CN101631148A - Communication method for allocating dynamic addresses in serial communication protocols - Google Patents
Communication method for allocating dynamic addresses in serial communication protocols Download PDFInfo
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Abstract
The invention relates to a communication method for allocating dynamic addresses in serial communication protocols. A host system and a slave system are communicated in the following mode: broadcasting an address request, sending out an output port signal; and receiving an input port signal. The host system and the slave system are connected in a topological serial structure to realize port extension. The communication method can also realize the functions of the host system of dynamically adding and deleting a slave computer address.
Description
Technical field
The present invention relates to the industrial communication technical field, concrete relate to a kind of communication means of in serial communication protocol, realizing the address dynamic assignment.
Background technology
Under industrial environment, because the hardware port number is limited, existing input/output port (I/O mouth) number deficiency consequently can not satisfy the control requirement, at this moment often just need under the situation of the original hardware of less change port be expanded sometimes.How to design that a kind of to take port few, but the Extended Capabilities Port number is many, and can carry out real-time interpolation to the address of the slave that inserts, deletion is a problem to be solved by this invention.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the defective that exists in the existing current techique, and the communication means of address dynamic assignment in a kind of serial communication protocol is provided.Can utilize serial communication expanding system port number under the situation that only changes a small amount of hardware, the dynamic assignment slave addresses is added the deletion slave addresses in real time.
In order to address the above problem technical scheme of the present invention is such:
The communication means of address dynamic assignment in the serial communication protocol includes a host computer system and the slave system that is made of a plurality of slaves that is connected with host computer system in the serial communication protocol, it is characterized in that host computer system and slave system are communicated by following mode:
The broadcast address request
Host computer system at first sends the 0xAO request toward slave system, certain is sent out 0xBX from chance (X is 16 system numbers in the slave system, back-signalling down together), expression prepares to receive main frame institute addresses distributed, main frame sends the 0xCX address signal then, certain slave continues to respond the 0xBX signal in the slave system, and presentation address is allocated successfully;
Send the output port signal
Main frame at first sends the 0xDX request toward slave system, in the slave system corresponding address send the 0xBX back-signalling from chance, expression prepares to receive the output port signal of main frame, main frame sends to all port signals that will export the slave of corresponding address then;
Receive the input port signal
Main frame at first sends the 0xEX request toward slave system, in the slave system corresponding address send the 0xBX back-signalling from chance, expression is ready for sending the input port signal and gives main frame, slave sends to main frame with all input signals then.
Described host computer system adopts topological formula serial structure to be connected with slave, and promptly host computer system connects two slaves, two slaves several slaves of respectively connecting.This kind connected mode can realize port extension.
Host computer system is when each slave of visit, slave all can be given main frame with the feedback information that whether is connected to slave on the slave port by answer signal, main frame will be learnt the connection situation of slave network after visiting all slaves that now inserted, main frame can be set up a net list that connects about the slave network in program in view of the above, and behind all slaves of visit this table is being revised renewal, interpolation and deletion slave node, thereby reach dynamic assignment, interpolation and the deletion of slave addresses at every turn.
Beneficial effect, technical solutions according to the invention, utilize the topological structure connected mode of serial communication to solve the problem of port expansion, adopt broadcast address, sent the output port signal, received three kinds of communication processs of input port signal, make main frame intercom mutually, and can also realize the dynamic interpolation and the delete function of slave addresses with slave.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the schematic diagram of communication process of the present invention;
Fig. 2 is the schematic diagram that main frame of the present invention is connected with the slave topological structure;
Fig. 3 is for being the interface schematic diagram of slave addresses request logic chip of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
In the present embodiment, the system communication baud rate is 113636baud/s, and each byte transmission needs 88us.In whole communication process, one co-exists in 3 kinds of communication processs, and they are respectively: broadcast address, transmission output port signal, reception input port signal.
This communication protocol cue has:
0xAO: toward the bus broadcast Address requests;
0xDx: send the output port request toward x address slave, the x scope is 0～8;
0xEx: send the input port request toward x address slave, the x scope is 0～8;
0xBx: answer signal, when slave receives request, represent the slave downlink port to have or not slave to connect for the 0th of x, this position is that the no slave of ' 0 ' representative connects, for having slave, ' 1 ' representative connects, can know the connection situation of slave network according to this main frame, add, the deletion network node, and then the slave that upgrades in the main frame connects table.
0xCx: address signal, the address that the x representative is concrete
In this communication, consider communications anti-jamming and encryption, all signals all must carry out verification by radix-minus-one complement, and communication XOR sign indicating number is 0x35.
As shown in Figure 1, system communication one is divided into 3 types communication.
The broadcast address request.Main frame at first sends the 0xAO request toward slave system, and certain sends out the 0xBX back-signalling from chance in the slave system, and expression prepares to receive main frame institute addresses distributed.Main frame sends the 0xCX address signal then, and certain slave continues to respond the 0xBX signal in the slave system, and presentation address is allocated successfully.
Send the output port signal.The at first past slave system transmission of main frame 0xDX request, corresponding address sends the 0xBX back-signalling from chance, the output port signal of expression preparation reception main frame in the slave system.Main frame sends to all port signals that will export the slave of corresponding address then.
Receive the input port signal.Main frame at first sends the 0xEX request toward slave system, in the slave system corresponding address send the 0xBX back-signalling from chance, expression is ready for sending the input port signal and gives main frame.Slave sends to main frame with all input signals then.
The address is dynamically added and the delete function implementation method is: main frame is when each slave of visit, slave all can be given main frame with the feedback information that whether is connected to slave on the slave port by answer signal, main frame will be learnt the connection situation of slave network after visiting all slaves that now inserted, main frame can be set up a net list that connects about the slave network in program in view of the above, and behind all slaves of visit this table is being revised renewal, interpolation and deletion slave node, thereby reach dynamic assignment, interpolation and the deletion of slave addresses at every turn.
Referring to Fig. 2,1 is main frame among the figure, and main frame 1 is connected with a plurality of slave topological structures, and promptly main frame 1 connects slave 2 and 6, slave 2 series connection 3,4,5 then, slave 6 series connection 7,8,9; And each slave system can also continue to add slave, to reach the purpose of Extended Capabilities Port.
Referring to Fig. 3, be provided with slave addresses request logic chip between the slave that adjoins each other.4,5,6,7 is input port in this chip, and 14,15,16 is output port, wherein:
REQ1: port one address request signal
LIVE1: whether port one is connected to from being information
REQ2: port one address request signal
LIVE2: whether port one is connected to from being information
EN1: enable to be connected on the slave receiver address signal on the port one
EN2: enable to be connected on the slave receiver address signal on the port 2
MCUREQ: this machine is to upper level clump machine request address signal
Logic chip is: ATF16V8B
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1, the communication means of address dynamic assignment in the serial communication protocol, include a host computer system and the slave system that constitutes by a plurality of slaves that is connected with host computer system in the serial communication protocol, it is characterized in that host computer system and slave system are communicated by following mode:
The broadcast address request
Host computer system at first sends the 0xA0 request toward slave system, certain sends out the 0xBX back-signalling from chance in the slave system, and expression prepares to receive main frame institute addresses distributed, and main frame sends the 0xCX address signal then, certain slave continues to respond the 0xBX signal in the slave system, and presentation address is allocated successfully;
Send the output port signal
Main frame at first sends the 0xDX request toward slave system, in the slave system corresponding address send the 0xBX back-signalling from chance, expression prepares to receive the output port signal of main frame, main frame sends to all port signals that will export the slave of corresponding address then;
Receive the input port signal
Main frame at first sends the 0xEX request toward slave system, in the slave system corresponding address send the 0xBX back-signalling from chance, expression is ready for sending the input port signal and gives main frame, slave sends to main frame with all input signals then.
2, the communication means of address dynamic assignment in the serial communication protocol according to claim 1, it is characterized in that, described host computer system adopts topological formula serial structure to be connected with slave, and promptly host computer system connects two slaves, two slaves several slaves of respectively connecting.
3, the communication means of address dynamic assignment in the serial communication protocol according to claim 1, it is characterized in that, host computer system is when each slave of visit, slave all can be given main frame with the feedback information that whether is connected to slave on the slave port by answer signal, main frame will be learnt the connection situation of slave network after visiting all slaves that now inserted, main frame can be set up a net list that connects about the slave network in program in view of the above, and behind each all slaves of visit, this table is revised renewal, add and deletion slave node, thereby reach the dynamic assignment of slave addresses, add and deletion.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012058875A1 (en) * | 2010-11-03 | 2012-05-10 | 中兴通讯股份有限公司 | Method and system for serial communication |
| CN102868780A (en) * | 2012-09-07 | 2013-01-09 | 深圳睿立方智能科技有限公司 | RS-485 slave computer addressing network system and addressing method thereof |
| CN105242601A (en) * | 2015-10-09 | 2016-01-13 | 贵州智达科技有限责任公司 | Multi-compatibility bidirectional communication protocol of serial port of electric warming oven |
| CN105260337A (en) * | 2015-11-02 | 2016-01-20 | 深圳市共济科技有限公司 | Automatic addressing method and system of single-chip microcomputers |
| CN106200454A (en) * | 2016-06-21 | 2016-12-07 | 沈阳东软医疗系统有限公司 | The communication system of a kind of many MCU and method |
| CN107071076A (en) * | 2016-12-23 | 2017-08-18 | 京信通信技术(广州)有限公司 | Device address collocation method in communication system, device and system |
| CN110247997A (en) * | 2019-06-26 | 2019-09-17 | 三维通信股份有限公司 | The method, apparatus and storage medium of IP address distribution and Topology Management in DAS system |
| CN114936180A (en) * | 2022-06-20 | 2022-08-23 | 苏州智而卓数字科技有限公司 | Automatic generation method and device for serial bus equipment address and storage medium |
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| CN101145950A (en) * | 2007-04-25 | 2008-03-19 | 中兴通讯股份有限公司 | A topology management method based on multi-service transmission node |
| CN101477506A (en) * | 2008-01-04 | 2009-07-08 | 鸿富锦精密工业（深圳）有限公司 | Addressing system and method of master equipment to slave equipment |
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| CN101145950A (en) * | 2007-04-25 | 2008-03-19 | 中兴通讯股份有限公司 | A topology management method based on multi-service transmission node |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012058875A1 (en) * | 2010-11-03 | 2012-05-10 | 中兴通讯股份有限公司 | Method and system for serial communication |
| CN102868780A (en) * | 2012-09-07 | 2013-01-09 | 深圳睿立方智能科技有限公司 | RS-485 slave computer addressing network system and addressing method thereof |
| CN105242601A (en) * | 2015-10-09 | 2016-01-13 | 贵州智达科技有限责任公司 | Multi-compatibility bidirectional communication protocol of serial port of electric warming oven |
| CN105242601B (en) * | 2015-10-09 | 2018-05-08 | 贵州智达科技有限责任公司 | A kind of more compatible both-way communication methods of electric heater serial ports |
| CN105260337A (en) * | 2015-11-02 | 2016-01-20 | 深圳市共济科技有限公司 | Automatic addressing method and system of single-chip microcomputers |
| CN105260337B (en) * | 2015-11-02 | 2018-03-02 | 深圳市共济科技股份有限公司 | A kind of automatic addressing method and system of single-chip microcomputer |
| CN106200454A (en) * | 2016-06-21 | 2016-12-07 | 沈阳东软医疗系统有限公司 | The communication system of a kind of many MCU and method |
| CN107071076A (en) * | 2016-12-23 | 2017-08-18 | 京信通信技术(广州)有限公司 | Device address collocation method in communication system, device and system |
| CN110247997A (en) * | 2019-06-26 | 2019-09-17 | 三维通信股份有限公司 | The method, apparatus and storage medium of IP address distribution and Topology Management in DAS system |
| CN114936180A (en) * | 2022-06-20 | 2022-08-23 | 苏州智而卓数字科技有限公司 | Automatic generation method and device for serial bus equipment address and storage medium |
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