swashplate_mixing.h

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/*
 * Copyright (C) 2015 C. De Wagter
 *               2015 Freek van Tienen <freek.v.tienen@gmail.com>
 *
 * 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, see
 * <http://www.gnu.org/licenses/>.
 */
#ifndef SWASHPLATE_MIXING_H
#define SWASHPLATE_MIXING_H
 
#include "std.h"
#include "paparazzi.h"
#include "generated/airframe.h"
 
/* Different type of swashplate mixings */
#define MECH 0
#define H120 1
#define HR120 2
 
#if SW_MIXING_TYPE == MECH
#define SW_NB 3
#define SW_FRONT   0
#define SW_RIGHT   1
#define SW_COLL    2
#define SW_MIXING_ROLL_COEF   {    0, -1,  0 }
#define SW_MIXING_PITCH_COEF  {    1,  0,  0 }
#define SW_MIXING_COLL_COEF   {    0,  0,  1 }
 
#elif SW_MIXING_TYPE == H120
#define SW_NB 3
#define SW_FRONT     0
#define SW_RIGHTBACK 1
#define SW_LEFTBACK  2
#define SW_MIXING_ROLL_COEF   {  0, -0.866,  0.866 }
#define SW_MIXING_PITCH_COEF  {  1, -0.5,   -0.5   }
#define SW_MIXING_COLL_COEF   {  1,  1,      1     }
 
#elif SW_MIXING_TYPE == HR120
#define SW_NB 3
#define SW_BACK       0
#define SW_LEFTFRONT  1
#define SW_RIGHTFRONT 2
#define SW_MIXING_ROLL_COEF   {  0,  0.866, -0.866 }
#define SW_MIXING_PITCH_COEF  { -1,  0.5,    0.5   }
#define SW_MIXING_COLL_COEF   {  1,  1,      1     }
#endif
 
/* Swashplate mixing structure */
struct swashplate_mixing_t {
  int32_t commands[SW_NB];      
  int32_t trim[SW_NB];          
};
struct swashplate_mixing_t {…};
extern struct swashplate_mixing_t swashplate_mixing;
 
/* External used functions */
extern void swashplate_mixing_init(void);
extern void swashplate_mixing_run(pprz_t in_cmd[]);
 
#endif