RS232串口的C源代码，共分开为4个，可用来较详细的了解RS232的通信技术。-RS232 serial port of the C source code, for a total of four separate, can be used to a more detailed understanding of the RS232 communication technologies.

基于8250串口通信接口技术 中断方式接收数据-8250 based serial communication interface technology interrupt receiving data