/* this is the state of our connection to the qemu_gpsd daemon */ typedef struct { int init; int fd; // UART5 FD #if GPS_GPIO_INCLUDE int fdGps; // GPS_GPIO FD #endif GpsCall

NMEA--- National Marine Electronics Association, GPS导航专用名词～ HAL 层代码如下：#define NMEA_MAX_SIZE 83 typedef struct { int pos; int overflow; int utc_year; int utc_mon; int utc_day;