tinySA/demos/ARMCM3-GENERIC-KERNEL/main.c

/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011,2012,2013 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT 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 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT 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 this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "ch.h"

#if !defined(SYSTEM_CLOCK)
#define SYSTEM_CLOCK 8000000
#endif

static uint32_t seconds_counter;
static uint32_t minutes_counter;

/*
 * This is a periodic thread that does absolutely nothing except increasing
 * the seconds counter.
 */
static WORKING_AREA(waThread1, 128);
static msg_t Thread1(void *arg) {

  (void)arg;
  while (TRUE) {
    chThdSleepMilliseconds(1000);
    seconds_counter++;
  }
}

/*
 * Application entry point.
 */
int main(void) {

  /**
   * Hardware initialization, in this simple demo just the systick timer is
   * initialized.
   */
  STBase->RVR = SYSTEM_CLOCK / CH_FREQUENCY - 1;
  STBase->CVR = 0;
  STBase->CSR = CLKSOURCE_CORE_BITS | ENABLE_ON_BITS | TICKINT_ENABLED_BITS;

  /*
   * System initializations.
   * - Kernel initialization, the main() function becomes a thread and the
   *   RTOS is active.
   */
  chSysInit();

  /*
   * Creates the example thread.
   */
  chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);

  /*
   * Normal main() thread activity, in this demo it does nothing except
   * increasing the minutes counter.
   */
  while (TRUE) {
    chThdSleepSeconds(60);
    minutes_counter++;
  }
}