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/**
 * @file drv_airspeed.h
 *
 * Airspeed driver interface.
 * 
 * @author Simon Wilks
 */

#ifndef _DRV_AIRSPEED_H
#define _DRV_AIRSPEED_H

#include <stdint.h>
#include <sys/ioctl.h>

#include "drv_sensor.h"
#include "drv_orb_dev.h"

#define AIRSPEED_DEVICE_PATH	"/dev/airspeed"

/*
 * ioctl() definitions
 *
 * Airspeed drivers also implement the generic sensor driver
 * interfaces from drv_sensor.h
 */

#define _AIRSPEEDIOCBASE		(0x7700)
#define __AIRSPEEDIOC(_n)		(_IOC(_AIRSPEEDIOCBASE, _n))

#define AIRSPEEDIOCSSCALE		__AIRSPEEDIOC(0)
#define AIRSPEEDIOCGSCALE		__AIRSPEEDIOC(1)


/** airspeed scaling factors; out = (in * Vscale) + offset */
struct airspeed_scale {
	float	offset_pa;
	float	scale;
};

#endif /* _DRV_AIRSPEED_H */