VC串口通讯

代码说明：

  用C语言做一个串口通信的程序，使用串口1与串口2通讯，可以相互传输英文字符，波特率可以修改(Using C language to make a serial communication program, using serial port 1 to communicate with serial port 2, English characters can be transmitted to each other, and baud rate can be modified.)