main_chibios.c

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/*
 * Copyright (C) 2013-2015 Gautier Hattenberger, Alexandre Bustico
 *
 * 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.
 */
 
#include "mcu_periph/sys_time.h"
#include "mcu.h"
#include <ch.h>
 
#ifndef  SYS_TIME_FREQUENCY
#error SYS_TIME_FREQUENCY should be defined in Makefile.chibios or airframe.xml and be equal to CH_CFG_ST_FREQUENCY
#elif SYS_TIME_FREQUENCY != CH_CFG_ST_FREQUENCY
#error SYS_TIME_FREQUENCY should be equal to CH_CFG_ST_FREQUENCY
#elif  CH_CFG_ST_FREQUENCY < (2 * PERIODIC_FREQUENCY)
#error CH_CFG_ST_FREQUENCY and SYS_TIME_FREQUENCY should be >= 2 x PERIODIC_FREQUENCY
#endif
 
#include "firmwares/rotorcraft/main_ap.h"
 
#ifndef THD_WORKING_AREA_MAIN
#define THD_WORKING_AREA_MAIN 8192
#endif
 
/*
 * PPRZ/AP thread
 * Also include FBW on single MCU
 */
static void thd_ap(void *arg);
THD_WORKING_AREA(wa_thd_ap, THD_WORKING_AREA_MAIN);
static thread_t *apThdPtr = NULL;
 
int main(void)
{
  // Init
  main_init();
 
  chThdSleepMilliseconds(100);
 
  // Create threads
  apThdPtr = chThdCreateStatic(wa_thd_ap, sizeof(wa_thd_ap), NORMALPRIO, thd_ap, NULL);
 
  // Main loop, do nothing
  chThdSleep(TIME_INFINITE);
  return 0;
}
 
/*
 * PPRZ/AP thread
 *
 * Call PPRZ AP periodic and event functions
 */
static void thd_ap(void *arg)
{
  (void) arg;
  chRegSetThreadName("AP");
 
  while (!chThdShouldTerminateX()) {
    handle_periodic_tasks();
    main_event();
    // In tick mode, the minimum step is 1e6 / CH_CFG_ST_FREQUENCY
    // which means that whatever happens, if we do a sleep of this
    // time step, the next wakeup will be "aligned" and we won't see
    // jitter. The polling on event will also be as fast as possible
    // Be careful that in tick-less mode, it will be required to use
    // the chThdSleepUntil function with a correct computation of the
    // wakeup time, in particular roll-over should be check.
    chThdSleepMicroseconds(1000000 / CH_CFG_ST_FREQUENCY);
  }
 
  chThdExit(0);
}
 
/*
 * Terminate autopilot threads
 * Wait until proper stop
 */
void pprz_terminate_autopilot_threads(void)
{
  if (apThdPtr != NULL) {
    chThdTerminate(apThdPtr);
    chThdWait(apThdPtr);
    apThdPtr = NULL;
  }
}