Analysis of GPS data frame The design of the following four main data collection format: GPGGA (location information), GPRMC (Recommended Minimum location information), GPVTG (ground speed information), PGRME (forecast error message)-Analysis of GP

GPS GPRMC协议解析（包括GPS的RTC时钟，经纬度）-GPS GPRMC protocol analysis (including GPS, RTC clock, latitude and longitude)

读取gps定位信息，并解析其中的$gprmc语句，用于qt界面显示。-Read gps positioning information, and explain the $ gprmc statement to qt interface display.