of the other node can be suppressed.
  • FIG. 1 is a functional block diagram illustrating an electrical configuration of a communication node according to the first embodiment.
  • FIG. 2 is a network connection diagram according to the first embodiment.
  • FIG. 3 is a frame format of the CXPI communication standard for explaining the first embodiment.
  • FIG. 4 is a flowchart illustrating the first embodiment.
  • FIG. 5 is a timing chart illustrating the first embodiment.
  • FIG. 6 is the first explanatory diagram of the relationship between the reception order, the frame ID, and the priority at the time of communication according to the first embodiment.
  • FIG. 1 is a functional block diagram illustrating an electrical configuration of a communication node according to the first embodiment.
  • FIG. 2 is a network connection diagram according to the first embodiment.
  • FIG. 3 is a frame format of the CXPI communication standard for explaining the first embodiment.
  • FIG. 4 is a flowchart illustrating the first embodiment.
  • FIG. 5 is a timing chart illustrating the first embodiment.
  • FIG. 6 is the first explanatory diagram of the relationship between
  • FIG. 7 is Part 2 of the explanatory diagram of the relationship between the reception order, the frame ID, and the priority at the time of communication according to the first embodiment.
  • FIG. 8 is a flowchart illustrating the second embodiment.
  • FIG. 9 is a flowchart illustrating the third embodiment.
  • FIG. 10 is a flowchart illustrating the fourth embodiment.
  • FIG. 11 is a flowchart illustrating the fifth embodiment.
  • FIG. 12 is a frame format of the LIN communication standard for explaining the sixth embodiment.
  • FIG. 13 is a flowchart illustrating the sixth embodiment.
  • FIG. 14 is a flowchart illustrating the seventh embodiment.
  • FIG. 15 is a flowchart illustrating the eighth embodiment.
  • FIG. 16 is the first explanatory diagram of the timekeeping method from the start timing to the start completion timing for the ninth embodiment.
  • FIG. 17 is Part 2 of the explanatory diagram of the timekeeping method from the start timing to the start completion timing for the ninth embodiment.
  • FIG. 18 is Part 3 of an explanatory diagram of a timekeeping method from the start timing to the start completion timing for the ninth embodiment.
  • FIG. 19 is the first explanatory diagram of the activation completion timing determination method according to the ninth embodiment.
  • FIG. 20 is Part 2 of the explanatory diagram of the activation completion timing determination method according to the ninth embodiment.
  • FIG. 21 is Part 3 of the explanatory diagram of the activation completion timing determination method according to the ninth embodiment.
  • FIG. 22 is Part 4 of the explanatory diagram of the activation completion timing determination method according to the ninth embodiment.
  • FIG. 23 is Part 1 of the flowchart illustrating the tenth embodiment.
  • FIG. 24 is Part 2 of the flowchart illustrating the tenth embodiment.
  • FIG. 25 is Part 3 of the flowchart illustrating the tenth embodiment.
  • FIGS. 1 to 7 A large number of ECUs (Electronic Control Units) are installed in the vehicle, and as shown in FIG. 2, these ECUs are equipped with communication nodes 1a to 1c which are communication devices configured to be able to communicate with each other, and communicate with each other. Communicate with each other through bus 2. Each ECU electronically controls actuators such as various switches installed in the vehicle.
  • the communication nodes 1a to 1c in the vehicle perform multiplex communication through the communication bus 2 based on a predetermined communication standard.
  • FIG. 1 is shown specifically for the communication function by the communication node 1a, only the main communication lines are shown inside the sub-control unit 20.
  • a multiplex communication method related to CXPI Lock Extension Peripheral Interface
  • CXPI Chip Extension Peripheral Interface
  • the CSMA / CD method is adopted, and the transmission / reception schedule between the master / slave communication nodes is established. Then, the frame FR corresponding to the event is communicated by using the PWM method according to the periodic request response sequence.
  • the master constantly supplies a clock to the communication bus 2 to synchronize the entire system, and the master / slave can communicate data by bit synchronization by transmitting a PWM signal in which the data is superimposed on the clock.
  • the frame FR of CXPI is classified into three types, a normal frame FR, a burst frame, and a sleep frame, and the normal frame FR and the burst frame are used for data transmission.
  • the normal frame FR can be divided into a header H and a response RE as shown in FIG.
  • An interframe space IFS is provided between the normal frame FRs to allow a space between the frames.
  • the frame slot FRS is usually configured by adding an interframe space IFS to the frame FR.
  • the header H is composed of an 8-bit protected ID, that is, a PID sandwiched between a start bit S and an end bit E.
  • the response RE is configured by sandwiching an 8-bit frame information FI, 8-bit data DATA, and 8-bit CRC data, respectively, between a start bit S and an end bit E.
  • the frame information FI is composed of 4 bits for data length, 2 bits for sleep / wakeup processing, and 2 bits for counter information indicating the continuity of frame FR.
  • the CRC code data is an error detection area by CRC.
  • an interbyte space IBS is provided between the protected ID (PID), the frame information FI, the data DATA, and the CRC code data as an interval for each byte data.
  • the protected ID may be abbreviated as an ID as necessary.
  • Each communication node 1a to 1c determines the frame FR transmitted to the communication bus 2 based on the above-mentioned protected ID (PID).
  • PID protected ID
  • the master communication node (here, 1a) transmits the header H as the transmission signal TXmas to the communication bus 2
  • the communication node (here, 1b) corresponding to the PID of the header H responds as a slave. Responds to the communication bus 2.
  • a PWM signal in which the NRZ of the UART frame is encoded is transmitted to the communication bus 2, but the PWM waveform is omitted in FIG.
  • each communication node 1a to 1c connected to the communication bus 2 is regulated so that the frame FR can be freely transmitted after confirming the idle state of the communication bus 2 in the event trigger method.
  • the communication nodes 1a to 1c that have transmitted the frame FR can transmit the frame FR again after detecting the interframe space IFS.
  • an event occurs simultaneously on the communication bus 2, that is, when a plurality of communication nodes (for example, 1b and 1c) simultaneously output a transmission signal TX to the communication bus 2, non-destructive arbitration is performed and the arbitration is performed. It is regularized so that the frame FR of the winning node (for example, 1b) is prioritized.
  • the internal modes of the communication nodes 1a to 1c will be described together with the configurations of the communication nodes 1a to 1c. Since the configurations of the communication nodes 1a to 1c have the same configuration, the configuration of the communication node 1a will be described, and the configuration description of the other communication nodes 1b to 1c will be omitted. Further, since the communication node 1a is mainly described, the communication node 1a may be described as the own node 1a, and the communication nodes 1b and 1c may be described as the other nodes 1b and 1c, if necessary.
  • the communication node 1a includes a main control unit 10, a sub control unit 20, and a transceiver 30.
  • the main control unit 10 is configured by connecting the peripheral circuit 15 to the control circuit 11.
  • the control circuit 11 is configured by, for example, a microcomputer, operates based on an input clock signal, and includes a CPU 12, a memory 13 such as a ROM, a RAM, an I / O, and the like. Further, the peripheral circuit 15 is based on an A / D conversion circuit or the like, and the control circuit 11 executes various controls using the peripheral circuit 15.
  • the main control unit 10 has a low power consumption mode in which it is in a standby state or a normal operation mode in which it is in a normal state, and is configured to mutually transition to a low power consumption mode or a normal operation mode.
  • the main control unit 10 receives the wakeup signal in the low power consumption mode, the main control unit 10 is activated in the normal operation mode and can execute normal communication control.
  • the sub control unit 20 is composed of hardware different from the main control unit 10, for example, the power supply control unit 21, the start completion determination unit 22, the transmission control unit 23, the transmission switching unit 24, and the self-ID learning.
  • Various controls are realized as a unit 25, an ID identification unit 26, a wakeup signal transmission unit 27, and a reception switching unit 28.
  • the sub-control unit 20 is configured by a custom logic circuit that starts faster than the main control unit 10 and consumes less power, and mainly executes communication control while the main control unit 10 is not started.
  • the sub-control unit 20 incorporates a memory 33 having a relatively high access speed such as a register, and a counter 34 for counting the internal clock and the bus clock from the start timing (t0 described later).
  • the transceiver 30 is composed of a transmitter 31 and a receiver 32, and transmits / receives data to / from other nodes 1b and 1c.
  • the transmitter 31 converts the transmission signal TX input from the sub-control unit 20 into a frame FR based on the communication standard and sends it to the communication bus 2.
  • the receiver 32 converts the frame FR input from the communication bus 2 into a signal and causes the receiver 32 to input the frame FR as a reception signal RX to the reception switching unit 28 of the own node 1a.
  • it may include a decoding unit by PWM modulation.
  • the main control unit 10 outputs a sleep signal to the power supply control unit 21 when it enters the standby state and shifts to the low power consumption mode. Then, the power supply control unit 21 can shift the transmitter 31 to the standby state by outputting the sleep request signal to the transmitter 31. This makes it possible to shift to the low power consumption mode.
  • the main control unit 10 cannot communicate with other nodes 1b and 1c in the low power consumption mode, but after the start-up is completed in the normal operation mode, the transmission signal TX and reception with the other nodes 1b and 1c Communication can be performed through the transceiver 30 by the signal RX.
  • the main control unit 10 starts executing the initialization process from the low power consumption mode or completes the activation in the normal operation mode, the main control unit 10 sends out various output signals such as a clock signal, a PWM signal, and a transmission signal TX.
  • the activation completion determination unit 22 of the sub-control unit 20 detects a signal output by the main control unit 10 during the initialization process from the low power consumption mode, or outputs the signal after the main control unit 10 completes the activation to the normal operation mode. By detecting the signal, the main control unit 10 determines when the activation is completed or whether the activation is completed. Further, the activation completion determination unit 22 can determine that the main control unit 10 has not been activated by detecting the sleep signal output by the main control unit 10. A desirable activation completion determination method by the activation completion determination unit 22 of the sub-control unit 20 will be described later.
  • the sub control unit 20 keeps the main control unit 10 in the standby state and maintains the low power consumption mode when the communication related to the own node 1a is not performed.
  • the sub-control unit 20 is configured to activate the main control unit 10 from the low power consumption mode to the normal operation mode when communication related to the own node 1a is performed.
  • the sub-control unit 20 communicates with other nodes 1b to 1c instead of the main control unit 10 so as to prompt the retransmission of the communication related to the own node 1a until the main control unit 10 is started up in the normal operation mode. Provided for.
  • the transmission control unit 23 executes switching control of the transmission switching unit 24 in the sleep state in which the main control unit 10 is not activated, generates a transmission signal TX instead of the main control unit 10, and transmits the transmission switching unit 24 and the transmitter.
  • the transmission signal TX is transmitted through 31. Further, when the transmission signal TX transmitted to the communication bus 2 overlaps with the other nodes 1b and 1c, the transmission control unit 23 executes arbitration for the other nodes 1b and 1c. In this case, a transmission signal TX including an ID that wins arbitration based on the ID related to the own node 1a identified by the ID or the like identification unit 26 will be generated, which will be described in detail later.
  • the self-ID learning unit 25 learns the ID of the own node 1a from the transmission signal TX and the reception signal RX, and outputs the learned ID to the ID identification unit 26.
  • the ID identification unit 26 detects the frame FR transmitted to the communication bus 2 as a reception signal RX through the receiver 32 and the reception switching unit 28, and at least the ID transmitted to the communication bus 2 instead of the main control unit 10 is on the way. It functions as an ID intermediate monitoring unit or an ID monitoring unit that monitors up to or all of them and identifies whether or not the communication includes an ID related to the own node 1a.
  • the ID and the like identification unit 26 identifies the ID and the like from the received signal RX and determines whether or not the own node 1a needs to be activated.
  • the ID identification unit 26 informs the power supply control unit 21, the activation completion determination unit 22, the transmission control unit 23, etc. to that effect, if necessary. Is output.
  • the wake-up signal transmission unit 27 can control the power supply of the reception switching unit 28 or transmit the wake-up signal to the main control unit 10 through the reception switching unit 28 in the sleep state in which the main control unit 10 is not activated.
  • the wake-up signal transmission unit 27 has a function as an activation unit for activating the main control unit 10.
  • the power supply control unit 21 has a function as a start-up unit for activating the main control unit 10 by outputting a power supply or a start-up request signal to the main control unit 10 based on an input command.
  • the wake-up signal transmission unit 27 outputs the wake-up signal to the main control unit 10 through the reception switching unit 28, the power supply control unit 21 does not necessarily have to output the start request signal to the main control unit 10.
  • the self-ID learning unit 25 receives the ID received by the receiver 32 according to whether or not the main control unit 10 transmits the response RE as the transmission signal TX with respect to the ID included in the reception signal RX received through the receiver 32. It is determined whether or not the ID is related to the own node 1a.
  • the sub control unit 20 (for example, the ID identification unit 26) has a communication line 35 for setting different from the communication lines of the transmission signal TX and the reception signal RX with the main control unit 10. It may be connected and information can be transmitted / received to / from the main control unit 10 through the setting communication line 35.
  • the sub control unit 20 directly inputs information for determining the ID of the own node 1a from the main control unit 10 and stores it in the memory 33. You can leave it.
  • the sub-control unit 20 previously transmits data such as a transmission signal TX to be responded to from the transmission control unit 23 to the other nodes 1b and 1c from the transmission control unit 23 through the setting communication line 35 until the main control unit 10 completes activation. It may be input during the activation of 10 and stored in the memory 33 in advance.
  • the memory 33 may be configured to be accessible from the outside.
  • Information for determining the ID of the own node 1a and / or data such as a transmission signal TX that responds to the other nodes 1b and 1c from the transmission control unit 23 until the main control unit 10 completes activation are externally transmitted. It may be possible to set from. Then, convenience can be improved.
  • the ID or the like identification unit 26 determines that it is necessary to start the own node 1a based on the identification result of the ID or the like identification unit 26, the ID or the like identification unit 26 outputs a power-on command to the power supply control unit 21.
  • the power control unit 21 turns on the power of the main control unit 10 and the transmitter 31, or activates the transmitter 31 from the sleep state.
  • the power supply control unit 21 does not have to execute the power supply control of the transmitter 31.
  • the power supply control unit 21 is an unnecessary functional block when the main control unit 10 is wake-up controlled by the wake-up signal transmission unit 27 and the reception switching unit 28.
  • the detailed operation of the sub-control unit 20 will be described in particular.
  • the description will be made on the premise that the own node 1a is in the sleep state and the other nodes 1b and 1c are communication devices that are normally activated.
  • the sub-control unit 20 of the own node 1a constantly determines in S1 whether or not the main control unit 10 has been activated by the activation completion determination unit 22.
  • the activation completion determination unit 22 is in a state where the activation is completed based on the output of the signal output by the main control unit 10, for example, the clock signal, the sleep signal, or the transmission signal TX.
  • the main control unit 10 has been activated by determining whether or not the predetermined fixed time has elapsed from the timing when the ID or the like identification unit 26 has determined the activation of the own node 1a. It determines whether or not it is in a state.
  • the timing when the output signal of the main control unit 10 changes is set in advance until normal communication with the other nodes 1b and 1c becomes possible.
  • the start-up completion determination unit 22 completes the start-up after a predetermined fixed time longer than the time difference has elapsed after the output signal of the main control unit 10 has changed. It may be determined that.
  • the activation completion determination unit 22 determines YES in S1 if the main control unit 10 has been activated, and communicates the transmission signal TX and the reception signal RX with the main control unit 10 through the communication bus 2 in S2. Switch. However, if the main control unit 10 has not completed the activation, the activation completion determination unit 22 determines NO in S1 and switches to communicate with the sub control unit 20 in S3.
  • the sub-control unit 20 of the own node 1a waits for the received signal RX.
  • the transceiver 30 detects the frame FR transmitted from another node (for example, 1b) by detecting the communication bus 2 by the receiver 32, it is determined in S4 that there is a signal.
  • the sub-control unit 20 receives the first N bits of the protected ID (PID) by the ID identification unit 26 in S5, and identifies the PID of the frame FR transmitted to the communication bus 2 halfway. Then, the ID identification unit 26 determines whether or not the ID should be answered in S6.
  • PID protected ID
  • the wake-up signal is input to the main control unit 10 as a reception signal RX to activate the main control unit 10.
  • the wake-up signal is a pulse signal for wake-up.
  • the sub-control unit 20 is subjected to the protected ID (PID) through the transmission switching unit 24 by the transmission control unit 23 in S8.
  • PID protected ID
  • the area where the protected ID (PID) is intentionally changed is shown in the transmission signal TX2 of the frame FR in FIG.
  • the frame ID used by the main control unit 10 of the own node 1a at the time of normal startup is 28h or 68h shown in FIG.
  • the other node 1b sends data to the communication bus 2 in the order of 00010 in LSB first to the own node 1a.
  • the sub-control unit 20 of the own node 1a determines that it is the ID of the own node 1a, and forcibly sets the 6th bit as dominant. By setting it to, you can win the mediation with the frame ID of 08h or 48h.
  • the frame ID used by the main control unit 10 of the own node 1a at the time of normal startup is 64h shown in FIG.
  • the other node 1b sends data to the communication bus 2 in the order of 001001 in LSB first to the own node 1a.
  • the sub-control unit 20 of the own node 1a determines that the ID of the own node 1a is 001001 when the 6 bits from the beginning of the protected ID (PID) are 004101 in LSB first, and forcibly sets the 7th bit. By setting the dominant "0", you can win the mediation with the frame ID of 24h.
  • the transmission control unit 23 of the sub-control unit 20 may prompt the retransmission by transmitting the data defined in advance in the response RE in S9 of FIG.
  • the pre-defined data is data defined on the protocol that the other node 1b is urging retransmission from the own node 1a, and the other node 1b receives this defined data from the own node 1a. It can be determined that resending is being prompted.
  • the transmission control unit 23 of the sub control unit 20 inputs data including a count value corresponding to the time until the main control unit 10 completes activation for the other node 1b that has received the received signal RX. It may be sent to the communication bus 2 to prompt the retransmission. As a result, the sub-control unit 20 can urge the main control unit 10 to retransmit the communication related to the own node 1a from the standby state to the completion of startup.
  • the transmission control unit 23 of the sub-control unit 20 sets the difference counter value D1 at the timing t2 in the data DATA of the frame FR and transmits the data.
  • the difference counter value D1 indicates a count value from the timing t2 until the counter 34 of the sub-control unit 20 counts the built-in clock to reach a predetermined threshold value.
  • the main control unit 10 when the main control unit 10 receives the data DATA of the response RE through the receiver 32, the data DATA is read.
  • the main control unit 10 of the other node 1b waits for a time corresponding to the difference counter value D1, and then at the timing t5, the other node 1b again sends a frame FR including the same protected ID (PID) to the communication bus 2. ..
  • PID protected ID
  • the frame FR for communicating with the other node (for example, 1c) is sent to the communication bus 2 and the timing is set.
  • Data communication can be performed with another node 1c for a predetermined time from the timing t2a after t2.
  • the other node 1b can utilize the standby time corresponding to the difference counter value D1 for other communication.
  • the usage efficiency of the communication bus 2 can be improved.
  • the other node 1c has the difference count value D2.
  • the communication with the own node 1a is retried at the timing t5.
  • the other node 1b and the other node 1c simultaneously send the frame FR to the communication bus 2, but at this time, normal arbitration is performed, and the own node 1a is the other node 1b or the other node. Can communicate with any of 1c.
  • the sub control unit 20 when the frame FR related to the own node 1a is sent to the communication bus 2 while the main control unit 10 is in the standby state, the sub control unit 20 is in the main control. While starting the unit 10 from the standby state, communication control is performed with another node 1b instead of the main control unit 10 so as to prompt the retransmission of the frame FR related to the own node 1a until the main control unit 10 completes the activation. ing. As a result, even if the frame FR is sent to the own node 1a by the time the main control unit 10 completes activation, it can be appropriately dealt with. When communication including an ID not related to the own node 1a is performed via the communication bus 2, the main control unit 10 can be maintained in the standby state.
  • the sub-control unit 20 activates the main control unit 10 from the low power consumption mode to the normal operation mode, and the main control unit 10 switches to the normal operation mode.
  • the communication is controlled instead of the main control unit 10 so as to prompt the retransmission of the communication related to the own node 1a, so that even if the main control unit 10 is running, it is with the other nodes 1b and 1c.
  • the other nodes 1b and 1c can retransmit the communication, and the adverse effect on the communication schedule and the like of the other nodes 1b and 1c can be suppressed.
  • the main control unit 10 is activated, the original data can be transmitted and received, and the influence on the communication schedule and the like to the other nodes 1b and 1c can be minimized.
  • the ID and the like identification unit 26 identifies the ID sent to the communication bus 2 instead of the main control unit 10 halfway. Then, when the ID and the like identification unit 26 determines that the ID is for the own node 1a, the transmission control unit 23 of the sub-control unit 20 changes the ID to an ID that wins arbitration and transmits the ID to the communication bus 2.
  • the transmission control unit 23 transmits data including the difference counter value D1 corresponding to the time until the activation is completed.
  • the other node 1b can retry communication with the own node 1a after waiting for the time corresponding to the difference counter value D1. Moreover, in the other node 1b, the time until the retry can be utilized for communication with another node (for example, 1c), and the usage efficiency of the communication bus 2 can be improved.
  • FIG. 8 is a flowchart shown in place of FIG.
  • the sub-control unit 20 of the own node 1a constantly determines whether or not the main control unit 10 has been activated by the activation completion determination unit 22.
  • the activation completion determination unit 22 determines YES in S1 if the main control unit 10 has been activated, and communicates the transmission signal TX and the reception signal RX with the main control unit 10 through the communication bus 2 in S2. Switch. However, if the main control unit 10 has not completed the activation, the activation completion determination unit 22 determines NO in S1 and switches to communicate with the sub control unit 20 in S3.
  • the sub-control unit 20 of the own node 1a monitors the communication bus 2 and waits for a signal.
  • the transceiver 30 detects the frame FR on the communication bus 2 from another node (for example, 1b) by the receiver 32, the sub-control unit 20 determines that there is a signal in S4.
  • the sub-control unit 20 receives all the protected IDs (PIDs) by the ID identification unit 26 in S5a, and determines whether or not the ID is an ID to be responded to in S6.
  • PIDs protected IDs
  • the sub-control unit 20 processes the processes of steps S7 and S9a in parallel on condition that there is no error in the header H in S10.
  • the sub-control unit 20 activates the main control unit 10 by causing the wake-up signal transmission unit 27 to input the wake-up signal to the main control unit 10 through the reception switching unit 28 in S7.
  • the sub-control unit 20 controls the other node 1b that received the signal in S9a of FIG.
  • the count value corresponding to the time until the start of the unit 10 is completed is transmitted to the communication bus 2 as data DATA. In this case, the same effect as that of the first embodiment is obtained.
  • the sub-control unit 20 may transmit data defined in advance so as to intentionally include an error in the error detection code by the CRC code added to the data in S9a of FIG.
  • the area where an error is intentionally caused is shown in the transmission signal TX3 in FIG.
  • the handshake between the own node 1a and the other node 1b is intentionally not established and retransmitted to the other node 1b. Can be urged.
  • the second embodiment also has the same effect as that of the first embodiment.
  • FIG. 9 is a flowchart shown in place of FIG. 4, and since the processing contents of S1 to S6 are the same as the processing contents shown in FIG. 4 described in the first embodiment, the description thereof will be omitted.
  • the sub-control unit 20 determines that the ID should be responded to in S6, the sub-control unit 20 processes steps S7 and S8a in parallel.
  • the sub-control unit 20 activates the main control unit 10 by causing the wake-up signal transmission unit 27 to input the wake-up signal to the main control unit 10 through the reception switching unit 28 in S7.
  • the sub-control unit 20 has the transmitter 31 as the error driving unit protected in S8a of FIG.
  • the communication bus 2 is driven so as to cause a bit error or the like.
  • the bit region that intentionally causes an error is shown in the transmission signal TX4 of FIG.
  • the third embodiment also has the same effect as that of the first embodiment.
  • FIG. 10 shows an explanatory diagram of the fourth embodiment.
  • FIG. 10 is a flowchart shown in place of FIG. 4, and since the processes of S3 to S9 are the same as the processes shown in FIG. 4 described in the first embodiment, the description thereof will be omitted. As shown in FIG. 10, it may be executed only when the main control unit 10 is in the standby state.
  • the sub-control unit 20 determines in S1 that the activation completion determination unit 22 has completed the activation of the main control unit 10 and then switches the main control unit 10 so that the main control unit 10 can communicate through the communication bus 2 in S2, the sub-control unit 20 will be able to perform the operation.
  • the control process may be terminated by transferring the initiative of communication control to the main control unit 10.
  • the sub-control unit 20 switches so that the main control unit 10 can communicate through the communication bus 2 in S2 after the activation completion determination unit 22 determines that the main control unit 10 has been activated in S1. ..
  • the sub control unit 20 when the power supply control unit 21 of the sub control unit 20 inputs a sleep request indicating that the main control unit 10 shifts to the sleep state in S11, the sub control unit 20 is between the other nodes 1b and 1c in S3. The communication may be switched so that the sub-control unit 20 restarts the communication control.
  • LIN Local Interconnect Network
  • FIG. 12 shows the frame format of the LIN communication standard.
  • the header H is an area that the master sends to the communication bus 2 as a transmission signal TXmas, and can be divided into a break field BF, a sync byte field SBF, and a protection field PIF from the beginning.
  • the break field BF marks the beginning of the frame FR.
  • the sync byte field SBF is based on a plurality of pulses and indicates a reference clock for error detection of each communication node.
  • the protected field PIF is composed of a 6-bit ID, a DLC, and a 2-bit parity.
  • the sync byte field SBF and the protection field PIF are fields configured by sandwiching the start bit S and the end bit E.
  • the response RE indicates an area to be transmitted to the communication bus 2 by the master or the slave specified by the ID specified by the master in the header H, and is based on 1-byte to 8-byte data DATA and checksum CS fields. It is composed.
  • the checksum CS is provided for data error detection.
  • FIG. 13 is a flowchart shown in place of FIG. Since the processing contents of S1 to S4 are the same as the processing contents shown with reference to FIG. 8 in the second embodiment, the description thereof will be omitted.
  • the sub-control unit 20 receives the first N bits of the ID included in the header H by the ID identification unit 26 in S5b, and identifies the ID transmitted to the communication bus 2 halfway instead of the main control unit 10. .. Then, the ID identification unit 26 determines whether or not the ID should be answered in S6.
  • the sub-control unit 20 processes the processes of steps S7 and S9b in parallel on condition that there is no error in the header H in S10.
  • the sub-control unit 20 activates the main control unit 10 by causing the wake-up signal transmission unit 27 to input the wake-up signal to the main control unit 10 through the reception switching unit 28 in S7.
  • the sub-control unit 20 refers to the other node 1b that has received the received signal RX in S9b of FIG. , Data including a count value corresponding to the time until the main control unit 10 completes activation is transmitted to the communication bus 2.
  • the sub-control unit 20 can urge the other node 1b to retransmit as in the first embodiment, and the other node 1b can retransmit after this time has elapsed. As a result, the same effect as that of the first embodiment is obtained.
  • the sub-control unit 20 may transmit data defined in advance so as to intentionally include an error in the error detection code of the checksum CS added to the data in S9b of FIG.
  • the area where an error is intentionally caused is shown in the transmission signal TX3 in FIG.
  • the sub-control unit 20 can urge the node 1b to retransmit as in the second embodiment. Even when applied to LIN as shown in the sixth embodiment, the same action and effect as those of the second embodiment are similarly obtained.
  • the present invention by receiving the first Nbit of the ID in S5b, it is determined whether it is an ID for the own node 1a and whether it is an ID to be responded to, but the present invention is not limited to this, and all IDs are received. After that, it may be determined whether it is an ID for the own node 1a and whether it is an ID to be responded to.
  • FIG. 14 is a flowchart shown in place of FIG. 13, and since the processing contents of S1 to S6 are the same as the processing contents shown in FIG. 13 described in the sixth embodiment, the description thereof will be omitted.
  • the sub-control unit 20 After processing S6, the sub-control unit 20 processes the processes of steps S7 and S8b in parallel regardless of the presence or absence of an error in the header H.
  • the sub control unit 20 is activated by causing the wakeup signal transmission unit 27 to input the wakeup signal to the main control unit 10 through the reception switching unit 28 in S7.
  • the sub-control unit 20 stops the ID from the transmitter 31 which is the error driving unit in S8b of FIG.
  • the communication bus 2 is driven so as to cause a bit error by driving the bit E dominantly.
  • the area where an error is intentionally caused is shown in the transmission signal TX4 of FIG.
  • the seventh embodiment also has the same effect as that of the sixth embodiment.
  • the present invention by receiving the ID at the beginning Nbit in S5b, it is determined whether it is an ID for the own node 1a and whether it is an ID to be responded to, but the present invention is not limited to this, and all IDs are not limited to this. It may be possible to identify whether it is an ID for its own node 1a and determine whether it is an ID to respond after receiving.
  • FIG. 15 is a flowchart shown in place of FIG. 14, and since the processing contents of S1 to S6 are the same as the processing contents shown in FIG. 13 described in the sixth embodiment, the description thereof will be omitted.
  • the sub-control unit 20 serves as an error driving unit in S8c of FIG. 31 drives the communication bus 2 so as to intentionally generate an error by driving it dominantly so that an ID parity error occurs in the parity bits after N + 1 bits of the ID.
  • the area where an error is intentionally caused is shown in the transmission signal TX5 in FIG.
  • the eighth embodiment also has the same effects as those of the sixth and seventh embodiments.
  • a ninth embodiment will be described with reference to FIGS. 16 to 22.
  • the sub control unit 20 transmits a wakeup signal from the wakeup signal transmission unit 27 to the main control unit 10 in, for example, S7 in FIG. 4, but at this time, the main control unit 10 transmits the wakeup signal to the CPU 12. It takes time to complete the startup to the normal state where the software can be executed and data can be sent and received.
  • the activation completion determination unit 22 of the sub control unit 20 may determine when the activation completion timing t1 of the main control unit 10 is reached or when the activation completion timing t1 is as follows.
  • the activation completion determination unit 22 determines that the ID of the frame FR transmitted to the communication bus 2 is the ID for the own node 1a, transmits a wake-up pulse signal in S7 or the like in FIG. 4, for example, and activates the main control unit 10.
  • the timing at which the start is started is set as the start start timing t0.
  • the activation completion determination unit 22 counts the internal clock built in the own node 1a starting from the activation start timing t0, and the activation completion timing is the timing when this count value reaches a predetermined threshold value. It is good to judge it as t1.
  • the bus clock transmitted from the master to the communication bus 2 is counted from the master using the CXPI communication method starting from the start timing t0, and the timing when the count value reaches a predetermined threshold value is started. It may be determined that the completion timing is t1. A clock obtained by dividing the bus clock may be used. When the time is counted using the bus clock, synchronization with other nodes 1b and 1c can be maintained, which is particularly effective.
  • the start-up completion determination unit 22 starts charging the capacitor from the current source built in the own node 1a with the start-up start timing t0 as the starting point, and the charging voltage is measured by a comparator such as a comparator. It may be detected.
  • the start-up completion determination unit 22 may determine the timing at which the charge voltage reaches a predetermined threshold voltage as the start-up completion timing t1.
  • the start-up completion determination unit 22 starts discharging from the capacitor stored in advance, and determines that the timing at which the discharged voltage reaches a predetermined threshold voltage is set as the start-up completion timing t1. Is also good. In this way, the start-up completion determination unit 22 can determine that the start-up completion timing t1 is reached when a preset time has elapsed from the start-up start timing t0.
  • the activation completion determination unit 22 determines using the signal output by the main control unit 10 in order to determine whether or not the main control unit 10 has been activated until the main control unit 10 completes activation. Is also good.
  • the output signals of the main control unit 10 used by the activation completion determination unit 22 to determine the activation completion include an internal clock output, a PWM signal output, a general-purpose I / O output port, a sleep request signal output, and a transmission signal. TX output, watchdog timer monitoring output, etc.
  • the start-up completion determination unit 22 has a voltage of the output port of the general-purpose I / O included in the main control unit 10, an output voltage of the transmission signal TX, or an output terminal voltage Vout of a sleep request signal or the like. It is preferable to detect the DC level of the above and determine the start completion timing t1 when the output terminal voltage Vout satisfies a predetermined condition. For example, when the upper limit of the DC level of the output terminal voltage Vout is ⁇ 1 and the lower limit is ⁇ 1, and any one or more of Vout ⁇ 1, ⁇ 1 ⁇ Vout, and ⁇ 1 ⁇ Vout ⁇ 1 are satisfied. It is good to judge that the start completion timing is t1.
  • the start-up completion determination unit 22 may set the timing at which the voltage of the internal clock output from the output terminal of the main control unit 10 is detected as the start-up completion timing t1. At this time, it is desirable to determine that the start-up is completed when the voltage cycle T of the internal clock satisfies a predetermined condition. For example, when the upper limit of the period T of the internal clock is ⁇ 2 and the lower limit is ⁇ 2, the activation is completed when any one or more of T ⁇ 2, ⁇ 2 ⁇ T, and ⁇ 2 ⁇ T ⁇ 2 are satisfied. It is good to determine the timing t1.
  • the activation completion determination unit 22 may set the timing at which the PWM signal voltage output from the output terminal of the main control unit 10 is detected as the activation completion timing t1. At this time, it is desirable to determine that the activation is completed when the on-period Ton and / and the off-period Toff of the PWM signal voltage satisfy a predetermined predetermined condition. For example, when the upper limit value of the on period Ton of the PWM signal voltage is ⁇ 3, the lower limit value is ⁇ 3, the upper limit value of the off period Toff is ⁇ 4, and the lower limit value is ⁇ 4, Ton ⁇ 3, ⁇ 3 ⁇ Ton, ⁇ 3 ⁇ Ton. When any one or more of ⁇ 3, Toff ⁇ 4, ⁇ 4 ⁇ Toff, ⁇ 4 ⁇ Toff ⁇ 4 is satisfied, it is preferable to determine the start completion timing t1.
  • the activation completion determination unit 22 determines whether or not the activation completion of the main control unit 10 is completed by using the pulse defined by the communication bus 2 output as the transmission signal TX from the output terminal of the main control unit 10. Is also good. For example, as shown in FIG. 22, when the activation completion determination unit 22 detects the break field BF and the sync byte field SBF defined by the communication bus 2 used in the LIN communication standard as the transmission signal TX, the main control is performed. It may be determined that the timing t1 when the start of the unit 10 is completed.
  • the time set in advance may be measured by the method of the above, and the time t0 to t1 may be assumed as a margin, and it may be determined that the main control unit 10 has been activated.
  • the tenth embodiment will be described with reference to FIGS. 23 to 25.
  • the tenth embodiment describes specific examples of the self-ID learning unit 25 and the ID identification unit 26.
  • Each ECU incorporated in the vehicle is divided into roles, and the ID to be responded to by the own node 1a is held in the non-volatile memory 13 in the main control unit 10 by the time the vehicle is incorporated. Therefore, during normal operation, the main control unit 10 can communicate with other nodes 1b and 1c using the ID.
  • the sub-control unit 20 if the ID to be responded to by the own node 1a is held in a non-volatile memory or the like, the cost of parts and the cost of management increase, so it is desirable to hold the ID in the volatile memory. In this case, the storage holding information of the memory 33 is cleared every time the power to the ECU is cut off.
  • the sub-control unit 20 cannot determine whether or not the own node 1a includes the ID to be responded to in the frame FR transmitted to the communication bus 2. .. Therefore, the self-ID learning unit 25 of the sub-control unit 20 transmits an information bit string for determining that the ID is for the own node 1a from the frame FR transmitted to the communication bus 2 during the normal operation of the main control unit 10. It is good to learn by detecting the transmission signal TX.
  • the sub control unit 20 can be realized by executing the process shown in FIG. 23.
  • FIG. 23 when the sub-control unit 20 determines that the frame FR is transmitted from the other nodes 1b and 1c to the communication bus 2, it determines that there is a signal in S20, and the self-ID learning unit 25 in S21 determines that there is a signal.
  • the PID included in the header H is received.
  • the main control unit 10 receives this frame FR and recognizes the ID included in the header H.
  • the self-ID learning unit 25 of the sub-control unit 20 determines whether or not there is a transmission signal TX transmitted from the main control unit 10 as a response RE in S23, provided that there is no error in the header H in S22. ..
  • the self-ID learning unit 25 determines that the ID should be responded to. Then, the self-ID learning unit 25 calculates the value ID_INV in which the upper to lower bits of the ID are exchanged. This is because the ID is transmitted in the LSB first in the frame FR and is dominant (0), so that the value corresponding to the priority of the ID can be calculated by exchanging the upper to lower bits.
  • the self-ID learning unit 25 determines whether or not the value is smaller than the arbitration ID stored in the memory 33 in S25, and if it is smaller, overwrites the memory 33 with the value ID_INV having a higher priority. rewrite. As a result, the self-ID learning unit 25 can learn the arbitration ID used with the other nodes 1b and 1c.
  • the self-ID learning unit 25 learns the bit string of the value ID_INV that can be used for arbitration, stores it in the memory 33, and then learns the number of bits N for identifying as the ID of the own node 1a. Specifically, as illustrated in FIG. 24, the self-ID learning unit 25 loads the stored value ID_INV in the memory 33 in S27, then calculates ID_INV-1 in S28, and calculates the value ID_INV-1 in S29. The carry parity of is calculated and set as the MSB of the value ID_INV-1.
  • the self-ID learning unit 25 determines an upper N bit that matches the value ID_INV and the value ID_INV-1 in S30, and outputs N. Then, the self-ID learning unit 25 outputs the upper N bits of the value ID_INV-1 in S31 while changing the order of the upper bits to the lower bits in S33.
  • the self-ID learning unit 25 can learn the upper N bits as a bit string for identifying the ID of the self-node 1a. Further, the self-ID learning unit 25 outputs the lower 7-N bits of the value ID_INV-1 in S32 while changing the order of the upper bits to the lower bits in S34. The lower 7-N bits become bits used at the time of arbitration after recognizing the ID of the own node 1a.
  • the self-ID learning unit 25 can learn the number of bits N for identifying as the ID of the own node 1a, and can further learn the N + 1th bit and subsequent bits that can be used for arbitration.
  • An example applied to CXPI communication is shown, but each can also be applied to LIN communication as a learning method of an ID to be responded to by the own node 1a and a bit string for error generation in the ID area.
  • the own node 1a Since the self-ID learning unit 25 for learning the ID is provided, the self-ID learning unit 25 can learn the ID to be responded to according to each communication node 1a, 1b, 1c, and the main control unit 10 is not activated. Communication control can be executed instead of the main control unit 10 in between. As a result, it is not necessary to perform the above-mentioned classification and grouping, and the setting in each ECU and the processing in the master node can be minimized.
  • FIG. 25 shows a flowchart that replaces FIG. 4, and only the characteristic parts are excerpted and shown. Since the processing contents not shown in FIG. 25 are the same as the processing contents shown in FIG. 4, the description thereof will be omitted.
  • the frame FR from the other node 1b is the communication bus 2 of the ID identification unit 26. Even if it is sent to, it is determined as NO in S6 and it is determined that the ID is not a response.
  • the self-ID learning unit 25 causes the main control unit 10 to use the received signal RX.
  • the response RE for the included ID is not output, it is determined that the own node 1a needs to be started.
  • the sub-control unit 20 transmits a wake-up pulse signal from the wake-up signal transmission unit 27 as the activation unit to the main control unit 10 in S7.
  • the main control unit 10 may be activated by the power supply control unit 21.
  • the main control unit 10 can be activated, and the self-ID learning unit 25 can learn the ID to be responded to from the response RE of the main control unit 10 of the own node 1a.
  • 1a to 1c indicate a communication node, of which 1a indicates a local node, 1b and 1c indicate another node.
  • 10 is a main control unit
  • 20 is a sub control unit
  • 21 is a power supply control unit as an activation unit
  • 23 is a transmission control unit
  • 26 is an ID identification unit, an ID intermediate monitoring unit, and an ID monitoring unit.
  • Reference numeral 27 indicates a wake-up signal transmission unit as a start-up unit
  • 31 indicates a transmitter as an error drive unit.

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Abstract

This communication device has a function of identifying whether a communication pertains to an own node on the basis of an ID included in a frame that is sent out to a communication bus upon connection to the communication bus. A main control unit (10) has a normal operation mode, and a low power consumption mode for causing an operation with power consumption lower than that in the normal operation mode, and is configured so as to be able to control communication with other nodes after completion of activation in the normal operation mode from the low power consumption mode. A sub-control unit (20) is provided separately from the main control unit, and identifies whether a frame including an ID pertaining to the own node has been sent out, on the basis of the frame detection result sent out to the communication bus. The sub-control unit maintains the main control unit in the low power consumption mode when an ID does not pertain to the own node, and, when an ID pertains to the own node, activates the main control unit from the low power consumption mode and executes, in place of the main control unit, communication control so as to prompt re-transmission of a frame pertaining to the own node until the activation of the main control unit is completed.

Description

通信装置Communication device 関連出願の相互参照Cross-reference of related applications
　本出願は、２０２０年１０月９日に出願された日本出願番号２０２０－１７１２０１号に基づくもので、ここにその記載内容を援用する。 This application is based on Japanese Application No. 2020-171201 filed on October 9, 2020, and the contents of the description are incorporated herein by reference.
　本開示は、通信装置に関する。 This disclosure relates to communication equipment.
　車両内には多数のＥＣＵ（Electronic Control Unit）が装備されており、これらのＥＣＵが通信しながら車両内に設置された様々なセンサ及びアクチュエータを電子制御している。これにより車両の安全性を保っている。 The vehicle is equipped with a large number of ECUs (Electronic Control Units), and these ECUs electronically control various sensors and actuators installed in the vehicle while communicating. This keeps the vehicle safe.
　従来より、通信処理技術は様々に提案されている（例えば、特許文献１～３参照）。特許文献１記載のシステムによれば、ＥＣＵが同一の通信バスに接続されている場合、動作を必要とするＥＣＵのみの電源を投入しており、これにより、通信時の消費電流を低減している。 Conventionally, various communication processing techniques have been proposed (see, for example, Patent Documents 1 to 3). According to the system described in Patent Document 1, when the ECUs are connected to the same communication bus, only the ECUs that need to operate are turned on, thereby reducing the current consumption during communication. There is.
　しかし、この方法では、通信装置とは別に電源を制御する必要があり、電源供給されていないＥＣＵからスイッチ入力などのイベント発生の通知ができないという問題があった。またスイッチ入力などのイベント発生を通知するためには通信装置を起動する必要があった。 However, with this method, it is necessary to control the power supply separately from the communication device, and there is a problem that the ECU that is not supplied with power cannot notify the occurrence of an event such as a switch input. In addition, it was necessary to activate the communication device in order to notify the occurrence of an event such as switch input.
　また特許文献２、３記載のシステムによれば、ウェイクアップ用のパルスやパターンを複数種類用意することで、特定の１又は複数のＥＣＵ群をウェイクアップさせている。これにより消費電流を低減している。 Further, according to the systems described in Patent Documents 2 and 3, a specific one or a plurality of ECU groups are waked up by preparing a plurality of types of pulses and patterns for wakeup. This reduces the current consumption.
　しかし、この方法では、ウェイクアップ用のパルス幅やパターンをＥＣＵ群毎に予め定義する必要があり、クロックの精度等によりグループ分けの数が制限される。また、一部のＥＣＵがウェイクアップしている状態から、全てのＥＣＵをウェイクアップさせる場合、一旦、他の通信を止め、ウェイクアップパルス等を送信する必要がある。このため、各通信ノードの通信スケジュール等に悪影響を引き起こしてしまう。 However, in this method, it is necessary to predefine the pulse width and pattern for wakeup for each ECU group, and the number of grouping is limited by the accuracy of the clock and the like. Further, when wake-up of all ECUs from a state where some ECUs are wake-up, it is necessary to temporarily stop other communication and transmit a wake-up pulse or the like. Therefore, the communication schedule of each communication node is adversely affected.
特開２０１５－０８１０２１号公報JP-A-2015-081021 特表２００５－５２９５１７号公報Special Table 2005-528517 特開２０１３－０６２７２５号公報Japanese Unexamined Patent Publication No. 2013-06725
　本開示は、自ノードの低消費電力状態を極力維持しつつ、他ノードの通信スケジュール等への悪影響を抑制できるようにした通信装置を提供することを目的とする。 The object of the present disclosure is to provide a communication device capable of suppressing adverse effects on the communication schedule of another node while maintaining the low power consumption state of the own node as much as possible.
　本開示の一態様は、通信バスに接続され通信バスに送出されるフレームに含まれるＩＤに基づいて自ノードに関係する通信か否かを識別する機能を備える通信装置を対象としている。主制御部は、起動完了した後に他ノードとの間で通信制御可能に構成されている。 One aspect of the present disclosure is intended for a communication device having a function of identifying whether or not communication is related to a local node based on an ID included in a frame connected to the communication bus and transmitted to the communication bus. The main control unit is configured to be able to control communication with other nodes after the startup is completed.
　副制御部は、主制御部とは別に備えられると共に通信バスに送出されるフレームの検出結果に基づいて自ノードに関係するＩＤを含む通信か否か識別しており、自ノードに関係する通信が行われていない場合に主制御部を低消費電力モードで維持する。このため、通信バス上で自ノードに関係しないＩＤを含む通信が行われている場合には、主制御部を低消費電力状態に維持できる。 The sub control unit is provided separately from the main control unit and identifies whether or not the communication includes an ID related to the own node based on the detection result of the frame sent to the communication bus, and the communication related to the own node. Maintains the main control unit in low power consumption mode when is not performed. Therefore, when communication including an ID not related to the own node is performed on the communication bus, the main control unit can be maintained in a low power consumption state.
　副制御部は、自ノードに関係する通信が行われた場合に主制御部を低消費電力モードから起動させると共に、主制御部が起動完了するまでの間、自ノードに関係する通信の再送を促すように主制御部の代わりに通信制御するため、主制御部が起動中であっても他ノードとの間で適切に対応できる。他ノードは通信の再送を行うことができ、他ノードの通信スケジュール等への悪影響を抑制できる。 The sub-control unit activates the main control unit from the low power consumption mode when the communication related to the own node is performed, and retransmits the communication related to the own node until the main control unit completes the activation. Since communication control is performed instead of the main control unit to prompt the user, even if the main control unit is running, it is possible to appropriately deal with other nodes. The other node can retransmit the communication, and the adverse effect on the communication schedule of the other node can be suppressed.
　本開示についての上記目的およびその他の目的、特徴や利点は、添付の図面を参照しながら下記の詳細な記述により、より明確になる。その図面は、
図１は、第１実施形態に係る通信ノードの電気的構成を説明する機能ブロック図であり、 図２は、第１実施形態に係るネットワーク接続図であり、 図３は、第１実施形態を説明するＣＸＰＩ通信規格のフレームフォーマットであり、 図４は、第１実施形態を説明するフローチャートであり、 図５は、第１実施形態を説明するタイミングチャートであり、 図６は、第１実施形態に係る通信時の受信順、フレームＩＤ、優先順位の関係性の説明図のその１であり、 図７は、第１実施形態に係る通信時の受信順、フレームＩＤ、優先順位の関係性の説明図のその２であり、 図８は、第２実施形態を説明するフローチャートであり、 図９は、第３実施形態を説明するフローチャートであり、 図１０は、第４実施形態を説明するフローチャートであり、 図１１は、第５実施形態を説明するフローチャートであり、 図１２は、第６実施形態を説明するＬＩＮ通信規格のフレームフォーマットであり、 図１３は、第６実施形態を説明するフローチャートであり、 図１４は、第７実施形態を説明するフローチャートであり、 図１５は、第８実施形態を説明するフローチャートであり、 図１６は、第９実施形態について起動開始タイミングから起動完了タイミングまでの計時方法の説明図のその１であり、 図１７は、第９実施形態について起動開始タイミングから起動完了タイミングまでの計時方法の説明図のその２であり、 図１８は、第９実施形態について起動開始タイミングから起動完了タイミングまでの計時方法の説明図のその３であり、 図１９は、第９実施形態に係る起動完了タイミングの判定方法の説明図のその１であり、 図２０は、第９実施形態に係る起動完了タイミングの判定方法の説明図のその２であり、 図２１は、第９実施形態に係る起動完了タイミングの判定方法の説明図のその３であり、 図２２は、第９実施形態に係る起動完了タイミングの判定方法の説明図のその４であり、 図２３は、第１０実施形態を説明するフローチャートのその１であり、 図２４は、第１０実施形態を説明するフローチャートのその２であり、 図２５は、第１０実施形態を説明するフローチャートのその３である。 The above objectives and other objectives, features and advantages of the present disclosure will be further clarified by the following detailed description with reference to the accompanying drawings. The drawing is
FIG. 1 is a functional block diagram illustrating an electrical configuration of a communication node according to the first embodiment. FIG. 2 is a network connection diagram according to the first embodiment. FIG. 3 is a frame format of the CXPI communication standard for explaining the first embodiment. FIG. 4 is a flowchart illustrating the first embodiment. FIG. 5 is a timing chart illustrating the first embodiment. FIG. 6 is the first explanatory diagram of the relationship between the reception order, the frame ID, and the priority at the time of communication according to the first embodiment. FIG. 7 is Part 2 of the explanatory diagram of the relationship between the reception order, the frame ID, and the priority at the time of communication according to the first embodiment. FIG. 8 is a flowchart illustrating the second embodiment. FIG. 9 is a flowchart illustrating the third embodiment. FIG. 10 is a flowchart illustrating the fourth embodiment. FIG. 11 is a flowchart illustrating the fifth embodiment. FIG. 12 is a frame format of the LIN communication standard for explaining the sixth embodiment. FIG. 13 is a flowchart illustrating the sixth embodiment. FIG. 14 is a flowchart illustrating the seventh embodiment. FIG. 15 is a flowchart illustrating the eighth embodiment. FIG. 16 is the first explanatory diagram of the timekeeping method from the start timing to the start completion timing for the ninth embodiment. FIG. 17 is Part 2 of the explanatory diagram of the timekeeping method from the start timing to the start completion timing for the ninth embodiment. FIG. 18 is Part 3 of an explanatory diagram of a timekeeping method from the start timing to the start completion timing for the ninth embodiment. FIG. 19 is the first explanatory diagram of the activation completion timing determination method according to the ninth embodiment. FIG. 20 is Part 2 of the explanatory diagram of the activation completion timing determination method according to the ninth embodiment. FIG. 21 is Part 3 of the explanatory diagram of the activation completion timing determination method according to the ninth embodiment. FIG. 22 is Part 4 of the explanatory diagram of the activation completion timing determination method according to the ninth embodiment. FIG. 23 is Part 1 of the flowchart illustrating the tenth embodiment. FIG. 24 is Part 2 of the flowchart illustrating the tenth embodiment. FIG. 25 is Part 3 of the flowchart illustrating the tenth embodiment.
　以下、本開示の幾つかの実施形態について図面を参照しながら説明する。以下に説明する各実施形態において同一又は類似の動作を行う構成、処理ステップについては、同一又は類似の符号を付し、必要に応じて説明を省略する。 Hereinafter, some embodiments of the present disclosure will be described with reference to the drawings. The configurations and processing steps that perform the same or similar operations in each of the embodiments described below are designated by the same or similar reference numerals, and the description thereof will be omitted as necessary.
　（第１実施形態）
　以下、第１実施形態について図１から図７を参照して説明する。車両内には多数のＥＣＵ（Electronic Control Unit）が装備されており、図２に示すように、これらのＥＣＵがそれぞれ互いに通信可能に構成される通信装置となる通信ノード１ａ～１ｃを備え、通信バス２を通じて相互に通信する。そして各ＥＣＵは、車両内に設置された様々なスイッチ等のアクチュエータを電子制御している。車両内の通信ノード１ａ～１ｃは、所定の通信規格に基づいて通信バス２を通じて多重通信している。図１には、特に通信ノード１ａによる通信機能に特化して図示しているが、副制御部２０の内部では主要な通信線だけを図示している。 (First Embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 7. A large number of ECUs (Electronic Control Units) are installed in the vehicle, and as shown in FIG. 2, these ECUs are equipped with communication nodes 1a to 1c which are communication devices configured to be able to communicate with each other, and communicate with each other. Communicate with each other through bus 2. Each ECU electronically controls actuators such as various switches installed in the vehicle. The communication nodes 1a to 1c in the vehicle perform multiplex communication through the communication bus 2 based on a predetermined communication standard. Although FIG. 1 is shown specifically for the communication function by the communication node 1a, only the main communication lines are shown inside the sub-control unit 20.
　本実施形態では、ＣＸＰＩ（Clock Extension Peripheral Interface）に係る多重通信方式を適用して説明する。ＣＸＰＩ通信方式では、ＣＳＭＡ／ＣＤ方式を採用すると共に、マスタ／スレーブとなる各通信ノードの間の送受信スケジュールを確立する。そして、定期的な要求応答シーケンスに沿ってイベントに対応したフレームＦＲをＰＷＭ方式を用いて通信する。 In this embodiment, a multiplex communication method related to CXPI (Clock Extension Peripheral Interface) will be applied and described. In the CXPI communication method, the CSMA / CD method is adopted, and the transmission / reception schedule between the master / slave communication nodes is established. Then, the frame FR corresponding to the event is communicated by using the PWM method according to the periodic request response sequence.
　ＣＸＰＩ通信では、通信バス２にマスタが常にクロックを供給することでシステム全体を同期させ、マスタ／スレーブはデータをクロックに重畳させたＰＷＭ信号を送信することでビット同期してデータを通信できる。 In CXPI communication, the master constantly supplies a clock to the communication bus 2 to synchronize the entire system, and the master / slave can communicate data by bit synchronization by transmitting a PWM signal in which the data is superimposed on the clock.
　ＣＸＰＩのフレームＦＲは、通常のフレームＦＲ、バーストフレーム、スリープフレームの３種類に区分され、データ送信には通常フレームＦＲ及びバーストフレームが使用される。通常フレームＦＲは、図３に示すようにヘッダＨ及びレスポンスＲＥに区分できる。 The frame FR of CXPI is classified into three types, a normal frame FR, a burst frame, and a sleep frame, and the normal frame FR and the burst frame are used for data transmission. The normal frame FR can be divided into a header H and a response RE as shown in FIG.
　通常フレームＦＲの間には、当該フレーム間の間隔を空けるためのインターフレームスペースＩＦＳが設けられる。フレームスロットＦＲＳは、通常フレームＦＲにインターフレームスペースＩＦＳを加えて構成される。 An interframe space IFS is provided between the normal frame FRs to allow a space between the frames. The frame slot FRS is usually configured by adding an interframe space IFS to the frame FR.
　ヘッダＨは、８ビットのプロテクティッドＩＤ、つまりＰＩＤをスタートビットＳ及びエンドビットＥで挟んで構成される。レスポンスＲＥは、８ビットのフレーム情報ＦＩ、８ビット分のデータＤＡＴＡ、８ビットのＣＲＣデータ、をそれぞれスタートビットＳ及びエンドビットＥで挟んで構成される。 The header H is composed of an 8-bit protected ID, that is, a PID sandwiched between a start bit S and an end bit E. The response RE is configured by sandwiching an 8-bit frame information FI, 8-bit data DATA, and 8-bit CRC data, respectively, between a start bit S and an end bit E.
　フレーム情報ＦＩは、データ長４ビット、スリープ／ウェイクアップ処理に使用する２ビット、フレームＦＲの連続性を表すカウンタ情報２ビットにより構成される。ＣＲＣ符号データは、ＣＲＣによる誤り検出領域である。また、プロテクティッドＩＤ（ＰＩＤ）、フレーム情報ＦＩ、データＤＡＴＡ、ＣＲＣ符号データの間には、各バイトデータごとの間隔としてインターバイトスペースＩＢＳが設けられている。以下では、プロテクティッドＩＤのことを必要に応じてＩＤと略して説明することがある。 The frame information FI is composed of 4 bits for data length, 2 bits for sleep / wakeup processing, and 2 bits for counter information indicating the continuity of frame FR. The CRC code data is an error detection area by CRC. Further, an interbyte space IBS is provided between the protected ID (PID), the frame information FI, the data DATA, and the CRC code data as an interval for each byte data. In the following, the protected ID may be abbreviated as an ID as necessary.
　各通信ノード１ａ～１ｃは、前述のプロテクティッドＩＤ（ＰＩＤ）に基づいて通信バス２に送出されるフレームＦＲを判別する。マスタとなる通信ノード（ここでは１ａとする）が、ヘッダＨを送信信号ＴＸmasとして通信バス２に送信すると、当該ヘッダＨのＰＩＤに対応した通信ノード（ここでは１ｂとする）がスレーブとしてレスポンスＲＥを通信バス２に応答する。これによりマスタスレーブ間で通信が行われる。なお、通信バス２には、ＵＡＲＴフレームのＮＲＺを符号化したＰＷＭ信号が送信されるが、図２にはＰＷＭ波形は省略している。 Each communication node 1a to 1c determines the frame FR transmitted to the communication bus 2 based on the above-mentioned protected ID (PID). When the master communication node (here, 1a) transmits the header H as the transmission signal TXmas to the communication bus 2, the communication node (here, 1b) corresponding to the PID of the header H responds as a slave. Responds to the communication bus 2. As a result, communication is performed between the master and slave. A PWM signal in which the NRZ of the UART frame is encoded is transmitted to the communication bus 2, but the PWM waveform is omitted in FIG.
　また、通信バス２に接続された各通信ノード１ａ～１ｃは、イベントトリガ方式において、通信バス２のアイドル状態を確認した上で自由にフレームＦＲを送信可能に規則化されている。フレームＦＲを送信した通信ノード１ａ～１ｃは、インターフレームスペースＩＦＳを検出した後に再度フレームＦＲを送信可能になっている。 Further, each communication node 1a to 1c connected to the communication bus 2 is regulated so that the frame FR can be freely transmitted after confirming the idle state of the communication bus 2 in the event trigger method. The communication nodes 1a to 1c that have transmitted the frame FR can transmit the frame FR again after detecting the interframe space IFS.
　また、イベントが通信バス２に同時に発生した場合、すなわち、同時に複数の通信ノード（例えば１ｂ、１ｃ）が送信信号ＴＸを通信バス２に出力した場合、非破壊型の調停を実施し、調停に勝利したノード（例えば１ｂ）のフレームＦＲが優先されるように規則化されている。 Further, when an event occurs simultaneously on the communication bus 2, that is, when a plurality of communication nodes (for example, 1b and 1c) simultaneously output a transmission signal TX to the communication bus 2, non-destructive arbitration is performed and the arbitration is performed. It is regularized so that the frame FR of the winning node (for example, 1b) is prioritized.
　以下、通信ノード１ａ～１ｃの構成と共に、各通信ノード１ａ～１ｃの内部モードについて説明する。各通信ノード１ａ～１ｃの構成は同一構成を備えているため、通信ノード１ａの構成を説明し、その他の通信ノード１ｂ～１ｃの構成説明を省略する。また、通信ノード１ａを主体として説明するため、必要に応じて、通信ノード１ａを自ノード１ａ、通信ノード１ｂ、１ｃを他ノード１ｂ、１ｃとして説明することがある。 Hereinafter, the internal modes of the communication nodes 1a to 1c will be described together with the configurations of the communication nodes 1a to 1c. Since the configurations of the communication nodes 1a to 1c have the same configuration, the configuration of the communication node 1a will be described, and the configuration description of the other communication nodes 1b to 1c will be omitted. Further, since the communication node 1a is mainly described, the communication node 1a may be described as the own node 1a, and the communication nodes 1b and 1c may be described as the other nodes 1b and 1c, if necessary.
　通信ノード１ａには、主制御部１０、副制御部２０、及びトランシーバ３０が構成されている。主制御部１０は、制御回路１１に周辺回路１５を接続して構成される。制御回路１１は、例えばマイクロコンピュータにより構成され、入力されるクロック信号に基づいて動作し、ＣＰＵ１２、ＲＯＭ、ＲＡＭなどのメモリ１３、Ｉ／Ｏなどを具備している。また周辺回路１５は、Ａ／Ｄ変換回路などによるもので、制御回路１１が、周辺回路１５を用いて各種制御を実行する。 The communication node 1a includes a main control unit 10, a sub control unit 20, and a transceiver 30. The main control unit 10 is configured by connecting the peripheral circuit 15 to the control circuit 11. The control circuit 11 is configured by, for example, a microcomputer, operates based on an input clock signal, and includes a CPU 12, a memory 13 such as a ROM, a RAM, an I / O, and the like. Further, the peripheral circuit 15 is based on an A / D conversion circuit or the like, and the control circuit 11 executes various controls using the peripheral circuit 15.
　主制御部１０は、スタンバイ状態となる低消費電力モード、又は、通常状態となる通常動作モードを備えており、低消費電力モード又は通常動作モードに相互遷移するように構成される。主制御部１０は、低消費電力モードにおいてウェイクアップ信号を受け付けると通常動作モードに起動し、通常の通信制御を実行できる。 The main control unit 10 has a low power consumption mode in which it is in a standby state or a normal operation mode in which it is in a normal state, and is configured to mutually transition to a low power consumption mode or a normal operation mode. When the main control unit 10 receives the wakeup signal in the low power consumption mode, the main control unit 10 is activated in the normal operation mode and can execute normal communication control.
　他方、副制御部２０は、例えば主制御部１０とは別のハードウェアにより構成されるもので、電源制御部２１、起動完了判定部２２、送信制御部２３、送信切替部２４、自己ＩＤ学習部２５、ＩＤ等識別部２６、ウェイクアップ信号送出部２７、及び受信切替部２８としての各種制御を実現する。副制御部２０は、主制御部１０よりも起動が速く低消費電力なカスタムロジック回路により構成され、主に主制御部１０が未起動中の通信制御を実行する。また副制御部２０には、レジスタなどアクセス速度の比較的速いメモリ３３、及び、起動開始タイミング（後述のｔ０）から内部クロックやバスクロックをカウントするためのカウンタ３４が組み込まれている。 On the other hand, the sub control unit 20 is composed of hardware different from the main control unit 10, for example, the power supply control unit 21, the start completion determination unit 22, the transmission control unit 23, the transmission switching unit 24, and the self-ID learning. Various controls are realized as a unit 25, an ID identification unit 26, a wakeup signal transmission unit 27, and a reception switching unit 28. The sub-control unit 20 is configured by a custom logic circuit that starts faster than the main control unit 10 and consumes less power, and mainly executes communication control while the main control unit 10 is not started. Further, the sub-control unit 20 incorporates a memory 33 having a relatively high access speed such as a register, and a counter 34 for counting the internal clock and the bus clock from the start timing (t0 described later).
　トランシーバ３０は、トランスミッタ３１及びレシーバ３２により構成され、他ノード１ｂ、１ｃとの間でデータを送受信する。トランスミッタ３１は、副制御部２０から入力される送信信号ＴＸを通信規格に基づくフレームＦＲに変換し通信バス２に送出する。レシーバ３２は、通信バス２から入力されるフレームＦＲを信号変換し受信信号ＲＸとして自ノード１ａの受信切替部２８に入力させる。なお、ＰＷＭ変調を使用する通信の場合は、ＰＷＭ変調による復号化部を含むものであっても良い。 The transceiver 30 is composed of a transmitter 31 and a receiver 32, and transmits / receives data to / from other nodes 1b and 1c. The transmitter 31 converts the transmission signal TX input from the sub-control unit 20 into a frame FR based on the communication standard and sends it to the communication bus 2. The receiver 32 converts the frame FR input from the communication bus 2 into a signal and causes the receiver 32 to input the frame FR as a reception signal RX to the reception switching unit 28 of the own node 1a. In the case of communication using PWM modulation, it may include a decoding unit by PWM modulation.
　主制御部１０は、自身がスタンバイ状態となり低消費電力モードに移行するときにはスリープ信号を電源制御部２１に出力する。すると電源制御部２１は、トランスミッタ３１にスリープ要求信号を出力することで、トランスミッタ３１をスタンバイ状態に移行させることができる。これにより低消費電力モードに移行できる。 The main control unit 10 outputs a sleep signal to the power supply control unit 21 when it enters the standby state and shifts to the low power consumption mode. Then, the power supply control unit 21 can shift the transmitter 31 to the standby state by outputting the sleep request signal to the transmitter 31. This makes it possible to shift to the low power consumption mode.
　主制御部１０は、低消費電力モードでは他ノード１ｂ、１ｃとの間で通信不能であるが、通常動作モードに起動完了した後には、他ノード１ｂ、１ｃとの間で送信信号ＴＸ及び受信信号ＲＸによりトランシーバ３０を通じて通信できる。主制御部１０は、低消費電力モードから初期化処理を実行し始めたり通常動作モードに起動完了すると、クロック信号、ＰＷＭ信号、送信信号ＴＸなどの各種の出力信号を送出する。 The main control unit 10 cannot communicate with other nodes 1b and 1c in the low power consumption mode, but after the start-up is completed in the normal operation mode, the transmission signal TX and reception with the other nodes 1b and 1c Communication can be performed through the transceiver 30 by the signal RX. When the main control unit 10 starts executing the initialization process from the low power consumption mode or completes the activation in the normal operation mode, the main control unit 10 sends out various output signals such as a clock signal, a PWM signal, and a transmission signal TX.
　副制御部２０の起動完了判定部２２は、主制御部１０が低消費電力モードから初期化処理中に出力する信号を検出したり、主制御部１０が通常動作モードに起動完了した後に出力する信号を検出することで、主制御部１０がいつ起動完了するか又は起動完了したか否かを判定する。また、起動完了判定部２２は、主制御部１０が出力するスリープ信号を検出することで主制御部１０が起動していないと判定できる。副制御部２０の起動完了判定部２２による望ましい起動完了判定方法は後述する。 The activation completion determination unit 22 of the sub-control unit 20 detects a signal output by the main control unit 10 during the initialization process from the low power consumption mode, or outputs the signal after the main control unit 10 completes the activation to the normal operation mode. By detecting the signal, the main control unit 10 determines when the activation is completed or whether the activation is completed. Further, the activation completion determination unit 22 can determine that the main control unit 10 has not been activated by detecting the sleep signal output by the main control unit 10. A desirable activation completion determination method by the activation completion determination unit 22 of the sub-control unit 20 will be described later.
　副制御部２０は、自ノード１ａに関係する通信を行っていない場合、主制御部１０をスタンバイ状態として低消費電力モードに維持させる。そして副制御部２０は、自ノード１ａに関係する通信が行われた場合に主制御部１０を低消費電力モードから通常動作モードに起動するように構成される。副制御部２０は、主制御部１０が通常動作モードに起動完了するまでの間、自ノード１ａに関係する通信の再送を促すように主制御部１０の代わりに他ノード１ｂ～１ｃと通信するために設けられる。 The sub control unit 20 keeps the main control unit 10 in the standby state and maintains the low power consumption mode when the communication related to the own node 1a is not performed. The sub-control unit 20 is configured to activate the main control unit 10 from the low power consumption mode to the normal operation mode when communication related to the own node 1a is performed. The sub-control unit 20 communicates with other nodes 1b to 1c instead of the main control unit 10 so as to prompt the retransmission of the communication related to the own node 1a until the main control unit 10 is started up in the normal operation mode. Provided for.
　送信制御部２３は、主制御部１０が起動していないスリープ状態において、送信切替部２４の切替制御を実行し、主制御部１０の代わりに送信信号ＴＸを生成し、送信切替部２４及びトランスミッタ３１を通じて送信信号ＴＸを送信する。また、送信制御部２３は、通信バス２に送出された送信信号ＴＸが他ノード１ｂ、１ｃと重なった場合、他ノード１ｂ、１ｃに対し調停を実行する。この場合、ＩＤ等識別部２６が識別した自ノード１ａに関するＩＤに基づいて調停勝ちするＩＤを含む送信信号ＴＸを生成することになるが詳細は後述する。 The transmission control unit 23 executes switching control of the transmission switching unit 24 in the sleep state in which the main control unit 10 is not activated, generates a transmission signal TX instead of the main control unit 10, and transmits the transmission switching unit 24 and the transmitter. The transmission signal TX is transmitted through 31. Further, when the transmission signal TX transmitted to the communication bus 2 overlaps with the other nodes 1b and 1c, the transmission control unit 23 executes arbitration for the other nodes 1b and 1c. In this case, a transmission signal TX including an ID that wins arbitration based on the ID related to the own node 1a identified by the ID or the like identification unit 26 will be generated, which will be described in detail later.
　自己ＩＤ学習部２５は、送信信号ＴＸ及び受信信号ＲＸから自ノード１ａのＩＤを学習し、学習したＩＤをＩＤ等識別部２６に出力する。自己ＩＤ学習部２５による自己ＩＤ学習処理の具体例は後述の第１０実施形態にて詳細説明する。ＩＤ等識別部２６は、通信バス２に送出されるフレームＦＲをレシーバ３２及び受信切替部２８を通じて受信信号ＲＸとして検出し、主制御部１０の代わりに通信バス２に送出されるＩＤを少なくとも途中まで又は全て監視し、自ノード１ａに関係するＩＤを含む通信か否かを識別するＩＤ途中監視部又はＩＤ監視部として機能する。 The self-ID learning unit 25 learns the ID of the own node 1a from the transmission signal TX and the reception signal RX, and outputs the learned ID to the ID identification unit 26. A specific example of the self-ID learning process by the self-ID learning unit 25 will be described in detail in the tenth embodiment described later. The ID identification unit 26 detects the frame FR transmitted to the communication bus 2 as a reception signal RX through the receiver 32 and the reception switching unit 28, and at least the ID transmitted to the communication bus 2 instead of the main control unit 10 is on the way. It functions as an ID intermediate monitoring unit or an ID monitoring unit that monitors up to or all of them and identifies whether or not the communication includes an ID related to the own node 1a.
　ＩＤ等識別部２６は、受信信号ＲＸからＩＤ等を識別し自ノード１ａの起動要否の判定を行う。ＩＤ等識別部２６は、自ノード１ａに関係するＩＤを含む通信であったときには、必要に応じて電源制御部２１、起動完了判定部２２、及び送信制御部２３等にその旨を示す制御信号を出力する。ウェイクアップ信号送出部２７は、主制御部１０が起動していないスリープ状態において、受信切替部２８を電源制御したり、ウェイクアップ信号を受信切替部２８を通じて主制御部１０に送信したりできる。ウェイクアップ信号送出部２７は、主制御部１０を起動させる起動部としての機能を備える。 The ID and the like identification unit 26 identifies the ID and the like from the received signal RX and determines whether or not the own node 1a needs to be activated. When the communication includes the ID related to the own node 1a, the ID identification unit 26 informs the power supply control unit 21, the activation completion determination unit 22, the transmission control unit 23, etc. to that effect, if necessary. Is output. The wake-up signal transmission unit 27 can control the power supply of the reception switching unit 28 or transmit the wake-up signal to the main control unit 10 through the reception switching unit 28 in the sleep state in which the main control unit 10 is not activated. The wake-up signal transmission unit 27 has a function as an activation unit for activating the main control unit 10.
　また電源制御部２１は、入力される指令に基づいて電源もしくは起動要求信号を主制御部１０に出力することで主制御部１０を起動させる起動部としての機能を備える。なおウェイクアップ信号送出部２７が、ウェイクアップ信号を受信切替部２８を通じて主制御部１０に出力する場合、電源制御部２１が主制御部１０に起動要求信号を必ずしも出力しなくても良い。 Further, the power supply control unit 21 has a function as a start-up unit for activating the main control unit 10 by outputting a power supply or a start-up request signal to the main control unit 10 based on an input command. When the wake-up signal transmission unit 27 outputs the wake-up signal to the main control unit 10 through the reception switching unit 28, the power supply control unit 21 does not necessarily have to output the start request signal to the main control unit 10.
　自己ＩＤ学習部２５は、レシーバ３２を通じて受信した受信信号ＲＸに含まれるＩＤに対して、主制御部１０がレスポンスＲＥを送信信号ＴＸとして送信したか否かに応じてレシーバ３２で受信したＩＤが自ノード１ａに関するＩＤであるか否かの判定を行う。 The self-ID learning unit 25 receives the ID received by the receiver 32 according to whether or not the main control unit 10 transmits the response RE as the transmission signal TX with respect to the ID included in the reception signal RX received through the receiver 32. It is determined whether or not the ID is related to the own node 1a.
　副制御部２０（例えばＩＤ等識別部２６）は、図１に示すように、主制御部１０との間で送信信号ＴＸ及び受信信号ＲＸの通信線とは異なる別の設定用通信線３５を接続し、主制御部１０との間で設定用通信線３５を通じて情報を送受信可能にしても良い。副制御部２０及び主制御部１０が双方向通信することで、副制御部２０が、主制御部１０から自ノード１ａのＩＤと判断するための情報を直接入力してメモリ３３に記憶しておいても良い。 As shown in FIG. 1, the sub control unit 20 (for example, the ID identification unit 26) has a communication line 35 for setting different from the communication lines of the transmission signal TX and the reception signal RX with the main control unit 10. It may be connected and information can be transmitted / received to / from the main control unit 10 through the setting communication line 35. By bidirectional communication between the sub control unit 20 and the main control unit 10, the sub control unit 20 directly inputs information for determining the ID of the own node 1a from the main control unit 10 and stores it in the memory 33. You can leave it.
　また副制御部２０は、主制御部１０が起動完了までの間に送信制御部２３から他ノード１ｂ、１ｃに応答すべき送信信号ＴＸ等のデータを、設定用通信線３５を通じて予め主制御部１０の起動中に入力しておき、メモリ３３に予め記憶させておいても良い。 Further, the sub-control unit 20 previously transmits data such as a transmission signal TX to be responded to from the transmission control unit 23 to the other nodes 1b and 1c from the transmission control unit 23 through the setting communication line 35 until the main control unit 10 completes activation. It may be input during the activation of 10 and stored in the memory 33 in advance.
　またメモリ３３を外部からアクセス可能に構成しても良い。自ノード１ａのＩＤと判断するための情報、又は／及び、主制御部１０が起動完了するまでの間に送信制御部２３から他ノード１ｂ、１ｃに応答する送信信号ＴＸ等のデータを、外部から設定可能にしても良い。すると、利便性を向上できる。 Further, the memory 33 may be configured to be accessible from the outside. Information for determining the ID of the own node 1a and / or data such as a transmission signal TX that responds to the other nodes 1b and 1c from the transmission control unit 23 until the main control unit 10 completes activation are externally transmitted. It may be possible to set from. Then, convenience can be improved.
　またＩＤ等識別部２６は、ＩＤ等識別部２６の識別結果に基づいて自ノード１ａの起動を必要と判定した場合、電源制御部２１に電源投入指令を出力する。電源制御部２１は、ＩＤ等識別部２６から電源投入指令を入力すると、主制御部１０及びトランスミッタ３１の電源を投入したり、又は、トランスミッタ３１をスリープ状態から起動させる。 Further, when the ID or the like identification unit 26 determines that it is necessary to start the own node 1a based on the identification result of the ID or the like identification unit 26, the ID or the like identification unit 26 outputs a power-on command to the power supply control unit 21. When the power-on command is input from the ID or the like identification unit 26, the power control unit 21 turns on the power of the main control unit 10 and the transmitter 31, or activates the transmitter 31 from the sleep state.
　なお、トランスミッタ３１の消費電流を低減させる必要がない場合には、電源制御部２１は、トランスミッタ３１の電源制御を実行しなくても良い。電源制御部２１は、ウェイクアップ信号送出部２７や受信切替部２８により主制御部１０をウェイクアップ制御する場合には、不要な機能ブロックである。 If it is not necessary to reduce the current consumption of the transmitter 31, the power supply control unit 21 does not have to execute the power supply control of the transmitter 31. The power supply control unit 21 is an unnecessary functional block when the main control unit 10 is wake-up controlled by the wake-up signal transmission unit 27 and the reception switching unit 28.
　上記構成のうち、特に副制御部２０の詳細動作を説明する。自ノード１ａはスリープ状態とされており、他ノード１ｂ、１ｃは通常起動している通信装置であることを前提として説明を行う。 Of the above configurations, the detailed operation of the sub-control unit 20 will be described in particular. The description will be made on the premise that the own node 1a is in the sleep state and the other nodes 1b and 1c are communication devices that are normally activated.
　図４に示すように、自ノード１ａの副制御部２０は、Ｓ１において起動完了判定部２２により主制御部１０が起動完了しているか否かを常時判定している。 As shown in FIG. 4, the sub-control unit 20 of the own node 1a constantly determines in S1 whether or not the main control unit 10 has been activated by the activation completion determination unit 22.
　このとき起動完了判定部２２は、主制御部１０が出力する信号、例えば、クロック信号、スリープ信号、又は送信信号ＴＸなどの出力に基づいて、主制御部１０が起動完了した状態にあるか否かを判定したり、又は、ＩＤ等識別部２６が自ノード１ａの起動を判定したタイミングから予め定められた一定時間が経過したか否かを判定することで、主制御部１０が起動完了した状態にあるか否かを判定したりする。 At this time, the activation completion determination unit 22 is in a state where the activation is completed based on the output of the signal output by the main control unit 10, for example, the clock signal, the sleep signal, or the transmission signal TX. The main control unit 10 has been activated by determining whether or not the predetermined fixed time has elapsed from the timing when the ID or the like identification unit 26 has determined the activation of the own node 1a. It determines whether or not it is in a state.
　なお、主制御部１０が初期化して起動完了する手順において、主制御部１０の出力信号が変化したタイミングに対し、他ノード１ｂ、１ｃとの間で正常に通信可能になるまでの間に予め定められた時間差があることが想定される場合、起動完了判定部２２は、主制御部１０の出力信号が変化してから当該時間差より長く予め設定された一定時間を経過してから起動完了したと判定しても良い。 In the procedure in which the main control unit 10 is initialized and the startup is completed, the timing when the output signal of the main control unit 10 changes is set in advance until normal communication with the other nodes 1b and 1c becomes possible. When it is assumed that there is a predetermined time difference, the start-up completion determination unit 22 completes the start-up after a predetermined fixed time longer than the time difference has elapsed after the output signal of the main control unit 10 has changed. It may be determined that.
　起動完了判定部２２は、主制御部１０が起動完了していればＳ１にてＹＥＳと判定し、Ｓ２にて通信バス２を通じて送信信号ＴＸ及び受信信号ＲＸを主制御部１０と通信するように切替える。しかし、起動完了判定部２２は、主制御部１０が起動完了していなければＳ１でＮＯと判定し、Ｓ３にて副制御部２０と通信するように切替える。 The activation completion determination unit 22 determines YES in S1 if the main control unit 10 has been activated, and communicates the transmission signal TX and the reception signal RX with the main control unit 10 through the communication bus 2 in S2. Switch. However, if the main control unit 10 has not completed the activation, the activation completion determination unit 22 determines NO in S1 and switches to communicate with the sub control unit 20 in S3.
　自ノード１ａの副制御部２０は受信信号ＲＸを待機する。トランシーバ３０が、レシーバ３２により通信バス２を検出することで他ノード（例えば１ｂ）から送出されたフレームＦＲを検出するとＳ４において信号有りと判断する。 The sub-control unit 20 of the own node 1a waits for the received signal RX. When the transceiver 30 detects the frame FR transmitted from another node (for example, 1b) by detecting the communication bus 2 by the receiver 32, it is determined in S4 that there is a signal.
　副制御部２０は、Ｓ５においてＩＤ等識別部２６によりプロテクティッドＩＤ（ＰＩＤ）の先頭Ｎビットを受信し、通信バス２に送出されているフレームＦＲのＰＩＤを途中まで識別する。そして、ＩＤ等識別部２６は、Ｓ６において応答すべきＩＤであるか否かを判定する。 The sub-control unit 20 receives the first N bits of the protected ID (PID) by the ID identification unit 26 in S5, and identifies the PID of the frame FR transmitted to the communication bus 2 halfway. Then, the ID identification unit 26 determines whether or not the ID should be answered in S6.
　副制御部２０は、応答すべきＩＤでない場合にはＳ１に戻って処理を繰り返すが、応答すべきＩＤであると判定した場合には、Ｓ７においてウェイクアップ信号送出部２７により受信切替部２８を通じてウェイクアップ信号を受信信号ＲＸとして主制御部１０に入力させることで当該主制御部１０を起動させる。ウェイクアップ信号は、ウェイクアップ用のパルス信号である。 If the sub-control unit 20 returns to S1 and repeats the process if it is not an ID to be responded to, the sub-control unit 20 returns to S1 and repeats the process. The wake-up signal is input to the main control unit 10 as a reception signal RX to activate the main control unit 10. The wake-up signal is a pulse signal for wake-up.
　また、主制御部１０が起動している最中、副制御部２０が実行する並列処理動作Ｓａとして、副制御部２０は、Ｓ８において送信制御部２３により送信切替部２４を通じてプロテクティッドＩＤ（ＰＩＤ）のＮ＋１ビット目以降をドミナントとして駆動することで故意に調停勝ちさせる。図５のタイミングｔ１～ｔ２参照。なお、プロテクティッドＩＤ（ＰＩＤ）を故意に変更する領域を、図３のフレームＦＲの送信信号ＴＸ２に示している。 Further, as a parallel processing operation Sa executed by the sub-control unit 20 while the main control unit 10 is running, the sub-control unit 20 is subjected to the protected ID (PID) through the transmission switching unit 24 by the transmission control unit 23 in S8. ) Is driven as a dominant after the N + 1th bit to intentionally win the arbitration. See timings t1 to t2 in FIG. The area where the protected ID (PID) is intentionally changed is shown in the transmission signal TX2 of the frame FR in FIG.
　例えば、通常起動時に自ノード１ａの主制御部１０が使用するフレームＩＤが図６に示す２８ｈ又は６８ｈであった場合を考える。他ノード１ｂは自ノード１ａに対してＬＳＢファーストにて０００１０の順で通信バス２にデータを送出する。自ノード１ａの副制御部２０は、プロテクティッドＩＤ（ＰＩＤ）の先頭から５ビットがＬＳＢファーストにて０００１０であった場合に、自ノード１ａのＩＤと判定し、６ビット目を強制的にドミナントにすることで０８ｈ又は４８ｈのフレームＩＤで調停勝ちできる。 For example, consider a case where the frame ID used by the main control unit 10 of the own node 1a at the time of normal startup is 28h or 68h shown in FIG. The other node 1b sends data to the communication bus 2 in the order of 00010 in LSB first to the own node 1a. When the 5th bit from the beginning of the protected ID (PID) is 00010 in LSB first, the sub-control unit 20 of the own node 1a determines that it is the ID of the own node 1a, and forcibly sets the 6th bit as dominant. By setting it to, you can win the mediation with the frame ID of 08h or 48h.
　また例えば、通常起動時に自ノード１ａの主制御部１０が使用するフレームＩＤが図７に示す６４ｈであった場合を考える。他ノード１ｂは、自ノード１ａに対してＬＳＢファーストにて００１００１の順で通信バス２にデータを送出する。このとき、自ノード１ａの副制御部２０は、プロテクティッドＩＤ（ＰＩＤ）の先頭から６ビットがＬＳＢファーストにて００１００１であった場合に自ノード１ａのＩＤと判定し、７ビット目を強制的にドミナント「０」にすることで２４ｈのフレームＩＤで調停勝ちできる。 Further, for example, consider a case where the frame ID used by the main control unit 10 of the own node 1a at the time of normal startup is 64h shown in FIG. The other node 1b sends data to the communication bus 2 in the order of 001001 in LSB first to the own node 1a. At this time, the sub-control unit 20 of the own node 1a determines that the ID of the own node 1a is 001001 when the 6 bits from the beginning of the protected ID (PID) are 004101 in LSB first, and forcibly sets the 7th bit. By setting the dominant "0", you can win the mediation with the frame ID of 24h.
　その後、副制御部２０の送信制御部２３は、図４のＳ９において、レスポンスＲＥにおいて予め定義したデータを送信することで再送を促すようにすると良い。予め定義したデータとは、他ノード１ｂが自ノード１ａから再送を促していることをプロトコル上で定義付けたデータであり、これにより他ノード１ｂがこの定義データを受信することで自ノード１ａから再送が促されていることを判断できる。 After that, the transmission control unit 23 of the sub-control unit 20 may prompt the retransmission by transmitting the data defined in advance in the response RE in S9 of FIG. The pre-defined data is data defined on the protocol that the other node 1b is urging retransmission from the own node 1a, and the other node 1b receives this defined data from the own node 1a. It can be determined that resending is being prompted.
　また副制御部２０の送信制御部２３は、図４のＳ９において、受信信号ＲＸを受信した他ノード１ｂに対し、主制御部１０が起動完了するまでの時間に対応するカウント値を含むデータを通信バス２に送出して再送を促すようにしても良い。これにより、副制御部２０は、主制御部１０がスタンバイ状態から起動完了するまでの間、自ノード１ａに関係する通信の再送を促すことができる。 Further, in S9 of FIG. 4, the transmission control unit 23 of the sub control unit 20 inputs data including a count value corresponding to the time until the main control unit 10 completes activation for the other node 1b that has received the received signal RX. It may be sent to the communication bus 2 to prompt the retransmission. As a result, the sub-control unit 20 can urge the main control unit 10 to retransmit the communication related to the own node 1a from the standby state to the completion of startup.
　図５に示すように、副制御部２０の送信制御部２３は、タイミングｔ２における差分カウンタ値Ｄ１をフレームＦＲのデータＤＡＴＡに設定して送信する。この差分カウンタ値Ｄ１は、副制御部２０のカウンタ３４が、内蔵クロックをカウントすることでタイミングｔ２から予め定められた閾値まで達するまでのカウント値を示す。 As shown in FIG. 5, the transmission control unit 23 of the sub-control unit 20 sets the difference counter value D1 at the timing t2 in the data DATA of the frame FR and transmits the data. The difference counter value D1 indicates a count value from the timing t2 until the counter 34 of the sub-control unit 20 counts the built-in clock to reach a predetermined threshold value.
　他ノード１ｂでは、主制御部１０がレシーバ３２を通じてレスポンスＲＥのデータＤＡＴＡを受信するとデータＤＡＴＡを読取る。他ノード１ｂの主制御部１０は、差分カウンタ値Ｄ１に対応した時間だけ待機した後、タイミングｔ５において他ノード１ｂが再度同一のプロテクティッドＩＤ（ＰＩＤ）を含むフレームＦＲを通信バス２に送出する。これにより、他ノード１ｂは自ノード１ａとの通信をリトライできる。 In the other node 1b, when the main control unit 10 receives the data DATA of the response RE through the receiver 32, the data DATA is read. The main control unit 10 of the other node 1b waits for a time corresponding to the difference counter value D1, and then at the timing t5, the other node 1b again sends a frame FR including the same protected ID (PID) to the communication bus 2. .. As a result, the other node 1b can retry communication with the own node 1a.
　また、他ノード１ｂでは、主制御部１０が差分カウンタ値Ｄ１に対応した時間だけ待機する間、他ノード（例えば１ｃ）との間で通信するためのフレームＦＲを通信バス２に送出し、タイミングｔ２の後のタイミングｔ２ａから所定の間、他のノード１ｃと間でデータ通信できる。これにより、他ノード１ｂは、差分カウンタ値Ｄ１に対応した待機時間を、他の通信に活用できる。しかも通信バス２の使用効率を向上できる。 Further, in the other node 1b, while the main control unit 10 waits for the time corresponding to the difference counter value D1, the frame FR for communicating with the other node (for example, 1c) is sent to the communication bus 2 and the timing is set. Data communication can be performed with another node 1c for a predetermined time from the timing t2a after t2. As a result, the other node 1b can utilize the standby time corresponding to the difference counter value D1 for other communication. Moreover, the usage efficiency of the communication bus 2 can be improved.
　なお、図５のタイミングｔ３において、自ノード１ａと他ノード１ｃとが通信バス２にて通信衝突を生じ、自ノード１ａが他ノード１ｃに対し調停勝ちした場合、他ノード１ｃは差分カウント値Ｄ２に対応した時間だけ待機した後、タイミングｔ５にて自ノード１ａとの通信をリトライする。この場合、他ノード１ｂ及び他ノード１ｃは、フレームＦＲを同時に通信バス２に送出することになるが、このときには通常の調停が行われることになり、自ノード１ａは、他ノード１ｂ又は他ノード１ｃの何れかと通信できる。 At the timing t3 of FIG. 5, when the own node 1a and the other node 1c cause a communication collision on the communication bus 2 and the own node 1a wins the arbitration against the other node 1c, the other node 1c has the difference count value D2. After waiting for the time corresponding to the above, the communication with the own node 1a is retried at the timing t5. In this case, the other node 1b and the other node 1c simultaneously send the frame FR to the communication bus 2, but at this time, normal arbitration is performed, and the own node 1a is the other node 1b or the other node. Can communicate with any of 1c.
　以上説明したように、本実施形態によれば、主制御部１０がスタンバイ状態であるときに、自ノード１ａに関係するフレームＦＲが通信バス２に送出された場合、副制御部２０は主制御部１０をスタンバイ状態から起動すると共に、主制御部１０が起動完了するまでの間、自ノード１ａに関係するフレームＦＲの再送を促すように主制御部１０の代わりに他ノード１ｂと通信制御している。これにより、主制御部１０が起動完了するまでに自ノード１ａ宛にフレームＦＲが送出されたとしても適切に対応できる。自ノード１ａに関係しないＩＤを含む通信が通信バス２を介して行われている場合には、主制御部１０をスタンバイ状態に維持できる。 As described above, according to the present embodiment, when the frame FR related to the own node 1a is sent to the communication bus 2 while the main control unit 10 is in the standby state, the sub control unit 20 is in the main control. While starting the unit 10 from the standby state, communication control is performed with another node 1b instead of the main control unit 10 so as to prompt the retransmission of the frame FR related to the own node 1a until the main control unit 10 completes the activation. ing. As a result, even if the frame FR is sent to the own node 1a by the time the main control unit 10 completes activation, it can be appropriately dealt with. When communication including an ID not related to the own node 1a is performed via the communication bus 2, the main control unit 10 can be maintained in the standby state.
　自ノード１ａに関係するデータが通信バス２に送出された場合、副制御部２０は、主制御部１０を低消費電力モードから通常動作モードに起動させると共に、主制御部１０が通常動作モードに起動完了するまでの間、自ノード１ａに関係する通信の再送を促すように主制御部１０の代わりに通信制御するため、主制御部１０が起動中であっても他ノード１ｂ、１ｃとの間で適切に対応できる。他ノード１ｂ、１ｃは通信の再送を行うことができ、他ノード１ｂ、１ｃの通信スケジュール等への悪影響を抑制できる。主制御部１０が起動した後は、本来のデータを送受信できるようになり、他ノード１ｂ、１ｃへの通信スケジュール等への影響を最小限にできる。 When the data related to the local node 1a is sent to the communication bus 2, the sub-control unit 20 activates the main control unit 10 from the low power consumption mode to the normal operation mode, and the main control unit 10 switches to the normal operation mode. Until the startup is completed, the communication is controlled instead of the main control unit 10 so as to prompt the retransmission of the communication related to the own node 1a, so that even if the main control unit 10 is running, it is with the other nodes 1b and 1c. We can respond appropriately between them. The other nodes 1b and 1c can retransmit the communication, and the adverse effect on the communication schedule and the like of the other nodes 1b and 1c can be suppressed. After the main control unit 10 is activated, the original data can be transmitted and received, and the influence on the communication schedule and the like to the other nodes 1b and 1c can be minimized.
　また自ノード１ａの副制御部２０では、主制御部１０が起動完了していないときに、ＩＤ等識別部２６が、主制御部１０の代わりに通信バス２に送出されるＩＤを途中まで識別し、ＩＤ等識別部２６により自ノード１ａに対するＩＤと判断したときに、副制御部２０の送信制御部２３が調停勝ちするＩＤに変更して通信バス２に送信している。ここで、送信制御部２３は起動完了までの時間に対応する差分カウンタ値Ｄ１を含むデータを送信するようにしている。 Further, in the sub-control unit 20 of the local node 1a, when the main control unit 10 has not been started, the ID and the like identification unit 26 identifies the ID sent to the communication bus 2 instead of the main control unit 10 halfway. Then, when the ID and the like identification unit 26 determines that the ID is for the own node 1a, the transmission control unit 23 of the sub-control unit 20 changes the ID to an ID that wins arbitration and transmits the ID to the communication bus 2. Here, the transmission control unit 23 transmits data including the difference counter value D1 corresponding to the time until the activation is completed.
　これにより、他ノード１ｂでは、差分カウンタ値Ｄ１に対応した時間だけ待機した後に、再度自ノード１ａとの通信をリトライできる。しかも、他ノード１ｂでは、そのリトライするまでの間の時間を、他ノード（例えば１ｃ）との間の通信に活用でき、通信バス２の使用効率を向上できる。 As a result, the other node 1b can retry communication with the own node 1a after waiting for the time corresponding to the difference counter value D1. Moreover, in the other node 1b, the time until the retry can be utilized for communication with another node (for example, 1c), and the usage efficiency of the communication bus 2 can be improved.
　（第２実施形態）
　第２実施形態について図８を参照して説明する。図８は、図４に代えて示すフローチャートである。自ノード１ａの副制御部２０は、Ｓ１において、起動完了判定部２２により主制御部１０が起動完了しているか否かを常時判定している。起動完了判定部２２は、主制御部１０が起動完了していればＳ１にてＹＥＳと判定し、Ｓ２にて通信バス２を通じて送信信号ＴＸ及び受信信号ＲＸを主制御部１０と通信するように切替える。しかし、起動完了判定部２２は、主制御部１０が起動完了していなければＳ１でＮＯと判定し、Ｓ３にて副制御部２０と通信するように切替える。 (Second Embodiment)
The second embodiment will be described with reference to FIG. FIG. 8 is a flowchart shown in place of FIG. In S1, the sub-control unit 20 of the own node 1a constantly determines whether or not the main control unit 10 has been activated by the activation completion determination unit 22. The activation completion determination unit 22 determines YES in S1 if the main control unit 10 has been activated, and communicates the transmission signal TX and the reception signal RX with the main control unit 10 through the communication bus 2 in S2. Switch. However, if the main control unit 10 has not completed the activation, the activation completion determination unit 22 determines NO in S1 and switches to communicate with the sub control unit 20 in S3.
　自ノード１ａの副制御部２０は通信バス２を監視し信号を待機する。トランシーバ３０がレシーバ３２により他ノード（例えば１ｂ）から通信バス２にフレームＦＲを検出すると、副制御部２０は、Ｓ４において信号有りと判断する。副制御部２０は、Ｓ５ａにおいてＩＤ等識別部２６によりプロテクティッドＩＤ（ＰＩＤ）を全て受信し、Ｓ６において応答すべきＩＤであるか否かを判定する。 The sub-control unit 20 of the own node 1a monitors the communication bus 2 and waits for a signal. When the transceiver 30 detects the frame FR on the communication bus 2 from another node (for example, 1b) by the receiver 32, the sub-control unit 20 determines that there is a signal in S4. The sub-control unit 20 receives all the protected IDs (PIDs) by the ID identification unit 26 in S5a, and determines whether or not the ID is an ID to be responded to in S6.
　副制御部２０は、Ｓ１０においてヘッダＨにエラーが無いことを条件としてステップＳ７及びＳ９ａの処理を並列処理する。副制御部２０は、Ｓ７においてウェイクアップ信号送出部２７により受信切替部２８を通じてウェイクアップ信号を主制御部１０に入力させることで当該主制御部１０を起動する。 The sub-control unit 20 processes the processes of steps S7 and S9a in parallel on condition that there is no error in the header H in S10. The sub-control unit 20 activates the main control unit 10 by causing the wake-up signal transmission unit 27 to input the wake-up signal to the main control unit 10 through the reception switching unit 28 in S7.
　また、主制御部１０が起動している最中、副制御部２０が実行する並列処理動作Ｓａとして、副制御部２０は、図８のＳ９ａにおいて、信号受信した他ノード１ｂに対し、主制御部１０が起動完了するまでの時間に対応するカウント値をデータＤＡＴＡとして通信バス２に送信する。この場合、第１実施形態と同様の効果を奏する。 Further, as a parallel processing operation Sa executed by the sub-control unit 20 while the main control unit 10 is running, the sub-control unit 20 controls the other node 1b that received the signal in S9a of FIG. The count value corresponding to the time until the start of the unit 10 is completed is transmitted to the communication bus 2 as data DATA. In this case, the same effect as that of the first embodiment is obtained.
　また副制御部２０は、図８のＳ９ａにおいて、データに付加するＣＲＣ符号による誤り検出符号について故意にエラーを含むように予め定義したデータを送信しても良い。なお、故意にエラーを生じさせる領域を図３の送信信号ＴＸ３に示している。自ノード１ａが、他ノード１ｂへの返信時にレスポンスＲＥにおいて故意にエラーを生じさせることで、自ノード１ａ及び他ノード１ｂの間のハンドシェイクを意図的に非成立させると共に、他ノード１ｂに再送を促すことができる。第２実施形態においても、第１実施形態と同様の作用効果を奏する。 Further, the sub-control unit 20 may transmit data defined in advance so as to intentionally include an error in the error detection code by the CRC code added to the data in S9a of FIG. The area where an error is intentionally caused is shown in the transmission signal TX3 in FIG. When the own node 1a intentionally causes an error in the response RE when replying to the other node 1b, the handshake between the own node 1a and the other node 1b is intentionally not established and retransmitted to the other node 1b. Can be urged. The second embodiment also has the same effect as that of the first embodiment.
　（第３実施形態）
　第３実施形態について図９を参照して説明する。図９は、図４に代えて示すフローチャートであり、Ｓ１～Ｓ６の処理内容は第１実施形態で説明した図４に示す処理内容と同様であるため説明を省略する。 (Third Embodiment)
The third embodiment will be described with reference to FIG. FIG. 9 is a flowchart shown in place of FIG. 4, and since the processing contents of S1 to S6 are the same as the processing contents shown in FIG. 4 described in the first embodiment, the description thereof will be omitted.
　副制御部２０は、Ｓ６において応答すべきＩＤであると判断すると、ステップＳ７及びＳ８ａを並列処理する。副制御部２０は、Ｓ７においてウェイクアップ信号送出部２７により受信切替部２８を通じてウェイクアップ信号を主制御部１０に入力させることで当該主制御部１０を起動する。 When the sub-control unit 20 determines that the ID should be responded to in S6, the sub-control unit 20 processes steps S7 and S8a in parallel. The sub-control unit 20 activates the main control unit 10 by causing the wake-up signal transmission unit 27 to input the wake-up signal to the main control unit 10 through the reception switching unit 28 in S7.
　また、主制御部１０が起動している最中、副制御部２０が実行する並列処理動作Ｓａとして、副制御部２０は、図９のＳ８ａにおいて、エラー駆動部となるトランスミッタ３１が、プロテクティッドＩＤ（ＰＩＤ）のストップビットＥをドミナントに駆動することでビットエラー等を生じるように通信バス２を駆動する。なお、故意にエラーを生じさせるビット領域を図２の送信信号ＴＸ４に示している。 Further, as the parallel processing operation Sa executed by the sub-control unit 20 while the main control unit 10 is running, the sub-control unit 20 has the transmitter 31 as the error driving unit protected in S8a of FIG. By driving the stop bit E of the ID (PID) dominantly, the communication bus 2 is driven so as to cause a bit error or the like. The bit region that intentionally causes an error is shown in the transmission signal TX4 of FIG.
　自ノード１ａが、他ノード１ｂへの返信時にレスポンスＲＥ域において故意にエラーを生じさせることで、自ノード１ａ及び他ノード１ｂ間のハンドシェイクを非成立させることが可能である。第３実施形態においても、第１実施形態と同様の作用効果を奏する。 It is possible for the own node 1a to intentionally cause an error in the response RE area when replying to the other node 1b, so that the handshake between the own node 1a and the other node 1b cannot be established. The third embodiment also has the same effect as that of the first embodiment.
　（第４実施形態）
　図１０は第４実施形態の説明図を示す。図１０は図４に代えて示すフローチャートであり、Ｓ３～Ｓ９の処理は第１実施形態で説明した図４に示す処理と同様であるため説明を省略する。図１０に示すように、主制御部１０がスタンバイ状態のときだけ実行するようにしても良い。 (Fourth Embodiment)
FIG. 10 shows an explanatory diagram of the fourth embodiment. FIG. 10 is a flowchart shown in place of FIG. 4, and since the processes of S3 to S9 are the same as the processes shown in FIG. 4 described in the first embodiment, the description thereof will be omitted. As shown in FIG. 10, it may be executed only when the main control unit 10 is in the standby state.
　副制御部２０は、Ｓ１において起動完了判定部２２により主制御部１０が起動完了したと判断した後、Ｓ２において主制御部１０が通信バス２を通じて通信できるように切り替えれば、副制御部２０は主制御部１０に通信制御の主導権を移行して制御処理を終了するようにしても良い。 If the sub-control unit 20 determines in S1 that the activation completion determination unit 22 has completed the activation of the main control unit 10 and then switches the main control unit 10 so that the main control unit 10 can communicate through the communication bus 2 in S2, the sub-control unit 20 will be able to perform the operation. The control process may be terminated by transferring the initiative of communication control to the main control unit 10.
　（第５実施形態）
　第５実施形態について図１１を参照して説明する。図１１に示すように、副制御部２０は、Ｓ１において起動完了判定部２２により主制御部１０が起動完了したと判断した後、Ｓ２において主制御部１０が通信バス２を通じて通信できるように切り替える。 (Fifth Embodiment)
The fifth embodiment will be described with reference to FIG. As shown in FIG. 11, the sub-control unit 20 switches so that the main control unit 10 can communicate through the communication bus 2 in S2 after the activation completion determination unit 22 determines that the main control unit 10 has been activated in S1. ..
　しかし、副制御部２０の電源制御部２１は、Ｓ１１において主制御部１０がスリープ状態に移行することを示すスリープ要求を入力したときには、Ｓ３において副制御部２０が他ノード１ｂ、１ｃとの間で通信するように切替え、副制御部２０が通信制御を再開するようにしても良い。 However, when the power supply control unit 21 of the sub control unit 20 inputs a sleep request indicating that the main control unit 10 shifts to the sleep state in S11, the sub control unit 20 is between the other nodes 1b and 1c in S3. The communication may be switched so that the sub-control unit 20 restarts the communication control.
　（第６実施形態）
　第６実施形態について図１２及び図１３を参照して説明する。第６実施形態以降は、ＬＩＮ（Local Interconnect Network）に適用した形態を説明する。ＬＩＮは、車載通信の中でもシャシー制御やパワートレイン制御に用いられており、ＣＡＮのサブネットワークとして車載向けに普及している通信規格である。図１２にはＬＩＮ通信規格のフレームフォーマットを示している。 (Sixth Embodiment)
The sixth embodiment will be described with reference to FIGS. 12 and 13. From the sixth embodiment onward, a mode applied to LIN (Local Interconnect Network) will be described. LIN is used for chassis control and power train control in in-vehicle communication, and is a communication standard that is widely used for in-vehicle use as a sub-network of CAN. FIG. 12 shows the frame format of the LIN communication standard.
　ヘッダＨは、マスタが送信信号ＴＸmasとして通信バス２に送出する領域であり、先頭からブレークフィールドＢＦ、シンクバイトフィールドＳＢＦ、保護フィールドＰＩＦに区分できる。ブレークフィールドＢＦはフレームＦＲの始めを示す。 The header H is an area that the master sends to the communication bus 2 as a transmission signal TXmas, and can be divided into a break field BF, a sync byte field SBF, and a protection field PIF from the beginning. The break field BF marks the beginning of the frame FR.
　シンクバイトフィールドＳＢＦは、複数のパルスによるもので各通信ノードの誤差検出用の基準クロックを示している。保護フィールドＰＩＦは、６ビットのＩＤ、ＤＬＣ、２ビットのパリティにより構成されている。シンクバイトフィールドＳＢＦ及び保護フィールドＰＩＦは、スタートビットＳ、エンドビットＥで挟んで構成されるフィールドである。 The sync byte field SBF is based on a plurality of pulses and indicates a reference clock for error detection of each communication node. The protected field PIF is composed of a 6-bit ID, a DLC, and a 2-bit parity. The sync byte field SBF and the protection field PIF are fields configured by sandwiching the start bit S and the end bit E.
　他方、レスポンスＲＥは、マスタ、又は、マスタがヘッダＨで指定したＩＤにより指定されるスレーブが通信バス２に送出する領域を示し、１バイトから８バイトのデータＤＡＴＡ、及びチェックサムＣＳのフィールドにより構成される。チェックサムＣＳは、データ誤り検出用に設けられている。 On the other hand, the response RE indicates an area to be transmitted to the communication bus 2 by the master or the slave specified by the ID specified by the master in the header H, and is based on 1-byte to 8-byte data DATA and checksum CS fields. It is composed. The checksum CS is provided for data error detection.
　ＬＩＮを用いた場合であっても、構成は第１実施形態と同様であるため構成説明を省略する。図１３は、図８に代えて示すフローチャートである。Ｓ１～Ｓ４の処理内容は第２実施形態にて図８を用いて示した処理内容と同様であるため説明を省略する。 Even when LIN is used, the configuration description is omitted because the configuration is the same as that of the first embodiment. FIG. 13 is a flowchart shown in place of FIG. Since the processing contents of S1 to S4 are the same as the processing contents shown with reference to FIG. 8 in the second embodiment, the description thereof will be omitted.
　ＬＩＮを適用した場合、ＣＸＰＩ通信のＰＩＤに代えてＩＤを用いて通信する。このため副制御部２０は、Ｓ５ｂにおいてＩＤ等識別部２６によりヘッダＨに含まれるＩＤの先頭Ｎビットを受信し、通信バス２に送出されるＩＤを主制御部１０の代わりに途中まで識別する。そして、ＩＤ等識別部２６はＳ６において応答すべきＩＤであるか否かを判定する。 When LIN is applied, communication is performed using ID instead of PID of CXPI communication. Therefore, the sub-control unit 20 receives the first N bits of the ID included in the header H by the ID identification unit 26 in S5b, and identifies the ID transmitted to the communication bus 2 halfway instead of the main control unit 10. .. Then, the ID identification unit 26 determines whether or not the ID should be answered in S6.
　その後、副制御部２０は、Ｓ１０においてヘッダＨにエラーが無いことを条件としてステップＳ７及びＳ９ｂの処理を並列処理する。副制御部２０は、Ｓ７においてウェイクアップ信号送出部２７により受信切替部２８を通じてウェイクアップ信号を主制御部１０に入力させることで主制御部１０を起動する。 After that, the sub-control unit 20 processes the processes of steps S7 and S9b in parallel on condition that there is no error in the header H in S10. The sub-control unit 20 activates the main control unit 10 by causing the wake-up signal transmission unit 27 to input the wake-up signal to the main control unit 10 through the reception switching unit 28 in S7.
　また、主制御部１０が起動している最中、副制御部２０が実行する並列処理動作Ｓａとして、副制御部２０は、図１３のＳ９ｂにおいて、受信信号ＲＸを受信した他ノード１ｂに対し、主制御部１０が起動完了するまでの時間に対応するカウント値を含むデータを通信バス２に送信する。これにより、副制御部２０は第１実施形態と同様に他ノード１ｂに対し再送を促すことができ、他ノード１ｂはこの時間を経過した後に再送できる。これにより、第１実施形態と同様の効果を奏する。 Further, as a parallel processing operation Sa executed by the sub-control unit 20 while the main control unit 10 is running, the sub-control unit 20 refers to the other node 1b that has received the received signal RX in S9b of FIG. , Data including a count value corresponding to the time until the main control unit 10 completes activation is transmitted to the communication bus 2. As a result, the sub-control unit 20 can urge the other node 1b to retransmit as in the first embodiment, and the other node 1b can retransmit after this time has elapsed. As a result, the same effect as that of the first embodiment is obtained.
　また副制御部２０は、図１３のＳ９ｂにおいて、データに付加するチェックサムＣＳの誤り検出符号について故意にエラーを含むように予め定義したデータを送信しても良い。なお、故意にエラーを生じさせる領域を図１２の送信信号ＴＸ３に示している。自ノード１ａが、他ノード１ｂへの返信時にレスポンスＲＥにおいて故意にエラーを生じさせることで、副制御部２０は、第２実施形態と同様にノード１ｂに対し再送を促すことができる。第６実施形態に示したようにＬＩＮに適用した場合でも同様に、第２実施形態と同様の作用効果を奏する。 Further, the sub-control unit 20 may transmit data defined in advance so as to intentionally include an error in the error detection code of the checksum CS added to the data in S9b of FIG. The area where an error is intentionally caused is shown in the transmission signal TX3 in FIG. When the own node 1a intentionally causes an error in the response RE when replying to the other node 1b, the sub-control unit 20 can urge the node 1b to retransmit as in the second embodiment. Even when applied to LIN as shown in the sixth embodiment, the same action and effect as those of the second embodiment are similarly obtained.
　本実施形態では、Ｓ５ｂにおいてＩＤを先頭Ｎbit受信することで自ノード１ａに対するＩＤであるか識別し応答すべきＩＤであるか判定したが、これに限定されるものではなく、全てのＩＤを受信した後に自ノード１ａに対するＩＤであるか識別し応答すべきＩＤであるか判定するようにしても良い。 In the present embodiment, by receiving the first Nbit of the ID in S5b, it is determined whether it is an ID for the own node 1a and whether it is an ID to be responded to, but the present invention is not limited to this, and all IDs are received. After that, it may be determined whether it is an ID for the own node 1a and whether it is an ID to be responded to.
　（第７実施形態）
　第７実施形態について図１４を参照して説明する。図１４は、図１３に代えて示すフローチャートであり、Ｓ１～Ｓ６の処理内容は第６実施形態で説明した図１３に示す処理内容と同様であるため説明を省略する。 (7th Embodiment)
The seventh embodiment will be described with reference to FIG. FIG. 14 is a flowchart shown in place of FIG. 13, and since the processing contents of S1 to S6 are the same as the processing contents shown in FIG. 13 described in the sixth embodiment, the description thereof will be omitted.
　副制御部２０は、Ｓ６を処理した後、ヘッダＨのエラー有無に拘わらずステップＳ７及びＳ８ｂの処理を並列処理する。副制御部２０は、Ｓ７においてウェイクアップ信号送出部２７により受信切替部２８を通じてウェイクアップ信号を主制御部１０に入力させることで起動する。 After processing S6, the sub-control unit 20 processes the processes of steps S7 and S8b in parallel regardless of the presence or absence of an error in the header H. The sub control unit 20 is activated by causing the wakeup signal transmission unit 27 to input the wakeup signal to the main control unit 10 through the reception switching unit 28 in S7.
　また、主制御部１０が起動している最中、副制御部２０が実行する並列処理動作Ｓａとして、副制御部２０は、図１４のＳ８ｂにおいて、エラー駆動部となるトランスミッタ３１からＩＤのストップビットＥをドミナントに駆動することでビットエラーを生じるように通信バス２を駆動する。なお、故意にエラーを生じさせる領域を図１２の送信信号ＴＸ４に示している。 Further, as the parallel processing operation Sa executed by the sub-control unit 20 while the main control unit 10 is running, the sub-control unit 20 stops the ID from the transmitter 31 which is the error driving unit in S8b of FIG. The communication bus 2 is driven so as to cause a bit error by driving the bit E dominantly. The area where an error is intentionally caused is shown in the transmission signal TX4 of FIG.
　自ノード１ａが、他ノード１ｂへの返信時にレスポンスＲＥにおいて故意にエラーを生じさせることで、自ノード１ａ及び他ノード１ｂ間のハンドシェイクを非成立させることができる。これにより、副制御部２０は、ノード１ｂに対し再送を促すことができる。第７実施形態においても、第６実施形態と同様の作用効果を奏する。 When the own node 1a intentionally causes an error in the response RE when replying to the other node 1b, the handshake between the own node 1a and the other node 1b can be unsuccessful. As a result, the sub-control unit 20 can urge the node 1b to retransmit. The seventh embodiment also has the same effect as that of the sixth embodiment.
　本実施形態でも同様に、Ｓ５ｂにおいてＩＤを先頭Ｎbit受信することで自ノード１ａに対するＩＤであるか識別し応答すべきＩＤであるか判定したが、これに限定されるものではなく、全てのＩＤを受信した後に自ノード１ａに対するＩＤであるか識別し応答すべきＩＤであるか判定するようにしても良い。 Similarly, in the present embodiment, by receiving the ID at the beginning Nbit in S5b, it is determined whether it is an ID for the own node 1a and whether it is an ID to be responded to, but the present invention is not limited to this, and all IDs are not limited to this. It may be possible to identify whether it is an ID for its own node 1a and determine whether it is an ID to respond after receiving.
　（第８実施形態）
　第８実施形態について図１５を参照して説明する。図１５は、図１４に代えて示すフローチャートであり、Ｓ１～Ｓ６の処理内容は第６実施形態で説明した図１３に示す処理内容と同様であるため説明を省略する。 (8th Embodiment)
The eighth embodiment will be described with reference to FIG. FIG. 15 is a flowchart shown in place of FIG. 14, and since the processing contents of S1 to S6 are the same as the processing contents shown in FIG. 13 described in the sixth embodiment, the description thereof will be omitted.
　図１５に示すように、主制御部１０が起動している最中、副制御部２０が実行する並列処理動作Ｓａとして、副制御部２０は、図１５のＳ８ｃにおいて、エラー駆動部となるトランスミッタ３１が、ＩＤのＮ＋１bit以降のパリティビットにおいてＩＤパリティエラーとなるようにドミナントに駆動することでエラーを故意に発生させるように通信バス２を駆動する。なお、故意にエラーを生じさせる領域を図１２の送信信号ＴＸ５に示している。 As shown in FIG. 15, as the parallel processing operation Sa executed by the sub-control unit 20 while the main control unit 10 is running, the sub-control unit 20 serves as an error driving unit in S8c of FIG. 31 drives the communication bus 2 so as to intentionally generate an error by driving it dominantly so that an ID parity error occurs in the parity bits after N + 1 bits of the ID. The area where an error is intentionally caused is shown in the transmission signal TX5 in FIG.
　自ノード１ａが、他ノード１ｂへの返信時にレスポンスＲＥにおいて故意にエラーを生じさせることで、自ノード１ａ及び他ノード１ｂ間のハンドシェイクを非成立させることができる。第８実施形態においても、第６及び第７実施形態と同様の作用効果を奏する。 When the own node 1a intentionally causes an error in the response RE when replying to the other node 1b, the handshake between the own node 1a and the other node 1b can be unsuccessful. The eighth embodiment also has the same effects as those of the sixth and seventh embodiments.
　（第９実施形態）
　第９実施形態について図１６から図２２を参照して説明する。副制御部２０は、主制御部１０を起動させるため、例えば図４のＳ７等においてウェイクアップ信号送出部２７から主制御部１０にウェイクアップ信号を送信するが、このとき主制御部１０はＣＰＵ１２がソフトウェアを実行してデータを送受信可能になる通常状態に起動完了するまで時間を要する。 (9th Embodiment)
A ninth embodiment will be described with reference to FIGS. 16 to 22. In order to activate the main control unit 10, the sub control unit 20 transmits a wakeup signal from the wakeup signal transmission unit 27 to the main control unit 10 in, for example, S7 in FIG. 4, but at this time, the main control unit 10 transmits the wakeup signal to the CPU 12. It takes time to complete the startup to the normal state where the software can be executed and data can be sent and received.
　そこで、副制御部２０の起動完了判定部２２は、以下のように主制御部１０がいつ起動完了するタイミングｔ１となるか、又は、いつ起動完了するタイミングｔ１であるか判定すると良い。 Therefore, the activation completion determination unit 22 of the sub control unit 20 may determine when the activation completion timing t1 of the main control unit 10 is reached or when the activation completion timing t1 is as follows.
　まず起動完了判定部２２は、通信バス２に送出されたフレームＦＲのＩＤが自ノード１ａに対するＩＤと判断され、例えば図４のＳ７等でウェイクアップパルス信号を送出し、主制御部１０を起動し始めたタイミングを起動開始タイミングｔ０とする。そして起動完了判定部２２は、図１６に示すように、起動開始タイミングｔ０を起点として自ノード１ａに内蔵される内部クロックをカウントし、このカウント値が所定の閾値に達したタイミングを起動完了タイミングｔ１と判定すると良い。 First, the activation completion determination unit 22 determines that the ID of the frame FR transmitted to the communication bus 2 is the ID for the own node 1a, transmits a wake-up pulse signal in S7 or the like in FIG. 4, for example, and activates the main control unit 10. The timing at which the start is started is set as the start start timing t0. Then, as shown in FIG. 16, the activation completion determination unit 22 counts the internal clock built in the own node 1a starting from the activation start timing t0, and the activation completion timing is the timing when this count value reaches a predetermined threshold value. It is good to judge it as t1.
　また図１７に示すように、起動開始タイミングｔ０を起点として、マスタからＣＸＰＩ通信方式を用いて通信バス２に送出されるバスクロックをカウントし、このカウント値が所定の閾値に達したタイミングを起動完了タイミングｔ１と判定しても良い。バスクロックを分周したクロックを用いても良い。バスクロックを用いて時間をカウントする場合、他ノード１ｂ、１ｃとの同期を保つことができるため、特に有効に作用する。 Further, as shown in FIG. 17, the bus clock transmitted from the master to the communication bus 2 is counted from the master using the CXPI communication method starting from the start timing t0, and the timing when the count value reaches a predetermined threshold value is started. It may be determined that the completion timing is t1. A clock obtained by dividing the bus clock may be used. When the time is counted using the bus clock, synchronization with other nodes 1b and 1c can be maintained, which is particularly effective.
　また図１８に示すように、起動完了判定部２２は、起動開始タイミングｔ０を起点として、自ノード１ａに内蔵される電流源からコンデンサに充電を開始し、当該充電電圧をコンパレータなどの比較器により検知するようにしても良い。起動完了判定部２２は、当該充電電圧が所定の閾値電圧に達したタイミングを起動完了タイミングｔ１と判定しても良い。 Further, as shown in FIG. 18, the start-up completion determination unit 22 starts charging the capacitor from the current source built in the own node 1a with the start-up start timing t0 as the starting point, and the charging voltage is measured by a comparator such as a comparator. It may be detected. The start-up completion determination unit 22 may determine the timing at which the charge voltage reaches a predetermined threshold voltage as the start-up completion timing t1.
　また逆に、起動完了判定部２２は、起動開始タイミングｔ０において、予め蓄電されたコンデンサから放電開始し、この放電された電圧が所定の閾値電圧に達したタイミングを起動完了タイミングｔ１と判定しても良い。このように起動完了判定部２２は、起動開始タイミングｔ０から予め設定した時間を経過した場合に起動完了タイミングｔ１である旨を判定できる。 On the contrary, at the start-up start timing t0, the start-up completion determination unit 22 starts discharging from the capacitor stored in advance, and determines that the timing at which the discharged voltage reaches a predetermined threshold voltage is set as the start-up completion timing t1. Is also good. In this way, the start-up completion determination unit 22 can determine that the start-up completion timing t1 is reached when a preset time has elapsed from the start-up start timing t0.
　また起動完了判定部２２は、主制御部１０が起動完了するまでの間、主制御部１０が起動したか否かを判断するために、主制御部１０が出力する信号を用いて判定しても良い。起動完了判定部２２が起動完了を判定するために用いる主制御部１０の出力信号としては、内部クロックの出力、ＰＷＭ信号の出力、汎用Ｉ／Ｏの出力ポート、スリープ要求信号の出力、送信信号ＴＸの出力、又は、ウォッチドッグタイマの監視用出力、等である。 Further, the activation completion determination unit 22 determines using the signal output by the main control unit 10 in order to determine whether or not the main control unit 10 has been activated until the main control unit 10 completes activation. Is also good. The output signals of the main control unit 10 used by the activation completion determination unit 22 to determine the activation completion include an internal clock output, a PWM signal output, a general-purpose I / O output port, a sleep request signal output, and a transmission signal. TX output, watchdog timer monitoring output, etc.
　例えば、図１９に示すように、起動完了判定部２２は、主制御部１０が備える汎用Ｉ／Ｏの出力ポートの電圧、送信信号ＴＸの出力電圧、又は、スリープ要求信号等の出力端子電圧ＶoutのＤＣレベルを検出し、出力端子電圧Ｖoutが所定の条件を満たしたときに起動完了タイミングｔ１と判定すると良い。例えば、出力端子電圧ＶoutのＤＣレベルの上限値をα１、下限値をβ１としたときに、Ｖout＜α１、β１＜Ｖout、β１＜Ｖout＜α１の何れか一つ以上の条件を満たしたときに起動完了タイミングｔ１と判定すると良い。 For example, as shown in FIG. 19, the start-up completion determination unit 22 has a voltage of the output port of the general-purpose I / O included in the main control unit 10, an output voltage of the transmission signal TX, or an output terminal voltage Vout of a sleep request signal or the like. It is preferable to detect the DC level of the above and determine the start completion timing t1 when the output terminal voltage Vout satisfies a predetermined condition. For example, when the upper limit of the DC level of the output terminal voltage Vout is α1 and the lower limit is β1, and any one or more of Vout <α1, β1 <Vout, and β1 <Vout <α1 are satisfied. It is good to judge that the start completion timing is t1.
　例えば、図２０に示すように、起動完了判定部２２は、主制御部１０の出力端子から出力される内部クロックの電圧を検出したタイミングを起動完了タイミングｔ１としても良い。このとき、内部クロックの電圧の周期Ｔが予め定められる所定の条件を満たしているときに起動完了したと判定することが望ましい。例えば、内部クロックの周期Ｔの上限値をα２、下限値をβ２としたときに、Ｔ＜α２、β２＜Ｔ、β２＜Ｔ＜α２の何れか一つ以上の条件を満たしたときを起動完了タイミングｔ１と判定すると良い。 For example, as shown in FIG. 20, the start-up completion determination unit 22 may set the timing at which the voltage of the internal clock output from the output terminal of the main control unit 10 is detected as the start-up completion timing t1. At this time, it is desirable to determine that the start-up is completed when the voltage cycle T of the internal clock satisfies a predetermined condition. For example, when the upper limit of the period T of the internal clock is α2 and the lower limit is β2, the activation is completed when any one or more of T <α2, β2 <T, and β2 <T <α2 are satisfied. It is good to determine the timing t1.
　また、図２１に示すように、起動完了判定部２２は、主制御部１０の出力端子から出力されるＰＷＭ信号電圧を検出したタイミングを起動完了タイミングｔ１としても良い。このとき、ＰＷＭ信号電圧のオン期間Ｔon又は／及びオフ期間Ｔoffが予め定められる所定の条件を満たしているときに起動完了した旨を判定することが望ましい。例えば、ＰＷＭ信号電圧のオン期間Ｔonの上限値をα３、下限値をβ３とし、オフ期間Ｔoffの上限値をα４、下限値をβ４としたときに、Ｔon＜α３、β３＜Ｔon、β３＜Ｔon＜α３、Ｔoff＜α４、β４＜Ｔoff、β４＜Ｔoff＜α４、の何れか一つ以上の条件を満たしたときを起動完了タイミングｔ１と判定すると良い。 Further, as shown in FIG. 21, the activation completion determination unit 22 may set the timing at which the PWM signal voltage output from the output terminal of the main control unit 10 is detected as the activation completion timing t1. At this time, it is desirable to determine that the activation is completed when the on-period Ton and / and the off-period Toff of the PWM signal voltage satisfy a predetermined predetermined condition. For example, when the upper limit value of the on period Ton of the PWM signal voltage is α3, the lower limit value is β3, the upper limit value of the off period Toff is α4, and the lower limit value is β4, Ton <α3, β3 <Ton, β3 <Ton. When any one or more of <α3, Toff <α4, β4 <Toff, β4 <Toff <α4 is satisfied, it is preferable to determine the start completion timing t1.
　また、起動完了判定部２２は、主制御部１０の出力端子から送信信号ＴＸとして出力される通信バス２で規定されたパルスを用いて主制御部１０が起動完了したか否かを判定しても良い。例えば、図２２に示すように、起動完了判定部２２は、ＬＩＮの通信規格で用いられる通信バス２で規定されるブレークフィールドＢＦ、シンクバイトフィールドＳＢＦを送信信号ＴＸとして検出した場合に、主制御部１０が起動完了したタイミングｔ１と判定しても良い。 Further, the activation completion determination unit 22 determines whether or not the activation completion of the main control unit 10 is completed by using the pulse defined by the communication bus 2 output as the transmission signal TX from the output terminal of the main control unit 10. Is also good. For example, as shown in FIG. 22, when the activation completion determination unit 22 detects the break field BF and the sync byte field SBF defined by the communication bus 2 used in the LIN communication standard as the transmission signal TX, the main control is performed. It may be determined that the timing t1 when the start of the unit 10 is completed.
　また、図１９から図２２を用いて説明した何れかの方法により主制御部１０の出力信号を用いて起動シーケンス実行中と判定したタイミングｔ１から、図１６から図１８を用いて説明した何れかの方法で予め設定された時間を測定し、この時間ｔ０～ｔ１をマージンとして見込んで、主制御部１０が起動完了したと判定するようにしても良い。 Further, any of the methods described with reference to FIGS. 16 to 18 from the timing t1 in which it is determined that the activation sequence is being executed using the output signal of the main control unit 10 by any of the methods described with reference to FIGS. 19 to 22. The time set in advance may be measured by the method of the above, and the time t0 to t1 may be assumed as a margin, and it may be determined that the main control unit 10 has been activated.
　（第１０実施形態）
　第１０実施形態について図２３から図２５を参照して説明する。第１０実施形態は、自己ＩＤ学習部２５及びＩＤ等識別部２６の具体例を説明する。車両に組み込まれる各ＥＣＵは役割分担がなされており、自ノード１ａが応答すべきＩＤは、車両組込時までに主制御部１０の中の不揮発的なメモリ１３に保持される。このため通常動作中、主制御部１０は当該ＩＤを用いて他ノード１ｂ、１ｃと通信できる。一方、副制御部２０においては、自ノード１ａが応答すべきＩＤを不揮発のメモリ等に保持させると、部品のコストや管理のコストが上がってしまうことから、揮発メモリで保持することが望ましく、この場合、メモリ３３の記憶保持情報はＥＣＵへの電源遮断の度にクリアされる。 (10th Embodiment)
The tenth embodiment will be described with reference to FIGS. 23 to 25. The tenth embodiment describes specific examples of the self-ID learning unit 25 and the ID identification unit 26. Each ECU incorporated in the vehicle is divided into roles, and the ID to be responded to by the own node 1a is held in the non-volatile memory 13 in the main control unit 10 by the time the vehicle is incorporated. Therefore, during normal operation, the main control unit 10 can communicate with other nodes 1b and 1c using the ID. On the other hand, in the sub-control unit 20, if the ID to be responded to by the own node 1a is held in a non-volatile memory or the like, the cost of parts and the cost of management increase, so it is desirable to hold the ID in the volatile memory. In this case, the storage holding information of the memory 33 is cleared every time the power to the ECU is cut off.
　副制御部２０は、メモリ３３等に応答すべきＩＤを未設定又は学習不十分な場合、通信バス２に送出されたフレームＦＲに自ノード１ａが応答すべきＩＤを含んでいるか否か判定できない。そこで副制御部２０の自己ＩＤ学習部２５は、通信バス２に送出されたフレームＦＲから自ノード１ａに対するＩＤであることを判断するための情報ビット列を、主制御部１０が通常動作中に送信する送信信号ＴＸを検出することで学習すると良い。 When the ID to be responded to the memory 33 or the like is not set or the learning is insufficient, the sub-control unit 20 cannot determine whether or not the own node 1a includes the ID to be responded to in the frame FR transmitted to the communication bus 2. .. Therefore, the self-ID learning unit 25 of the sub-control unit 20 transmits an information bit string for determining that the ID is for the own node 1a from the frame FR transmitted to the communication bus 2 during the normal operation of the main control unit 10. It is good to learn by detecting the transmission signal TX.
　具体的には、主制御部１０が通常動作中であっても、副制御部２０は図２３に示す処理を実行することで実現できる。以下、ＣＸＰＩ通信に適用した例を説明する。図２３に示すように、副制御部２０は、通信バス２に他ノード１ｂ、１ｃからフレームＦＲが送出されていると判定すると、Ｓ２０において信号有りと判定し、Ｓ２１において自己ＩＤ学習部２５がヘッダＨに含まれるＰＩＤを受信する。 Specifically, even if the main control unit 10 is in normal operation, the sub control unit 20 can be realized by executing the process shown in FIG. 23. Hereinafter, an example applied to CXPI communication will be described. As shown in FIG. 23, when the sub-control unit 20 determines that the frame FR is transmitted from the other nodes 1b and 1c to the communication bus 2, it determines that there is a signal in S20, and the self-ID learning unit 25 in S21 determines that there is a signal. The PID included in the header H is received.
　通常動作中、主制御部１０は、このフレームＦＲを受信しておりヘッダＨに含まれるＩＤを認識している。副制御部２０の自己ＩＤ学習部２５は、Ｓ２２にてヘッダＨにエラーが無いことを条件として、Ｓ２３においてレスポンスＲＥとして主制御部１０から送信される送信信号ＴＸが有るか否かを判定する。 During normal operation, the main control unit 10 receives this frame FR and recognizes the ID included in the header H. The self-ID learning unit 25 of the sub-control unit 20 determines whether or not there is a transmission signal TX transmitted from the main control unit 10 as a response RE in S23, provided that there is no error in the header H in S22. ..
　Ｓ２３において送信信号ＴＸを検出した場合、自己ＩＤ学習部２５は、応答すべきＩＤと判定する。そして、自己ＩＤ学習部２５は、ＩＤの上位から下位のビットを入れ替えた値ＩＤ＿ＩＮＶを計算する。これは、フレームＦＲにおいて、ＩＤがＬＳＢファーストで送出され、ドミナント（０）優位であることから、上位から下位のビットを入れ替えることでＩＤの優先順位に対応する値を計算できるためである。 When the transmission signal TX is detected in S23, the self-ID learning unit 25 determines that the ID should be responded to. Then, the self-ID learning unit 25 calculates the value ID_INV in which the upper to lower bits of the ID are exchanged. This is because the ID is transmitted in the LSB first in the frame FR and is dominant (0), so that the value corresponding to the priority of the ID can be calculated by exchanging the upper to lower bits.
　その後、自己ＩＤ学習部２５は、Ｓ２５においてメモリ３３に記憶されている調停用のＩＤよりも小さい値であるか否かを判定し、小さければ優先順位の高い値ＩＤ＿ＩＮＶとしてメモリ３３に上書きして書換える。これにより、自己ＩＤ学習部２５は、他ノード１ｂ、１ｃとの間で用いる調停用のＩＤを学習できる。 After that, the self-ID learning unit 25 determines whether or not the value is smaller than the arbitration ID stored in the memory 33 in S25, and if it is smaller, overwrites the memory 33 with the value ID_INV having a higher priority. rewrite. As a result, the self-ID learning unit 25 can learn the arbitration ID used with the other nodes 1b and 1c.
　自己ＩＤ学習部２５は、調停に使用可能な値ＩＤ＿ＩＮＶのビット列を学習しメモリ３３に記憶させた後、自ノード１ａのＩＤとして識別するためのビット数Ｎを学習する。具体的には、図２４に例示したように、自己ＩＤ学習部２５は、Ｓ２７においてメモリ３３に記憶済の値ＩＤ＿ＩＮＶをロードした後、Ｓ２８においてＩＤ＿ＩＮＶ－１を計算し、Ｓ２９において値ＩＤ＿ＩＮＶ－１の桁下がりパリティを演算し、値ＩＤ＿ＩＮＶ－１のＭＳＢとして設定する。 The self-ID learning unit 25 learns the bit string of the value ID_INV that can be used for arbitration, stores it in the memory 33, and then learns the number of bits N for identifying as the ID of the own node 1a. Specifically, as illustrated in FIG. 24, the self-ID learning unit 25 loads the stored value ID_INV in the memory 33 in S27, then calculates ID_INV-1 in S28, and calculates the value ID_INV-1 in S29. The carry parity of is calculated and set as the MSB of the value ID_INV-1.
　また、自己ＩＤ学習部２５は、Ｓ３０において値ＩＤ＿ＩＮＶと値ＩＤ＿ＩＮＶ－１と一致する上位Ｎビットを決定しＮを出力する。そして、自己ＩＤ学習部２５は、Ｓ３１における値ＩＤ＿ＩＮＶ－１の上位Ｎビットを、Ｓ３３において上位ビットから下位ビットの順を入れ替えながら出力する。 Further, the self-ID learning unit 25 determines an upper N bit that matches the value ID_INV and the value ID_INV-1 in S30, and outputs N. Then, the self-ID learning unit 25 outputs the upper N bits of the value ID_INV-1 in S31 while changing the order of the upper bits to the lower bits in S33.
　自己ＩＤ学習部２５は、上位Ｎビットを自ノード１ａのＩＤの識別用のビット列として学習できる。また、自己ＩＤ学習部２５は、Ｓ３２における値ＩＤ＿ＩＮＶ－１の下位７－Ｎビットを、Ｓ３４において上位ビットから下位ビットの順を入れ替えながら出力する。この下位７－Ｎビットは、自ノード１ａのＩＤ認識後、調停時に利用されるビットとなる。 The self-ID learning unit 25 can learn the upper N bits as a bit string for identifying the ID of the self-node 1a. Further, the self-ID learning unit 25 outputs the lower 7-N bits of the value ID_INV-1 in S32 while changing the order of the upper bits to the lower bits in S34. The lower 7-N bits become bits used at the time of arbitration after recognizing the ID of the own node 1a.
　このような過程を経て、自己ＩＤ学習部２５は、自ノード１ａのＩＤとして識別するためのビット数Ｎを学習でき、さらに調停する際に利用可能なＮ＋１ビット目以降を学習できる。ＣＸＰＩ通信に適用した例を示したが、それぞれ、自ノード１ａが応答すべきＩＤと、ＩＤ領域でのエラー生成用のビット列の学習方法として、ＬＩＮ通信にも適用できる。 Through such a process, the self-ID learning unit 25 can learn the number of bits N for identifying as the ID of the own node 1a, and can further learn the N + 1th bit and subsequent bits that can be used for arbitration. An example applied to CXPI communication is shown, but each can also be applied to LIN communication as a learning method of an ID to be responded to by the own node 1a and a bit string for error generation in the ID area.
　従来技術においては、車両のグレード、ディーラーオプションなどにより、使用ＥＣＵの種類や個数が変化した場合、予め電源の制御系統を最多の構成でも使用できるように専用のウェイクアップ用のパルス列や電源配線を分類しておく必要があり、個々のＥＣＵでの設定に加え、マスタノードでそれらのウェイクアップや電源を管理する必要が生じる。このため、マスタノードでの処理や配線が煩雑化し、使用ＥＣＵの少ない構成の車両では無駄なコストが生じてしまう問題があった。また、新旧バージョンの構成の異なるＥＣＵが混在した場合や、従来別々の通信バス２に接続されていたＥＣＵが同一の通信バス２に接続されるように変更された場合、グループ分けが困難になるといった問題があった。 In the conventional technology, when the type and number of ECUs used change depending on the grade of the vehicle, dealer options, etc., a dedicated wake-up pulse train and power supply wiring are provided so that the power supply control system can be used in advance even with the largest number of configurations. It is necessary to classify them, and in addition to the settings in each ECU, it is necessary to manage their wakeup and power supply in the master node. For this reason, there is a problem that the processing and wiring in the master node become complicated, and a wasteful cost occurs in a vehicle having a configuration in which the number of ECUs used is small. Further, when ECUs having different configurations of old and new versions are mixed, or when the ECUs conventionally connected to different communication buses 2 are changed to be connected to the same communication bus 2, it becomes difficult to group them. There was a problem such as.
　本実施形態によれば、使用ＥＣＵの種類や個数が変化したり、通信バス２への接続状態が変化したり、新旧バージョンの構成の異なるＥＣＵが混在する場合があっても、自ノード１ａのＩＤを学習する自己ＩＤ学習部２５を設けているため、自己ＩＤ学習部２５がそれぞれの通信ノード１ａ、１ｂ、１ｃに合わせて応答すべきＩＤを学習でき、主制御部１０が起動していない間でも当該主制御部１０の代わりに通信制御を実行できる。これにより上記した分類分け、グループ分けを行う必要がなくなり、個々のＥＣＵでの設定やマスタノードでの処理を必要最小限にすることができる。 According to this embodiment, even if the type and number of ECUs used change, the connection state to the communication bus 2 changes, or ECUs having different configurations of old and new versions may coexist, the own node 1a Since the self-ID learning unit 25 for learning the ID is provided, the self-ID learning unit 25 can learn the ID to be responded to according to each communication node 1a, 1b, 1c, and the main control unit 10 is not activated. Communication control can be executed instead of the main control unit 10 in between. As a result, it is not necessary to perform the above-mentioned classification and grouping, and the setting in each ECU and the processing in the master node can be minimized.
　また図２５は、図４に代わるフローチャートを示しており特徴部分だけ抜粋して示している。図２５に図示していない処理内容は、図４に示す処理内容と同様であるため説明を省略する。 Further, FIG. 25 shows a flowchart that replaces FIG. 4, and only the characteristic parts are excerpted and shown. Since the processing contents not shown in FIG. 25 are the same as the processing contents shown in FIG. 4, the description thereof will be omitted.
　図２５に示すように、ＩＤ等識別部２６は、自ノード１ａに対するＩＤを判断するための情報がメモリ３３に未設定もしくは学習が不十分である場合、他ノード１ｂからフレームＦＲが通信バス２に送出されていても、Ｓ６にてＮＯと判定し応答すべきＩＤでないと判定する。 As shown in FIG. 25, when the information for determining the ID for the own node 1a is not set in the memory 33 or the learning is insufficient, the frame FR from the other node 1b is the communication bus 2 of the ID identification unit 26. Even if it is sent to, it is determined as NO in S6 and it is determined that the ID is not a response.
　ＩＤ等識別部２６は、Ｓ６にて応答すべきＩＤでないと判定したとしても、フレームＦＲのヘッダＨに異常無しと判定し、且つ、自己ＩＤ学習部２５により主制御部１０が受信信号ＲＸに含まれるＩＤに対するレスポンスＲＥを出力していないことを検出した場合、自ノード１ａの起動を必要と判定する。 Even if the ID identification unit 26 determines that the ID should not be responded to in S6, it determines that there is no abnormality in the header H of the frame FR, and the self-ID learning unit 25 causes the main control unit 10 to use the received signal RX. When it is detected that the response RE for the included ID is not output, it is determined that the own node 1a needs to be started.
　ＩＤ等識別部２６により自ノード１ａの起動を必要と判定した場合、副制御部２０は、Ｓ７において起動部としてのウェイクアップ信号送出部２７からウェイクアップパルス信号を主制御部１０に送信することで起動すると良い。電源制御部２１により主制御部１０を起動しても良い。これにより、主制御部１０を起動でき、自己ＩＤ学習部２５は、自ノード１ａの主制御部１０のレスポンスＲＥから応答すべきＩＤを学習できる。 When the ID identification unit 26 determines that the own node 1a needs to be activated, the sub-control unit 20 transmits a wake-up pulse signal from the wake-up signal transmission unit 27 as the activation unit to the main control unit 10 in S7. Start with. The main control unit 10 may be activated by the power supply control unit 21. As a result, the main control unit 10 can be activated, and the self-ID learning unit 25 can learn the ID to be responded to from the response RE of the main control unit 10 of the own node 1a.
　図面中、１ａ～１ｃは通信ノード、このうち、１ａは自ノード、１ｂ、１ｃは他ノードを示す。１０は主制御部、２０は副制御部、２１は起動部としての電源制御部、２３は送信制御部、２６はＩＤ等識別部、ＩＤ途中監視部、ＩＤ監視部を示す。２７は起動部としてのウェイクアップ信号送出部、３１はエラー駆動部としてのトランスミッタ、を示す。 In the drawing, 1a to 1c indicate a communication node, of which 1a indicates a local node, 1b and 1c indicate another node. 10 is a main control unit, 20 is a sub control unit, 21 is a power supply control unit as an activation unit, 23 is a transmission control unit, 26 is an ID identification unit, an ID intermediate monitoring unit, and an ID monitoring unit. Reference numeral 27 indicates a wake-up signal transmission unit as a start-up unit, and 31 indicates a transmitter as an error drive unit.
　本開示は、前述した実施形態に準拠して記述したが、当該実施形態や構造に限定されるものではないと理解される。本開示は、様々な変形例や均等範囲内の変形をも包含する。加えて、様々な組み合わせや形態、さらには、それらに一要素、それ以上、あるいはそれ以下、を含む他の組み合わせや形態をも、本開示の範畴や思想範囲に入るものである。
  Although the present disclosure has been described in accordance with the above-described embodiment, it is understood that the present disclosure is not limited to the embodiment or structure. The present disclosure also includes various variations and variations within a uniform range. In addition, various combinations and forms, as well as other combinations and forms, including one element, more, or less, are within the scope and scope of the present disclosure.

Claims (13)

  1. 　通信バスに接続され前記通信バスに送出されるフレームに含まれるＩＤに基づいて自ノードに関係する通信か否かを識別する機能を備える通信装置であって、
    　通常動作モード及び前記通常動作モードより低消費電力で動作する低消費電力モードを備え、前記低消費電力モードから前記通常動作モードに起動完了した後に他ノードとの間で通信制御可能に構成される主制御部（１０）と、
    　前記主制御部とは別に備えられると共に前記通信バスに送出される前記フレームの検出結果に基づいて前記自ノードに関係するＩＤを含む前記フレームが送出されているか否か識別し、前記自ノードに関係しない場合に前記主制御部を前記低消費電力モードで維持し、前記自ノードに関係する場合に前記主制御部を前記低消費電力モードから起動させると共に、前記主制御部が起動完了するまでの間、前記自ノードに関係する前記フレームの再送を促すように前記主制御部の代わりに通信制御する副制御部（２０）と、
    　を備える通信装置。     A communication device having a function of identifying whether or not communication is related to a local node based on an ID included in a frame connected to the communication bus and transmitted to the communication bus.
    It has a normal operation mode and a low power consumption mode that operates with lower power consumption than the normal operation mode, and is configured to be capable of controlling communication with other nodes after the startup from the low power consumption mode to the normal operation mode is completed. Main control unit (10) and
    It is provided separately from the main control unit, and based on the detection result of the frame transmitted to the communication bus, it is identified whether or not the frame including the ID related to the own node is transmitted to the own node. When it is not related, the main control unit is maintained in the low power consumption mode, and when it is related to the own node, the main control unit is started from the low power consumption mode, and until the main control unit is started up. During, the sub-control unit (20) that controls communication instead of the main control unit so as to prompt the retransmission of the frame related to the own node,
    A communication device equipped with.
  2. 　前記副制御部は、
    　前記主制御部が前記低消費電力モードから起動していないときに、前記主制御部の代わりに前記通信バスに送出されるＩＤを途中まで監視するＩＤ途中監視部（２６）と、
    　前記ＩＤ途中監視部により前記自ノードに関係するＩＤと判断されるときに当該ＩＤを途中から調停勝ちするＩＤに変更して前記通信バスに送出し、前記主制御部が起動完了するまでの時間に対応するカウント値を含むデータ、又は、前記他ノードに対し前記自ノードに関する通信の再送を促すように予め定義したデータを送信する送信制御部（２３）と、
    　を備える請求項１記載の通信装置。     The sub-control unit
    When the main control unit is not activated from the low power consumption mode, the ID intermediate monitoring unit (26) that monitors the ID transmitted to the communication bus in place of the main control unit halfway,
    When the ID intermediate monitoring unit determines that the ID is related to the own node, the ID is changed from the middle to an ID that wins arbitration and sent to the communication bus, and the time until the main control unit completes activation. A transmission control unit (23) for transmitting data including a count value corresponding to the above-mentioned data or data defined in advance so as to prompt the other node to retransmit communication relating to the own node.
    The communication device according to claim 1.
  3. 　前記副制御部は、
    　前記主制御部が前記低消費電力モードから起動完了していないときに、前記主制御部の代わりに前記通信バスに送出されるＩＤを監視するＩＤ監視部（２６）と、
    　前記ＩＤ監視部により前記自ノードに対するＩＤと判断されるときに、前記主制御部が起動完了するまでの時間に対応するカウント値を含むように予め定義されたデータ、又は、前記データに付加する誤り検出符号について故意にエラーを含むように設定されたデータを送信する送信制御部（２３）と、
    　を備える請求項１記載の通信装置。     The sub-control unit
    An ID monitoring unit (26) that monitors an ID sent to the communication bus instead of the main control unit when the main control unit has not completed activation from the low power consumption mode.
    When the ID monitoring unit determines that the ID is for the own node, the data is predetermined to include a count value corresponding to the time until the main control unit completes activation, or is added to the data. A transmission control unit (23) that transmits data that is intentionally set to include an error for an error detection code, and a transmission control unit (23).
    The communication device according to claim 1.
  4. 　前記副制御部は、
    　前記主制御部が前記低消費電力モードから起動完了していないときに、前記主制御部の代わりに前記通信バスに送出されるＩＤを監視するＩＤ監視部（２６）と、
    　前記ＩＤ監視部により前記自ノードに対するＩＤと判断されるときに、ＩＤパリティエラー、又はビットエラー等の所定のエラーを生じるように前記通信バスを駆動するエラー駆動部（３１）と、
    　を備える請求項１記載の通信装置。     The sub-control unit
    An ID monitoring unit (26) that monitors an ID sent to the communication bus instead of the main control unit when the main control unit has not completed activation from the low power consumption mode.
    An error driving unit (31) that drives the communication bus so as to generate a predetermined error such as an ID parity error or a bit error when the ID monitoring unit determines that the ID is for the own node.
    The communication device according to claim 1.
  5. 　前記自ノードに対するＩＤと判断したタイミングから予め設定した時間を経過した場合に前記主制御部が起動完了したと判定する起動完了判定部（２２）を備える請求項１から４の何れか一項に記載の通信装置。 The item according to any one of claims 1 to 4, further comprising an activation completion determination unit (22) for determining that the main control unit has completed activation when a preset time has elapsed from the timing of determining the ID for the own node. The communication device described.
  6. 　前記主制御部が出力する出力信号を用いて前記主制御部が起動完了したか否かを判定する起動完了判定部（２２）を備える請求項１から４の何れか一項に記載の通信装置。 The communication device according to any one of claims 1 to 4, further comprising an activation completion determination unit (22) for determining whether or not the main control unit has been activated by using an output signal output by the main control unit. ..
  7. 　前記主制御部から送信信号として出力される、前記通信バスで規定されたパルスを用いて前記主制御部が起動完了したか否かを判定する起動完了判定部（２２）を備える請求項１から４の何れか一項に記載の通信装置。 From claim 1 comprising a start-up completion determination unit (22) for determining whether or not the main control unit has been started up using a pulse specified by the communication bus, which is output as a transmission signal from the main control unit. The communication device according to any one of 4.
  8. 　前記主制御部の出力信号を用いて前記主制御部が起動シーケンス実行中と判定したタイミングから、予め設定された時間を経過した場合に前記主制御部が起動完了したと判定する起動完了判定部（２２）を備える請求項１から４の何れか一項に記載の通信装置。 A start-up completion determination unit that determines that the main control unit has started when a preset time has elapsed from the timing when the main control unit determines that the start-up sequence is being executed using the output signal of the main control unit. The communication device according to any one of claims 1 to 4, comprising (22).
  9. 　前記通信バスのバスクロック、又は、前記バスクロックを分周したクロックを、前記主制御部が起動開始するタイミングから起動完了タイミングまでの測定に用いる請求項１から８の何れか一項に記載の通信装置。 6. Communication device.
  10. 　前記自ノードに対するＩＤを判断するための情報、及び、前記主制御部が起動完了するまでの間に送信するデータを外部から設定可能にしている請求項１から９の何れか一項に記載の通信装置。 The item according to any one of claims 1 to 9, wherein the information for determining the ID for the own node and the data to be transmitted until the main control unit completes activation can be set from the outside. Communication device.
  11. 　前記副制御部は、
    　前記通信バスに送出された信号から前記自ノードに対する前記ＩＤを判断するための情報を、前記主制御部が通常動作中に送信する送信信号を検出することで学習する自己ＩＤ学習部（２５）を備える請求項１から１０の何れか一項に記載の通信装置。     The sub-control unit
    Self-ID learning unit (25) that learns information for determining the ID for the own node from the signal transmitted to the communication bus by detecting the transmission signal transmitted by the main control unit during normal operation. The communication device according to any one of claims 1 to 10.
  12. 　前記副制御部は、
    　前記自ノードに対するＩＤを判断するための情報が未設定もしくは学習が不十分であり、前記主制御部から前記他ノードに対して応答がなければ、前記主制御部を起動する起動部（２１、２７）を備える請求項１１記載の通信装置。     The sub-control unit
    If the information for determining the ID for the own node is not set or the learning is insufficient and there is no response from the main control unit to the other node, the activation unit (21, 27) The communication device according to claim 11.
  13. 　前記副制御部は、
    　前記主制御部が前記通信バスに送受信するための送信信号及び受信信号の通信線とは別に構成され前記主制御部との間で設定するための設定用通信線（３５）を備え、
    　前記自ノードに対するＩＤと判断するための情報、又は、前記主制御部が起動完了するまでの間に応答するデータを前記主制御部から前記設定用通信線を通じて設定可能とした請求項１から１２の何れか一項に記載の通信装置。
          The sub-control unit
    The main control unit is configured separately from the communication lines of the transmission signal and the reception signal for transmission and reception to the communication bus, and includes a setting communication line (35) for setting with the main control unit.
    Claims 1 to 12 that make it possible to set information for determining an ID for the own node or data that responds until the main control unit completes activation from the main control unit through the setting communication line. The communication device according to any one of the above.
PCT/JP2021/034809 2020-10-09 2021-09-22 Communication device WO2022075064A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005123715A (en) * 2003-10-14 2005-05-12 Fujitsu Ltd Network relay apparatus
JP2013062722A (en) * 2011-09-14 2013-04-04 Denso Corp Communication system and slave node constituting the communication system
JP2013107453A (en) * 2011-11-18 2013-06-06 Denso Corp Failure diagnosis system and diagnosis assist device constituting the same
JP2020167596A (en) * 2019-03-29 2020-10-08 キヤノン株式会社 Information processing device, control method of information processing device, and program

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005123715A (en) * 2003-10-14 2005-05-12 Fujitsu Ltd Network relay apparatus
JP2013062722A (en) * 2011-09-14 2013-04-04 Denso Corp Communication system and slave node constituting the communication system
JP2013107453A (en) * 2011-11-18 2013-06-06 Denso Corp Failure diagnosis system and diagnosis assist device constituting the same
JP2020167596A (en) * 2019-03-29 2020-10-08 キヤノン株式会社 Information processing device, control method of information processing device, and program

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