CN106569440A - Method for achieving communication between microprocessor and touch screen based on MODBUS-RTU protocol - Google Patents
Method for achieving communication between microprocessor and touch screen based on MODBUS-RTU protocol Download PDFInfo
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- CN106569440A CN106569440A CN201610937257.9A CN201610937257A CN106569440A CN 106569440 A CN106569440 A CN 106569440A CN 201610937257 A CN201610937257 A CN 201610937257A CN 106569440 A CN106569440 A CN 106569440A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The invention discloses a method for achieving communication between a microprocessor and a touch screen based on an MODBUS-RTU protocol, and the method comprises the steps that S1, the microprocessor collects the data detected by a sensor system; S2, the microprocessor transmits the data to the touch screen through the MODBUS-RTU protocol. The method enables the communication between the processor and the touch screen to be smoother in a transmission mode through a specific MODBUS-RTU transmission data frame. Meanwhile, because all data received by the microprocessor is converted into a transmission format needed by the MODBUS-RTU protocol, the method is enabled to be better in expansibility and transportability.
Description
Technical field
The present invention relates to communication technique field, more particularly to one kind is based on MODBUS-RTU protocol realizations microprocessor and touches
The method for touching screen communication
Background technology
At present, various industrial field bus are widely used in the control of all types of industries field process, improve industry
The real-time and reliability of data collecting system.
MODBUS-RTU agreements so that it is simple, efficiently, open, free, reliability and the advantages of grow with each passing hour, in work
Factory's automatic field, is widely used by each producer, shows its powerful vitality and vigor.
Simultaneously in order to realize touch screen to governor circuit monitor in real time, display and same management, need to give birth to different vendor
The data acquisition equipment of product interconnects to form network, realizes to data monitoring, the networking for showing.
The Chinese patent of Publication No. CN104656604A, open one kind " realizes man-machine friendship using MODBUS communication protocols
Mutual safety and stability control device of electric network and its method ", it is set to man machine interface to support serial ports MODBUS communication protocols
Touch screen, data transfer adopts serial link MODBUS transmission means, but it arranges multiple Interruptions and causes transmission data
Slowly, it is unfavorable for that data are smoothly transmitted.
The content of the invention
The technical problem to be solved is, for the above-mentioned deficiency of prior art, proposes a kind of data transfer
Fast, be capable of achieving different vendor data acquisition equipment formed network and with preferable autgmentability and portability based on
The method that MODBUS-RTU protocol realizations microprocessor is communicated with touch screen.
It is to propose that one kind is micro- based on MODBUS-RTU protocol realizations that the present invention solves the technical scheme of its technical problem employing
The method that processor is communicated with touch screen, it includes step：
S1：The data that microprocessor collecting sensor system detectio is arrived；
S2：Microprocessor sends data to touch screen by MODBUS-RTU agreements.
Further, the sensing system includes：Voltage sensor, current sensor, temperature sensor and/or smog
Sensor.
Further, the microprocessor by the Data Format Transform for receiving be a frame data by address field, function code,
The data form that data segment and check code are constituted.
Further, step S2 also comprises the steps：
S21：Initialization；
S22：Detect whether that serial ports interrupts, if removing to interrupt without if flag bit is received, data are terminated if having and is sent out
Send；
S23：The data that process is received, judge whether station number is 1, and whether data length goes beyond the scope；If station number is not 1
Or data length goes beyond the scope, empty the data that receive and point out mistake；If station number is 1 and data length is without departing from scope,
Then continue to until receiving enough frame data；
S24：Whether the CRC check position that detection sends is equal to the CRC check position for calculating, if being not equal to, empties what is received
Data simultaneously point out mistake；
S25：It is judged as reading holding register order or preset single register command；
S26：Send data；
S27：Detect whether to distribute, if not distributing, return to step S22.
Further, the analogue signal for detecting is converted to digital signal by the sensing system by AD conversion system
And be stored in microprocessor.
Further, the microprocessor is STM32F103 microprocessors.
Further, the address field is 1 byte, and function code is 1 byte, and data segment is 0-252 byte, is verified
Code is 1 byte.
Further, the transmission time of at least 3.5 bytes is spaced between every frame data；It is described per in frame data each
Transmission time of the interval less than 1.5 bytes between byte.
The present invention is by specific MODBUS-RTU transmitting data frames and transmission means so that microprocessor and touch screen it
Between communication it is more smoothly；Simultaneously because all of data that microprocessor is received are converted into the biography needed for MODBUS-RTU
Transport format so that the autgmentability and portability of the application is more preferably.
Description of the drawings
Fig. 1 is the population structure block diagram of the application；
Fig. 2 is the application data transfer flow process figure.
Specific embodiment
The following is the specific embodiment of the present invention and combine accompanying drawing, technical scheme is further described,
But the present invention is not limited to these embodiments.
Refer to Fig. 1, the system master communicated based on MODBUS-RTU protocol realizations microprocessor and touch screen of the application
To be made up of microprocessor, the sensing system being made up of multiple sensors and the part of touch screen three.
Temperature sensor, Smoke Sensor, voltage sensor, current sensor are included in sensing system, certainly also
Other sensors can be set.Those sensors are mainly used in the parameters in collection site environment.Those sensor acquisition
To current signal digital signal is converted into after AD conversion and is stored in the inside FLASH of microprocessor.
Microprocessor can also receive other data, such as in the application actual application, energy-storage system passes through CAN
The data sent, and the IO make-and-break signals of each relay.
By the data is activation for receiving to touch screen by two-way communication between microprocessor and touch screen, microprocessor,
Also the control instruction sent by touch screen can be received.
In the present embodiment, MODBUS-RTU agreement two-way communications are passed through between microprocessor and touch screen.
In the present embodiment, microprocessor preferably adopts STM32F103 microprocessors.
Before a communication, need that the data of microprocessor internal are converted to the data form needed for MODBUS-RTU.This
In embodiment, every frame data are converted to the data form being made up of address field, function code, data segment and check code.Wherein
It is 1 byte for 0-252 byte, check code for 1 byte, data segment that location domain is 1 byte, function code.
For the ease of subsequent data transmission, prevent occurring error of transmission between Frame and Frame, also limit in the application
Determine between Frame and Frame, and the transmission time between each byte in Frame inside.In the present embodiment, Frame with
Transmission time between Frame should be at least above the transmission time of 3.5 bytes, and the transmission time between each byte of frame in should
Less than the transmission time of 1.5 bytes.The restriction of above-mentioned transmission time, be applicant combine sensor type and
MODBUS-RTU protocol transmissions characteristic is through a large amount of creative works gained.Can be caused by the restriction of above-mentioned transmission time be
System can have preferable transfer rate can prevent data from misdeeming again, data-crosstalk the problems such as generation.
The means of communication between microprocessor and touch screen are concrete as shown in Figure 2：
It comprises the steps：
Initialization；
Using MODBUS_init () initialization function, to systematic parameter initialization, communication serial port initialization and the string that communicates
Mouth interrupts initialization.
Detect whether that serial ports interrupts, if removing to interrupt without if flag bit is received, data is activation is terminated if having；
Above-mentioned functions are realized by USART2_IRQHandler () function, anti-locking system is constantly in during interruption.
The data that process is received, judge whether station number is 1, and whether data length goes beyond the scope；If station number for 1 or
Data length goes beyond the scope, and empties the data that receive and points out mistake；If station number is 1 and data length is without departing from scope, after
Continued access is received until receiving enough frame data；
The data received by MODBUS-RCV () function start to process.During receiving data, can also pass through upper
Frame and Frame are stated, the transmission time of byte comes whether continuous verification data transmission is interrupted and data between Frame
Integrity.
After receiving enough frame data, detect whether the CRC check position in the Frame for receiving is equal to the CRC check for calculating
Position, if being not equal to, empties the data that receive and points out mistake；
It is judged as reading holding register order or preset single register command according to Frame；
Send data；
Detect whether to distribute, if not distributing, return detects whether that serial ports interrupts.
In the present embodiment, communicated by MODBUS-RTU protocol realizations microprocessor and man machine interface, ensureing program work(
Can realize simultaneously, taking into full account the autgmentability and transplantability of program.Suitably modified just can making with above-mentioned is done in other designs
Method.Solve development amount in prior art big, the complicated problem of code maintenance.
Specific embodiment described herein is only explanation for example spiritual to the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications to described specific embodiment or supplement or replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (8)
1. it is a kind of based on MODBUS-RTU protocol realizations microprocessor and touch screen communication method, it is characterised in that：Including step
Suddenly：
S1：The data that microprocessor collecting sensor system detectio is arrived；
S2：Microprocessor sends data to touch screen by MODBUS-RTU agreements.
2. it is according to claim 1 based on MODBUS-RTU protocol realizations microprocessor and touch screen communication method, its
It is characterised by：The sensing system includes：Voltage sensor, current sensor, temperature sensor and/or Smoke Sensor.
3. it is according to claim 1 based on MODBUS-RTU protocol realizations microprocessor and touch screen communication method, its
It is characterised by：The microprocessor by the Data Format Transform for receiving be a frame data by address field, function code, data segment and
The data form that check code is constituted.
4. according to claim 1 or 3 based on MODBUS-RTU protocol realizations microprocessor and touch screen communication method,
It is characterized in that：Step S2 also comprises the steps：
S21：Initialization；
S22：Detect whether that serial ports interrupts, if removing to interrupt without if flag bit is received, data is activation is terminated if having；
S23：The data that process is received, judge whether station number is 1, and whether data length goes beyond the scope；If station number for 1 or
Data length goes beyond the scope, and empties the data that receive and points out mistake；If station number is 1 and data length is without departing from scope, after
Continued access is received until receiving enough frame data；
S24：Whether the CRC check position that detection sends is equal to the CRC check position for calculating, if being not equal to, empties the data for receiving
And point out mistake；
S25：It is judged as reading holding register order or preset single register command；
S26：Send data；
S27：Detect whether to distribute, if not distributing, return to step S22.
5. it is according to claim 1 and 2 based on MODBUS-RTU protocol realizations microprocessor and touch screen communication method,
It is characterized in that：The analogue signal for detecting is converted to digital signal and is stored by the sensing system by AD conversion system
In microprocessor.
6. it is according to claim 1 based on MODBUS-RTU protocol realizations microprocessor and touch screen communication method, its
It is characterised by：The microprocessor is STM32F103 microprocessors.
7. it is according to claim 3 based on MODBUS-RTU protocol realizations microprocessor and touch screen communication method, its
It is characterised by：The address field is 1 byte, and function code is 1 byte, and data segment is 0-252 byte, and check code is 1
Byte.
8. it is according to claim 7 based on MODBUS-RTU protocol realizations microprocessor and touch screen communication method, its
It is characterised by：The transmission time of at least 3.5 bytes is spaced between every frame data；Between described each byte interior per frame data
Transmission time of the interval less than 1.5 bytes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108628536A (en) * | 2018-05-28 | 2018-10-09 | 湖北工业大学 | A kind of STM32 and serial ports touch screen communication module of man-machine interface interaction |
| CN110677398A (en) * | 2019-09-20 | 2020-01-10 | 成都艾克赛特信息科技有限公司 | AC and GC integrated communication protocol, communication system and method for full liquid crystal instrument |
| CN112822083A (en) * | 2021-01-25 | 2021-05-18 | 华电通用轻型燃机设备有限公司 | MODBUS application layer-oriented data verification method and system |
| CN114603547A (en) * | 2020-12-07 | 2022-06-10 | 山东新松工业软件研究院股份有限公司 | Communication method of cleaning robot controller and teaching box |
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