80C196系列单片机的串行口通信程序，把串行口的发送段和接收端相连，可以接收回自己发送的数据，进行校验而检测和调试单片机的串口通信。-80C196 series MCU serial port communication program, the serial port and send the receiver connected, you can receive data sent back to my own to carry out checking and testing and debugging of single-chip serial communication.