| 1. | In this protocol , the transmitter organizes the frame according to it , and the receiptor does validity check of the characters , length check , crc check . thus , the system will work more exactly and efficiently . and based on rs - 485 communication , the paper implements a process communication method , which is impulsed by overtime message of timers ’ check 在这种协议中,发送方根据协议组帧,接收方主要采用了字符合法性校验、长度校验、内容的crc校验,提高了通信的效率及正确性,最后在rs - 485通信上实现了基于定时器超时检测消息驱动的进程通信策略。 |