px4-firmware/src/drivers/drv_led.h

/****************************************************************************
 *
 *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * 1. Redistributions of source code must retain the above copyright
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 * 2. Redistributions in binary form must reproduce the above copyright
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 * 3. Neither the name PX4 nor the names of its contributors may be
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 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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/**
 * @file drv_led.h
 *
 * LED driver API
 */

#pragma once

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

#define LED_DEVICE_PATH		"/dev/led"

#define _LED_BASE		0x2800

/* PX4 LED colour codes */
#define LED_AMBER		1
#define LED_RED			1	/* some boards have red rather than amber */
#define LED_BLUE		0
#define LED_SAFETY		2

#define LED_ON			_IOC(_LED_BASE, 0)
#define LED_OFF			_IOC(_LED_BASE, 1)
#define LED_TOGGLE		_IOC(_LED_BASE, 2)

__BEGIN_DECLS

/*
 * Initialise the LED driver.
 */
__EXPORT void drv_led_start(void);

__END_DECLS