2个51单片机实现UART通信

程序分master和slave2个部分。

master等待按键（SW1），按键按下后将数据发送到slave单片机，slave单片机中断接受查询发送，将收到的数据发送回master，master中断接受，收到后将LED灯点亮。-two 51 MCU UART communication procedure, and the master slave2 parts. Wait for the master keys (SW1), press the button will send data to the slave microcontroller, SCM interrupted slave to inquiries sent, the data received will be sent back to the master. master termination received LED lights will be lit.