用C++写的RS232串口异步通讯功能模块，支持16550 UART芯片，中断收发数据，波特率最大115200bps，自定义收发数据缓冲大小，支持软硬件流控。-C wrote asynchronous RS232 serial communication module, 16550 UART chip, Transceivers interruption data, 115,200 bps maximum baud rate, since the definition of sending an