Introduction - If you have any usage issues, please Google them yourself
C51 single-chip serial port receive and transmit interrupt routine test (including the Communication Protocol), which I wrote it myself a process, feel good, and sent to U.S. reference
Packet : 3971000c51.rar filelist
单片机C51串口中断接收和发送测试例程(含通信协议的实现).txt