CN105974911B - Wifi editions EOL tools and the diagnostic method for utilizing the tool - Google Patents
Wifi editions EOL tools and the diagnostic method for utilizing the tool Download PDFInfo
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- CN105974911B CN105974911B CN201610596588.0A CN201610596588A CN105974911B CN 105974911 B CN105974911 B CN 105974911B CN 201610596588 A CN201610596588 A CN 201610596588A CN 105974911 B CN105974911 B CN 105974911B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
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Abstract
The diagnostic method of wifi editions EOL tools and the utilization tool is connected for the diagnosis of information of vehicles and writing with a brush dipped in Chinese ink for program with the self-diagnosable system of vehicle, which includes top control module, communication module, WIFI module and power conversion module；Communication module includes CAN communication module and K communication modules, and communication module diagnoses interface with the OBD of self-diagnosable system respectively and top control module is connected；The input terminal of the power conversion module is connected with vehicle power supply, and the output end of power conversion module is connected with the power end of top control module, and WIFI module is connected by USART with top control module, and top control module is connected by SWD interfaces with host computer.It further include a kind of diagnostic method of the EOL tools using wifi editions.The present invention can ensure the reliability of diagnostic tool to avoid the poor contact caused by onboard interface mechanical failure or the problems such as can not establish connection.
Description
Technical field
The present invention relates to automobile diagnosis technique field, specifically a kind of wifi editions of EOL tools and utilize the tool
Diagnostic method.
Background technology
Commercial car electronic control technology is quickly grown in recent years, and the electronic control unit quantity in commercial car is more and more, such as engine
Electronic control unit (ECU), gear box electrical control unit (TCU), instrument controller (CBCU), abs braking controller, AMT controllers etc.,
These electronic control unit are communicated by way of CAN bus or K lines.
Currently, diagnostic tool is mostly to have harness version, is drawn by II mouthful of OBD and be connected to diagnostic tool after transferring, then by
Diagnostic tool turns USB line beam by serial ports and is connected to host computer.Excessive harness connection increases equipment cost, in addition in order to more
Good diagnoses vehicle electrically controlling unit, generally requires to be monitored in sailing, therefore harness interface is in rough ride
It is easy to appear the situations of poor contact, affect the normal operation of the equipment.
Invention content
The purpose of the present invention is to provide the diagnostic methods of a kind of wifi editions of EOL tools and the utilization tool, for solving
Certainly existing diagnostic tool be have harness version, jolt drive in be susceptible to poor contact the problem of.
The technical scheme adopted by the invention to solve the technical problem is that：Wifi editions EOL tools, for information of vehicles
Diagnosis is write with a brush dipped in Chinese ink with program, is connected with the self-diagnosable system of vehicle, characterized in that including top control module, communication module, WIFI moulds
Block and power conversion module；The communication module includes CAN communication module and K communication modules, communication module respectively with autodiagnosis
The OBD diagnosis interfaces of disconnected system are connected with top control module；The input terminal of the power conversion module is connected with vehicle power supply, electricity
The output end of source conversion module is connected with the power end of top control module, and the WIFI module passes through USART and top control module phase
Even, the top control module is connected by SWD interfaces with host computer, for top control module carried out from host computer program debugging and
Download underlying programs.
Further, top control module includes STM32F405RG chips and its by capacitance C10, capacitance C11, capacitance C13, electricity
Hold the peripheral circuit of C14, resistance R8 and 8MHz crystal oscillator chip Y1 compositions；No. 3 pins of 8MHz crystal oscillator chips Y1 with
The PH0 pins of STM32F405RG chips are connected, one end of capacitance C10 respectively with No. 1 pin of crystal oscillator chip Y1 and No. 4 pins
It is connected, and connects 3.3V voltages, the other end of capacitance C10 is connected with No. 2 pins of crystal oscillator chip Y1 and ground connection is isolated；Resistance R8's
One termination 3.3V voltages, the other end are connected with one end of capacitance C13 and are connected with the NRST pins of STM32F405RG chips, electricity
Hold the other end isolation ground connection of C13；One end of capacitance C14 is connected with the VCAP_1 pins of STM32F405RG chips, capacitance C14
The other end isolation ground connection；One end of capacitance C11 is connected with the VCAP_2 pins of STM32F405RG chips, and capacitance C11's is another
End isolation ground connection；The CAN communication module includes for diagnosing the first CAN communication module of ground and being used to communicate the 2nd CAN logical
Interrogate module；The first CAN communication module includes by TCAN332 chip ICs 2, ACT1210 common-mode filters CMF1, capacitance
The first CAN communication circuit of C3, resistance R2 and PESD2CAN CAN bus ESD protection diodes TVS1 compositions；TCAN332 chips
The PB15 pins of No. 1 pin STM32F405RG chip of IC2 are connected, the PB16 pins of No. 4 pins and STM32F405RG chips
It is connected, No. 2 pins are connected with one end of capacitance C3 and ground connection is isolated, and No. 3 pins are connected with the other end of capacitance C3 and meet 3.3V
Voltage, No. 7 pins and No. 6 pins are connected with No. 1 pin of ACT1210 common-mode filters CMF1 and No. 2 pins respectively, common mode filter
No. 4 pins of wave device CMF1 respectively with No. 1 pin of PESD2CAN CAN bus ESD protection diodes TVS1 and resistance R2 one
End is connected, and No. 3 pins of common-mode filter CMF1 draw with No. 2 of PESD2CAN CAN bus ESD protection diodes TVS1 respectively
Foot is connected with the other end of resistance R2, No. 3 pins isolation ground connection of CAN bus ESD protection diodes TVS1；First CAN communication
No. 6 pins that the DH wiring of circuit diagnoses interface circuit with OBD are connected, No. 14 pins of DL wiring and OBD diagnosis interface circuits
It is connected；
The second CAN communication module includes by TCAN332 chip ICs 3, ACT1210 common-mode filters CMF2, capacitance
The second CAN communication circuit of C9, resistance R5 and PESD2CAN CAN bus ESD protection diodes TVS2 compositions, the first CAN
The circuit structure of communicating circuit is identical as the circuit structure of the second CAN communication circuit；
The K communication modules include the K communications being made of TJA1029 chip ICs 5, resistance R6, resistance R7 and capacitance C12
Circuit；A termination 3.3V voltages of resistance R6, the other end of resistance R6 are connected with No. 2 pins of TJA1029 chip ICs 5,
No. 1 pin of TJA1029 chip ICs 5 is connected with the PA0 pins of STM32F405RG chips, No. 4 pins and STM32F405RG cores
The PA1 pins of piece are connected, and No. 7 pins are connected with one end of resistance R7, the other end of resistance R7 respectively with TJA1029 chip ICs 5
No. 6 pins be connected with one end of capacitance C12, the other end of capacitance C12 be connected with No. 5 pins of TJA1029 chip ICs 5 and every
From ground connection；No. 6 pins of TJA1029 chip ICs 5 are connected with No. 7 pins of OBD interface circuits；
The WIFI module includes ESP_12_E chips and its by capacitance C15, resistance R13, resistance R15 and resistance R16
The peripheral circuit of composition；No. 22 pins of ESP_12_E chips are connected with the PA10 pins of STM32F405RG chips, ESP_12_E
No. 21 pins of chip are connected with the PA9 pins of STM32F405RG chips, one end of resistance R15 and the 18 of ESP_12_E chips
Number pin is connected, another termination 3.3V voltages of resistance R15, one end of resistance R16 and No. 16 pin phases of ESP_12_E chips
Even, the other end of resistance R16 is connected with No. 15 pins of ESP_12_E chips and ground connection is isolated；One end of resistance R13 and ESP_
No. 3 pins of 12_E chips are connected, the other end of resistance R13, No. 1 pin of ESP_12_E chips and No. 8 pins respectively with electricity
The one end for holding C15 is connected, and the other end isolation ground connection of capacitance C15, No. 8 pins of ESP_12_E chips connect 3.3V voltages；
The power conversion module includes by LMR16006YQ3 chip ICs 1, capacitance C1, capacitance C2, capacitance C4, inductance
The power-switching circuit of L1 and zener diode D1 compositions；One end of capacitance C1 and No. 1 pin of LMR16006YQ3 chip ICs 1
Be connected, the cathode of the other end of capacitance C1, No. 6 pins of chip IC 1 and zener diode D1 respectively with one end phase of inductance L1
Even, the anode of zener diode D1, IC1 No. 2 pins are connected and are grounded with one end of capacitance C2 respectively, the other end of capacitance C2
Be connected respectively with No. 5 pins of IC1 and No. 4 pins, the other end of inductance L1, IC1 No. 3 pins and capacitance C4 a termination
3.3V voltages, the other end ground connection of capacitance C4.
Further, 24V vehicle-mounted voltages are converted to 3.3V voltages by the power module.
The diagnostic method of a kind of EOL tools using wifi editions, characterized in that including step in detail below：
Step 1), hardware initialization, WIFI module initialization；
Step 2), top control module judge whether successful connection executes step if successful connection for WIFI module and host computer
It is rapid 3) to operate；
Step 3), host computer and WIFI module establish transparent transmission, and WIFI module simultaneously sends transparent transmission pass signal to top control module；
Step 4) judges the first byte that host computer is sent to top control module, if first byte with " first " be particular value, always
It controls module and CAN is diagnosed according to data initialization；If first byte is with " second " for particular value, top control module is according to data from diagnosis
CAN sends a frame data frame；If first byte is with " third " for particular value, top control module communicates CAN according to data initialization；If
For first byte with " fourth " for particular value, top control module sends a frame data frame according to data from communication CAN；
If top control module is received from diagnosis CAN through the message after screening washer, 8 data of CAN message will be diagnosed
It is sent to host computer by WIFI module；It, will communication if top control module is received from communication CAN through the message after screening washer
8 data of CAN message are sent to host computer by WIFI module；
Step 5) continues to execute step 4), carries out Infinite Cyclic operation.
The beneficial effects of the invention are as follows：WIFI editions tool provided by the invention can not only save production cost, can be with
Greatly save the cost of user (especially vehicle enterprise).This tool can ensure data normal transmission, nothing in 10 meters
Need USB extended lines.And since the wireless network patent of CouncilforScientificandIndustrialResearch O is expired, the price of a set of WIFI module be significantly less than onboard interface with
The price of USB connecting lines.In addition WIFI tools can be to avoid the poor contact caused by onboard interface mechanical failure or can not
The problems such as establishing connection, has ensured the reliability of diagnostic tool.And due to the reduction of interface, but also the processing of shell is more square
Just.
Description of the drawings
Fig. 1 is the modular structure connection figure of the present invention；
Fig. 2 is the SWD interface circuit figures of the present invention；
Fig. 3 is that the OBD of the present invention diagnoses interface circuit figure；
Fig. 4 is the circuit diagram of the top control module of the present invention；
Fig. 5 is the first CAN communication module circuit diagram of the present invention；
Fig. 6 is the second CAN communication module circuit diagram of the present invention；
Fig. 7 is the K communication module circuit diagrams of the present invention；
Fig. 8 is the WIFI module circuit diagram of the present invention；
Fig. 9 is the power conversion module circuit diagram of the present invention；
Figure 10 is the diagnostic flow chart of the present invention.
Specific implementation mode
As shown in Figure 1, wifi editions EOL tools, for the diagnosis of information of vehicles and writing with a brush dipped in Chinese ink for program, the autodiagnosis with vehicle
Disconnected system is connected, including top control module, communication module, WIFI module and power conversion module；The communication module includes CAN
Communication module and K communication modules, communication module diagnoses interface with the OBD of self-diagnosable system respectively and top control module is connected；It is described
The input terminal of power conversion module be connected with vehicle power supply, the output end of power conversion module and the power end phase of top control module
Even, the WIFI module is connected by USART with top control module, as shown in Fig. 2, top control module by SWD interfaces with it is upper
Machine is connected, and carries out program debugging from host computer for top control module and downloads underlying programs.
Fig. 3 is that OBD diagnoses interface circuit, using Plug-8X2 chips.
As shown in figure 4, top control module includes STM32F405RG chips and its by capacitance C10, capacitance C11, capacitance C13, electricity
Hold the peripheral circuit of C14, resistance R8 and 8MHz crystal oscillator chip Y1 compositions.No. 3 pins of 8MHz crystal oscillator chips Y1 with
The PH0 pins of STM32F405RG chips are connected, one end of capacitance C10 respectively with No. 1 pin of crystal oscillator chip Y1 and No. 4 pins
It is connected, and connects 3.3V voltages, the other end of capacitance C10 is connected with No. 2 pins of crystal oscillator chip Y1 and ground connection is isolated.Resistance R8's
One termination 3.3V voltages, the other end are connected with one end of capacitance C13 and are connected with the NRST pins of STM32F405RG chips, electricity
Hold the other end isolation ground connection of C13.One end of capacitance C14 is connected with the VCAP_1 pins of STM32F405RG chips, capacitance C14
The other end isolation ground connection.One end of capacitance C11 is connected with the VCAP_2 pins of STM32F405RG chips, and capacitance C11's is another
End isolation ground connection.CAN communication module includes for diagnosing the first CAN communication module of ground and for communicating the second CAN communication module.
As shown in figure 5, the first CAN communication module include by TCAN332 chip ICs 2, ACT1210 common-mode filters CMF1,
The first CAN communication circuit of capacitance C3, resistance R2 and PESD2CAN CAN bus ESD protection diodes TVS1 compositions.
No. 1 pin of TCAN332 chip ICs 2 is connected with the PB15 pins of STM32F405RG chips, No. 4 pins with
The PB16 pins of STM32F405RG chips are connected, and No. 2 pins are connected with one end of capacitance C3 and ground connection, No. 3 pins and electricity is isolated
The other end for holding C3 is connected and connects 3.3V voltages, No. 7 pins and No. 6 pins No. 1 with ACT1210 common-mode filters CMF1 respectively
Pin and No. 2 pins are connected, No. 4 pins of common-mode filter CMF1 respectively with PESD2CAN CAN bus ESD protection diodes
No. 1 pin of TVS1 is connected with one end of resistance R2, No. 3 pins of common-mode filter CMF1 respectively with PESD2CAN CAN bus
No. 2 pins of ESD protection diodes TVS1 are connected with the other end of resistance R2, No. 3 of CAN bus ESD protection diodes TVS1
Pin isolation ground connection.No. 6 pins that the DH wiring of first CAN communication circuit and OBD diagnose interface circuit are connected, DL wiring and
No. 14 pins that OBD diagnoses interface circuit are connected.
As shown in fig. 6, the second CAN communication module include by TCAN332 chip ICs 3, ACT1210 common-mode filters CMF2,
The second CAN communication circuit of capacitance C9, resistance R5 and PESD2CAN CAN bus ESD protection diodes TVS2 compositions, the 2nd CAN
No. 11 pins that the PH wiring of communicating circuit diagnoses interface circuit with OBD are connected, and PL wiring diagnoses No. 12 of interface circuit with OBD
Pin is connected.The circuit structure of first CAN communication circuit is identical as the circuit structure of the second CAN communication circuit；Herein just no longer
It repeats.
As shown in fig. 7, K communication modules include the K being made of TJA1029 chip ICs 5, resistance R6, resistance R7 and capacitance C12
Communicating circuit.A termination 3.3V voltages of resistance R6, the other end of resistance R6 are connected with No. 2 pins of TJA1029 chip ICs 5,
No. 1 pin of TJA1029 chip ICs 5 is connected with the PA0 pins of STM32F405RG chips, No. 4 pins and STM32F405RG cores
The PA1 pins of piece are connected, and No. 7 pins are connected with one end of resistance R7, the other end of resistance R7 respectively with TJA1029 chip ICs 5
No. 6 pins be connected with one end of capacitance C12, the other end of capacitance C12 be connected with No. 5 pins of TJA1029 chip ICs 5 and every
From ground connection.No. 6 pins of TJA1029 chip ICs 5 are connected with No. 7 pins of OBD interface circuits.
As shown in figure 8, WIFI module includes ESP_12_E chips and its by capacitance C15, resistance R13, resistance R15 and resistance
The peripheral circuit of R16 compositions；No. 22 pins of ESP_12_E chips are connected with the PA10 pins of STM32F405RG chips, ESP_
No. 21 pins of 12_E chips are connected with the PA9 pins of STM32F405RG chips, one end and the ESP_12_E chips of resistance R15
No. 18 pins be connected, another termination 3.3V voltages of resistance R15, one end of resistance R16 is drawn with No. 16 of ESP_12_E chips
Foot is connected, and the other end of resistance R16 is connected with No. 15 pins of ESP_12_E chips and ground connection is isolated.One end of resistance R13 with
No. 3 pins of ESP_12_E chips are connected, the other end of resistance R13, No. 1 pin of ESP_12_E chips and No. 8 pin difference
It is connected with one end of capacitance C15, the other end isolation ground connection of capacitance C15, No. 8 pins of ESP_12_E chips connect 3.3V voltages.
As shown in figure 9, power conversion module include by LMR16006YQ3 chip ICs 1, capacitance C1, capacitance C2, capacitance C4,
The power-switching circuit of inductance L1 and zener diode D1 compositions；One end of capacitance C1 with No. 1 of LMR16006YQ3 chip ICs 1
Pin is connected, the cathode of the other end of capacitance C1, No. 6 pins of chip IC 1 and zener diode D1 respectively with inductance L1 one
End is connected, and the anode of zener diode D1, IC1 No. 2 pins are connected and are grounded with one end of capacitance C2 respectively, and capacitance C2's is another
One end is connected with No. 5 pins of IC1 and No. 4 pins respectively, the other end of inductance L1, IC1 No. 3 pins and capacitance C4 one end
Connect 3.3V voltages, the other end ground connection of capacitance C4.24V vehicle-mounted voltages are converted to 3.3V voltages by power module.
As shown in Figure 10, the diagnostic method of a kind of EOL tools using wifi editions, including step in detail below：
Step 1), hardware initialization, WIFI module initialization；
Step 2), top control module judge whether successful connection executes step if successful connection for WIFI module and host computer
It is rapid 3) to operate；
Step 3), host computer and WIFI module establish transparent transmission, and WIFI module simultaneously sends transparent transmission pass signal to top control module；
Step 4) judges the first byte that host computer is sent to top control module, if first byte with " first " be particular value, always
It controls module and CAN is diagnosed according to data initialization；If first byte is with " second " for particular value, top control module is according to data from diagnosis
CAN sends a frame data frame；If first byte is with " third " for particular value, top control module communicates CAN according to data initialization；If
For first byte with " fourth " for particular value, top control module sends a frame data frame according to data from communication CAN；
If top control module is received from diagnosis CAN through the message after screening washer, 8 data of CAN message will be diagnosed
It is sent to host computer by WIFI module；It, will communication if top control module is received from communication CAN through the message after screening washer
8 data of CAN message are sent to host computer by WIFI module；
Step 5) continues to execute step 4), carries out Infinite Cyclic operation.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, based on the technical solutions of the present invention, those skilled in the art, which need not make the creative labor, to be done
The various modifications or changes gone out are still within protection scope of the present invention.
Claims (3)
1.wifi editions EOL tools are connected for the diagnosis of information of vehicles and writing with a brush dipped in Chinese ink for program with the self-diagnosable system of vehicle,
It is characterized in that including top control module, communication module, WIFI module and power conversion module；The communication module includes CAN logical
Module and K communication modules are interrogated, communication module diagnoses interface with the OBD of self-diagnosable system respectively and top control module is connected；Described
The input terminal of power conversion module is connected with vehicle power supply, the output end of power conversion module and the power end phase of top control module
Even, the WIFI module is connected by USART with top control module, and the top control module passes through SWD interfaces and host computer phase
Even, program debugging is carried out from host computer for top control module and download underlying programs；
Top control module include STM32F405RG chips and its by capacitance C10, capacitance C11, capacitance C13, capacitance C14, resistance R8 and
The peripheral circuit of 8MHz crystal oscillator chips Y1 compositions；The PH0 of the output pins and STM32F405RG chips of 8MHz crystal oscillator chips Y1
Pin is connected, and one end of capacitance C10 is connected with the stand-by pins and VCC pin of crystal oscillator chip Y1 respectively, and connects 3.3V electricity
Pressure, the other end of capacitance C10 are connected with the GND pin of crystal oscillator chip Y1 and ground connection are isolated；A termination 3.3V voltages of resistance R8,
The other end is connected with one end of capacitance C13 and is connected with the NRST pins of STM32F405RG chips, the other end of capacitance C13 every
From ground connection；One end of capacitance C14 is connected with the VCAP_1 pins of STM32F405RG chips, and the other end isolation of capacitance C14 connects
Ground；One end of capacitance C11 is connected with the VCAP_2 pins of STM32F405RG chips, the other end isolation ground connection of capacitance C11；
The CAN communication module includes for diagnosing the first CAN communication module of ground and for communicating the second CAN communication module；
The first CAN communication module includes by TCAN332 chip ICs 2, ACT1210 common-mode filters CMF1, capacitance C3, resistance R2
With the first CAN communication circuit of PESD2CAN CAN bus ESD protection diodes TVS1 compositions；No. 1 of TCAN332 chip ICs 2
Pin is connected with the PB15 pins of STM32F405RG chips, and No. 4 pins are connected with the PB16 pins of STM32F405RG chips, and 2
Number pin is connected with one end of capacitance C3 and is isolated ground connection, and No. 3 pins are connected with the other end of capacitance C3 and connect 3.3V voltages, and 7
Number pin and No. 6 pins are connected with No. 1 pin of ACT1210 common-mode filters CMF1 and No. 2 pins respectively, common-mode filter
No. 4 pins of CMF1 one end phase with No. 1 pin and resistance R2 of PESD2CAN CAN bus ESD protection diodes TVS1 respectively
Even, No. 3 pins of common-mode filter CMF1 respectively with No. 2 pins of PESD2CAN CAN bus ESD protection diodes TVS1 and
The other end of resistance R2 is connected, No. 3 pins isolation ground connection of CAN bus ESD protection diodes TVS1；First CAN communication circuit
No. 6 pins of DH wiring and OBD the Plug-8X2 chips that diagnose interface circuit be connected, DL wiring and OBD diagnosis interface circuits
Plug-8X2 chips No. 14 pins be connected, OBD diagnose interface circuit use Plug-8X2 chips；
The second CAN communication module includes by TCAN332 chip ICs 3, ACT1210 common-mode filters CMF2, capacitance C9, electricity
Hinder the second CAN communication circuit of R5 and PESD2CAN CAN bus ESD protection diodes TVS2 compositions, first CAN communication
The circuit structure of circuit is identical as the circuit structure of the second CAN communication circuit；
The K communication modules include communicating electricity by the K that TJA1029 chip ICs 5, resistance R6, resistance R7 and capacitance C12 are formed
Road；A termination 3.3V voltages of resistance R6, the other end of resistance R6 are connected with No. 2 pins of TJA1029 chip ICs 5, TJA1029
No. 1 pin of chip IC 5 is connected with the PA0 pins of STM32F405RG chips, the PA1 of No. 4 pins and STM32F405RG chips
Pin is connected, and No. 7 pins are connected with one end of resistance R7, and the other end of resistance R7 draws with No. 6 of TJA1029 chip ICs 5 respectively
Foot is connected with one end of capacitance C12, and the other end of capacitance C12 is connected with No. 5 pins of TJA1029 chip ICs 5 and ground connection is isolated；
No. 6 pins of TJA1029 chip ICs 5 are connected with No. 7 pins of OBD interface circuits；
The WIFI module includes ESP_12_E chips and its is made of capacitance C15, resistance R13, resistance R15 and resistance R16
Peripheral circuit；No. 22 pins of ESP_12_E chips are connected with the PA10 pins of STM32F405RG chips, ESP_12_E chips
No. 21 pins be connected with the PA9 pins of STM32F405RG chips, one end of resistance R15 is drawn with No. 18 of ESP_12_E chips
Foot is connected, and another termination 3.3V voltages of resistance R15, one end of resistance R16 is connected with No. 16 pins of ESP_12_E chips, electricity
The other end of resistance R16 is connected with No. 15 pins of ESP_12_E chips and ground connection is isolated；One end of resistance R13 and ESP_12_E cores
No. 3 pins of piece are connected, and the other end of resistance R13, No. 1 pin of ESP_12_E chips and No. 8 pins are respectively with capacitance C15's
One end is connected, and the other end isolation ground connection of capacitance C15, No. 8 pins of ESP_12_E chips connect 3.3V voltages；
The power conversion module include by LMR16006YQ3 chip ICs 1, capacitance C1, capacitance C2, capacitance C4, inductance L1 and
The power-switching circuit of zener diode D1 compositions；One end of capacitance C1 is connected with No. 1 pin of LMR16006YQ3 chip ICs 1,
The cathode of the other end of capacitance C1, No. 6 pins of chip IC 1 and zener diode D1 is connected with one end of inductance L1 respectively, surely
The anode of pressure diode D1, No. 2 pins of IC1 are connected and are grounded with one end of capacitance C2 respectively, the other end difference of capacitance C2
It is connected with No. 5 pins of IC1 and No. 4 pins, a termination 3.3V of the other end of inductance L1, IC1 No. 3 pins and capacitance C4 is electric
Pressure, the other end ground connection of capacitance C4.
2. wifi editions according to claim 1 of EOL tools, characterized in that the power module is by 24V vehicle-mounted voltages
Be converted to 3.3V voltages.
3. a kind of diagnostic method of EOL tools using wifi editions, characterized in that including step in detail below：
Step 1), hardware initialization, WIFI module initialization；
Step 2), top control module judge whether 3) successful connection thens follow the steps if successful connection for WIFI module and host computer
Operation；
Step 3), host computer and WIFI module establish transparent transmission, and WIFI module simultaneously sends transparent transmission pass signal to top control module；
Step 4) judges the first byte that host computer is sent to top control module, if first byte with " first " be particular value, master control mould
Root tuber diagnoses CAN according to data initialization；If first byte is with " second " for particular value, top control module is sent out according to data from diagnosis CAN
Send a frame data frame；If first byte is with " third " for particular value, top control module communicates CAN according to data initialization；If lead-in
For section with " fourth " for particular value, top control module sends a frame data frame according to data from communication CAN；
If top control module is received from diagnosis CAN through the message after screening washer, 8 data for diagnosing CAN message are passed through
WIFI module is sent to host computer；If top control module is received from communication CAN through the message after screening washer, CAN will be communicated
8 data of message are sent to host computer by WIFI module；
Step 5) continues to execute step 4), carries out Infinite Cyclic operation.
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| CN201610596588.0A CN105974911B (en) | 2016-07-26 | 2016-07-26 | Wifi editions EOL tools and the diagnostic method for utilizing the tool |
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| CN201610596588.0A CN105974911B (en) | 2016-07-26 | 2016-07-26 | Wifi editions EOL tools and the diagnostic method for utilizing the tool |
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| CN105974911B true CN105974911B (en) | 2018-10-26 |
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|---|---|---|---|---|
| CN106338986B (en) * | 2016-10-27 | 2019-05-07 | 武汉奥泽电子有限公司 | Multimachine based on high frequency communications writes with a brush dipped in Chinese ink the method and system of program |
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