CN108123863B - Communication system and communication method of household appliance and household appliance - Google Patents
Communication system and communication method of household appliance and household appliance Download PDFInfo
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- CN108123863B CN108123863B CN201711365051.4A CN201711365051A CN108123863B CN 108123863 B CN108123863 B CN 108123863B CN 201711365051 A CN201711365051 A CN 201711365051A CN 108123863 B CN108123863 B CN 108123863B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40039—Details regarding the setting of the power status of a node according to activity on the bus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40143—Bus networks involving priority mechanisms
- H04L12/4015—Bus networks involving priority mechanisms by scheduling the transmission of messages at the communication node
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Abstract
The invention discloses a communication system and a communication method of a household appliance and the household appliance, wherein the communication system comprises: the slave module is divided into at least one first slave module and a second slave module corresponding to each first slave module according to priority, the first slave module is provided with a first communication interface and a third communication interface, the second slave module is provided with a fourth communication interface, the host module is provided with a second communication interface, each first communication interface is correspondingly connected with the second communication interface through a first communication unit, each third interface is connected with the corresponding fourth communication interface through a second communication unit, the slave module configures the corresponding sending end into a high-impedance state when being powered on, the first slave module configures the corresponding sending end into a sending mode after successfully analyzing an inquiry command sent by the host module, generates response data and sends the response data to the host module, therefore, the loop current caused when the slave module sends response data can be effectively avoided, and the host module can normally receive the data.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a communication system of a household appliance, the household appliance and a communication method of the household appliance.
Background
UART (Universal Asynchronous Receiver/Transmitter) communication is gradually and widely applied to use scenarios such as control, short-distance interaction and the like because of lower physical layer cost, higher communication rate and more perfect verification mechanism. UART communication is generally used only as point-to-point communication, and when a system requires information interaction among a plurality of devices, the information needs to be converted into bus information through a bus transceiver, such as 485, CAN, etc., or connected to a plurality of slave units point-to-point through a host unit having a plurality of UART resources. However, there is a problem in that the host unit using the bus transceiver or using a plurality of UART resources causes an increase in production cost.
However, when two or more slaves transmit messages simultaneously, the master cannot normally receive the messages, or when data transmitted between the slaves is different, for example, when one end transmits a logic high level and the other end transmits a logic low level, loop current is easily generated between the slaves, and the master cannot normally receive the messages.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide a communication system for a household appliance, which can avoid loop current generated between slave modules, and at the same time, ensure that the host module can normally receive data.
A second object of the invention is to propose a household appliance.
A third object of the present invention is to propose a communication method of a household appliance.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a communication system for a home appliance, including: the system comprises M slave modules, a first master module and a second master module, wherein the M slave modules are divided into at least one first slave module and N second slave modules corresponding to each first slave module according to priority, each first slave module is provided with a first communication interface and a third communication interface, each second slave module is provided with a fourth communication interface, the first communication interface, the third communication interface and the fourth communication interface are respectively provided with a receiving end and a transmitting end, M and N are positive integers, and M is greater than N; the host module is provided with a second communication interface, and the second communication interface is provided with a receiving end and a sending end; the communication bus module comprises a first communication unit and a second communication unit, wherein a receiving end and a sending end in a first communication interface of each first slave module are correspondingly connected with a sending end and a receiving end in a second communication interface through the first communication unit, and the receiving end and the sending end in a third communication interface of each first slave module are connected with the sending end and the receiving end in a fourth communication interface of the corresponding N second slave modules through the second communication unit; the master module configures the second communication interface into a receiving and sending mode when being powered on, each first slave module configures a receiving end in the corresponding first communication interface into a receiving mode when being powered on, configures a sending end in the corresponding first communication interface into a high impedance state, configures the sending end in the corresponding first communication interface into a sending mode after each first slave module successfully analyzes the inquiry instruction sent by the master module, generates response data according to the data of the first slave module and the receiving and sending data between the corresponding N second slave modules, and sends the response data to the master module.
According to the communication system of the household appliance provided by the embodiment of the invention, the M slave modules are divided into at least one first slave module and N second slave modules corresponding to each first slave module according to the priority, each first slave module is provided with a first communication interface and a third communication interface, each second slave module is provided with a fourth communication interface, the first communication interface, the third communication interface and the fourth communication interface are respectively provided with a receiving end and a transmitting end, the host module is provided with a second communication interface, the second communication interface is provided with a receiving end and a transmitting end, the communication bus module comprises a first communication unit and a second communication unit, the receiving end and the transmitting end in the first communication interface of each first slave module are correspondingly connected with the transmitting end and the receiving end in the second communication interface through the first communication unit, and the receiving end and the transmitting end in the third interface of each first slave module are correspondingly connected with the fourth communication interfaces of the N second slave modules through the second communication unit The sending end in the corresponding first communication interface is configured to be a sending mode after each first slave module successfully analyzes an inquiry instruction sent by the host module, response data is generated according to the own data and the sending and receiving data between the corresponding N second slave modules, and the response data is sent to the host module. Therefore, in the communication system of the embodiment of the present invention, the sending end in the first communication interface is configured to be in the high impedance state, and the sending end in the first communication interface is configured to be in the sending mode after the inquiry command sent by the host module is successfully analyzed, so that on the premise of not increasing the production cost, the loop current caused by the slave module when sending the response data can be effectively avoided, and the host module can be ensured to normally receive the data.
In addition, the communication system of the household appliance provided by the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, when there is one slave module, the first communication unit includes a first bus and a second bus, the second communication unit includes a third bus and a fourth bus, wherein a receiving end in the first communication interface of the first slave module and a transmitting end in the second communication interface are both connected to the first bus, a transmitting end in the first communication interface of the first slave module and a receiving end in the second communication interface are both connected to the second bus, a receiving end in the third communication interface of the first slave module and a transmitting end in the fourth communication interface of each second slave module are both connected to the third bus, and a transmitting end in the third communication interface of the first slave module and a receiving end in the fourth communication interface of each second slave module are both connected to the fourth bus. According to an embodiment of the present invention, the master module may be further configured to determine whether the system status changes after receiving the feedback message, and send a broadcast message to the plurality of slave modules if the system status changes.
According to one embodiment of the invention, the master module communicates with each of the first slave modules by means of time-sharing asynchronous communication, and each of the first slave modules communicates with the corresponding N second slave modules by means of time-sharing asynchronous communication.
According to an embodiment of the present invention, the master module sends an inquiry instruction to the first bus every first preset time, and after receiving the inquiry instruction, the first slave module parses the inquiry instruction to obtain an ID in the inquiry instruction, and configures a sending end in the corresponding first communication interface into a sending mode when the ID in the inquiry instruction matches with its own ID.
According to an embodiment of the present invention, after each of the first slave modules transmits response data to the master module, the transmitting end in the corresponding first communication interface is restored to the high impedance state.
According to an embodiment of the present invention, each of the first slave modules configures the transmitting end in the corresponding first communication interface into a high impedance state by setting the transmitting end in the corresponding first communication interface into an input mode of GPIO.
In order to achieve the above object, a second embodiment of the present invention provides a household appliance, including a communication system of the household appliance.
According to the household appliance provided by the embodiment of the invention, through the communication system of the household appliance, on the premise of not increasing the production cost, the loop current caused by the slave module and other slaves when the slave module sends response data can be effectively avoided, and meanwhile, the normal data receiving of the master module can be ensured.
In order to achieve the above object, a communication method of a home appliance is provided in an embodiment of a third aspect of the present invention, where a cascade communication system of the home appliance includes M slave modules, a master module and a communication bus module, the M slave modules are divided into at least one first slave module and N second slave modules corresponding to each of the first slave modules according to priority, where each of the first slave modules has a first communication interface and a third communication interface, each of the second slave modules has a fourth communication interface, the first communication interface, the third communication interface and the fourth communication interface respectively have a receiving end and a sending end, the master module has a second communication interface, the second communication interface has a receiving end and a sending end, the communication bus module includes a first communication unit and a second communication unit, and the receiving end and the sending end of each of the first communication interfaces of the first slave modules pass through the first communication unit The unit is correspondingly connected with a sending end and a receiving end in the second communication interface, the receiving end and the sending end in the third communication interface of each first slave module are connected with the sending end and the receiving end in the fourth communication interface of the corresponding N second slave modules through the second communication unit, M and N are positive integers, and M is greater than N, and the cascade communication method comprises the following steps: the master module configures the second communication interface into a receiving and sending mode when being powered on, and each first slave module configures a receiving end in the corresponding first communication interface into a receiving mode when being powered on and configures a sending end in the corresponding first communication interface into a high impedance state; the master module sends an inquiry instruction to each first slave module through the first communication unit; each first slave module configures a sending end in the corresponding first communication interface into a sending mode after successfully analyzing the inquiry instruction sent by the host module, generates response data according to the data of the first slave module and the transceiving data between the corresponding N second slave modules, and sends the response data to the host module.
According to the communication method of the household appliance provided by the embodiment of the invention, the second communication interface is configured into a receiving and sending mode by the host module when the host module is powered on, the receiving end in the corresponding first communication interface is configured into a receiving mode by each first slave module when the first slave module is powered on, the sending end in the corresponding first communication interface is configured into a high impedance state, the host module sends an inquiry instruction to each first slave module through the first communication unit, each first slave module configures the sending end in the corresponding first communication interface into a sending mode after the inquiry instruction sent by the host module is successfully analyzed, and response data is generated according to the own data and the receiving and sending data between the corresponding N second slave modules and sent to the host module. Therefore, according to the communication method provided by the embodiment of the invention, the sending end in the first communication interface is configured to be in the high impedance state, and the sending end in the first communication interface is configured to be in the sending mode after the inquiry instruction sent by the host module is successfully analyzed, so that the loop current caused by the slave and other slaves when the slave sends the response data can be effectively avoided on the premise of not increasing the production cost, and the host end can be ensured to normally receive the data.
In addition, the communication method of the household appliance provided by the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, when there is one slave module, the first communication unit includes a first bus and a second bus, the second communication unit includes a third bus and a fourth bus, wherein a receiving end in the first communication interface of the first slave module and a transmitting end in the second communication interface are both connected to the first bus, a transmitting end in the first communication interface of the first slave module and a receiving end in the second communication interface are both connected to the second bus, a receiving end in the third communication interface of the first slave module and a transmitting end in the fourth communication interface of each second slave module are both connected to the third bus, and a transmitting end in the third communication interface of the first slave module and a receiving end in the fourth communication interface of each second slave module are both connected to the fourth bus.
According to one embodiment of the invention, the master module communicates with each of the first slave modules by means of time-sharing asynchronous communication, and each of the first slave modules communicates with the corresponding N second slave modules by means of time-sharing asynchronous communication.
According to an embodiment of the present invention, the master module sends an inquiry instruction to the first bus every first preset time, and after receiving the inquiry instruction, the first slave module parses the inquiry instruction to obtain an ID in the inquiry instruction, and configures a sending end in the corresponding first communication interface into a sending mode when the ID in the inquiry instruction matches with its own ID.
According to an embodiment of the present invention, after each of the first slave modules transmits response data to the master module, the transmitting end in the corresponding first communication interface is restored to the high impedance state.
According to an embodiment of the present invention, each of the first slave modules configures the transmitting end in the corresponding first communication interface into a high impedance state by setting the transmitting end in the corresponding first communication interface into an input mode of GPIO.
Drawings
Fig. 1 is a block schematic diagram of a communication system of a home appliance according to an embodiment of the present invention;
fig. 2 is a schematic configuration diagram of a communication system of a home appliance according to an embodiment of the present invention;
fig. 3 is a block schematic diagram of a home appliance according to an embodiment of the present invention;
fig. 4 is a flowchart of a communication method of a home appliance according to an embodiment of the present invention;
fig. 5 is a flowchart of a communication method of a home appliance according to an embodiment of the present invention, wherein the method is applied to a host module.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A communication system of a home appliance, and a communication method of a home appliance according to embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a block schematic diagram of a communication system of a home appliance according to an embodiment of the present invention. As shown in fig. 1, a communication system of a home appliance according to an embodiment of the present invention includes: m slave modules, a master module 20, a communication bus module.
The M slave modules are divided into at least one first slave module 11 and N second slave modules 12 corresponding to each first slave module 11 according to priority, wherein each first slave module 11 has a first communication interface and a third communication interface, each second slave module 12 has a fourth communication interface, the first communication interface, the third communication interface and the fourth communication interface respectively have a receiving end and a transmitting end, M and N are positive integers, and M is greater than N; the host module 20 has a second communication interface having a receiver RX20 and a transmitter TX 20; the communication bus module comprises a first communication unit 31 and a second communication unit 32, wherein a receiving end RX10 and a transmitting end TX10 in the first communication interface of each first slave module 11 are correspondingly connected with a transmitting end TX20 and a receiving end RX20 in the second communication interface through the first communication unit 31, and a receiving end RX30 and a transmitting end TX30 in the third communication interface of each first slave module 11 are connected with a transmitting end RX40 and a TX receiving end 40 in the fourth communication interfaces of the corresponding N second slave modules 12 through the second communication unit 32; the master module 20 configures the second communication interface into a receiving and sending mode when being powered on, each first slave module 11 configures a receiving end RX10 in the corresponding first communication interface into a receiving mode when being powered on, configures a transmitting end TX10 in the corresponding first communication interface into a high impedance state, and configures a transmitting end TX10 in the corresponding first communication interface into a sending mode after each first slave module 11 successfully analyzes the inquiry command sent by the master module 20, generates response data according to the own data and the receiving and sending data between the corresponding N second slave modules 12, and sends the response data to the master module 20.
It should be noted that the M slave modules are divided into a first slave module 11 and a second slave module 12 according to priority, each first slave module 11 corresponds to N second slave modules 12, for example, the M slave modules may include one first slave module 11, one first slave module 11 corresponds to N (i.e., M-1) second slave modules 12, and for example, the M slave modules may include two first slave modules 11, i.e., a first slave module 111 and a second slave module 112, the first slave module 111 may include N second slave modules 12, and the second first slave module may include (M-2-N) second slave modules.
It should be further noted that, as intelligent home appliances are becoming popular, in order to improve the interactive experience between the intelligent module and the home appliances, a related intelligent suite (for example, functions of APP remote control, voice control, electronic tag identification, and the like) is present in the bus system as a slave module and is set as a high-priority system when data communication is required, so as to improve the quick response performance of the system, and therefore, priority ranking of the M slave modules may be performed according to conditions such as a system real-time requirement, a function priority, and a function attribute, for example, when the M slave modules include two first slave modules 11, a first slave module 111 may be a centralized control scheduler, a second slave module 112 may be a wifi module, and the host module 20 may be a master control board. At this time, the wifi module has a higher priority, and there are fewer slave modules with the same priority, so that data interaction with the host module 20 can be completed quickly, user operation experience is improved, and other slave modules with lower requirements for real-time performance can be used as N second slave modules 12 corresponding to the first slave module 111 (i.e., a centralized control scheduling board), and further data interaction is performed by the first slave module 111, so that an effect of hierarchical authorization processing is achieved.
Specifically, the communication bus module includes a first communication unit 31 and a second communication unit 32, the first communication unit 31 is configured to connect a first communication interface of the first slave module 11 and a second communication interface of the master module 20, and the second communication unit 32 is configured to connect a third communication interface of the first slave module 11 and a fourth communication interface of the second slave module 12.
That is, the master module 20 and at least one first slave module 11 perform data exchange through the first communication unit 31, and the first slave module 11 and the corresponding N second slave modules 12 perform data exchange through the second communication unit 32.
According to an embodiment of the present invention, when there is one slave module 11, the first communication unit 31 includes a first bus 311 and a second bus 312, the second communication unit 32 includes a third bus 323 and a fourth bus 324, wherein, the receiving terminal RX10 in the first communication interface of the first slave module 11 and the transmitting terminal TX20 in the second communication interface are both connected to the first bus 311, the transmitting terminal TX10 in the first communication interface of the first slave module 11 and the receiving terminal RX20 in the second communication interface are both connected to the second bus 312, the receiving terminal RX30 in the third communication interface of the first slave module 11 and the transmitting terminal TX40 in the fourth communication interface of each second slave module 12 are both connected to the third bus 323, and the transmitting terminal TX30 in the third communication interface of the first slave module 11 and the receiving terminal RX40 in the fourth communication interface of each second slave module 12 are both connected to the fourth bus 324.
Further, as shown in fig. 2, when there are two first slave modules 11, the receiving end RX11 in the first communication interface of the first slave unit 111, the receiving end RX12 in the first communication interface of the second first slave unit 112, and the transmitting end TX20 in the second communication interface are all connected to the first bus 311, and the transmitting end TX11 in the first communication interface of the first slave module 111, the transmitting end TX12 in the first communication interface of the second first slave module 112, and the receiving end RX20 in the second communication interface are all connected to the second bus 312, wherein in the embodiment of the present invention, the second first slave module 12 is a wifi module, so that the number of corresponding second slave modules 12 of the second first slave module 112 is 0, the receiving end RX31 in the third communication interface of the first slave module 111, and the transmitting end TX40 in the fourth communication interface of each corresponding second slave module 12 are all connected to the third bus 323, a transmitting terminal TX31 of the third communication interface of the first slave module 111 and a receiving terminal RX40 of the fourth communication interface of each corresponding second slave 12 are connected to the fourth bus 324, for example, when the first slave module 111 corresponds to three second slave modules, the receiving terminal RX31 of the third communication interface of the first slave module 111 and the transmitting terminal TX41 of the fourth communication interface of the first second slave module 121, the transmitting terminal TX42 of the fourth communication interface of the second slave module 122 and the transmitting terminal TX43 of the fourth communication interface of the third slave module 123 are connected through the third bus 323, the transmitting terminal 5632rx 7 of the third communication interface of the first slave module 111 and the receiving terminal RX41 of the fourth communication interface of the first slave module, the receiving terminal 42 of the fourth communication interface of the second slave module and the receiving terminal RX43 of the fourth communication interface of the third slave module are connected through the fourth bus 324 Are connected.
Specifically, when the household appliance system is powered on, the master module 20 configures the second communication interface into a sending and receiving mode, that is, the second communication interface has both sending and receiving functions, each first slave module 11 configures the receiving end RX10 in the corresponding first communication interface into a receiving mode so as to receive the inquiry command sent by the master module 20, and configures the sending end TX10 in the corresponding first communication interface into a high impedance state so as to keep the port from affecting communications of other first slaves, each first slave module 11 configures the sending end TX10 in the corresponding first communication interface into a sending mode after successfully analyzing the inquiry command sent by the master module 20, and generates response data according to the own data and the sending and receiving data between the corresponding N second slave modules 12, and sends the response data to the master module 20.
Therefore, the transmitting end in the first communication interface of the first slave module is configured to be in a high impedance state, so that the transmitting end in the first communication interface of the slave module releases the second bus when the transmitting end does not need to transmit response data, and meanwhile, the transmitting end of the slave module which performs data response does not affect the transmitting ends of other slave modules, such as a loop circuit is generated, so that the normal data receiving of the master module can be guaranteed.
The first slave module 11 may generate the response data based on the own data and the transmission/reception data between the corresponding N second slave modules 12.
That is, after the first slave module 11 successfully analyzes the inquiry command sent by the master module 20, it is necessary to send the inquiry command to the second slave module 12 through the second communication unit 32, receive the response data sent by the second slave module 12, and further generate the response data according to the self data and the transmission/reception data between the corresponding second slave modules. When the household appliance is powered on, the at least one first slave module 11 configures the third communication interface into a send-receive mode, that is, the third communication interface has both sending and receiving functions, the receiving end RX40 in the fourth communication interface corresponding to each second slave module 12 is configured into a receiving mode so as to receive the inquiry command sent by the corresponding first slave module 11, and the sending end TX40 in the corresponding fourth communication interface is configured into a high impedance state so as to keep the port from affecting the communication of other second slave modules, and after successfully analyzing the inquiry command sent by the corresponding first slave module 11, each second slave module 12 configures the sending end TX40 in the corresponding fourth communication interface into a sending mode so as to send response data to the corresponding first slave module 11.
Therefore, the sending end in the fourth communication interface of the second slave module is configured to be in a high impedance state, so that the sending end in the fourth communication interface of the second slave module releases the fourth bus when the sending end does not need to send response data, and meanwhile, the sending end of the second slave module which carries out data response does not affect the sending ends of other second slave modules, such as a loop circuit is generated, so that the first slave module can be ensured to normally receive data, and the master module can be ensured to normally receive data.
Furthermore, the number of the N second slave modules 12 corresponding to the first slave module 111 may be three, that is, the first second slave module 121, the second slave module 122, and the third second slave module 123, where the first second slave module 121 may be a display panel, the second slave module 122 may be a temperature and humidity acquisition panel, and the third second slave module 123 may be a motor drive panel.
According to an embodiment of the present invention, the N second slave modules 12 corresponding to each first slave module 11 may perform data interaction through the corresponding first slave module 11.
For example, when the first slave module 111 is a centralized control dispatching board, the first second slave module 121 is a display board, the second slave module 122 is a temperature and humidity acquisition board, and the third second slave module 123 is a motor driving board, the first slave module 111 performs data interaction with the first second slave module 121, the second slave module 122, and the third second slave module 123 through the second communication unit 32, that is, the first slave module 111 may sequentially send inquiry commands to the first second slave module 121 and the second slave module 122 to respectively acquire temperature and humidity information and setting parameters, and send data to the third second slave module 123 after receiving response data, so as to control motor components through the third second slave module 123, thereby implementing efficient coordination between layers with the same priority, therefore, the independence among the slave modules can be further segmented by the layered cascade mode, the data exchange and processing capacity among the slave modules is also improved, and the requirement of high real-time performance can be met.
According to an embodiment of the present invention, each first slave module 11 configures the transmitting end TX10 in the corresponding first communication interface into an Input (Input) mode of GPIO (General Purpose Input/Output) to be in a high impedance state by setting the transmitting end TX 10.
According to one embodiment of the present invention, the master module 20 communicates with each first slave module 11 through time-sharing asynchronous communication, and each first slave module 11 communicates with the corresponding N second slave modules through time-sharing asynchronous communication.
Therefore, the communication system of the household appliance in the embodiment of the invention is convenient for monitoring the bus through the serial port monitoring equipment through data time-sharing scheduling, and can quickly analyze the interactive data condition of the master module and the slave module.
According to an embodiment of the present invention, the master module 20 sends an inquiry command to the first bus 311 every first preset time, and after receiving the inquiry command, the first slave module 11 parses the inquiry command to obtain an ID in the inquiry command, and configures the sending end TX10 in the corresponding first communication interface into a sending mode when the ID in the inquiry command matches with its own ID.
That is to say, the inquiry command sent by the master module 20 has an ID (identification) corresponding to the first slave modules 11 one to one, the master module 20 sends the inquiry command to the first bus 311 every a first preset time, that is, the master module 20 sends the inquiry command to the first slave modules 11 through the first bus 311, after receiving the inquiry command, each first slave module 11 parses the inquiry command to obtain the ID in the inquiry command, and determines whether the ID in the inquiry command matches the ID of the first slave module 11 itself, if so, the first slave module 11 configures the sending end TX10 in the corresponding first communication interface into a sending mode to send response data to the master module 20, and if not, the first slave module 11 does not respond.
For example, the master module 20 sends an inquiry command to the first bus 311, the first bus 311 sends the inquiry command to at least one first slave module 11, the first slave module 111 receives the inquiry command and then parses the inquiry command to obtain an ID in the inquiry command, the first slave module 111 determines whether the ID in the inquiry command matches the ID of itself, if so, the first slave module 111 configures a sending end TX11 in the first communication interface into a sending mode to send response data to the master module 20, and if not, communication is ended. After receiving the response data sent by the first slave module 11, the master module 20 waits for the first preset time to end, and sends an inquiry command to the second first slave module 112.
It should be further noted that the first slave module 11 sends an inquiry instruction to the fourth bus 324 every second preset time, after receiving the inquiry instruction, the second slave module 12 parses the inquiry instruction to obtain an ID in the inquiry instruction, and configures the sending terminal TX40 in the corresponding fourth communication interface into the sending mode when the ID in the inquiry instruction matches the self ID.
According to an embodiment of the present invention, after each first slave module 11 finishes sending the response data to the master module 20, the sender TX10 in the corresponding first communication interface is restored to the high impedance state.
Further, after each second slave module 12 finishes sending the response data to the first slave module 11, the sending terminal TX40 in the corresponding fourth communication interface is restored to the high impedance state.
According to an embodiment of the present invention, after receiving the response data sent by the first slave module 11, the master module 20 may clear the first preset time and continue to send the inquiry command to the first bus 311, so as to reduce the waiting time.
That is, after receiving the response data sent by the first slave module 111, the master module 20 may clear the first preset time and send an inquiry command to the second first slave module 112.
In summary, according to the communication system of the household appliance provided in the embodiment of the present invention, M slave modules are divided into at least one first slave module and N second slave modules corresponding to each first slave module according to priorities, each first slave module has a first communication interface and a third communication interface, each second slave module has a fourth communication interface, the first communication interface, the third communication interface, and the fourth communication interface respectively have a receiving end and a transmitting end, the master module has a second communication interface, the second communication interface has a receiving end and a transmitting end, the communication bus module includes a first communication unit and a second communication unit, the receiving end and the transmitting end in the first communication interface of each first slave module are correspondingly connected with the transmitting end and the receiving end in the second communication interface through the first communication unit, and the receiving end and the transmitting end in the third interface of each first slave module are correspondingly connected with the N second slave modules through the second communication unit The sending end and the receiving end in the fourth communication interface are connected, the second communication interface is configured into a receiving and sending mode when the host module is powered on, the receiving end in the corresponding first communication interface is configured into a receiving mode when each first slave module is powered on, the sending end in the corresponding first communication interface is configured into a high-impedance state, the sending end in the corresponding first communication interface is configured into a sending mode after each first slave module successfully analyzes the inquiry command sent by the host module, response data are generated according to the own data and the receiving and sending data between the corresponding N second slave modules, and the response data are sent to the host module. Therefore, in the communication system of the embodiment of the present invention, the sending end in the first communication interface is configured to be in the high impedance state, and the sending end in the first communication interface is configured to be in the sending mode after the inquiry command sent by the host module is successfully analyzed, so that on the premise of not increasing the production cost, the loop current caused by the slave module when sending the response data can be effectively avoided, and the host module can be ensured to normally receive the data.
The embodiment of the invention also provides the household appliance.
Fig. 3 is a block schematic diagram of a home appliance according to an embodiment of the present invention. As shown in fig. 3, the home appliance 200 includes the communication system 100 of the home appliance.
According to the household appliance provided by the embodiment of the invention, through the communication system of the household appliance, on the premise of not increasing the production cost, the loop current caused by the slave module and other slave modules when the slave module sends response data can be effectively avoided, and meanwhile, the normal data receiving of the master module can be ensured.
Fig. 4 is a flowchart of a communication method of a home appliance according to an embodiment of the present invention. The cascade communication system of the household appliance comprises M slave modules, a master module and a communication bus module, wherein the M slave modules are divided into at least one first slave module and N second slave modules corresponding to each first slave module according to priority, each first slave module is provided with a first communication interface and a third communication interface, each second slave module is provided with a fourth communication interface, the first communication interface, the third communication interface and the fourth communication interface are respectively provided with a receiving end and a transmitting end, the master module is provided with a second communication interface, the second communication interface is provided with a receiving end and a transmitting end, the communication bus module comprises a first communication unit and a second communication unit, the receiving end and the transmitting end in the first communication interface of each first slave module are correspondingly connected with the transmitting end and the receiving end in the second communication interface through the first communication unit, and a receiving end and a sending end in the third communication interface of each first slave module are connected with a sending end and a receiving end in the fourth communication interface of the corresponding N second slave modules through second communication units, M and N are positive integers, and M is larger than N.
As shown in fig. 4, the communication method of the household appliance according to the embodiment of the present invention includes the following steps:
s1: the master module configures the second communication interface into a receiving and sending mode when being powered on, and each first slave module configures a receiving end in the corresponding first communication interface into a receiving mode when being powered on and configures a transmitting end in the corresponding first communication interface into a high impedance state.
According to one embodiment of the invention, each first slave module configures the transmitting end in the corresponding first communication interface into a high impedance state by setting the transmitting end to be in an input mode of a GPIO.
S2: the master module sends an inquiry command to each first slave module through the first communication unit.
S3: (ii) a Each first slave module configures a sending end in the corresponding first communication interface into a sending mode after successfully analyzing the inquiry command sent by the host module, generates response data according to the data of the first slave module and the transceiving data between the corresponding N second slave modules, and sends the response data to the host module.
Specifically, when the household appliance system is powered on, the master module configures the second communication interface into a receiving and sending mode, that is, the second communication interface has both sending and receiving functions, each first slave module configures a receiving end in the corresponding first communication interface into a receiving mode so as to receive an inquiry instruction sent by the master module, and configures a sending end in the corresponding first communication interface into a high impedance state so as to keep the port from affecting communication of other first slaves, each first slave module configures the sending end in the corresponding first communication interface into a sending mode after successfully analyzing the inquiry instruction sent by the master module, and generates response data according to the own data and the sending and receiving data between the corresponding N second slave modules, and sends the response data to the master module.
Therefore, the transmitting end in the first communication interface of the first slave module is configured to be in a high impedance state, so that the transmitting end in the first communication interface of the slave module releases the second bus when the transmitting end does not need to transmit response data, and meanwhile, the transmitting end of the slave module which performs data response does not affect the transmitting ends of other slave modules, such as a loop circuit is generated, so that the normal data receiving of the master module can be guaranteed.
The first slave module may generate the response data according to the own data and the transmission/reception data between the corresponding N second slave modules.
That is, when determining that the ID in the inquiry command matches the self ID, the first slave module needs to transmit the inquiry command to the second slave module through the second communication unit, receive the response data transmitted by the second slave module, and generate the response data according to the self data and the transmission and reception data between the self data and the corresponding second slave module. When the household appliance is powered on, the third communication interface is configured into a receiving-sending mode by at least one first slave module, namely the third communication interface has both sending and receiving functions, a receiving end in the fourth communication interface corresponding to each second slave module is configured into a receiving mode so as to receive an inquiry command sent by the corresponding first slave module, a sending end in the corresponding fourth communication interface is configured into a high-impedance state so as to keep the port not to influence the communication of other second slaves, and the sending end in the corresponding fourth communication interface is configured into a sending mode after the inquiry command sent by the corresponding first slave module is successfully analyzed by each second slave module so as to send response data to the corresponding first slave module.
Therefore, the sending end in the fourth communication interface of the second slave module is configured to be in a high impedance state, so that the sending end in the fourth communication interface of the second slave module releases the fourth bus when the sending end does not need to send response data, and meanwhile, the sending end of the second slave module which carries out data response does not affect the sending ends of other second slave modules, such as a loop circuit is generated, so that the first slave module can be ensured to normally receive data, and the master module can be ensured to normally receive data.
According to an embodiment of the present invention, when there is one first slave module, the first communication unit includes a first bus and a second bus, and the second communication unit includes a third bus and a fourth bus, where a receiving end in the first communication interface of the first slave module and a transmitting end in the second communication interface are both connected to the first bus, a transmitting end in the first communication interface of the first slave module and a receiving end in the second communication interface are both connected to the second bus, a receiving end in the third communication interface of the first slave module and a transmitting end in the fourth communication interface of each second slave module are both connected to the third bus, and a transmitting end in the third communication interface of the first slave module and a receiving end in the fourth communication interface of each second slave module are both connected to the fourth bus.
Further, when there are two first slave modules, a receiving end in the first communication interface of the first slave unit, a receiving end in the first communication interface of the second first slave unit, and a transmitting end in the second communication interface of the second first slave unit are all connected to the first bus, and a transmitting end in the first communication interface of the first slave module, a transmitting end in the first communication interface of the second first slave module, and a receiving end in the second communication interface of the second slave module are all connected to the second bus, where in the embodiment of the present invention, the second first slave module is a wifi module, so that the number of the second slave modules corresponding to the second first slave module is 0, a receiving end in the third communication interface of the first slave module and a transmitting end in the fourth communication interface of each corresponding second slave module are both connected to the third bus, and a transmitting end in the third communication interface of the first slave module and a transmitting end in each corresponding fourth communication interface of each second slave module are both connected to the third bus Are connected to the fourth bus.
According to one embodiment of the invention, the master module communicates with each first slave module in a time-sharing asynchronous communication mode, and each first slave module communicates with the corresponding N second slave modules in a time-sharing asynchronous communication mode.
Therefore, the communication system of the household appliance in the embodiment of the invention is convenient for monitoring the bus through the serial port monitoring equipment through data time-sharing scheduling, and can quickly analyze the interactive data condition of the master module and the slave module.
According to one embodiment of the invention, the master module sends an inquiry command to the first bus every first preset time, after receiving the inquiry command, the first slave module analyzes the inquiry command to obtain an ID in the inquiry command, and configures a sending end in the corresponding first communication interface into a sending mode when the ID in the inquiry command is matched with the ID of the first slave module.
That is to say, the inquiry command sent by the master module has an ID (identification) corresponding to the first slave modules one to one, the master module sends the inquiry command to the first bus every first preset time, that is, the master module sends the inquiry command to the first slave modules through the first bus, each first slave module receives the inquiry command, analyzes the inquiry command to obtain the ID in the inquiry command, and determines whether the ID in the inquiry command matches the ID of the first slave module itself, if yes, the first slave module configures the sending end in the corresponding first communication interface into a sending mode to send response data to the master module, and if not, the first slave module does not respond.
For example, the master module sends an inquiry instruction to the first bus, the first bus sends the inquiry instruction to at least one first slave module, the first slave module receives the inquiry instruction and then analyzes the inquiry instruction to obtain an ID in the inquiry instruction, the first slave module determines whether the ID in the inquiry instruction matches the ID of the first slave module, if so, the first slave module configures a sending end in the first communication interface into a sending mode to send response data to the master module, and if not, communication is ended. And the master module waits for the first preset time to end after receiving the response data sent by the first slave module, and sends an inquiry instruction to the second first slave module.
It should be further noted that the first slave module sends an inquiry instruction to the second bus every second preset time, after receiving the inquiry instruction, the second slave module analyzes the inquiry instruction to obtain an ID in the inquiry instruction, and configures a sending end in the corresponding fourth communication interface into a sending mode when the ID in the inquiry instruction matches the ID of the second slave module.
According to an embodiment of the present invention, after each first slave module finishes sending the response data to the master module, the sending end in the corresponding first communication interface is restored to the high impedance state.
Further, after each second slave module sends response data to the first slave module, the sending terminal TX40 in the corresponding fourth communication interface is restored to the high impedance state.
According to an embodiment of the present invention, after receiving the response data sent by the first slave module, the master module may clear the first preset time and continue to send the inquiry command to the first bus, so as to reduce the waiting time.
That is to say, after receiving the response data sent by the first slave module, the master module may clear the first preset time, and send an inquiry instruction to the second first slave module.
According to a specific embodiment of the present invention, wherein the M slave modules include two first slave modules and three second slave modules, as shown in fig. 5, the communication method of the household appliance according to the embodiment of the present invention includes:
s101: the master module sends an inquiry command to a first slave module and configures first preset time.
S102: and judging whether response data sent by the first slave module is received or not.
If yes, executing step S104; if not, step S103 is performed.
S103: and judging whether the waiting time reaches a first preset time.
If yes, executing step S104; if not, return to step S103.
S104: the master module sends an inquiry command to the second first slave module.
S105: and judging whether response data sent by the second first slave module is received or not.
If yes, go to step S107; if not, step S106 is performed.
S106: and judging whether the waiting time reaches a first preset time.
If yes, go to step S107; if not, return to step S106.
S107: and finishing the polling of the current round.
In summary, according to the communication method of the home appliance provided by the embodiment of the present invention, the host module configures the second communication interface into the receiving/sending mode when being powered on, each first slave module configures the receiving end in the corresponding first communication interface into the receiving mode when being powered on, and configures the sending end in the corresponding first communication interface into the high impedance state, the host module sends the query instruction to each first slave module through the first communication unit, each first slave module configures the sending end in the corresponding first communication interface into the sending mode after successfully analyzing the query instruction sent by the host module, and generates the response data according to the self data and the receiving/sending data between the corresponding N second slave modules, and sends the response data to the host module. Therefore, according to the communication method provided by the embodiment of the invention, the sending end in the first communication interface is configured to be in a high impedance state, and the sending end in the first communication interface is configured to be in a sending mode after the inquiry instruction sent by the host module is successfully analyzed, so that the loop current caused by the slave module and other slave modules when the slave sends the response data can be effectively avoided on the premise of not increasing the production cost, and the host end can be ensured to normally receive the data.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (13)
1. A cascade communication system of a home appliance, comprising:
the system comprises M slave modules, wherein the M slave modules are divided into at least one first slave module and at least one second slave module according to priority, each first slave module corresponds to the N second slave modules, each first slave module is provided with a first communication interface and a third communication interface, each second slave module is provided with a fourth communication interface, the first communication interface, the third communication interface and the fourth communication interface are respectively provided with a receiving end and a transmitting end, M and N are positive integers, and M is larger than N;
the host module is provided with a second communication interface, and the second communication interface is provided with a receiving end and a sending end;
the communication bus module comprises a first communication unit and a second communication unit, wherein a receiving end and a sending end in a first communication interface of each first slave module are correspondingly connected with a sending end and a receiving end in a second communication interface through the first communication unit, and the receiving end and the sending end in a third communication interface of each first slave module are connected with the sending end and the receiving end in a fourth communication interface of the corresponding N second slave modules through the second communication unit;
wherein the master module configures the second communication interface into a receiving and sending mode when being powered on, each first slave module configures a receiving end in the corresponding first communication interface into a receiving mode when being powered on, and configures a transmitting end in the corresponding first communication interface into a high impedance state,
and after successfully analyzing the inquiry command sent by the master module, any one of the first slave modules configures the sending end in the corresponding first communication interface into a sending mode, generates response data according to the own data and the transceiving data between the corresponding N second slave modules, and sends the response data to the master module.
2. The cascade communication system of home appliances of claim 1, wherein when the first slave module is one, the first communication unit includes a first bus and a second bus, and the second communication unit includes a third bus and a fourth bus, wherein,
a receiving end of the first communication interface of the first slave module and a transmitting end of the second communication interface are both connected to the first bus, a transmitting end of the first communication interface of the first slave module and a receiving end of the second communication interface of the first slave module are both connected to the second bus, a receiving end of the third communication interface of the first slave module and a transmitting end of the fourth communication interface of each second slave module are both connected to the third bus, and a transmitting end of the third communication interface of the first slave module and a receiving end of the fourth communication interface of each second slave module are both connected to the fourth bus.
3. The cascade communication system of home appliances according to claim 2, wherein the master module communicates with each of the first slave modules by means of time-division asynchronous communication, and each of the first slave modules communicates with a corresponding N of the second slave modules by means of time-division asynchronous communication.
4. The cascade communication system of home appliances according to claim 2, wherein the master module sends an inquiry command to the first bus every first preset time, and after receiving the inquiry command, the first slave module parses the inquiry command to obtain an ID in the inquiry command, and configures a sending end in the corresponding first communication interface into a sending mode when the ID in the inquiry command matches its own ID.
5. The cascade communication system of home appliances according to any one of claims 1 to 4, wherein each of the first slave modules returns the transmitting end of the corresponding first communication interface to the high impedance state after completion of the transmission of the response data to the master module.
6. The cascade communication system of home appliances according to claim 5, wherein each of the first slave modules configures the transmitting end in the corresponding first communication interface into a high impedance state by setting it to an input mode of GPIO.
7. A household appliance, characterized in that it comprises a cascade communication system of a household appliance according to any one of claims 1 to 6.
8. The cascade communication method of the household appliance is characterized in that a cascade communication system of the household appliance comprises M slave modules, a master module and a communication bus module, wherein the M slave modules are divided into at least one first slave module and at least one second slave module according to priority, each first slave module corresponds to the N second slave modules, each first slave module is provided with a first communication interface and a third communication interface, each second slave module is provided with a fourth communication interface, the first communication interface, the third communication interface and the fourth communication interface are respectively provided with a receiving end and a sending end, the master module is provided with a second communication interface, the second communication interface is provided with a receiving end and a sending end, the communication bus module comprises a first communication unit and a second communication unit, and the receiving end and the sending end in the first communication interface of each first slave module pass through the first communication unit The unit is correspondingly connected with a sending end and a receiving end in the second communication interface, the receiving end and the sending end in the third communication interface of each first slave module are connected with the sending end and the receiving end in the fourth communication interface of the corresponding N second slave modules through the second communication unit, M and N are positive integers, and M is greater than N, and the cascade communication method comprises the following steps:
the master module configures the second communication interface into a receiving and sending mode when being powered on, and each first slave module configures a receiving end in the corresponding first communication interface into a receiving mode when being powered on and configures a sending end in the corresponding first communication interface into a high impedance state;
the master module sends an inquiry instruction to each first slave module through the first communication unit;
any one of the first slave modules configures the sending end in the corresponding first communication interface into a sending mode after successfully analyzing the inquiry command sent by the host module, generates response data according to the own data and the transceiving data between the corresponding N second slave modules, and sends the response data to the host module.
9. The cascade communication method of home appliances according to claim 8, wherein, when the first slave module is one, the first communication unit includes a first bus and a second bus, and the second communication unit includes a third bus and a fourth bus, wherein,
a receiving end of the first communication interface of the first slave module and a transmitting end of the second communication interface are both connected to the first bus, a transmitting end of the first communication interface of the first slave module and a receiving end of the second communication interface of the first slave module are both connected to the second bus, a receiving end of the third communication interface of the first slave module and a transmitting end of the fourth communication interface of each second slave module are both connected to the third bus, and a transmitting end of the third communication interface of the first slave module and a receiving end of the fourth communication interface of each second slave module are both connected to the fourth bus.
10. The cascade communication method of a home appliance according to claim 8, wherein the master module communicates with each of the first slave modules by means of time-division asynchronous communication, and each of the first slave modules communicates with a corresponding N of the second slave modules by means of time-division asynchronous communication.
11. The cascade communication method of home appliances according to claim 9, wherein the master module sends an inquiry command to the first bus every first preset time, and after receiving the inquiry command, the first slave module parses the inquiry command to obtain an ID in the inquiry command, and configures a sending end in the corresponding first communication interface into a sending mode when the ID in the inquiry command matches its own ID.
12. The cascade communication method of a home appliance according to any one of claims 8 to 11, wherein after the transmission of the response data from each first slave module to the master module is completed, the transmitting end in the corresponding first communication interface is restored to the high impedance state.
13. The cascade communication method of a home appliance according to claim 12, wherein each of the first slave modules configures the transmitting end in the corresponding first communication interface into a high impedance state by setting it to an input mode of GPIO.
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| CN101075945B (en) * | 2006-05-19 | 2011-06-08 | 中国科学院沈阳自动化研究所 | Method for determining realtime Ethernet telecommunication |
| CN101018115B (en) * | 2007-02-13 | 2010-05-19 | 山东大学 | Real time synchronization network based on the standard Ethernet and its operating method |
| CN101763333B (en) * | 2008-12-08 | 2015-01-21 | 北京谊安医疗系统股份有限公司 | Bus controller and method for realizing multi-host communication |
| JP5434230B2 (en) * | 2009-04-22 | 2014-03-05 | ソニー株式会社 | Wireless communication apparatus, wireless communication system, wireless communication method, and program |
| CN102012885A (en) * | 2010-09-15 | 2011-04-13 | 开源集成电路(苏州)有限公司 | System and method for realizing communication by adopting dynamic I2C bus |
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| CN103946829B (en) * | 2011-10-05 | 2016-09-21 | 美国亚德诺半导体公司 | The dual-wire communications system distributed for high-speed data and electric power |
| US10311010B2 (en) * | 2011-10-05 | 2019-06-04 | Analog Devices, Inc. | Two-wire communication systems and applications |
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| CN103248089A (en) * | 2013-04-11 | 2013-08-14 | 鸿富锦精密工业（深圳）有限公司 | Power management system and electronic devices thereof |
| CN106161560A (en) * | 2015-04-21 | 2016-11-23 | 美的集团股份有限公司 | The communication system of appliance system |
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| CN106357301A (en) * | 2016-08-25 | 2017-01-25 | 阳光电源股份有限公司 | Cascaded power line carrier wave method and device |
| CN107040284B (en) * | 2017-03-27 | 2020-10-02 | 西安电子科技大学 | Multi-address access method for improving reliability and stability of data transmission |
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