串口通信编程学习，包括pc机与pc机，pc机与单片机，pc机与读卡器等的通信-Serial communication programming learning, including PC to PC, PC and SCM, communication PC machine and card reader.

基于VC++6.0开发的串口上位机，可以方便的通过USB口利用RS232与外围硬件（如单片机）通信-PC serial port

实现了上位机与51单片机的232串口通信，可以显示实时数据曲线，设置报警上下限。-Realization of PC and 51 microcontroller 232 serial communication, you can display real-time data curve, set alarm limits.