/****************************************************************************
 *
 *   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
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

 /**
  * @file px4io.h
  *
  * General defines and structures for the PX4IO module firmware.
  */

#include <nuttx/config.h>

#include <stdbool.h>
#include <stdint.h>

#include <drivers/boards/px4io/px4io_internal.h>

#include "protocol.h"

/*
 * Constants and limits.
 */
#define MAX_CONTROL_CHANNELS	12
#define IO_SERVO_COUNT		8

/*
 * Debug logging
 */

#if 1
# define debug(fmt, ...)	lib_lowprintf(fmt "\n", ##args)
#else
# define debug(fmt, ...)	do {} while(0)
#endif

/*
 * System state structure.
 */
struct sys_state_s 
{

	bool		armed;		/* actually armed */
	bool		arm_ok;		/* FMU says OK to arm */

	/*
	 * Data from the remote control input(s)
	 */
	int		rc_channels;
	uint16_t	rc_channel_data[PX4IO_INPUT_CHANNELS];

	/*
	 * Control signals from FMU.
	 */
	uint16_t	fmu_channel_data[PX4IO_OUTPUT_CHANNELS];

	/*
	 * Relay controls
	 */
	bool		relays[PX4IO_RELAY_CHANNELS];

	/*
	 * If true, we are using the FMU controls.
	 */
	bool		mixer_use_fmu;

	/*
	 * If true, state that should be reported to FMU has been updated.
	 */
	bool		fmu_report_due;

	/*
	 * If true, new control data from the FMU has been received.
	 */
	bool		fmu_data_received;

	/*
	 * Current serial interface mode, per the serial_rx_mode parameter
	 * in the config packet.
	 */
	uint8_t		serial_rx_mode;
};

extern struct sys_state_s system_state;

extern int frame_rx;
extern int frame_bad;

/*
 * Software countdown timers.
 *
 * Each timer counts down to zero at one tick per ms.
 */
#define TIMER_BLINK_AMBER	0
#define TIMER_BLINK_BLUE	1
#define TIMER_STATUS_PRINT	2
#define TIMER_SANITY		7
#define TIMER_NUM_TIMERS	8
extern volatile int	timers[TIMER_NUM_TIMERS];

/*
 * GPIO handling.
 */
#define LED_BLUE(_s)		stm32_gpiowrite(GPIO_LED1, !(_s))
#define LED_AMBER(_s)		stm32_gpiowrite(GPIO_LED2, !(_s))
#define LED_SAFETY(_s)		stm32_gpiowrite(GPIO_LED3, !(_s))

#define POWER_SERVO(_s)		stm32_gpiowrite(GPIO_SERVO_PWR_EN, (_s))
#define POWER_ACC1(_s)		stm32_gpiowrite(GPIO_SERVO_ACC1_EN, (_s))
#define POWER_ACC2(_s)		stm32_gpiowrite(GPIO_SERVO_ACC2_EN, (_s))
#define POWER_RELAY1(_s)	stm32_gpiowrite(GPIO_RELAY1_EN, (_s))
#define POWER_RELAY2(_s)	stm32_gpiowrite(GPIO_RELAY2_EN, (_s))

#define OVERCURRENT_ACC		stm32_gpioread(GPIO_ACC_OC_DETECT)
#define OVERCURRENT_SERVO	stm32_gpioread(GPIO_SERVO_OC_DETECT
#define BUTTON_SAFETY		stm32_gpioread(GPIO_BTN_SAFETY)

/*
 * Mixer
 */
extern int	mixer_init(void);

/*
 * Safety switch/LED.
 */
extern void	safety_init(void);

/*
 * FMU communications
 */
extern void	comms_init(void);
extern void	comms_check(void);

/*
 * Serial receiver decoders.
 */
extern void	dsm_init(unsigned mode);
extern void	dsm_input(int fd);
extern void	sbus_init(unsigned mode);
extern void	sbus_input(int fd);

/*
 * Assertion codes
 */
#define A_GPIO_OPEN_FAIL		100
#define A_SERVO_OPEN_FAIL		101
#define A_INPUTQ_OPEN_FAIL		102