CN101425877A - Method for inter-module communication - Google Patents
Method for inter-module communication Download PDFInfo
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- CN101425877A CN101425877A CNA2008103058437A CN200810305843A CN101425877A CN 101425877 A CN101425877 A CN 101425877A CN A2008103058437 A CNA2008103058437 A CN A2008103058437A CN 200810305843 A CN200810305843 A CN 200810305843A CN 101425877 A CN101425877 A CN 101425877A
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Abstract
The invention relates to the multimedia technology, and solves the problems that no error detecting mechanism is available in communication among modules, so that the command and data can not be divided. The invention provides a method for communicating among modules and adopts the technical proposal that firstly, each module is provided with a pre-reserved general communication interface; in use, the modules need to communicate are connected by the general communication interface, and corresponding parameters of the general purpose communication interface are set so as to cause the modules to communicate normally with each other through the general communication interface. The communication data are transmitted and received in form of data packet. The data packet comprises a packet header, the data content and an end bit, wherein the packet header comprises an initial identifier, data types, the data size and a parity bit. After receiving the data packet, the module checks the data packet according to the packet header in the data packet; and if error occurs, no data can be processed. The invention has the advantages that the efficiency of the system can be enhanced to avoid confusion so as to be suitable for the communication among multimedia modules.
Description
Technical field
The present invention relates to multimedia technology, particularly the technology of communication between multi-media module.
Background technology
The E-consumer series products makes rapid progress at present, constantly the new product of releasing has increased many new functions, but new product all is identical with the most of function of original product, have only partial function to have and improve and increase, for product design, new product can redesign, and also can increase new functional module on original design basis.Redesign new product, then all needs of work start anew, and the structure of choosing software systems from hardware platform requires a great deal of time and capital.And newly-increased function much can adopt modularized design, so on original design basis, increase new functional module, then can save a large amount of time and efforts, hardware designs and software architecture do not need big modification, only need new functional module is incorporated in the system, communications protocol by appointment and mode interactive information, finish communication and control etc., and just simple order and the data of sending of existing inter-module communication, there is not error-detection mechanism, if order is in the same place with data mixing, just can't effectively make a distinction, if primary module and a plurality of inter-module communication, several modules have identical order, in the time of data, just can't effectively recognize order and data which intermodule the end is, and the module that increases is many more, and the order of transmission and data are many more, just needs to increase different definition, the condition that then needs to judge will be many more, influence the efficient of system.
Summary of the invention
Technical problem to be solved by this invention does not have error-detection mechanism in order to solve existing inter-module communication exactly, can't separately order the shortcoming with data, and a kind of method of inter-module communication is provided.
The present invention solves its technical problem, and the technical scheme of employing is that a kind of method of inter-module communication is characterized in that, may further comprise the steps:
A. on each module, reserve general-purpose communication interface, will need the module of communication to connect during use by general-purpose communication interface;
B. set the relevant parameter of general-purpose communication interface, so that can carry out normal communication by general-purpose communication interface between the module;
C. communication data all adopts the form of packet to carry out the transmission and the reception of data, and packet comprises packet header, data content, stop bits, and its middle wrapping head comprises origin identification, data type, size of data, check digit;
D. module is tested to packet according to the packet header in the packet after receiving packet, if wrong, then disregards;
Concrete, the described general-purpose communication interface of step a is the UART mouth;
Further, the described relevant parameter of step b comprises baud rate, parity check, data bit, position of rest, data flow con-trol.
The invention has the beneficial effects as follows, can when intermodule carries out communication, packet be tested, and distinguish order and data that the efficient of raising system is also avoided confusion by the packet header in the packet by above-mentioned steps.
Description of drawings
Fig. 1 is the system flow chart of embodiment.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
The invention provides a kind of method of inter-module communication, at first on each module, reserve general-purpose communication interface, to need the module of communication to connect during use by general-purpose communication interface, and set the relevant parameter of general-purpose communication interface, so that can carry out normal communication by general-purpose communication interface between the module, communication data all adopts the form of packet to carry out the transmission and the reception of data, packet comprises packet header, data content, stop bits, its middle wrapping head comprises origin identification, data type, size of data, check digit, module is after receiving packet, according to the packet header in the packet packet is tested,, then disregard if wrong.
Embodiment
This routine general-purpose communication interface is an example with the UART mouth, reserves the UART mouth on each module, will need each module of communication to interconnect its system flow such as Fig. 1 by the UART mouth.
According to actual needs, intermodule sets baud rate (Baud Rate), parity check (Parity), data bit (Data bits), position of rest (Stop bits), the data flow con-trol parameters such as (Flow Control) of UART, so that can carry out normal communication by UART.
Communication data all adopts the form of packet to carry out the transmission and the reception of data, packet is made up of packet header, data content, stop bits three parts, wherein data content is an information packet, be used for realizing various functions, concrete function and data, can carry out self-definedly according to the actual needs, be used for carrying out the transmission etc. of the mutual and order of data, the scope of data length is 0 to 26; Stop bits is the end mark of packet, takies a Byte, gets fixed value 0xFF; Packet header adopts the data of fixed size to form, comprise origin identification, data type, size of data, check digit, origin identification is fixed, it is the beginning flag of a Frame, if this sign of the data-bag lost of being received, prove that so this packet is invalid, to not do any processing, the type of data type unlabeled data, be used for determining the type of various data, can be used to indicate is information interaction or control command etc., can define according to actual needs and realize, size of data is to be used for the size of unlabeled data content, can relatively come the integrality of specified data content according to the size of this value and the actual data content of receiving, check digit is to be used for the complete validity of checking data bag, the calculation check position is that the original position BYTEO from packet begins to finish to stop bits, just earlier with checksum location 0, one and S will be obtained then after all byte additions, check digit=0xFF-S+1, with being 0 with value after each the data addition in the packet,, then be correct if all bit data add up to 0 in the packet, otherwise show that the packet of receiving is wrong, then disregard.
Because the software engineering in the technical solution of the present invention all belongs to this area routine techniques, no longer describe in detail herein.Those of ordinary skill in the art according to foregoing description, can adopt various software approachs to realize technical scheme of the present invention, and it all belongs to protection scope of the present invention.
Claims (3)
- The method of [claim 1] a kind of inter-module communication is characterized in that, may further comprise the steps:A. on each module, reserve general-purpose communication interface, will need the module of communication to connect during use by general-purpose communication interface;B. set the relevant parameter of general-purpose communication interface, so that can carry out normal communication by general-purpose communication interface between the module;C. communication data all adopts the form of packet to carry out the transmission and the reception of data, and packet comprises packet header, data content, stop bits, and its middle wrapping head comprises origin identification, data type, size of data, check digit;D. module is tested to packet according to the packet header in the packet after receiving packet, if wrong, then disregards.
- [claim 2] is characterized in that according to the method for the described a kind of inter-module communication of claim 1, and the described general-purpose communication interface of step a is the UART mouth.
- [claim 3] is characterized in that according to the method for the described a kind of inter-module communication of claim 2, and the described relevant parameter of step b comprises baud rate, parity check, data bit, position of rest, data flow con-trol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008103058437A CN101425877A (en) | 2008-11-28 | 2008-11-28 | Method for inter-module communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008103058437A CN101425877A (en) | 2008-11-28 | 2008-11-28 | Method for inter-module communication |
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| CN101425877A true CN101425877A (en) | 2009-05-06 |
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| CNA2008103058437A Pending CN101425877A (en) | 2008-11-28 | 2008-11-28 | Method for inter-module communication |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104440A (en) * | 2009-12-18 | 2011-06-22 | 北京华控技术有限责任公司 | Method for implementing communications between intelligent actuating mechanisms and field buses |
| CN103901839A (en) * | 2014-03-04 | 2014-07-02 | 清华大学 | Communication method and system of unmanned aerial vehicle |
| CN104486034A (en) * | 2014-12-08 | 2015-04-01 | 江西洪都航空工业集团有限责任公司 | RS422/485 serial port communication data packaging method |
| CN111399435A (en) * | 2020-03-20 | 2020-07-10 | 重庆成峰水务工程有限责任公司 | Intelligent pump room data acquisition terminal |
-
2008
- 2008-11-28 CN CNA2008103058437A patent/CN101425877A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104440A (en) * | 2009-12-18 | 2011-06-22 | 北京华控技术有限责任公司 | Method for implementing communications between intelligent actuating mechanisms and field buses |
| CN103901839A (en) * | 2014-03-04 | 2014-07-02 | 清华大学 | Communication method and system of unmanned aerial vehicle |
| CN103901839B (en) * | 2014-03-04 | 2018-02-09 | 清华大学 | The communication means and system of unmanned plane |
| CN104486034A (en) * | 2014-12-08 | 2015-04-01 | 江西洪都航空工业集团有限责任公司 | RS422/485 serial port communication data packaging method |
| CN104486034B (en) * | 2014-12-08 | 2017-12-01 | 江西洪都航空工业集团有限责任公司 | A kind of RS422/485 serial port communication datas group bag method |
| CN111399435A (en) * | 2020-03-20 | 2020-07-10 | 重庆成峰水务工程有限责任公司 | Intelligent pump room data acquisition terminal |
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Open date: 20090506 |