CN105183687A - Time-sharing serial communication method and system - Google Patents
Time-sharing serial communication method and system Download PDFInfo
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- CN105183687A CN105183687A CN201510466093.1A CN201510466093A CN105183687A CN 105183687 A CN105183687 A CN 105183687A CN 201510466093 A CN201510466093 A CN 201510466093A CN 105183687 A CN105183687 A CN 105183687A
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- 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
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Abstract
The present invention provides a time-sharing serial communication method and system, and relates to the technical field of communications. The method comprises: establishing an electrical connection between a master and a slave; obtaining configuration parameters of a communication serial port of the master, and performing parameter configuration to a communication serial port of the slave according to the configuration parameters; sending first data to the slave by the master, and after the first data is received by the slave, delaying a first preset time and returning a response to the master; and if the response returned from the slave is received by the master within a second preset time, sending second data to the slave after the first preset time is delayed, wherein the second preset time is greater than the first preset time. According to the time-sharing serial communication method and system, serial communication is not affected by the number of transmitted bytes, so as to avoid the problem in the prior art of communication conflict between sending-receiving and resending that easily occurs when the number of the transmitted bytes is large, thereby greatly reducing communication error rate.
Description
Technical field
The invention belongs to communication technical field, particularly relate to a kind of timesharing serial port communication method.
Background technology
Serial communication is single-chip microcomputer and DSP (DigitalSignalProcessor, digital signal processor) etc. between embedded system, and a kind of extremely important between embedded system and PC or wireless module and the communication mode generally used.At present, the product adopting serial port communication technology is all generally conventional communication mode, first carries out parameter configuration by main frame to the communication serial port from machine, makes to match from the configuration parameter of machine and main-machine communication serial ports; Then adopt the mode of question-response to carry out serial communication at main frame and between machine, if main frame sends after data to from machine, do not receive the response of replying from machine, then think communication therefore normal, now main frame can send data to from machine again.There is following defect in this communication mode: the impact being subject to transmitting byte number due to communication mode is larger, when transmitting byte number and being larger, may be very slow to providing response from receiving data from machine, main frame may be thought from machine and occurs communication abnormality in the process, again data are sent to from machine, if so now when sending response to main frame again from machine, will cause communication contention aware, the bit error rate is higher.This defect seems particularly outstanding in half full work communication of serial communication.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of timesharing serial port communication method and system, is intended to solve above-mentioned serial communication mode and easily occurs communication contention aware and the higher problem of the bit error rate.
The embodiment of the present invention is achieved in that a kind of timesharing serial port communication method, comprising:
Electrical connection is set up by main frame with from machine;
Obtain the configuration parameter of main-machine communication serial ports, and according to described configuration parameter, parameter configuration is carried out to the described communication serial port from machine;
Described main frame sends the first data to described from machine, described receive described first data from machine after time delay first Preset Time return response to described main frame;
If described main frame receives the described response returned from machine in the second Preset Time, then send the second data to described from machine after time delay first Preset Time, described second Preset Time is greater than described first Preset Time.
In the timesharing serial port communication method described in the embodiment of the present invention, send first data to described from machine at described main frame, describedly receive time delay Preset Time after described first data from machine and also comprise after described main frame returns response:
If described main frame does not receive response in described second Preset Time, then again send the first data to described from machine, until receive the described response message returned according to described first data from machine, then send second data to described from machine according to described response message; Otherwise, if through repeatedly the second Preset Time, after described main frame exceedes preset times to the described number of times sending the first data from machine, described main frame does not receive the described response returned from machine yet, then be judged as communication abnormality, and send the warning information of communication abnormality to user.
In the timesharing serial port communication method described in the embodiment of the present invention, described configuration parameter comprises baud rate, data bit, position of rest and parity check bit.
In the timesharing serial port communication method described in the embodiment of the present invention, described first Preset Time is 100ms, and described second Preset Time is 1s.
In the timesharing serial port communication method described in the embodiment of the present invention, described preset times is more than or equal to 5 times.
Another object of the embodiment of the present invention is to provide a kind of timesharing serial communication system, comprising: connecting line, main frame and from machine, and described main frame comprises parameter configuration module and first processor, describedly comprises the second processor from machine;
Described connecting line, for setting up electrical connection by main frame with from machine;
Described parameter configuration module, for obtaining the configuration parameter of main-machine communication serial ports, and carries out parameter configuration according to described configuration parameter to the described communication serial port from machine;
Described first processor, sends first data to described from machine for controlling described main frame;
Described second processor, for make described receive described first data from machine after time delay first Preset Time return response to described main frame;
Described first processor, if also receive the described response returned from machine for described main frame in the second Preset Time, then send the second data to described from machine after time delay first Preset Time, described second Preset Time is greater than described first Preset Time.
In the timesharing serial communication system described in the embodiment of the present invention, described first processor also for:
If described main frame does not receive response in described second Preset Time, then again send the first data to described from machine, until receive the described response message returned according to described first data from machine, then send second data to described from machine according to described response message; Otherwise, if through repeatedly the second Preset Time, after described main frame exceedes preset times to the described number of times sending the first data from machine, described main frame does not receive the described response returned from machine yet, then be judged as communication abnormality, and send the warning information of communication abnormality to user.
In the timesharing serial communication system described in the embodiment of the present invention, described configuration parameter comprises baud rate, data bit, position of rest and parity check bit.
In the timesharing serial communication system described in the embodiment of the present invention, described first Preset Time is 100ms, and described second Preset Time is 1s.
In the timesharing serial communication system described in the embodiment of the present invention, described preset times is more than or equal to 5 times.
A kind of timesharing serial port communication method that the enforcement embodiment of the present invention provides and system have following beneficial effect:
First the embodiment of the present invention owing to setting up electrical connection by main frame with from machine; Then obtain the configuration parameter of main-machine communication serial ports, and according to described configuration parameter, parameter configuration is carried out to the described communication serial port from machine; Finally adopt described main frame to send the first data to described from machine, described receive described first data from machine after time delay first Preset Time return response to described main frame; If described main frame receives the described response returned from machine in the second Preset Time, then send the second data to described from machine after time delay first Preset Time, and carry out the communication that goes round and begins again in this way, thus make serial communication not by the impact of transmission byte number, avoid exist in prior art when transmit byte number larger time, easily there is the problem of communication contention aware between receiving and dispatching and retransmitting, greatly reduce communication bit error rates.
Accompanying drawing explanation
Fig. 1 is the specific implementation process flow diagram of the timesharing serial port communication method that first embodiment of the invention provides;
Fig. 2 is the specific implementation process flow diagram of the timesharing serial port communication method that second embodiment of the invention provides;
Fig. 3 is the communication scheme of the timesharing serial port communication method that second embodiment of the invention provides;
Fig. 4 is the structured flowchart of the timesharing serial communication system that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows the specific implementation process flow diagram of the timesharing serial port communication method that first embodiment of the invention provides.Shown in Figure 1, a kind of timesharing serial port communication method that the present embodiment provides, comprising:
In S101, set up electrical connection by main frame with from machine.
In the present embodiment, signal wire is adopted to couple together by the communication serial port of main frame with from the communication serial port of machine, to make main frame and set up electrical connection between machine.
In S102, obtain the configuration parameter of main-machine communication serial ports, and according to described configuration parameter, parameter configuration is carried out to the described communication serial port from machine.
In the present embodiment, configuration parameter specifically comprises: described configuration parameter comprises baud rate, data bit, position of rest and parity check bit.When main frame with after setting up electrical connection from machine, by the configuration parameter of main frame automatic acquisition self communication serial ports, and described configuration parameter is issued to from machine, described configuration parameter is utilized to carry out parameter configuration to the communication serial port of self by the CPU from machine, to make mutually to mate from the baud rate of machine communication serial port and main-machine communication serial ports, data bit, position of rest and parity check bit, like this between machine and main frame could carry out normal serial communication.
In S103, described main frame sends the first data to described from machine, described receive described first data from machine after time delay first Preset Time return response to described main frame.
In the present embodiment, described first Preset Time is 100ms, described receive described first data from machine after can process described first data, and time delay 100ms returns the response message receiving described first data to main frame after processing is completed, due to from machine serial communication be step-by-step grouping transmit, therefore from the time of machine process data be very of short duration, negligible relative to 100ms.
In S104, if described main frame receives the described response returned from machine in the second Preset Time, then send the second data to described from machine after time delay first Preset Time, described second Preset Time is greater than described first Preset Time.
In the present embodiment, if main frame is after Xiang Congji sends the first data, the response message returned from machine is received in the second Preset Time, first data transmission success is then described, now, main frame can continue to sending next data (i.e. the second data) from machine, and communicating at main frame with between machine of adopting this kind of communication mode to go round and begin again.
More than can find out, the timesharing serial port communication method that the present embodiment provides is owing to adopting timesharing delay disposal at main frame with from when communicating between machine, thus serial communication can be made not by the impact of transmission byte number, avoid exist in prior art when transmit byte number larger time, easily there is the problem of communication contention aware between receiving and dispatching and retransmitting, greatly reduce communication bit error rates.
Fig. 2 shows the specific implementation process flow diagram of the timesharing serial port communication method that second embodiment of the invention provides.Shown in Figure 2, the timesharing serial port communication method that the present embodiment provides comprises:
In S201, set up electrical connection by main frame with from machine;
In S202, obtain the configuration parameter of main-machine communication serial ports, and according to described configuration parameter, parameter configuration is carried out to the described communication serial port from machine;
In S203, described main frame sends the first data to described from machine, described receive described first data from machine after time delay first Preset Time return response to described main frame;
In S204, if described main frame does not receive response in described second Preset Time, then again send the first data to described from machine, until receive the described response message returned according to described first data from machine, then send second data to described from machine according to described response message; Otherwise, if through repeatedly the second Preset Time, after described main frame exceedes preset times to the described number of times sending the first data from machine, described main frame does not receive the described response returned from machine yet, then be judged as communication abnormality, and send the warning information of communication abnormality to user.
In the present embodiment, the second Preset Time is 1s, and described preset times is more than or equal to 5 times.With a specific implementation example, step S204 is described in detail below: in a specific implementation example, we suppose main frame and are 12 bytes from the first data transmitted between machine, baud rate is 1200b/s, so main frame sends the first data to impacting and receiving the response message returned from machine, during this period of time must in 1s.Therefore, if main frame does not receive the data returned from machine after transmission data 1s, then communication failure is described, now main frame is attempted resending the first data to from machine again, if receive the response message returned from machine in the 1s after transmission first data, then illustrate that communication recovery is normal, continues to send the second data to from machine; Otherwise, if sending the first data through repeatedly 1s aft engine to from machine, main frame does not all receive the response message returned from machine, then be judged as communication abnormality, now main frame can send the warning information of communication abnormality from trend user, so that user can take corresponding remedial measures in time according to warning information.Should be understood that, step S201 in the present embodiment ~ S203 is identical with the step S101 ~ S103 in a upper embodiment, for avoiding tired stating, here no longer describe in detail, and the communication scheme of tdm communication method that the present embodiment provides specifically can be shown in Figure 3, wherein Tx represents the transmitting terminal of communication serial port.
More than can find out, the timesharing serial port communication method that second embodiment of the invention provides can make serial communication equally not by the impact of transmission byte number, avoid exist in prior art when transmit byte number larger time, easily there is the problem of communication contention aware between receiving and dispatching and retransmitting, greatly reduce communication bit error rates; In addition, the present embodiment at main frame with when occurring abnormal from the communication between machine, can also send warning information to user, enables to adopt remedial measures in user's very first time, further improve the reliability of serial communication in time relative to the first embodiment.
Fig. 4 is the structured flowchart of the timesharing serial communication system that the embodiment of the present invention provides, and this system is the executive agent of the method described in Fig. 1 ~ Fig. 2 embodiment.Illustrate only the part relevant to the embodiment of the present invention for convenience of explanation.
Shown in Figure 4, a kind of timesharing serial communication system that the embodiment of the present invention provides, comprising: connecting line 1, main frame 2 and from machine 3, and described main frame 2 comprises parameter configuration module 21 and first processor 22, describedly comprises the second processor 31 from machine 3;
Described connecting line 1, for setting up electrical connection by main frame 2 with from machine 3;
Described parameter configuration module 21, for obtaining the configuration parameter of main frame 2 communication serial port, and carries out parameter configuration according to described configuration parameter to the described communication serial port from machine 3;
Described first processor 22, sends first data to described from machine 3 for controlling described main frame 2;
Described second processor 31, for make described receive described first data from machine 3 after time delay first Preset Time return response to described main frame 2;
Described first processor 22, if also receive the described response returned from machine 3 for described main frame 2 in the second Preset Time, then send the second data to described from machine 3 after time delay first Preset Time, described second Preset Time is greater than described first Preset Time.
Optionally, described first processor 22 also for:
If described main frame 2 does not receive response in described second Preset Time, then again send the first data to described from machine 3, until receive the described response message returned according to described first data from machine 3, then send second data to described from machine 3 according to described response message; Otherwise, if through repeatedly the second Preset Time, after described main frame 2 exceedes preset times to the described number of times sending the first data from machine 3, described main frame 2 does not receive the described response returned from machine 3 yet, then be judged as communication abnormality, and send the warning information of communication abnormality to user.
Optionally, described configuration parameter comprises baud rate, data bit, position of rest and parity check bit.
Optionally, described first Preset Time is 100ms, and described second Preset Time is 1s.
Optionally, described preset times is more than or equal to 5 times.
It should be noted that, shown in Fig. 4 is the system adopting full-duplex communication mode, and the tdm communication mode that the embodiment of the present invention provides is equally applicable to the system of half full work communication; In addition, each step in said system provided by the invention, due to the inventive method embodiment based on same design, its technique effect brought is identical with present system embodiment, particular content see describing in the inventive method embodiment, can repeat no more herein.
Therefore, the timesharing serial communication system that the embodiment of the present invention provides, can avoid equally existing in prior art when transmitting byte number and being larger, easily there is the problem of communication contention aware between receiving and dispatching and retransmitting, greatly reduce communication bit error rates; In addition, at main frame with when occurring abnormal from the communication between machine, warning information can also be sent to user in time, enables to adopt remedial measures in user's very first time, further improve the reliability of serial communication.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a timesharing serial port communication method, is characterized in that, comprising:
Electrical connection is set up by main frame with from machine;
Obtain the configuration parameter of main-machine communication serial ports, and according to described configuration parameter, parameter configuration is carried out to the described communication serial port from machine;
Described main frame sends the first data to described from machine, described receive described first data from machine after time delay first Preset Time return response to described main frame;
If described main frame receives the described response returned from machine in the second Preset Time, then send the second data to described from machine after time delay first Preset Time, described second Preset Time is greater than described first Preset Time.
2. timesharing serial port communication method as claimed in claim 1, is characterized in that, send the first data at described main frame to described from machine, describedly receives time delay Preset Time after described first data from machine and also comprises after described main frame returns response:
If described main frame does not receive response in described second Preset Time, then again send the first data to described from machine, until receive the described response message returned according to described first data from machine, then send second data to described from machine according to described response message; Otherwise, if through repeatedly the second Preset Time, after described main frame exceedes preset times to the described number of times sending the first data from machine, described main frame does not receive the described response returned from machine yet, then be judged as communication abnormality, and send the warning information of communication abnormality to user.
3. timesharing serial port communication method as claimed in claim 1, it is characterized in that, described configuration parameter comprises baud rate, data bit, position of rest and parity check bit.
4. timesharing serial port communication method as claimed in claim 1, it is characterized in that, described first Preset Time is 100ms, and described second Preset Time is 1s.
5. timesharing serial port communication method as claimed in claim 2, it is characterized in that, described preset times is more than or equal to 5 times.
6. a timesharing serial communication system, is characterized in that, comprising: connecting line, main frame and from machine, and described main frame comprises parameter configuration module and first processor, describedly comprises the second processor from machine;
Described connecting line, for setting up electrical connection by main frame with from machine;
Described parameter configuration module, for obtaining the configuration parameter of main-machine communication serial ports, and carries out parameter configuration according to described configuration parameter to the described communication serial port from machine;
Described first processor, sends first data to described from machine for controlling described main frame;
Described second processor, for make described receive described first data from machine after time delay first Preset Time return response to described main frame;
Described first processor, if also receive the described response returned from machine for described main frame in the second Preset Time, then send the second data to described from machine after time delay first Preset Time, described second Preset Time is greater than described first Preset Time.
7. timesharing serial communication system as claimed in claim 6, is characterized in that, described first processor also for:
If described main frame does not receive response in described second Preset Time, then again send the first data to described from machine, until receive the described response message returned according to described first data from machine, then send second data to described from machine according to described response message; Otherwise, if through repeatedly the second Preset Time, after described main frame exceedes preset times to the described number of times sending the first data from machine, described main frame does not receive the described response returned from machine yet, then be judged as communication abnormality, and send the warning information of communication abnormality to user.
8. timesharing serial communication system as claimed in claim 6, it is characterized in that, described configuration parameter comprises baud rate, data bit, position of rest and parity check bit.
9. timesharing serial communication system as claimed in claim 6, it is characterized in that, described first Preset Time is 100ms, and described second Preset Time is 1s.
10. timesharing serial communication system as claimed in claim 7, it is characterized in that, described preset times is more than or equal to 5 times.
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| CN107094316A (en) * | 2017-03-30 | 2017-08-25 | 努比亚技术有限公司 | Mobile terminal and its data transmission method |
| CN108826588A (en) * | 2018-05-11 | 2018-11-16 | 珠海格力电器股份有限公司 | The air-conditioner set means of communication and device |
| CN109905197A (en) * | 2019-01-31 | 2019-06-18 | 江苏金智科技股份有限公司 | A kind of wireless anti-interference method and fault detector retransmitted based on random number |
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| CN117349201A (en) * | 2023-10-13 | 2024-01-05 | 芜湖藦卡机器人科技有限公司 | Multi-slave control method, system and storage medium based on serial port communication |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107092574A (en) * | 2017-03-23 | 2017-08-25 | 北京遥测技术研究所 | A kind of Multi-serial port suitable for electronic equipment on satellite caches multiplexing method |
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| CN107094316A (en) * | 2017-03-30 | 2017-08-25 | 努比亚技术有限公司 | Mobile terminal and its data transmission method |
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| CN108826588A (en) * | 2018-05-11 | 2018-11-16 | 珠海格力电器股份有限公司 | The air-conditioner set means of communication and device |
| CN108826588B (en) * | 2018-05-11 | 2020-08-18 | 珠海格力电器股份有限公司 | Air conditioning unit communication method and device |
| CN109905197A (en) * | 2019-01-31 | 2019-06-18 | 江苏金智科技股份有限公司 | A kind of wireless anti-interference method and fault detector retransmitted based on random number |
| CN111710316A (en) * | 2020-06-23 | 2020-09-25 | 歌尔科技有限公司 | Image data transmission method, image display method, chip and wearable device |
| CN117349201A (en) * | 2023-10-13 | 2024-01-05 | 芜湖藦卡机器人科技有限公司 | Multi-slave control method, system and storage medium based on serial port communication |
| CN117349201B (en) * | 2023-10-13 | 2024-03-05 | 芜湖藦卡机器人科技有限公司 | Multi-slave control method, system and storage medium based on serial port communication |
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Address after: 518000 Guangdong province Shenzhen Guangming New District Gongming street Gongming South Avenue Geya Technology Building 3 building 1-4 layer Applicant after: Shenzhen Zhenbang intelligent Polytron Technologies Inc Address before: 518000, Guangdong, Nanshan District, Taoyuan street, Longjing second industrial zone, A building, 2 floor, A building, 3 building, north, B building, 3 floor, B building, 6 floor, building C, building 3, Shenzhen Applicant before: SHENZHEN ZHENBANG INTELLIGENT TECHNOLOGY CO., LTD. |
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