mingtaizi / f103_485_test Goto Github PK
View Code? Open in Web Editor NEW103开发板上的485通信代码,工作流程:主机先向从机发送一帧 数据,从机接收到数据后回一帧,主机接收到回的数据后再向从机发,数据从0001开始加,每次接收到数据都会加1。实现方式:通过 dma + usart 实现,可以在串口中断里通过IDLE标志位接收不定长数据。延迟大概10ms一帧,因为485的接收转发送延时5ms,发送转接收延时5ms。
103开发板上的485通信代码,工作流程:主机先向从机发送一帧 数据,从机接收到数据后回一帧,主机接收到回的数据后再向从机发,数据从0001开始加,每次接收到数据都会加1。实现方式:通过 dma + usart 实现,可以在串口中断里通过IDLE标志位接收不定长数据。延迟大概10ms一帧,因为485的接收转发送延时5ms,发送转接收延时5ms。
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