发送和接收到的数据一样多，边接边返回到上位机，使用串口UART0接收上位机发送的数据，接收到和发送的数据一样多后，取反LED1控制，并将数据原封不动地发送回上位机。 周立功lpc2104开发板开发-to send and receive data as much side to side to take MCS96/98 use Serial UART0 receiving PC to send data, receive and send data as much, Opposite LE