The work principle of COM port communication for RS-485 on the Microchip and Personal computer is simply discussed, and the sketch map and program to carry out the communication for the Microchip and Personal computer are presented.

• 对单片机与微机RS-485的串口通信工作原理做了简要的论述；给出了单片机与微机实现通信的框图及程序设计方法.