CN113794538A - High-efficiency dual-computer communication feedback method - Google Patents
High-efficiency dual-computer communication feedback method Download PDFInfo
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- CN113794538A CN113794538A CN202110993405.XA CN202110993405A CN113794538A CN 113794538 A CN113794538 A CN 113794538A CN 202110993405 A CN202110993405 A CN 202110993405A CN 113794538 A CN113794538 A CN 113794538A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Communication Control (AREA)
Abstract
A high-efficiency dual-computer communication feedback method is disclosed, a data sending end and a data receiving end which are connected through a serial port are arranged, a data packet is provided with a synchronous head, a data section and a check code, the data sending end is provided with a feedback waiting chain table, the data receiving end is provided with a data sending chain table, the synchronous head is provided with two feedback bits, and the dual-computer communication feedback method is provided with the following steps: a data sending end sends a data packet of a software task, enters a feedback waiting linked list and starts a timer; the data receiving end receives the data packet, carries out data verification on the data packet, and sets a feedback bit of a synchronization head of a first data packet of a data transmission linked list according to a verification result; the data receiving end is connected with a first data packet of a data transmission linked list; the data sending end receives the data packet, deletes or restarts the first software task of the feedback waiting linked list according to the value of the feedback bit, and stops the timing work of the timer; and when the timing time of the timer is up, the data sending end restarts the first software task of the feedback waiting linked list.
Description
Technical Field
The patent relates to a high-efficiency dual-computer communication feedback method, belonging to the technical field of computer communication.
Background
In a multi-machine system, information is exchanged between processors through a serial port, and a communication protocol including a format of a data packet and a feedback mechanism is designed for ensuring communication stability. The feedback mechanism is that after the data receiver receives the data packet, the data receiver sends a confirmation message to the data sender, which indicates that the received data is verified correctly or that the received data is verified incorrectly, and the data sender needs to resend the data packet. The feedback mechanism ensures that a data receiver receives correct data, but the feedback mechanism does not send application data, and pressure is caused to data communication under the conditions of frequent data receiving and sending and limited communication bandwidth.
Disclosure of Invention
The present invention aims to solve the above problems, and provides a high-efficiency dual-computer communication feedback method, which completes a feedback mechanism on the premise of not occupying communication bandwidth, and realizes reliable and high-efficiency data communication.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-efficiency dual-computer communication feedback method is provided, which comprises a data sending end and a data receiving end, wherein the data sending end and the data receiving end are connected through a serial port and can send and receive data packets with specified formats, the data packets are provided with a synchronous head, a data section and a check code, the data sending end is provided with a feedback waiting linked list, the feedback waiting linked list is set as a first-in first-out rule, the data receiving end is provided with a data sending linked list, the data sending linked list is set as a first-in first-out rule, the synchronous head is provided with two feedback bits, a binary system 00 is in a default state and indicates no feedback, a binary system 01 indicates correct data receiving, a binary system 10 indicates wrong data receiving, a binary system 11 is in a reserved state, and the dual-computer communication feedback method comprises the following steps:
(1) when the data sending end sends a data packet of the software task, adding the software task into the feedback waiting linked list, and starting a timer, wherein the timing time is the longest feedback waiting time of the software task;
(2) after the data receiving end receives the data packet, firstly checking the data transmission linked list, and if the data transmission linked list is empty, generating a data packet with an empty data segment; then, carrying out data verification on the received data packets, if the data packets are verified to be qualified, setting the feedback bit of the synchronization head of the first data packet of the data transmission linked list to be binary 01, and if the data packets are verified to be unqualified, setting the feedback bit of the synchronization head of the first data packet of the data transmission linked list to be binary 10;
(3) the data receiving end receives and sends a first data packet of the data sending linked list;
(4) after the data sending end receives the data packet, if the feedback bit is binary 01, deleting the first software task of the feedback waiting linked list, and stopping the timing work of the timer; if the feedback bit is binary 10, restarting the first software task of the feedback waiting linked list to transmit data, and stopping the timing work of the timer;
(5) and when the timing time of the timer is up, the data sending end restarts the first software task of the feedback waiting linked list and returns to the step (1).
When the data receiving end needs to send data, the data receiving end is set as a data sending end, and the data sending end is set as a data receiving end.
The invention has the following beneficial effects: in a multi-machine system, a feedback mechanism is completed on the premise of not occupying communication bandwidth, and reliable and efficient data communication is realized.
Drawings
Fig. 1 is a flow chart provided by the practice of this patent.
Detailed Description
For a better understanding of this patent, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Referring to fig. 1, in a multi-machine system, in order to improve data communication efficiency, a high-efficiency dual-machine communication feedback method is provided. The data transmitting terminal and the data receiving terminal are connected through a serial port and can transmit and receive data packets with specified formats, and the serial port can be set as a full-duplex serial port or a half-duplex serial port, so that implementation of patents is not influenced. The data packet is provided with a synchronous head, a data segment and a check code, the data segment is information to be sent, the check code is used for judging whether the data packet has errors, the synchronous head is used for explaining the initial position of the data packet, a two-bit feedback bit is set, a binary system 00 is in a default state and indicates no feedback, a binary system 01 indicates that data is received correctly, a binary system 10 indicates that the data is received incorrectly, and a binary system 11 is in a reserved state. When the feedback information does not need to be sent, the feedback bit is set to be binary 00; when the feedback information needs to be sent, the feedback bit is set to binary 01 or binary 10.
The data sending end is provided with a feedback waiting linked list which is set as a first-in first-out rule and used for storing software tasks for finishing a data sending process and waiting for feedback information of the data receiving end; the data receiving end is provided with a data transmission linked list which is set as a first-in first-out rule and used for storing a data packet to be transmitted.
The double-machine communication feedback method comprises the following steps:
(1) when the data sending end sends a data packet of the software task, adding the software task into the feedback waiting linked list, and starting a timer, wherein the timing time is the longest feedback waiting time of the software task;
and after the software task finishes sending the data packet, entering the feedback waiting linked list to wait for feedback information.
(2) After the data receiving end receives the data packet, firstly checking the data transmission linked list, and if the data transmission linked list is empty, generating a data packet with an empty data segment; then, carrying out data verification on the received data packets, if the data packets are verified to be qualified, setting the feedback bit of the synchronization head of the first data packet of the data transmission linked list to be binary 01, and if the data packets are verified to be unqualified, setting the feedback bit of the synchronization head of the first data packet of the data transmission linked list to be binary 10;
after the data receiving end receives the data packet, the first step is to ensure that the data transmission linked list at least has one data packet to be transmitted, if not, one data packet with empty data segment is added, so that feedback information can be added on the synchronization head. And secondly, carrying out data verification on the data packet, and setting binary information for the feedback bit according to a verification result.
(3) The data receiving end receives and sends a first data packet of the data sending linked list;
and the data receiving end sends a data packet with feedback information.
(4) After the data sending end receives the data packet, if the feedback bit is binary 01, deleting the first software task of the feedback waiting linked list, and stopping the timing work of the timer; if the feedback bit is binary 10, restarting the first software task of the feedback waiting linked list to transmit data, and stopping the timing work of the timer;
after the data sending end receives the data packet, firstly, the data sending end analyzes the synchronous head of the data packet, including judging whether the synchronous head conforms to a communication protocol or not, and analyzing the numerical value of the feedback bit to determine whether the software task waiting for feedback successfully ends a data sending task or restarts the data sending.
(5) And when the timing time of the timer is up, the data sending end restarts the first software task of the feedback waiting linked list and returns to the step (1).
And (5) aiming at the processing method of the first software task of the feedback waiting linked list under the condition of waiting timeout.
The data sending end and the data receiving end are relative to data sending and receiving, when the data receiving end needs to send data, the functions of the data sending end and the data receiving end are exchanged, the data receiving end is set as the data sending end, and the data sending end is set as the data receiving end. For a full-duplex serial port, data can be sent and received simultaneously, so that a processor in a multi-machine system can be the data sending end and the data receiving end.
In summary, in order to solve the problems of frequent data transceiving and limited communication bandwidth in a multi-machine system, a high-efficiency dual-machine communication feedback method is provided, in which a feedback bit is added in the existing communication protocol, and a feedback mechanism is completed on the premise of not occupying the communication bandwidth, thereby realizing reliable and high-efficiency data communication.
Claims (2)
1. A high-efficiency dual-computer communication feedback method is provided, a data sending end and a data receiving end are arranged, the data sending end and the data receiving end are connected through a serial port and can send and receive data packets with specified formats, the data packets are provided with synchronous heads, data sections and check codes, and the method is characterized in that: the data sending end is provided with a feedback waiting linked list, the feedback waiting linked list is set as a first-in first-out rule, the data receiving end is provided with a data sending linked list, the data sending linked list is set as a first-in first-out rule, the synchronization head is provided with two feedback bits, binary 00 is in a default state and indicates no feedback, binary 01 indicates that data is correctly received, binary 10 indicates that data is incorrectly received, binary 11 is in a reserved state, and the dual-computer communication feedback method comprises the following steps:
(1) when the data sending end sends a data packet of the software task, adding the software task into the feedback waiting linked list, and starting a timer, wherein the timing time is the longest feedback waiting time of the software task;
(2) after the data receiving end receives the data packet, firstly checking the data transmission linked list, and if the data transmission linked list is empty, generating a data packet with an empty data segment; then, carrying out data verification on the received data packets, if the data packets are verified to be qualified, setting the feedback bit of the synchronization head of the first data packet of the data transmission linked list to be binary 01, and if the data packets are verified to be unqualified, setting the feedback bit of the synchronization head of the first data packet of the data transmission linked list to be binary 10;
(3) the data receiving end receives and sends a first data packet of the data sending linked list;
(4) after the data sending end receives the data packet, if the feedback bit is binary 01, deleting the first software task of the feedback waiting linked list, and stopping the timing work of the timer; if the feedback bit is binary 10, restarting the first software task of the feedback waiting linked list to transmit data, and stopping the timing work of the timer;
(5) and when the timing time of the timer is up, the data sending end restarts the first software task of the feedback waiting linked list and returns to the step (1).
2. The method as claimed in claim 1, wherein the method further comprises: when the data receiving end needs to send data, the data receiving end is set as a data sending end, and the data sending end is set as a data receiving end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110993405.XA CN113794538A (en) | 2021-08-27 | 2021-08-27 | High-efficiency dual-computer communication feedback method |
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| CN202110993405.XA CN113794538A (en) | 2021-08-27 | 2021-08-27 | High-efficiency dual-computer communication feedback method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114760010A (en) * | 2022-04-02 | 2022-07-15 | 沈阳飞机设计研究所扬州协同创新研究院有限公司 | Reliable serial port data transmission method |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114760010A (en) * | 2022-04-02 | 2022-07-15 | 沈阳飞机设计研究所扬州协同创新研究院有限公司 | Reliable serial port data transmission method |
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Application publication date: 20211214 |