px4-firmware/apps/gps/nmea_helper.h

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/*
* nmea_helper.h
*
* Created on: Mar 15, 2012
* Author: thomasgubler
*/
#ifndef NMEA_H_
#define NMEA_H_
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "nmealib/nmea/nmea.h"
//definitions for watchdog
#define NMEA_WATCHDOG_CRITICAL_TIME_MICROSECONDS 2000000
#define NMEA_WATCHDOG_WAIT_TIME_MICROSECONDS 800000
typedef struct {
uint64_t last_message_timestamp;
} __attribute__((__packed__)) type_gps_bin_nmea_state;
typedef type_gps_bin_nmea_state gps_bin_nmea_state_t;
extern gps_bin_nmea_state_t *nmea_state;
extern pthread_mutex_t *nmea_mutex;
int read_gps_nmea(int fd, char *gps_rx_buffer, int buffer_size, nmeaINFO *info, nmeaPARSER *parser);
void *nmea_loop(void *arg);
void *nmea_watchdog_loop(void *arg);
/**
* \brief Convert NDEG (NMEA degree) to fractional degree
*/
float ndeg2degree(float val);
void nmea_init(void);
#endif /* NMEA_H_ */