CN114884770A - Multi-machine communication system and communication method based on system bus - Google Patents
Multi-machine communication system and communication method based on system bus Download PDFInfo
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- CN114884770A CN114884770A CN202210817789.4A CN202210817789A CN114884770A CN 114884770 A CN114884770 A CN 114884770A CN 202210817789 A CN202210817789 A CN 202210817789A CN 114884770 A CN114884770 A CN 114884770A
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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
- H04L12/40019—Details regarding a bus master
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses a multi-machine communication system and a communication method based on a system bus, which comprises a multi-machine communication group network distributed based on the system bus, wherein the multi-machine communication group network comprises a host and a slave group, the slave group comprises a normal slave and a monitoring slave, the normal slave works in a bus data interaction mode at any time of multi-machine communication, the monitoring slave works in a synchronous monitoring acquisition mode, and the synchronous monitoring acquisition mode comprises the following steps: the monitoring slave machines can synchronously monitor and acquire the bus data sent by the master machine to the monitored normal slave machines. The invention solves the problem of longer data acquisition time of a non-data slave in multi-machine communication in the prior art, greatly reduces the transmission time for acquiring data from the same slave by multiple devices, improves the transmission utilization rate, and realizes the effect of simultaneously acquiring required data by multiple devices under the condition of not influencing the functions of buses such as I2C and the like.
Description
Technical Field
The invention belongs to the technical field of multi-machine communication, and particularly relates to a multi-machine communication system and a multi-machine communication method based on a system bus.
Background
In the existing multi-machine communication process, as shown in fig. 2 and 3, a first transmission host acquires data first; the second transmission obtains data from the slave 1; the third transmission obtains data from the slave 2; during the first to third transmissions, the data in the master, the slave 1 and the slave 2 may be different, and some problems (such as difference of display screens) may occur during actual use, so that the problem in the prior art is that the non-data slave takes a long time to acquire data in multi-machine communication.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above problems, the present invention is directed to solve the problem of long time for a non-data slave to acquire data in multi-machine communication.
The technical scheme is as follows: a multi-machine communication system based on a system bus comprises:
the multi-machine communication group network based on system bus distribution comprises a host and a slave, wherein the slave comprises a normal slave and a monitoring slave, the normal slave works in a bus data interaction mode at any time of multi-machine communication, the monitoring slave works in a synchronous monitoring acquisition mode, and the synchronous monitoring acquisition mode comprises: the monitoring slave machines can synchronously monitor and acquire the bus data sent by the master machine to the monitored normal slave machines.
Further, the snooping slave maps a local address and at least one snooping address.
Further, the monitoring address of the monitoring slave machine is the local address of the monitored normal slave machine.
Further, the local address and the monitoring address can be set in a write address mode.
Further, the address writing mode includes:
if the monitoring address is the local address, the slave machine only works in a bus data interaction mode;
if the monitoring address of the current slave machine is the local address of the normal slave machine, the slave machine works in a bus data interaction mode or a synchronous monitoring acquisition mode.
A multi-machine communication method based on a system bus comprises the following steps:
bus data interaction mode:
judging whether the received data read-write address is matched with the local address, if so, then:
if the current bus data is in a write-in state, writing the current bus data into the slave;
if the current bus data is in a read state, reading the current bus data from the slave;
otherwise;
synchronous listening acquisition mode:
judging whether the received data read-write address is matched with the monitoring address, if so, then:
and if the current bus data is in a writing state, writing the bus data written by the host and the monitored normal slave into the slave.
Further, the multi-machine communication method further comprises: the synchronous snoop acquisition mode further comprises:
if the interaction mode of the host and the monitored normal slave machines adopts the sectional transmission, the monitoring slave machines can synchronously monitor and acquire the bus data of the sectional transmission.
Further, the multi-machine communication method further comprises:
slave address allocation mode:
and judging whether the slave machine distribution address in the received address distribution instruction is matched with the local address, if so, writing the local address of the monitored normal slave machine into the local monitoring address, and enabling the slave machine to work in a bus data interaction mode or a synchronous monitoring acquisition mode.
Further, the multi-machine communication method further comprises:
slave dynamic address allocation mode:
and judging whether the pre-allocated address of the slave machine in the received address allocation instruction is matched with the local address, and if so, writing the dynamic address into the monitoring address.
Further, the multi-machine communication method further comprises:
bus data interaction mode:
after the current bus data is written into the local computer or read out from the local computer, corresponding confirmation information is returned;
synchronous listening acquisition mode:
no information is returned after the current bus data is written locally.
Has the advantages that: the invention adopts a multi-machine communication group network based on system bus distribution, because each equipment slave machine is added with a group of slave machine addresses 2, when the master machine operates the slave machine address 1, the equipment is a normal I2C slave machine; when the master operates on the slave address 2, the device enters a listening mode, that is, the device saves data on the bus while having no response or feedback to the master, as shown in fig. 1, the master operates on a data slave (the slave address is slave _ ID 3), the slave 1 and the slave 2 listen to and save data of the master and the data slave, when the master obtains required data from the data slave, the slave 1 and the slave 2 also obtain data at the same time, and the working principle is as follows: the main structure of the multi-machine communication group network comprises a host and a plurality of slave machines, wherein the slave machines in the slave machine group are divided into normal slave machines (namely, the normal slave machines are in normal communication with the host) at any time of multi-machine communication, and the slave machines (namely, the data during the communication between the normal slave machines and the host) are monitored, so that the transmission time of the data acquired by a plurality of devices from the same slave machine can be greatly reduced, and the transmission utilization rate is improved; the method realizes that multiple devices obtain required data simultaneously without influencing the functions of the buses such as I2C and the like.
Drawings
Fig. 1 is a system configuration diagram of the multi-machine communication system of the present invention;
fig. 2 is a prior art block diagram of a multi-machine communication system in the background art;
fig. 3 is a prior art state diagram of a prior art multi-machine communication system;
fig. 4 is a diagram illustrating a state change of a multi-machine communication system according to the present invention;
FIG. 5 is a flow chart of a method of multi-machine communication according to the present invention;
fig. 6 is a flowchart illustrating a multi-machine communication method according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
in the figure:
1-a host; 2-a slave unit; 3-working in a normal slave machine of a bus data interaction mode at any time of multi-machine communication; 4-working in the monitoring slave machine of the synchronous monitoring acquisition mode at the same time of multi-machine communication;
s1011-judging whether the received data read-write address is matched with the local address or not, and if so, judging whether the received data read-write address is matched with the local address;
s1012, judging whether the received data read-write address is matched with the monitoring address or not, and if so, judging whether the received data read-write address is matched with the monitoring address;
s1021, if the current bus data is in a writing state;
s1022-, writing the current bus data into the slave;
s1031, if the current bus data is in a read-out state;
s1032-reading the current bus data from the slave;
s1041-if the current bus data is in a write-in state;
s1042-writing the bus data written by the master and the monitored normal slave into the slave.
Example (b):
in this embodiment: as shown in fig. 1 and 4, a multi-machine communication system based on a system bus includes: the multi-machine communication group network based on system bus distribution comprises a host 1 and a slave machine group 2, wherein the slave machine group 2 comprises a normal slave machine 3 and a monitoring slave machine 4, the normal slave machine 3 works in a bus data interaction mode at any time of multi-machine communication, the monitoring slave machine 4 works in a synchronous monitoring acquisition mode, and the synchronous monitoring acquisition mode comprises: the snooping slave 4 can synchronously snoop and acquire the bus data sent by the master 1 to the snooped normal slave 3.
Due to the fact that a multi-machine communication group network based on system bus distribution is adopted and comprises a host machine and a slave machine set, the slave machine set comprises a normal slave machine and a monitoring slave machine, when the multi-machine communication is carried out at any moment, the normal slave machine works in a bus data interaction mode, the monitoring slave machine works in a synchronous monitoring acquisition mode, and the synchronous monitoring acquisition mode comprises the following steps: the monitoring slave machines can synchronously monitor and acquire bus data sent by the master machine to the monitored normal slave machines, and because each equipment slave machine is added with a group of slave machine addresses 2, when the master machine operates the slave machine address 1, the equipment is a normal I2C slave machine; when the master operates on the slave address 2, the device enters a listening mode, that is, the device saves data on the bus while having no response or feedback to the master, as shown in fig. 1, the master operates on a data slave (in this example, the slave address is slave _ ID 3), the slave 1 and the slave 2 listen to and save data of the master and the data slave, and when the master obtains required data from the data slave, the slave 1 and the slave 2 also obtain data at the same time, and the working principle is as follows: the main structure of the multi-machine communication group network comprises a host and a plurality of slave machines, wherein the slave machines in the slave machine group are divided into normal slave machines (namely, the normal slave machines are in normal communication with the host) at any time of multi-machine communication, and the slave machines (namely, the data during the communication between the normal slave machines and the host) are monitored, so that the transmission time of the data acquired by a plurality of devices from the same slave machine can be greatly reduced, and the transmission utilization rate is improved; the method realizes that multiple devices obtain required data simultaneously without influencing the functions of the buses such as I2C and the like.
The snooping slave 4 maps a local address and at least one snooping address.
Because the monitoring slave machine is adopted to map a local address and at least one monitoring address, the system slave machine in the existing multi-machine communication group network only has one address (namely the local address), so that the monitoring slave machine can only receive data of the local address, but cannot monitor or acquire data of other slave machines, thereby causing an error of data time.
The monitoring address of the monitoring slave machine is the local address of the monitored normal slave machine 3.
Since the monitoring address of the monitoring slave machine is the local address of the monitored normal slave machine, the monitoring slave machine can synchronously monitor and acquire the bus data interacted between the monitored normal slave machine and the host machine, and the monitoring slave machine is specified by the monitoring address, so that the aim of step monitoring and acquiring the bus data can be fulfilled by specifying the address of the monitored normal slave machine.
The local address and the monitoring address can be set in a writing address mode.
The local address and the monitoring address can be set by writing the address, and the monitoring address of each slave machine in the multi-machine communication group network is not invariable and can be set by commands or based on a bus protocol, so that the whole multi-machine communication group network is a dynamic structure.
The writing address mode comprises the following steps:
if the monitoring address is the local address, the slave machine only works in a bus data interaction mode;
if the monitoring address of the current slave machine is the local address of the normal slave machine 3, the slave machine works in a bus data interaction mode or a synchronous monitoring acquisition mode.
The writing address mode comprises the following steps: if the monitoring address is the local address, the slave machine only works in a bus data interaction mode; if the monitoring address of the current slave machine is the local address of the normal slave machine, the slave machine works in a bus data interaction mode or a synchronous monitoring acquisition mode, because (1) if the slave machine can be designated as a non-monitoring slave machine, only the purpose of data interaction is completed, and the slave machine does not have a monitoring function, and (2) as a monitoring slave machine, the slave machine has the functions of the normal slave machine and the monitoring function, the slave machine under the multi-machine communication group network can simultaneously acquire required data by multiple devices under the condition of not influencing the self functions of buses such as I2C and the like.
As shown in fig. 5 and 6, the multi-machine communication method includes:
bus data interaction mode:
judging whether the received data read-write address is matched with the local address, if so, performing the following steps:
if the current bus data is in the write-in state S1021, writing the current bus data into the slave S1022;
if the current bus data is in the read-out state S1031, reading out the current bus data S1032 from the slave;
otherwise;
synchronous listening acquisition mode:
judging whether the received data read-write address is matched with the monitoring address, if so, performing the following steps:
if the current bus data is in the write state S1041, the bus data written by the host 1 and the monitored normal slave 3 is written into the slave S1042.
Meanwhile, the invention also provides a multi-machine communication method based on the system bus, and the multi-machine communication method comprises the following steps: bus data interaction mode: judging whether the received data read-write address is matched with a local address, if so, writing the current bus data into the slave machine if the current bus data is in a write-in state; if the current bus data is in a read state, reading the current bus data from the slave; otherwise; synchronous listening acquisition mode: judging whether the received data read-write address is matched with the monitoring address, if so, writing the bus data written by the host and the monitored normal slave into the slave if the current bus data is in a write-in state; if the current bus data is in a read state, the bus data interacted between the host and the monitored normal slave is written into the slave, and the working principle is as follows: any slave in the multi-machine communication group network is reserved with the same section of program, when the slave obtains the address, whether the obtained address matches the slave address is judged, if the obtained address matches the slave address, the corresponding read or write operation is executed, ACK is returned, bus communication is finished, if the obtained address does not match the slave monitoring address, the slave monitoring address is judged, if the obtained address matches the slave monitoring address, a monitoring mode is entered, namely (only write operation is performed, but no ACK is returned), bus communication is finished, if the obtained address does not match the slave monitoring address, any data is not accepted, firstly, the same section of program is reserved on the basis of any slave, as the program is improved, the same section of program is only updated, and the property of the slave is not required to be updated, therefore, the system is convenient to upgrade, the working efficiency is improved, meanwhile, the program structure mode is more flexible, namely, the normal slave and the monitor slave are not required to be distinguished, the transmission time of multiple devices for acquiring data from the same slave machine can be greatly reduced, and the transmission utilization rate is improved; the method realizes that multiple devices obtain required data simultaneously without influencing the functions of the buses such as I2C and the like.
The multi-machine communication method further comprises the following steps: the synchronous snoop acquisition mode further comprises:
if the interaction mode of the master 1 and the monitored normal slave 3 adopts the segmented transmission, the monitoring slave 4 can synchronously monitor and acquire the bus data of the segmented transmission.
The adoption of the synchronous monitoring acquisition mode further comprises the following steps: if the interaction mode of the master machine and the monitored normal slave machines adopts the sectional transmission, the monitored slave machines can synchronously monitor and acquire the bus data of the sectional transmission, and the system can select to work in the sectional mode according to the situation on site, and the monitoring function is only data monitoring, so that the monitored normal slave machines and the master machine only adopt the sectional data transmission, and the monitored slave machines work in the sectional transmission mode.
The multi-machine communication method further comprises the following steps:
slave address allocation mode:
and judging whether the slave machine distribution address in the received address distribution instruction is matched with the local address, if so, writing the local address of the monitored normal slave machine 3 into the local monitoring address, and enabling the slave machine to work in a bus data interaction mode or a synchronous monitoring acquisition mode.
Because a slave address allocation mode is adopted: judging whether the slave machine distribution address in the received address distribution instruction is matched with a local machine address, if so, writing the local machine address of the monitored normal slave machine into a local machine monitoring address, wherein the local machine works in a bus data interaction mode or a synchronous monitoring acquisition mode, and the monitoring address is the local machine address and only works in the bus data interaction mode because the function of monitoring the slave machine depends on the setting of the address, namely the setting of the local machine address and the monitoring address; if the monitoring address is the normal slave address, the slave works in the bus data interaction mode or the synchronous monitoring acquisition mode, so that the flexibility of system application is improved.
The multi-machine communication method further comprises the following steps:
slave dynamic address allocation mode:
and judging whether the pre-allocated address of the slave machine in the received address allocation instruction is matched with the local address, and if so, writing the dynamic address into the monitoring address.
The multi-machine communication method further comprises the following steps: slave dynamic address allocation mode: judging whether the pre-allocated address of the slave machine in the received address allocation instruction matches the local address, if so, writing the dynamic address as the monitoring address, and in the multi-machine communication process, if the system change requirement needs to be changed from monitoring one normal slave machine to monitoring another normal monitoring slave machine, dynamically changing the monitoring address of the monitoring slave machine is needed, so that the monitoring address needs to be changed from one normal slave machine to another normal slave machine, and therefore, in the communication process, the dynamic allocation of the monitoring address is carried out.
The multi-machine communication method further comprises the following steps:
bus data interaction mode:
after the current bus data is written into the local computer or read out from the local computer, corresponding confirmation information is returned;
synchronous listening acquisition mode:
no information is returned after the current bus data is written locally.
Due to the adoption of a bus data interaction mode: after the current bus data is written into the local computer or read out from the local computer, corresponding confirmation information is returned; synchronous listening acquisition mode: after the current bus data is written into the local computer, no information is returned, and as normal data interaction is responded (namely an ACK signal is returned), no signal is returned in the monitoring mode, so that the states of the two modes can be distinguished conveniently, and the interference to the normal ACK signal is effectively prevented.
The working principle is as follows:
the invention relates to a multi-machine communication group network based on system bus distribution, which comprises a host machine and a slave machine group, wherein the slave machine group comprises a normal slave machine and a monitoring slave machine, the normal slave machine works in a bus data interaction mode at any moment of multi-machine communication, the monitoring slave machine works in a synchronous monitoring acquisition mode, and the synchronous monitoring acquisition mode comprises the following steps: the monitoring slave machines can synchronously monitor and acquire bus data sent by the master machine to the monitored normal slave machines, and because each equipment slave machine is added with a group of slave machine addresses 2, when the master machine operates the slave machine address 1, the equipment is a normal I2C slave machine; when the master operates on the slave address 2, the device enters a listening mode, that is, the device saves data on the bus while having no response or feedback to the master, as shown in fig. 1, the master operates on a data slave (in this example, the slave address is slave _ ID 3), the slave 1 and the slave 2 listen to and save data of the master and the data slave, and when the master obtains required data from the data slave, the slave 1 and the slave 2 also obtain data at the same time, and the working principle is as follows: the main structure of the multi-machine communication group network comprises a host and a plurality of slave machines, wherein the slave machines in the slave unit are divided into normal slave machines (normally communicated with the host) at any time of multi-machine communication, and the monitoring slave machines (acquiring data when the normal slave machines are communicated with the host) can monitor the data from the same slave machine by a large margin, so that the transmission time of the data acquired by a plurality of devices from the same slave machine is reduced, and the transmission utilization rate is improved; under the condition of not influencing the functions of buses such as I2C and the like, the method realizes that multiple devices simultaneously obtain required data;
the multi-machine communication method comprises the following steps: bus data interaction mode: judging whether the received data read-write address is matched with a local address, if so, writing the current bus data into the slave machine if the current bus data is in a write-in state; if the current bus data is in a read state, reading the current bus data from the slave; otherwise; synchronous listening acquisition mode: judging whether the received data read-write address is matched with the monitoring address, if so, writing the bus data written by the host and the monitored normal slave into the slave if the current bus data is in a write-in state; if the current bus data is in a read state, the bus data interacted between the host and the monitored normal slave is written into the slave, and the working principle is as follows: any slave in the multi-machine communication group network is reserved with the same section of program, when the slave obtains the address, whether the obtained address matches the slave address is judged, if the obtained address matches the slave address, the corresponding read or write operation is executed, ACK is returned, bus communication is finished, if the obtained address does not match the slave monitoring address, the slave monitoring address is judged, if the obtained address matches the slave monitoring address, a monitoring mode is entered, namely (only write operation is performed, but no ACK is returned), bus communication is finished, if the obtained address does not match the slave monitoring address, any data is not accepted, firstly, the same section of program is reserved on the basis of any slave, as the program is improved, the same section of program is only updated, and the property of the slave is not required to be updated, therefore, the system is convenient to upgrade, the working efficiency is improved, meanwhile, the program structure mode is more flexible, namely, the normal slave and the monitor slave are not required to be distinguished, the transmission time of multiple devices for acquiring data from the same slave machine can be greatly reduced, and the transmission utilization rate is improved; the method realizes that multiple devices obtain required data simultaneously without influencing the functions of the buses such as I2C and the like.
The invention solves the problem that the non-data slave machine in the multi-machine communication has longer time for acquiring data in the prior art, greatly reduces the transmission time for acquiring data from the same slave machine by a plurality of devices, and improves the transmission utilization rate; the beneficial technical effect of simultaneously obtaining required data by multiple devices is realized without influencing the functions of the buses such as I2C and the like.
Claims (10)
1. A multi-machine communication system based on a system bus, comprising:
the multi-machine communication group network based on system bus distribution comprises a host and a slave, wherein the slave comprises a normal slave and a monitoring slave, the normal slave works in a bus data interaction mode at any time of multi-machine communication, the monitoring slave works in a synchronous monitoring acquisition mode, and the synchronous monitoring acquisition mode comprises: the monitoring slave machines can synchronously monitor and acquire the bus data sent by the master machine to the monitored normal slave machines.
2. The system bus-based multi-machine communication system as claimed in claim 1, wherein said snooping slave maps a local address and at least one snooping address.
3. The system bus-based multi-machine communication system as claimed in claim 2, wherein the snooping address of the snooping slave is the local address of the snooped normal slave.
4. The system bus-based multi-machine communication system as claimed in claim 3, wherein the local address and the snoop address are set by writing address.
5. The system bus-based multi-machine communication system as claimed in claim 4, wherein the address writing means comprises:
if the monitoring address is the local address, the slave machine only works in a bus data interaction mode;
if the monitoring address of the current slave machine is the local address of the normal slave machine, the slave machine works in a bus data interaction mode or a synchronous monitoring acquisition mode.
6. A multi-machine communication method based on a system bus is characterized by comprising the following steps:
bus data interaction mode:
judging whether the received data read-write address is matched with the local address, if so, then:
if the current bus data is in a write-in state, writing the current bus data into the slave;
if the current bus data is in a read state, reading the current bus data from the slave;
otherwise;
synchronous listening acquisition mode:
judging whether the received data read-write address is matched with the monitoring address, if so, then:
and if the current bus data is in a writing state, writing the bus data written by the host and the monitored normal slave into the slave.
7. The multi-machine communication method based on the system bus as claimed in claim 6, wherein the multi-machine communication method further comprises: the synchronous snoop acquisition mode further comprises:
if the interaction mode of the host and the monitored normal slave machines adopts the sectional transmission, the monitoring slave machines can synchronously monitor and acquire the bus data of the sectional transmission.
8. The multi-machine communication method based on the system bus as claimed in claim 6, wherein the multi-machine communication method further comprises:
slave address allocation mode:
and judging whether the slave machine distribution address in the received address distribution instruction is matched with the local address, if so, writing the local address of the monitored normal slave machine into the local monitoring address, and enabling the slave machine to work in a bus data interaction mode or a synchronous monitoring acquisition mode.
9. The multi-machine communication method based on the system bus as claimed in claim 8, wherein the multi-machine communication method further comprises:
slave dynamic address allocation mode:
and judging whether the pre-allocated address of the slave machine in the received address allocation instruction is matched with the local address, and if so, writing the dynamic address into the monitoring address.
10. The multi-machine communication method based on the system bus as claimed in claim 6, wherein the multi-machine communication method further comprises:
bus data interaction mode:
after the current bus data is written into the local computer or read out from the local computer, corresponding confirmation information is returned;
synchronous listening acquisition mode:
no information is returned after the current bus data is written locally.
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