基于FPGA串口波特率自适应功能的设计与实现

Design and implementation of serial port baud rate adaptive function based on FPGA

为解决分布式串行通信系统中,传输速率需要事先约定且一旦约定就不易修改的问题,实现系统传输速率自适应调整功能,本文设计了一种基于FPGA模块,采用该设计,通信主机可以在需要时发出重置通信速率命令启动从机开始通信速率自测试与自设置功能,并在设置完成后以新的速率与主机建立通信链路。时序仿真结果表明,该设计很好的实现了上述功能。该设计可广泛应用于需要根据实际情况自动修改通信速率的分布式串行通信系统中。

In order to solve the problem that the transmission rate in distributed serial communication system needs to be agreed in advance and it is difficult to modify once the agreement is agreed,this paper designs a kind of serial communication rate automatic detection based on FPGA.With this design,the communication host can start the function of self-testing and self-setting of the communication rate by sending the reset rate command when necessary,and establish the communication link with the host at a new rate after setting up.The timing simulation results show that the design achieves the above functions well.This design can be widely used in distributed serial communication systems which need to modify the communication rate automatically according to the actual situation.