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Multi-serial-port communication method and system

A communication method and multi-serial port technology, applied in the field of embedded drivers, can solve problems such as not supporting AddrBit

Pending Publication Date: 2020-02-04
GENEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many CPUs now have their own NS16550 serial ports that do not support Addr Bit, and if they want to communicate with MCUs that must use address bits, they are helpless.

Method used

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  • Multi-serial-port communication method and system

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Embodiment Construction

[0043] The present invention provides a serial port communication method and system. In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044]Those skilled in the art will understand that the singular forms "a", "an", "said" and "the" used herein may also include plural forms unless otherwise stated. It should be further understood that the word "comprising" used in the description of the present invention refers to the stated features, integers, steps, operations, elements and / or components. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to th...

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Abstract

The invention discloses a multi-serial-port communication method and system, and the method comprises the steps: writing a to-be-transmitted data frame into a register in a central processing unit when a plurality of slave devices are accessed; enabling the central processing unit to control the register to receive the to-be-sent data frame and replace odd-even check bit characters in the to-be-sent data frame with address bit characters to obtain a replaced output data frame; and sending the output data frame to a plurality of slave devices. According to the invention, the odd-even check bitcharacter in the sent data frame is replaced by the address bit character through the register of the central processing unit; a serial port obtains address bit information of a sent data frame, serial port protocol communication supporting a multi-path mode between a master device and slave devices is achieved, and then communication connection between the master device and the multiple slave devices is achieved.

Description

technical field [0001] The invention relates to the field of embedded drive technology, in particular to a multi-serial port communication method and system. Background technique [0002] Serial ports are widely used in slow communication protocols, and are generally used in applications that require a small amount of data to be transmitted and a low rate. Such as figure 1 as shown, figure 1 It is the schematic diagram of the serial port protocol, first start START (does not occupy the frame content), data bits (5 to 8 bits), followed by the optional parity bit, and finally the stop bit. Among them, the parity check can be set as: odd check, even check, no check; the stop bit can be set as: 1bit, 1.5bit, 2bit. The serial port protocol has several important parameters, including baud rate, stop bit, data bit, and parity bit. The devices at both ends of the serial communication must be configured with exactly the same above parameters to communicate correctly. Such as fi...

Claims

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Application Information

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IPC IPC(8): G06F13/42G06F11/10
CPCG06F13/4282G06F11/10
Inventor 秦金昆吴闽华孟庆晓陈泽江
Owner GENEW TECH
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