使用单片机C语言编的单片机实验板与上位机的串口通信（可接收上位机命令和根据命令给上位机上传上位机需要的数据）程序，可供单片机开发人员参考。-use C language series micro-controller board and PC serial communications (PC can receive orders and orders under the PC to PC to upload the data needed) process for the developmen