main_ap.c

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/*
 * Copyright (C) 2008-2021 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, see
 * <http://www.gnu.org/licenses/>.
 *
 */
 
#define MODULES_C
 
#define ABI_C
 
#include "main_ap.h"
#include "generated/airframe.h"
#include "generated/modules.h"
#include "modules/core/abi.h"
 
#ifdef USE_NPS
#include "nps_autopilot.h"
#endif
 
/* if PRINT_CONFIG is defined, print some config options */
PRINT_CONFIG_VAR(PERIODIC_FREQUENCY)
/* SYS_TIME_FREQUENCY/PERIODIC_FREQUENCY should be an integer, otherwise the timer will not be correct */
#if !(SYS_TIME_FREQUENCY/PERIODIC_FREQUENCY*PERIODIC_FREQUENCY == SYS_TIME_FREQUENCY)
#warning "The SYS_TIME_FREQUENCY can not be divided by PERIODIC_FREQUENCY. Make sure this is the case for correct timing."
#endif
 
/* TELEMETRY_FREQUENCY is defined in generated/periodic_telemetry.h
 * defaults to 60Hz or set by TELEMETRY_FREQUENCY configure option in airframe file
 */
PRINT_CONFIG_VAR(TELEMETRY_FREQUENCY)
 
#if USE_AHRS && USE_IMU && (defined AHRS_PROPAGATE_FREQUENCY)
#if (AHRS_PROPAGATE_FREQUENCY > PERIODIC_FREQUENCY)
#warning "PERIODIC_FREQUENCY should be least equal or greater than AHRS_PROPAGATE_FREQUENCY"
INFO_VALUE("it is recommended to configure in your airframe PERIODIC_FREQUENCY to at least ", AHRS_PROPAGATE_FREQUENCY)
#endif
#endif
 
tid_t modules_mcu_core_tid; // single step
tid_t modules_sensors_tid;
tid_t modules_radio_control_tid;
tid_t modules_gnc_tid; // estimation, control, actuators, default in a single step
tid_t modules_datalink_tid;
 
#define SYS_PERIOD (1.f / PERIODIC_FREQUENCY)
#define SENSORS_PERIOD (1.f / PERIODIC_FREQUENCY)
#define DATALINK_PERIOD (1.f / TELEMETRY_FREQUENCY)
 
void main_ap_init(void)
{
  // mcu init done in main
 
  modules_core_init();
  modules_sensors_init();
  modules_estimation_init();
  modules_radio_control_init();
  modules_control_init();
  modules_actuators_init();
  modules_datalink_init();
  modules_default_init();
 
  // register timers with temporal dependencies
  modules_sensors_tid = sys_time_register_timer(SENSORS_PERIOD, NULL);
 
  // common GNC group (estimation, control, actuators, default)
  // is called with an offset of half the main period (1/PERIODIC_FREQUENCY)
  // which is the default resolution of SYS_TIME_FREQUENCY,
  // hence the resolution of the virtual timers.
  // In practice, this is the best compromised between having enough time between
  // the sensor readings (triggerd in sensors task group) and the lag between
  // the state update and control/actuators update
  //
  //      |      PERIODIC_FREQ       |
  //      |            |             |
  //      read         gnc
  //
  modules_gnc_tid = sys_time_register_timer_offset(modules_sensors_tid, 1.f / (2.f * PERIODIC_FREQUENCY), NULL);
 
  // register the timers for the periodic functions
  modules_mcu_core_tid = sys_time_register_timer(SYS_PERIOD, NULL);
  modules_radio_control_tid = sys_time_register_timer((1. / 60.), NULL); // FIXME
  modules_datalink_tid = sys_time_register_timer(DATALINK_PERIOD, NULL);
 
  // Do a failsafe check first
  autopilot_failsafe_checks();
 
}
 
void main_ap_periodic(void)
{
  if (sys_time_check_and_ack_timer(modules_sensors_tid)) {
    modules_sensors_periodic_task();
  }
 
  if (sys_time_check_and_ack_timer(modules_radio_control_tid)) {
    modules_radio_control_periodic_task();
  }
 
  if (sys_time_check_and_ack_timer(modules_gnc_tid)) {
    modules_estimation_periodic_task();
    modules_control_periodic_task();
    modules_default_periodic_task();
    modules_actuators_periodic_task();
  }
 
  if (sys_time_check_and_ack_timer(modules_mcu_core_tid)) {
    modules_mcu_periodic_task();
    modules_core_periodic_task();
  }
 
  if (sys_time_check_and_ack_timer(modules_datalink_tid)) {
    modules_datalink_periodic_task();
  }
}
 
void main_ap_event(void)
{
  modules_mcu_event_task();
  modules_core_event_task();
  modules_sensors_event_task();
  modules_estimation_event_task();
  modules_radio_control_event_task();
  modules_control_event_task();
  modules_actuators_event_task();
  modules_datalink_event_task();
  modules_default_event_task();
}