CN101098345A - Communication interface and communication method for network household electrical appliance - Google Patents
Communication interface and communication method for network household electrical appliance Download PDFInfo
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Abstract
The invention discloses a communication interface of network household electrical appliance, wherein the communication interface is connected with network household electrical appliance and an independent communication module, the communication interface is connected via four lines, via asynchronous serial half-duplex communication to complete data communication, the connecting lines of four-line connection comprise a signal receiving line, signal sending line, an earth line, and a power line. The invention also discloses a relative communication method for transmitting control command from communication module to network household electrical appliance, comprising that (121), the communication module sends a control frame to the network household electrical appliance, (122), the communication module judges if receives a feedback frame of the network household electrical appliance, if receives, ending the communication, or not receives after waiting for preset maximum waiting time T1, entering into step (121). The invention also discloses a method for using network household electrical appliance to send report message to the communication module.
Description
Technical field
The present invention relates to household appliance technical field, relate in particular to a kind of communication interface of network home appliance.The present invention provides a kind of means of communication of network home appliance simultaneously.
Background technology
Network home appliance be meant have on network level that information is interconnected, intercommunication or the home network of interoperability feature and the electric equipment products that similar site's network uses.So-called home network, be meant that fusion Control Network and multimedia network information are in one, in home-ranges, realize information equipment, communication apparatus, amusement equipment, household electrical appliance, automation equipment, lighting apparatus, security personnel's (monitoring) device and water, electricity and gas hotlist (three tables three are anti-), family seek help devices interconnect, management and information sharing such as warning, health care or with the interconnected of family external network and the household's IT application platform managed.Network home appliance equipment and domestic network system are formed network household appliance system jointly, and this system couples together network home appliance by procotol, make it can finish the function of network control and information exchange.
In network household appliance system, each network home appliance communication mutually is a prerequisite of forming this network, and therefore, network home appliance need have external communication unit.In network home appliance, can adopt the mode of the formula that becomes one between its communication unit and its main control unit, also can adopt with the independently special-purpose mutually communication module of main control unit and realize network communication.
When adopting independent communication module, communication module separates with the household electrical appliances main control unit.Under this mode, household electrical appliances can be unified to make, and dispose different communication modules according to the different situations of home network.
Mode for the independent communication module of above-mentioned employing, this independent communication module need be connected by interface with the household electrical appliances main control unit, prior art is not provided for the unified interface between the main control unit of the independent communication module of network home appliance and network home appliance, when therefore selecting communication module, not only to consider the situation of home network, also need to consider the situation of network home appliance, promptly need to select different communication modules according to the difference of main control unit.Above-mentioned condition impacts the versatility of communication module.
Summary of the invention
For the communication module that makes network home appliance can have versatility, the invention provides a kind of communication interface of network home appliance, this interface is used to connect network home appliance and independent communication module, and the independent communication module that is used in network home appliance has versatility for different network home appliances.
The invention provides a kind of communication interface of network home appliance equipment, this communication interface connects network home appliance and independent communication module, this communication interface adopts 4 line systems to connect, finish data communication in asynchronous serial half duplex communication mode, the connecting line that described 4 line systems connect comprises that specifically signal receives line, signal sends line, ground wire, power line.
Preferably, the connecting line that described 4 line systems connect is followed successively by signal in network home appliance one side line preface and receives line, signal transmission line, ground wire, power line; Line preface in communication module one side then corresponds to signal transmission line successively, signal receives line, ground wire, power line.
Preferably, the communication interface that described 4 line systems connect comprises the communication plug terminal of reserving on automatically controlled plate of network home appliance and the described independent communication module, this plug terminal can directly patch each other to cooperate and form described 4 line systems connection, also can connect above-mentioned plug terminal by 4 line connecting lines, the two ends of this 4 line connecting line have the plug terminal that can cooperatively interact with plug terminal with the communication on independent communication module and the automatically controlled plate of network home appliance respectively.
Preferably, the communication of reserving on described independent communication module and the automatically controlled plate of network home appliance has groove shape bayonet arrangement with plug terminal.
Preferably, the communication frames that communication is adopted between described communication module and the described network home appliance comprises successively: length is the frame head territory of 2 bytes, is used to show the beginning of a frame; Expression comprises the frame length territory of byte number of the entire frame length in frame type territory, data type territory, effective information territory and verification and territory, and the frame length length of field is 1 byte, and its span is the 2-252 byte; Take 2 bits, the frame type territory of the function type of definition frame; Take 6 bits, the data type territory of the function of definition frame data; Length is the effective information territory of 0～250 byte; Take the verification and the territory of 1 byte, its content be by frame length, frame type, data type and effective information by the resulting verification of byte addition and.
Preferably, described communication frames comprises communication command frame and two kinds of function types of communication management frame.
Preferably, described communication command frame comprises the frame with following function:
Control frame, this Frame sends to network home appliance by communication module, and its data are control command; When network home appliance needed Be Controlled, communication module is transmission control frame as required, up to receiving status frames or the invalid frame that network home appliance returns; If communication module is not received status frames or invalid frame, then repeat the transmission control frame several times at a certain time interval, do not receive the information that network home appliance returns yet, then judge communication abnormality between network home appliance and the communication module;
Status frames, this Frame sends to communication module by network home appliance, its data are the state of network home appliance, after network home appliance receives described control frame, type and effective information according to this control frame are provided with and corresponding action network home appliance, and the current state of the household electrical appliances after will being provided with is according to the packing of the form of this status frames and send in the time that limits;
The fault alarm frame if network home appliance is when having warning message, then sends to described communication module with this warning message with the form of fault alarm frame;
Report frame, this Frame sends to communication module by household electrical appliances, is used for network home appliance and sends information to communication module, and household electrical appliances repeat to send according to certain time interval reports frame, up to the acknowledgement frame of receiving that communication module sends.
Preferably, described communication command frame also comprises invalid frame, after network home appliance is received control frame, if the control command information in this control frame can't be carried out or the control logic mistake, then sends this invalid frame.
Preferably, described communication command frame also comprises acknowledgement frame, and this Frame sends to network home appliance by communication module, is used to state publications frame and the fault alarm frame of confirming that communication module receives that network home appliance initiatively sends.
Preferably, described communication command frame also comprises and stops the fault alarm frame, after upper layer device or Control Node are received the warning message that communication module transmits, then send and stop alarm command to household electrical appliances, after described communication module is received and is stopped alarm command, stop the fault alarm frame to described network home appliance transmission, after network home appliance is received this Frame, then no longer send the identical fault alarm frame of content to communication module.
Preferably, described communication management frame comprises the frame with following function:
Fetch equipment identify label ID command frame, communication module sends this fetch equipment identify label command frame to network home appliance, is used to read the equipment identities sign of network home appliance;
Equipment identities sign ID acknowledgement frame, after being used for network home appliance and receiving described fetch equipment identify label command frame, network home appliance indicates self equipment identities and number adopts this acknowledgement frame to send to communication module;
The link test command frame, whether the communication that is used to test household electrical appliances is working properly; Communication module is according to the instruction of home network Control Node, send the link test command frame to network home appliance, return link was tested acknowledgement frame after network home appliance correctly received this order, communication module receives the link test acknowledgement frame and thinks that then link is intact between household electrical appliances and the communication module, if communication module can not correctly receive in official hour and reply, communication module is then thought link failure between network home appliance and the communication module;
The link test acknowledgement frame is used for the link test command frame that communication module sends is replied;
Fetch equipment communication speed frame is used for the work of new network home appliance equipment when initial, the command frame that is sent to network home appliance by communication module; Communication module adopts 9600bps speed to send order earlier; Reply as not obtaining, use 4800bps instead and send once more; Reply as obtaining not yet, use 2400bps instead and send once more;
The communication speed acknowledgement frame is used to reply described fetch equipment communication speed acknowledgement frame, and its effective information territory comprises a byte, and this byte content is " 1 ", and then communication speed is 9600bps; This byte content is " 2 ", and then communication speed is 4800bps; This byte content is " 3 ", and then communication speed is 2400bps.
The present invention provides a kind of means of communication that are used for above-mentioned network household electric equipment communication interface simultaneously, and these means of communication are used to realize that communication module to the network home appliance transfer control instruction, comprising:
121) the communication module transmission control frame is to network home appliance equipment;
122) communication module judges whether to receive the frame that returns of network home appliance; If receive, then communication finishes; Do not receive yet if wait for the maximum latency T1 of regulation, then return step 121).
Preferably, described step 122) when middle judged result is returned frame for not receiving, judge the number of times of transmission control frame earlier, if surpass the number of times of regulation, then judge communication abnormality, and stop transmission control frame; If do not surpass the number of times of regulation, then return step 121).
Preferably, the frame that returns described step 122) is status frames or invalid frame.
The present invention also provides a kind of means of communication that are used for above-mentioned network household electric equipment communication interface, and these means of communication are used to realize that network home appliance sends report information to communication module, comprising:
151) network home appliance sends to communication module and reports frame;
152) network home appliance judges whether to receive the acknowledgement frame that communication module sends; If receive, then communication process finishes; Do not receive yet if wait for the maximum latency T2 of regulation, then return step 151).
Preferably, described step 152) in, when judging the acknowledgement frame that does not receive the communication module transmission, the number of times that has sent the report frame is judged by elder generation, if above the number of times of stipulating, then judge communication abnormality, and stops to send the report frame; If do not surpass the number of times of regulation, then return step 151).
The present invention also provides a kind of means of communication that are used for above-mentioned network household electric equipment communication interface, and these means of communication are used to realize that network home appliance sends warning message to communication module, comprising:
171) network home appliance sends the fault alarm frame to communication module;
172) network home appliance judges whether to receive the acknowledgement frame that communication module sends; If receive, then stop to send the fault alarm frame; Do not receive yet if wait for the maximum latency T3 of regulation, then return step 171).
Preferably, described step 172) in, if receive the acknowledgement frame that described communication module sends, then also carry out the following step after this step:
173) wait for set time T4;
174) judge whether to receive and stop the alarm command frame; If do not receive, then return step 171).
Preferably, the described alarm command frame that stops is by the stop alarm command of communication module according to the transmission of the Control Node in the home network, is sent to network home appliance by communication module.
Interface between network home appliance provided by the invention and the independent communication module has following advantage:
1, guaranteed the versatility of independent communication module with respect to network home appliance.
The communication interface of network home appliance provided by the invention provides the unified platform that is connected for network home appliance and independent communication module, when this platform is diverse network household electrical appliances and the employing of independent communication module, just can making independently, the relative diverse network household electrical appliances of communication module have versatility, need not consider the connectivity problem between communication module and the network home appliance when making the user select communication module, only need to select communication module to get final product according to the situation of home network.Therefore, technical scheme provided by the invention has increased the versatility of the independent communication module that is used for network home appliance.
2, a kind of reliable technique scheme that provides that is connected between network home appliance and the independent communication module is provided network interface provided by the invention.
Network home appliance communication interface provided by the invention, the characteristics of network home appliance and separable communication module have been taken into full account, based on the UART mouth of accepting extensively, designed simple and clear, reliable communications protocol, can realize the communication between communication module and the network home appliance preferably.Therefore, the present invention provides a kind of reliable technique scheme for the communication between network home appliance and the independent communication module.
Description of drawings
Fig. 1 is the hardware structure diagram of first embodiment of the invention;
Fig. 2 is the signaling process figure of the control frame work of first embodiment of the invention;
Fig. 3 is the signaling process figure of the report frame of first embodiment of the invention;
Fig. 4 is the signaling process figure that network home appliance of the present invention carries out fault alarm;
Fig. 5 is the signaling process figure of general work of the communication management frame of first embodiment of the invention;
Fig. 6 is that the first embodiment of the invention communication module need be when the network home appliance transfer control instruction, the flow chart of the means of communication of employing;
Fig. 7 is the first embodiment of the invention network home appliance sends a method flow diagram from report information to communication module;
Fig. 8 is the first embodiment of the invention network home appliance sends a method flow diagram from warning message to communication module.
Embodiment
Below the explanation a kind of separable communication module that provides of first embodiment of the invention and the communication interface of network home appliance.The communication frames form that this communication interface comprises hardware connection mode and realizes mutual communication.Below illustrated respectively.
This communication interface is to serve as the communication of basis realization communication module and network home appliance with universal asynchronous serial port (UART mouth).Because universal asynchronous serial port obtains the extensive support of various household electrical appliances control boards, therefore, this kind communication interface is easy to obtain the support of network home appliance.This communication interface is at the communication frames form that hardware connection mode more specifically further is provided on the basis of universal asynchronous serial port and is fit to finish communication task between network home appliance and the independent communication module.
Please, be the hardware structure diagram of first embodiment of the invention referring to Fig. 1.This illustrates the splicing ear of this communication interface.
This communication interface connects network home appliance and independent communication module, and described independent communication module is used for realizing the communication of this network home appliance and other household electrical appliances of appliance network, makes this network home appliance and home network realize being connected.
This communication interface adopts 4 line systems to connect and asynchronous serial half duplex communication mode realizes that described network home appliance is connected with the communication of independent communication module; The connecting line that described 4 line systems connect comprises that specifically signal receives line, signal sends line, ground wire, power line.Power supply uses 4.5～5.5VDC, and the communication module electric current is 20～50mA.
As shown in Figure 1, this communication interface comprises the plug terminal that the communication reserved on automatically controlled plate of network home appliance and the described independent communication module is used.The cooperation of can directly pegging graft of both plug terminals forms described four-wire system and connects; Also can connect above-mentioned plug terminal by 4 line connecting lines, these 4 line connecting line two ends have plug terminal, and plug terminal can cooperatively interact with the communication plug terminal on communication module and the automatically controlled plate of household electrical appliances.Described plug terminal is meant and obtains the plug terminal form that the general networking household electrical appliances are supported that this plug terminal meets the certain structure requirement.In this plug terminal, having four terminals corresponding to 4 line system connected modes, is signal receiving end 11 (RX), signal sending end 12 (TX), ground wire terminal 13 (VSS), power line terminal 14 (VCC) from network home appliance one side successively.Corresponding, be respectively signal sending end, signal receiving end, ground wire terminal, power line terminal in communication module one side.Distance is 2.5mm between each terminal.The communication of reserving on described independent communication module and the automatically controlled plate of network home appliance has groove shape bayonet arrangement with plug terminal.The terminal of described communication module is positive socket; The corresponding terminal of described network home appliance is cloudy socket.Above-mentioned socket also can adopt other forms, and for example, the terminal of described communication module adopts cloudy socket; The corresponding terminal of described network home appliance is positive socket.Using under the situation of connection, also can communication module and the terminal of network home appliance all adopt positive socket or cloudy socket, and have corresponding cloudy socket and positive socket on the described connection terminal.
Be fixing described communication module, this communication module is installed in the special-purpose mold box, and mold box adopts makrolon material, and communication module can make and be screwed in network home appliance.
Below introduce under this communication interface the data transfer mode between communication module and the network home appliance.
The asynchronous serial communication mode is adopted in communication between communication module and the control class network home appliance, communication baud rate can be at 2400bps, select in the message transmission rate such as 4800bps or 9600bps, wherein 9600bps is the default data transmission rate, transfer of data adopts 1 start bit, 1 position of rest, no parity check, half-duplex mode.
Adopt specific communications protocol to realize mutual communication between described communication module and the network home appliance, wherein, the communication frames form between this communication module and the network home appliance is as shown in the table:
| Frame head (2 byte) | Frame length (1 byte) | Frame type (2) | Data type (6) | Effective information (0-250 byte) | Verification and (1 byte) |
Table 1
Below introduce each data field in the communication frames form of going up the described communications protocol of table.
(1) frame head territory: the beginning of a frame of this domain representation, frame head length are 2 bytes.
(2) frame length territory: the content representation in this territory comprises the byte number of the entire frame length in frame type territory, data type territory, effective information territory and verification and territory, and the frame length length of field is 1 byte, and its span is the 2-252 byte.
(3) frame type territory: this territory takies 2 bits, is used for the function of definition frame, and particular content is seen below continuous table 2.
(4) data type territory: this territory takies 6 bits, is used for the function of definition frame data, and particular content is seen below continuous table 2.
(5) effective information territory: this territory is used to be transmitted as the needed information of Control Network household electrical appliances, and for realizing the control of network home appliance is needed the outwards data of transmission, and the effective information length in this territory is 0～250 byte.Concrete effective information content comprises control command, parameter information, state information, fault alarm information etc.
(6) verification and territory: this territory be used for transmitting by frame length, frame type, data type and effective information by the resulting verification of byte addition and.The content in this verification and territory is used for the transmission correctness of Frame is carried out verification.
The defined content in above-mentioned frame type territory and data type territory can determine the flow direction and the content of being transmitted and the corresponding form of the data of frame.Concrete corresponding content as shown in the following Table 2.
| The frame explanation | Frame format | ||
| Frame type | Data type and data flow | Frame type+data type | Effective information |
| 00: the communication command frame | 000001: control frame, communication module-＞household electrical appliances | 01H | XXXX |
| 000010: status frames, household electrical appliances-＞communication module | 02H | XXXX | |
| 000011: invalid (failure) frame, household electrical appliances-＞communication module | 03H | XXXX | |
| 000100: the fault alarm frame, household electrical appliances-＞communication module | 04H | XXXX | |
| 000101: confirm (ACK) frame, communication module-＞household electrical appliances | 05H | Do not have | |
| 000110: report frame, household electrical appliances-＞communication module | 06H | XXXX | |
| 001001: stop the fault alarm frame, communication module-＞household electrical appliances | 09H | Do not have | |
| Follow-up reservation is used for expansion | |||
| 01: the communication management frame | 000001: fetch equipment identify label ID command frame, communication module-＞household electrical appliances | 41H | 4944H |
| 000010: equipment identities sign ID acknowledgement frame, household electrical appliances-＞communication module | 42H | 8bytesID | |
| 000011: the link test command frame, communication module-＞household electrical appliances | 43H | Do not have | |
| 000100: the link test acknowledgement frame, household electrical appliances-＞communication module | 44H | Do not have | |
| 000101: fetch equipment communication speed frame, communication module-＞household electrical appliances | 45H | Do not have | |
| 000110: the communication speed acknowledgement frame, household electrical appliances-＞communication module | 46H | 01 representative: 9600bps, 02 representative: 4800bps, 03 representative: 2400bps | |
| Follow-up reservation is used for expansion |
Annotate: " XXXX " expression non-user-specific data
Table 2
According to the form of above-mentioned communication frames, the data between network home appliance and the connected communication module can realize the active data transmission.Owing to adopt wired connection between communication module and the network home appliance, so the communication error rate is lower, adopts above-mentioned communication frames form just can realize data communication preferably.
Be described in further detail the effect and the transmission course of each communication frames below in conjunction with table 2.
The communication command frame is a main frame type of realizing communication between network home appliance and the communication module, and its frame type number is " 00 ", specifically comprises control frame, status frames, invalid frame, fault alarm frame, acknowledgement frame, report frame and stops the fault alarm frame.
Below the concrete communication process of the various communication frames under this frame type is described.
Please referring to Fig. 2, this illustrates the signaling process of control frame work.Communication module receives from after the home network control information that equipment or Control Node send at the middle and upper levels, this control information is sent to network home appliance (particularly being the automatically controlled plate of network home appliance) with the form of control frame, after network home appliance receives control frame, judge whether to be correct control frame, if then the automatically controlled plate of household electrical appliances is carried out this order and execution result is sent to communication module with the form of status frames, if the control frame of receiving can't be carried out or the control logic mistake, then network home appliance sends invalid frame to communication module.Fig. 2 illustrates the course of work of above-mentioned control frame.
After network home appliance receives correct control frame, household electrical appliances are provided with and corresponding action, and the current state of the household electrical appliances after will being provided with sends to communication module by the packing of status frames form in the time that limits.Communication module is not received status frames or invalid frame after certain time interval, then retransmit control frame, does not receive status frames yet after several times, then judges communication abnormality between household electrical appliances and the module.
Please referring to Fig. 3, this illustrates the signaling process of reporting frame.When household electrical appliances have information to send to communication module,, send to communication module according to reporting frame format reporting information package.After communication module receives the report frame, in the time that limits, send acknowledgement frame.Network home appliance repeats to send according to certain time interval reports frame, up to receiving that communication module sends acknowledgement frame.
Please referring to Fig. 4, this illustrates the signaling process that network home appliance carries out fault alarm.When household electrical appliances have warning message to send to communication module, according to the fault alarm frame format warning message is packed, and send to communication module.After communication module receives the fault alarm frame, in the time that limits, send acknowledgement frame to network home appliance.Network home appliance does not receive the confirmation frame within a certain period of time, will repeat to send the fault alarm frame.In a period of time after receiving acknowledgement frame, do not stop the alarm command frame if receive, then network home appliance restarts to send the fault alarm frame.
After Control Node or upper layer network equipment are received the warning message of household electrical appliances, assign the order that stops to report to the police to home appliance.Described communication module receives after this stops alarm command, should order packing to form the frame that stops to report to the police and sending to network home appliance, and network home appliance receives that communication module sends stops to report to the police behind the frame, no longer sends identical warning message to Control Node.
Except that above frame type, this communication interface also has the frame type of communication management frame, and its effect is that communication process is managed, and belongs to complementary communication frames.Specifically comprise communication management frame (narrow sense) and corresponding communication management acknowledgement frame in the communication frames of the type.Fetch equipment ID command frame, link test command frame, fetch equipment communication speed frame etc. belong to communication management frame (narrow sense) in the table 2; With the corresponding respectively communication management acknowledgement frame of above Frame be device id acknowledgement frame, link test acknowledgement frame, communication speed acknowledgement frame.
Please referring to Fig. 5, this illustrates the signaling process of the general work of communication management frame (frame type is masked as " 01 ").As can be seen from Figure 5, the course of work of this communication management frame is at first to send the communication management frame by communication module, send corresponding communication management acknowledgement frame by described network home appliance according to this communication management frame, thereby realize the transmission of communication management data between communication module and the network home appliance.Relation between the Control Node (also can be the upper level network equipment) in communication module and the home network also is shown among the figure.The communication management frame usually, described Control Node at first sends a command to communication module, controls this communication module and sends the communication management frame; After described communication module receives the communication management acknowledgement frame, be translated into suitable form according to its content and send to described home network Control Node.The technical program provides only is communication interface between communication module and the network home appliance, how to transmit the scope that data do not belong to this communication interface between communication module and the home network node, therefore, communication modes between communication module and the Control Node, the communication frames form that is for example adopted etc. may be different with the communication frames form that this interface provides.
Below the concrete data type frame of communication management frame is described respectively.
The effect of fetch equipment ID (identify label) number command frame in the communication management frame and one group of communication frames of device id (identify label) number acknowledgement frame is, obtain ID number of network home appliance equipment, so as network home appliance in joining home network the time as unique identify label of networking.
The course of work of above-mentioned one group of communication management frame is as follows: at first, when network home appliance equipment has just powered on or when joining in the home network as a new equipment, communication module sends fetch equipment ID command frame to network home appliance.This command frame is 2 bytes to the effective information that network home appliance sends, and its content is " 4944H ".After network home appliance receives this fetch equipment ID command frame, equipment identities sign (ID) number employing device id acknowledgement frame of self is sent to this communication module, the effective information that specifically returns is decided according to each producer, each network home appliance equipment all have one with its unique corresponding identify label number.
In order to ensure the working condition of communication link, also comprise link test command frame and link corresponding test acknowledgement frame in the communication management frame.
Whether described link test command frame is used to test the communication of household electrical appliances working properly.Communication module is according to the instruction of home network Control Node, send the link test command frame to network home appliance, return link was tested acknowledgement frame after network home appliance correctly received this order, communication module receives this link test acknowledgement frame and thinks that then link is intact between household electrical appliances and the communication module, if communication module can not correctly receive in official hour and reply, communication module is then thought link failure between network home appliance and the communication module.
In order to obtain the communication speed of described network home appliance, the communication management frame also has fetch equipment communication speed frame and communication speed acknowledgement frame.
When the work that described fetch equipment communication speed frame is new network home appliance equipment is initial, when communication module is not known the communication speed of network home appliance communication interface, if the command frame that is sent to network home appliance by communication module is communication module known communication speed then need not use this order.Before not obtaining the communication speed of network home appliance, at first default use 9600bps sends order, as not replying, then uses 4800bps to send order once more, as still not replying, then uses 2400bps to send order once more.This command frame does not contain effective information when household electrical appliances send, household electrical appliances contain the effective information of a byte when communication module returns---the speed code.When the speed code was 1, representing the network home appliance communication speed was 9600bps; When the communication speed code was 2, representing communication speed was 4800bps, and when the communication speed code was 3, representing communication speed was 2400bps.
Network home appliance is the home appliance with external network communication interface, the mode that the network home appliance that this paper relates to adopts communication module to separate with the household electrical appliances control board, household electrical appliances can be unified to make, can dispose communication module as required as for being connected on which kind of network, thereby the versatility and the replaceability of household electrical appliances have been increased, secondly, the simplicity of household electrical appliances itself requires network interface simple and practical, therefore, the communication interface that present embodiment provides adopts universal asynchronous serial interface (UART) to be the basis, as the general-purpose interface of network home appliance control board, and communication format and communication flow carried out standard, thereby obtain the good communication effect.This communication interface is particularly useful for controlling the network communication of class household electrical appliances.
This communication interface only is used between communication module and the network home appliance, and the communication interface that adopts between communication module and the Control Node should be decided on the situation of home network.
According to the various communication frames that above-mentioned communication interface provides, this communication interface can carry out communication between communication module and the network home appliance by following several method.
Please referring to Fig. 6, this illustrates communication module need be when the network home appliance transfer control instruction, the means of communication of employing.
Step S601, the communication module transmission control frame is to network home appliance equipment.
Effective information territory in the described control frame comprises control command, is used for sending control command to network home appliance.This control command is to be sent by Control Node in the home network or upper level equipment, and is received by described communication module.The form of the control command that above-mentioned Control Node is sent is by the characteristic decision of home network, and communication module is packaged as the control frame that meets above-mentioned communication interface requirement after this control command can being transformed.
Step S602, communication module judge whether to receive the frame that returns of network home appliance; If receive, then enter step S606; Still do not receive if wait for the maximum latency T1 of regulation, then enter step S603.
Communication module receive above-mentioned return frame after, illustrate that then the communication between this communication module and the network home appliance finishes.Described time T 1 is the maximum latency of a regulation, behind the stand-by period T1, does not return frame if communication module is still received, illustrates that then control frame is not normally received, and need be for further processing.The described frame that returns both can be a status frames, also can be invalid frame.In fact, after communication module receives status frames or invalid frame, also need further to carry out communication, but this a part of communication process does not belong to the scope that communication interface comprised that present embodiment provides, and does not do narration at this with Control Node.
Step S603 judges whether the number of times that control frame sends has surpassed the number of times of stipulating; If then enter step S604; If not, then return step S601.
The control frame contingency that may cause owing to the reason of chances such as external disturbance fail correct the transmission, need to repeat the transmission control frame several times, so that realize the correct transmission of control frame.When several times send all failures, then no longer continue to repeat to send.
Step S604 judges communication abnormality.
When communication module repeated several times transmission control frame all fails, judge communication abnormality to occur, no longer repeat transmission control frame.The judgement of this communication abnormality can send to Control Node or upper level equipment by communication module, is handled accordingly by Control Node or upper level equipment.Said process does not belong to the transmission course of the communication interface that present embodiment provides, and does not repeat them here.
Step S605, communication process finishes.
This communication process finishes only to be meant that the communication process this time between network home appliance and the communication module finishes, and in fact, communication module may need the result who will obtain to send to the Control Node or the upper level network equipment, repeats no more herein.
Please referring to Fig. 7, this illustrates network home appliance sends method from report information to communication module.
Step S701, network home appliance send to communication module and report frame.
Above-mentioned report frame is that network home appliance needs initiatively to send when Control Node or the upper level network equipment send relevant self message, and the particular content of this communication frames is according to the needs decision of network home appliance.The form of the report frame in the communication interface that network home appliance employing present embodiment provides sends this message to communication module, and communication module adopts the required form of home network to transmit this content to the Control Node or the upper level network equipment according to reporting the message that comprises in the frame again.Present embodiment only relates to network home appliance and transmits the process of reporting frame to communication module.
Step S702, network home appliance judge whether to receive the acknowledgement frame that communication module sends; If receive, then enter step S705; Do not receive yet if wait for the maximum latency T2 of regulation, then enter step S703.
Step S703 judges to have sent the number of times of reporting frame, if surpass the number of times of regulation, then enters step S704; If do not surpass the number of times of regulation, then return step S701.
Step S704 judges communication abnormality.
Step S705, this communication finishes.
Please referring to Fig. 8, this illustrates network home appliance sends method from warning message to communication module.
Step S801, network home appliance sends the fault alarm frame to communication module.
When network home appliance broke down the needs warning, the frame format according to above-mentioned interface provides formed the fault alarm frame with the warning message packing, and sends to communication module.
Step S802, network home appliance judge whether to receive the acknowledgement frame that communication module sends; If receive, then enter step S803; Do not receive yet if wait for the maximum latency T3 of regulation, then return step S801.
When communication module receives the fault alarm frame of network home appliance transmission, return acknowledgement frame to confirm to receive above-mentioned fault alarm frame to network home appliance.Network home appliance judges whether should repeat to send above-mentioned fault alarm frame according to this acknowledgement frame.
Step S803 waits for set time T3.
This set time T3 is used for wait and stops the alarm command frame.
Step S804 judges whether to receive to stop the alarm command frame; If do not receive, then return step S801.If receive, then enter step S805.
Because the affirmation information that communication module returns can only illustrate that communication module receives this fault alarm information, and during fault alarm, need Control Node in time to handle it, and the survival state of failure condition in time need be informed Control Node, therefore, the fault alarm frame can not just finish after obtaining the acknowledgement frame of communication module.Have only Control Node clearly to make the order that stops fault alarm, can stop fault alarm.
The described alarm command frame that stops is by the stop alarm command of communication module according to the transmission of the Control Node in the home network, is sent to network home appliance by communication module.This stops the alarm command frame and shows that to network home appliance Control Node has received warning message, and does not need to continue to report to the police.
Step S805 stops to send the fault alarm frame.
Above method is on the basis of above-mentioned communication interface, finishes the required communication step of control and management, and said method only relates to the communication between communication module and the network home appliance, and does not relate to the communication between the relevant Control Node of surplus open network of communication module.
The effect of the communication module in the present embodiment is, provides communication function according to the situation of home network for network home appliance, the above-mentioned communication interface and the means of communication that the communication between itself and the network home appliance then relies on present embodiment to provide.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (19)
1, a kind of communication interface of network home appliance equipment, this communication interface connects network home appliance and independent communication module, it is characterized in that, this communication interface adopts 4 line systems to connect, finish data communication in asynchronous serial half duplex communication mode, the connecting line that described 4 line systems connect comprises that specifically signal receives line, signal sends line, ground wire, power line.
2, the communication interface of network home appliance equipment according to claim 1 is characterized in that, the connecting line that described 4 line systems connect is followed successively by signal in network home appliance one side line preface and receives line, signal transmission line, ground wire, power line; Line preface in communication module one side then corresponds to signal transmission line successively, signal receives line, ground wire, power line.
3, the communication interface of network home appliance equipment according to claim 1, it is characterized in that, the communication interface that described 4 line systems connect comprises the communication plug terminal of reserving on automatically controlled plate of network home appliance and the described independent communication module, this plug terminal can directly patch each other to cooperate and form described 4 line systems connection, also can connect above-mentioned plug terminal by 4 line connecting lines, the two ends of this 4 line connecting line have the plug terminal that can cooperatively interact with plug terminal with the communication on independent communication module and the automatically controlled plate of network home appliance respectively.
4, the communication interface of network home appliance equipment according to claim 3 is characterized in that, the communication of reserving on described independent communication module and the automatically controlled plate of network home appliance has groove shape bayonet arrangement with plug terminal.
5, according to any communication interface of network home appliance equipment of claim 1 to 4, it is characterized in that, the communication frames that communication is adopted between described communication module and the described network home appliance comprises successively: length is the frame head territory of 2 bytes, is used to show the beginning of a frame; Expression comprises the frame length territory of byte number of the entire frame length in frame type territory, data type territory, effective information territory and verification and territory, and the frame length length of field is 1 byte, and its span is the 2-252 byte; Take 2 bits, the frame type territory of the function type of definition frame; Take 6 bits, the data type territory of the function of definition frame data; Length is the effective information territory of 0～250 byte; Take the verification and the territory of 1 byte, its content be by frame length, frame type, data type and effective information by the resulting verification of byte addition and.
6, according to any communication interface of network home appliance equipment of claim 1 to 4, it is characterized in that described communication frames comprises communication command frame and two kinds of function types of communication management frame.
7, the communication interface of network home appliance equipment according to claim 6 is characterized in that, described communication command frame comprises the frame with following function:
Control frame, this Frame sends to network home appliance by communication module, and its data are control command; When network home appliance needed Be Controlled, communication module is transmission control frame as required, up to receiving status frames or the invalid frame that network home appliance returns; If communication module is not received status frames or invalid frame, then repeat the transmission control frame several times at a certain time interval, do not receive the information that network home appliance returns yet, then judge communication abnormality between network home appliance and the communication module;
Status frames, this Frame sends to communication module by network home appliance, its data are the state of network home appliance, after network home appliance receives described control frame, type and effective information according to this control frame are provided with and corresponding action network home appliance, and the current state of the household electrical appliances after will being provided with is according to the packing of the form of this status frames and send in the time that limits;
The fault alarm frame if network home appliance is when having warning message, then sends to described communication module with this warning message with the form of fault alarm frame;
Report frame, this Frame sends to communication module by household electrical appliances, is used for network home appliance and sends information to communication module, and household electrical appliances repeat to send according to certain time interval reports frame, up to the acknowledgement frame of receiving that communication module sends.
8, the communication interface of network home appliance equipment according to claim 7, it is characterized in that described communication command frame also comprises invalid frame, after network home appliance is received control frame, if the control command information in this control frame can't be carried out or the control logic mistake, then send this invalid frame.
9, the communication interface of network home appliance equipment according to claim 7, it is characterized in that, described communication command frame also comprises acknowledgement frame, and this Frame sends to network home appliance by communication module, is used to state publications frame and the fault alarm frame of confirming that communication module receives that network home appliance initiatively sends.
10, the communication interface of network home appliance equipment according to claim 7, it is characterized in that, described communication command frame also comprises and stops the fault alarm frame, after upper layer device or Control Node are received the warning message that communication module transmits, then stop alarm command, after described communication module is received and stopped alarm command, to described network home appliance transmission stopping fault alarm frame to the household electrical appliances transmission, after network home appliance is received this Frame, then no longer send the identical fault alarm frame of content to communication module.
11, the communication interface of network home appliance equipment according to claim 6 is characterized in that, described communication management frame comprises the frame with following function:
Fetch equipment identify label ID command frame, communication module sends this fetch equipment identify label command frame to network home appliance, is used to read the equipment identities sign of network home appliance;
Equipment identities sign ID acknowledgement frame, after being used for network home appliance and receiving described fetch equipment identify label command frame, network home appliance indicates self equipment identities and number adopts this acknowledgement frame to send to communication module;
The link test command frame, whether the communication that is used to test household electrical appliances is working properly; Communication module is according to the instruction of home network Control Node, send the link test command frame to network home appliance, return link was tested acknowledgement frame after network home appliance correctly received this order, communication module receives the link test acknowledgement frame and thinks that then link is intact between household electrical appliances and the communication module, if communication module can not correctly receive in official hour and reply, communication module is then thought link failure between network home appliance and the communication module;
The link test acknowledgement frame is used for the link test command frame that communication module sends is replied;
Fetch equipment communication speed frame is used for the work of new network home appliance equipment when initial, the command frame that is sent to network home appliance by communication module; Communication module adopts 9600bps speed to send order earlier; Reply as not obtaining, use 4800bps instead and send once more; Reply as obtaining not yet, use 2400bps instead and send once more;
The communication speed acknowledgement frame is used to reply described fetch equipment communication speed acknowledgement frame, and its effective information territory comprises a byte, and this byte content is " 1 ", and then communication speed is 9600bps; This byte content is " 2 ", and then communication speed is 4800bps; This byte content is " 3 ", and then communication speed is 2400bps.
12, a kind of means of communication that are used for above-mentioned network household electric equipment communication interface, these means of communication are used to realize that communication module to the network home appliance transfer control instruction, is characterized in that, comprising:
121) the communication module transmission control frame is to network home appliance equipment;
122) communication module judges whether to receive the frame that returns of network home appliance; If receive, then communication finishes; Do not receive yet if wait for the maximum latency T1 of regulation, then return step 121).
13, the means of communication according to claim 12 is characterized in that, described step 122) when middle judged result is returned frame for not receiving, judge the number of times of transmission control frame earlier, if surpass the number of times of regulation, then judge communication abnormality, and stop transmission control frame; If do not surpass the number of times of regulation, then return step 121).
14, the means of communication according to claim 12 is characterized in that, described step 122) described in the frame that returns be status frames or invalid frame.
15, a kind of means of communication that are used for above-mentioned network household electric equipment communication interface, these means of communication are used to realize that network home appliance sends report information to communication module, it is characterized in that, comprising:
151) network home appliance sends to communication module and reports frame;
152) network home appliance judges whether to receive the acknowledgement frame that communication module sends; If receive, then communication process finishes; Do not receive yet if wait for the maximum latency T2 of regulation, then return step 151).
16, the means of communication according to claim 15 is characterized in that, described step 152) in, when judging the acknowledgement frame that does not receive the communication module transmission, the number of times that has sent the report frame is judged by elder generation, if above the number of times of stipulating, then judge communication abnormality, and stop to send the report frame; If do not surpass the number of times of regulation, then return step 151).
17, a kind of means of communication that are used for above-mentioned network household electric equipment communication interface, these means of communication are used to realize that network home appliance sends report information to communication module, it is characterized in that, comprising:
171) network home appliance sends the fault alarm frame to communication module;
172) network home appliance judges whether to receive the acknowledgement frame that communication module sends; If receive, then stop to send the fault alarm frame; Do not receive yet if wait for the maximum latency T3 of regulation, then return step 171).
18, the means of communication according to claim 17 is characterized in that, described step 172) in, if receive the acknowledgement frame that described communication module sends, then also carry out the following step after this step:
173) wait for set time T4;
174) judge whether to receive and stop the alarm command frame; If do not receive, then return step 171).
19, the means of communication according to claim 18 is characterized in that, the described alarm command frame that stops is by the stop alarm command of communication module according to the transmission of the Control Node in the home network, is sent to network home appliance by communication module.
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