利用串口2进行77位GPS数据的模拟发送，可以实现GPS接受的仿真，而不需要GPS接收器，是我一直使用的调试工具，可以在自己的电脑商用串口2发送，串口1接受，很方便吧，直接用自己的电脑就可以进行串口接受程序的调试了。-use for 77 simulated GPS data sent, can accept GPS Simulation, without GPS receiver, I always use the debugging tool, in their own computer business Send Serial 2, Serial accept a very convenient and direct use of their own computer can hold Serial accept a debugging procedure.