/*
* Copyright (C) 2012 The Paparazzi Team
*
* This file is part of paparazzi.
*
* paparazzi is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* paparazzi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with paparazzi; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/

/**
* @file firmwares/rotorcraft/autopilot_rc_helpers.h
*
* Some helper functions to check RC sticks.
*/

#ifndef AUTOPILOT_RC_HELPERS_H
#define AUTOPILOT_RC_HELPERS_H

#include "generated/airframe.h"
#include "subsystems/radio_control.h"

#define AUTOPILOT_THROTTLE_THRESHOLD (MAX_PPRZ / 20)
#define AUTOPILOT_YAW_THRESHOLD (MAX_PPRZ * 19 / 20)
#ifndef AUTOPILOT_STICK_CENTER_THRESHOLD
#define AUTOPILOT_STICK_CENTER_THRESHOLD (MAX_PPRZ * 1 / 20)
#endif

#define THROTTLE_STICK_DOWN() \
(radio_control.values[RADIO_THROTTLE] < AUTOPILOT_THROTTLE_THRESHOLD)

/**
Originale Variable

#define YAW_STICK_PUSHED() \
(radio_control.values[RADIO_YAW] > AUTOPILOT_YAW_THRESHOLD || \
radio_control.values[RADIO_YAW] < -AUTOPILOT_YAW_THRESHOLD)   

YAW_STICK_PUSHED gilt, wenn der Hebel ENTWEDER nach links ODER rechts gedrückt wird.
*/

/**
Geänderte Variablen

Für die rechte (NEGATIVE) und linke (POSITIVE) Heblestellung gibt es separate Variablen
*/

#define YAW_STICK_PUSHED_POSITIVE() \
(radio_control.values[RADIO_YAW] > AUTOPILOT_YAW_THRESHOLD)
#define YAW_STICK_PUSHED_NEGATIVE() \
(radio_control.values[RADIO_YAW] < -AUTOPILOT_YAW_THRESHOLD)
#define YAW_STICK_CENTERED() \
(radio_control.values[RADIO_YAW] < AUTOPILOT_STICK_CENTER_THRESHOLD && \
radio_control.values[RADIO_YAW] > -AUTOPILOT_STICK_CENTER_THRESHOLD)
#define PITCH_STICK_CENTERED() \
(radio_control.values[RADIO_PITCH] < AUTOPILOT_STICK_CENTER_THRESHOLD && \
radio_control.values[RADIO_PITCH] > -AUTOPILOT_STICK_CENTER_THRESHOLD)
#define ROLL_STICK_CENTERED() \
(radio_control.values[RADIO_ROLL] < AUTOPILOT_STICK_CENTER_THRESHOLD && \
radio_control.values[RADIO_ROLL] > -AUTOPILOT_STICK_CENTER_THRESHOLD)

static inline bool_t rc_attitude_sticks_centered(void) {
  return ROLL_STICK_CENTERED() && PITCH_STICK_CENTERED() && YAW_STICK_CENTERED();
}

#ifdef RADIO_KILL_SWITCH
static inline bool_t kill_switch_is_on(void) {
  if (radio_control.values[RADIO_KILL_SWITCH] < 0)
    return TRUE;
  else
    return FALSE;
}
#else
static inline bool_t kill_switch_is_on(void) {
  return FALSE;
}
#endif

static inline uint8_t percent_from_rc(int channel)
{
  int per = (MAX_PPRZ + (int32_t)radio_control.values[channel]) * 50 / MAX_PPRZ;
  if (per < 0)
    per = 0;
  else if (per > 100)
    per = 100;
  return per;
}


#endif /* AUTOPILOT_RC_HELPERS_H */