ardupilot/libraries/Desktop/support/desktop.h

#ifndef _DESKTOP_H
#define _DESKTOP_H

struct desktop_info {
	bool slider; // slider switch state, True means CLI mode
	struct timeval sketch_start_time;
	bool quadcopter; // use quadcopter outputs
};

extern struct desktop_info desktop_state;

void desktop_serial_select_setup(fd_set *fds, int *fd_high);
void sitl_input(void);
void sitl_setup(void);
int sitl_gps_pipe(void);
ssize_t sitl_gps_read(int fd, void *buf, size_t count);
void sitl_update_compass(float heading, float roll, float pitch, float yaw);
void sitl_update_gps(float latitude, float longitude, float altitude,
		     float speedN, float speedE);
void sitl_update_adc(float roll, float pitch, float yaw, float airspeed);
void sitl_setup_adc(void);
void sitl_update_barometer(float altitude);

#endif