LPC1700系列串口查询接收方式程序，全速运行程序用串口调试软件发送字符串，并在接收窗口查看返回数据,波特率为115200,上位机一次需要发送20个字符。-LPC1700 series serial queries receive mode program, run at full speed the program to send string using serial debugging software, see the return data in the receive window