rover_datalink.c

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/*
 * Copyright (C) 2018 Gautier Hattenberger <gautier.hattenberger@enac.fr>
 *
 * 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/>.
 */
 
#include "subsystems/datalink/datalink.h"
 
#include "pprzlink/dl_protocol.h"
 
#ifdef USE_NAVIGATION
#include "firmwares/rover/navigation.h"
#include "math/pprz_geodetic_int.h"
#endif
 
#include "autopilot.h"
 
void firmware_parse_msg(struct link_device *dev __attribute__((unused)), struct transport_tx *trans __attribute__((unused)), uint8_t *buf)
{
  uint8_t msg_id = IdOfPprzMsg(buf);
 
  /* parse telemetry messages coming from ground station */
  switch (msg_id) {
 
#ifdef USE_NAVIGATION
    case DL_BLOCK : {
      if (DL_BLOCK_ac_id(buf) != AC_ID) { break; }
      nav_goto_block(DL_BLOCK_block_id(buf));
    }
    break;
 
    case DL_MOVE_WP : {
      uint8_t ac_id = DL_MOVE_WP_ac_id(buf);
      if (ac_id != AC_ID) { break; }
      if (stateIsLocalCoordinateValid()) {
        uint8_t wp_id = DL_MOVE_WP_wp_id(buf);
        struct LlaCoor_i lla;
        lla.lat = DL_MOVE_WP_lat(buf);
        lla.lon = DL_MOVE_WP_lon(buf);
        /* WP_alt from message is alt above MSL in mm
         * lla.alt is above ellipsoid in mm
         */
        lla.alt = DL_MOVE_WP_alt(buf) - state.ned_origin_i.hmsl +
                  state.ned_origin_i.lla.alt;
        waypoint_move_lla(wp_id, &lla);
      }
    }
    break;
#endif /* USE_NAVIGATION */
 
    default:
      break;
  }
}