万龙ARM744B0开发板异步串行通信程序，-10000 Long ARM744B0 development board asynchronous serial communication program

s3c2440通用异步触发器提供3个独立的异步串行I/O，在CPU和UART之间传输数据时UART可以产生中断或DMA请求-s3c2440 universal asynchronous trigger provides three independent asynchronous serial I/O, UART can generate an interrupt or DMA request to transfer data between the CPU and the UART