一个单片机C51串口接收（中断）和发送例程，可以用来测试51单片机的中断接收 -C51 microcontroller serial port to receive a (break) and send routine can be used to interrupt the microcontroller 51 receives the test

/*说明：AVR串口是通过UDR发送出去的，类似于51单片机的SBUF*/ /*程序功能:能够通过串行数据发送给PC机0x12数据，接收上位机数据并且+1后发送回上位机*/-uart communication implement