RVDS4.0 LPC2214串口示例程序，编译环境RVDS4.0，LPC2214通过串口发送"hello word"，接下来将接收到的数据然后返回-RVDS4.0 LPC2214 serial example program, compile environmental RVDS4.0, LPC2214 through the serial port to send " hello word" , then the received data and return