CN108052477A - The method for eliminating the interference of RS422 serial ports - Google Patents
The method for eliminating the interference of RS422 serial ports Download PDFInfo
- Publication number
- CN108052477A CN108052477A CN201711205983.2A CN201711205983A CN108052477A CN 108052477 A CN108052477 A CN 108052477A CN 201711205983 A CN201711205983 A CN 201711205983A CN 108052477 A CN108052477 A CN 108052477A
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- CN
- China
- Prior art keywords
- serial ports
- data
- serial
- interference
- register
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/10—Program control for peripheral devices
- G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
Abstract
The present invention relates to the technologies of RS422 serial ports.The interference that the present invention can generate when solving serial ports transceiving data, the problem of causing serial ports that can not work normally, serious influence is caused to product reliability, it is proposed that a kind of method for eliminating the interference of RS422 serial ports, technical solution can be summarized as：Start application program, by initialization of (a) serial ports；Serial data is sent to serial ports transmitting terminal inside application program, after serial ports transmitting terminal receives serial data, serial data is sent in transmitter register according to serial port protocol；When serial ports transmitting terminal is sent out required serial data, after serial ports receiving terminal receives corresponding data, and judge whether comprising interference data in corresponding data, if then all reading the interference data in receiving register, remove the space of receiving register shared by interference data.The invention has the advantages that by the way that the interference being stored in receiving register data are emptied, receiving register is avoided to be filled with, the problem of so as to cannot respond to serial ports transmitter register.
Description
Technical field
The present invention relates to RS422 Serial technologies, more particularly to eliminate the technology that RS422 serial ports disturbs.
Background technology
In daily project development and design, the interference of serial ports transceiving data generation is frequently encountered, causes serial ports can not
Normal work, serious influence is caused to product reliability；Causing the common interference source that serial ports disturbs has：Accept as unavoidable serial ports and send number
According to interference caused by line (TX+, TX-), other signals receive (RX+, RX-) caused interference close to serial ports, and build-out resistor does not conform to
Resonance interference etc. caused by suitable.
The method that tradition eliminates interference has：Isolate interference signal by way of additional shielding line, incited somebody to action by pull down resistor
Interference signal eliminate on the ground or by software enable the modes such as serial ports solve serial ports disturb mode.The solution by way of shielding
The certainly crosstalk on transmission line, but the crosstalk for being begun to from circuit board end are that can not complete or cannot be completely clear by shielding
Chu's interference.When the mode that software serial ports enables can cause height output frequency, serial ports forbidden energy enables gap and serial ports is caused to send number
The problem of according to losing.When sending out data due to serial ports, data are to indicate data, in level change, the height of generation with level change
Low pulse, is radiate by space or transmission line, is caused to receive on transmission line inducing level change, is passed back to serial ports reception
End, when level is sufficiently more than the thresholding of high level, will indicate to receive data in serial ports receiving register, without to string
Mouth receiving register operation, will result in serial ports receiving register and fills, and influence serial ports normal work.When on serial ports TX+ and TX-
It when having the pulse that data generate, can be crosstalked on RX+ and RX-, just there is interference data buffer storage to exist in serial ports receiving register at this time
The inside.
The content of the invention
The object of the present invention is to provide a kind of methods for eliminating the interference of RS422 serial ports, solve to produce during serial ports transceiving data
Raw interference, the problem of causing serial ports that can not work normally, serious influence is caused to product reliability.
The present invention solves its technical problem, the technical solution adopted is that：The method for eliminating the interference of RS422 serial ports, feature
It is, comprises the following steps：
Step 1 starts application program, by initialization of (a) serial ports；
Serial data is sent to serial ports transmitting terminal inside step 2, application program, serial ports transmitting terminal receives serial data
Afterwards, serial data is sent in transmitter register according to serial port protocol；
Step 3, when serial ports transmitting terminal be sent out needed for serial data when, serial ports receiving terminal will receive corresponding data,
After serial ports receiving terminal receives corresponding data, corresponding data is stored in receiving register, and judge in corresponding data whether
Comprising interference data, if then entering step 4, otherwise without processing；
Step 4, all the interference data in reading receiving register, remove receiving register shared by interference data
Space.
Specifically, it is described to enable initialization of (a) serial ports process including serial ports configuration, serial ports opening and serial ports in step 1, institute
State serial ports configuration, serial ports is opened and serial ports enables equal Exactly-once.
The invention has the advantages that the method disturbed by above-mentioned elimination RS422 serial ports, is posted by that will be stored in reception
Interference data in storage empty, and receiving register is avoided to be filled with, the problem of so as to cannot respond to serial ports transmitter register.
Specific embodiment
With reference to embodiment, detailed description of the present invention technical solution.
The method of the present invention for eliminating the interference of RS422 serial ports, comprises the steps of：
Step 1 starts application program, by initialization of (a) serial ports；
Serial data is sent to serial ports transmitting terminal inside step 2, application program, serial ports transmitting terminal receives serial data
Afterwards, serial data is sent in transmitter register according to serial port protocol；
Step 3, when serial ports transmitting terminal be sent out needed for serial data when, serial ports receiving terminal will receive corresponding data,
After serial ports receiving terminal receives corresponding data, corresponding data is stored in receiving register, and judge in corresponding data whether
Comprising interference data, if then entering step 4, otherwise without processing；
Step 4, all the interference data in reading receiving register remove the sky of receiving register shared by interference data
Between.
Embodiment
The method that the embodiment of the present invention eliminates the interference of RS422 serial ports, including lower step：
Step 1 starts application program, by initialization of (a) serial ports；
Serial data is sent to serial ports transmitting terminal inside step 2, application program, serial ports transmitting terminal receives serial data
Afterwards, serial data is sent in transmitter register according to serial port protocol；
Step 3, when serial ports transmitting terminal be sent out needed for serial data when, serial ports receiving terminal will receive corresponding data,
After serial ports receiving terminal receives corresponding data, corresponding data is stored in receiving register, and judge in corresponding data whether
Comprising interference data, if then entering step 4, otherwise without processing；
Step 4, all the interference data in reading receiving register remove the sky of receiving register shared by interference data
Between.
In the above method, in step 1, by initialization of (a) serial ports process preferably includes serial ports configuration, serial ports is opened and serial ports
It is enabled, wherein, serial ports configuration, serial ports are opened and serial ports enables equal Exactly-once.
Claims (2)
1. eliminate the method for RS422 serial ports interference, which is characterized in that comprise the following steps：
Step 1 starts application program, by initialization of (a) serial ports；
Inside step 2, application program serial data, after serial ports transmitting terminal receives serial data, root are sent to serial ports transmitting terminal
Serial data is sent in transmitter register according to serial port protocol；
Step 3, when serial ports transmitting terminal be sent out needed for serial data when, serial ports receiving terminal will receive corresponding data, serial ports
After receiving terminal receives corresponding data, corresponding data is stored in receiving register, and judges whether included in corresponding data
Data are disturbed, if then entering step 4, otherwise without processing；
Step 4, all the interference data in reading receiving register remove the sky of receiving register shared by interference data
Between.
2. the method according to claim 1 for eliminating the interference of RS422 serial ports, which is characterized in that described to go here and there in step 1
Mouth initialization procedure includes serial ports configuration, serial ports is opened and serial ports enables, and the serial ports configuration, serial ports opening and serial ports enable
Exactly-once.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711205983.2A CN108052477A (en) | 2017-11-27 | 2017-11-27 | The method for eliminating the interference of RS422 serial ports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711205983.2A CN108052477A (en) | 2017-11-27 | 2017-11-27 | The method for eliminating the interference of RS422 serial ports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108052477A true CN108052477A (en) | 2018-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711205983.2A Pending CN108052477A (en) | 2017-11-27 | 2017-11-27 | The method for eliminating the interference of RS422 serial ports |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101751291A (en) * | 2009-12-30 | 2010-06-23 | 广东威创视讯科技股份有限公司 | Method of sharing one serial port by application programs and device |
| CN102629240A (en) * | 2012-02-13 | 2012-08-08 | 上海创远仪器技术股份有限公司 | Method and device for serial communication |
| CN103918206A (en) * | 2011-11-08 | 2014-07-09 | 马维尔国际贸易有限公司 | Methods and apparatus for mitigating known interference |
| CN104616467A (en) * | 2014-11-12 | 2015-05-13 | 江苏大学 | Electric vehicle braking energy recovery system data acquisition method |
| US20160014270A1 (en) * | 2002-08-08 | 2016-01-14 | Global Tel*Link Corp. | Telecommunication call management and monitoring system with voiceprint verification |
-
2017
- 2017-11-27 CN CN201711205983.2A patent/CN108052477A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160014270A1 (en) * | 2002-08-08 | 2016-01-14 | Global Tel*Link Corp. | Telecommunication call management and monitoring system with voiceprint verification |
| CN101751291A (en) * | 2009-12-30 | 2010-06-23 | 广东威创视讯科技股份有限公司 | Method of sharing one serial port by application programs and device |
| CN103918206A (en) * | 2011-11-08 | 2014-07-09 | 马维尔国际贸易有限公司 | Methods and apparatus for mitigating known interference |
| CN102629240A (en) * | 2012-02-13 | 2012-08-08 | 上海创远仪器技术股份有限公司 | Method and device for serial communication |
| CN104616467A (en) * | 2014-11-12 | 2015-05-13 | 江苏大学 | Electric vehicle braking energy recovery system data acquisition method |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180518 |