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RIOT/cpu/saml21/periph/pm.c 1.31 KB
a752c7ab   elopes   add first test an...
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  /*
   * Copyright (C) 2017 Kaspar Schleiser <kaspar@schleiser.de>
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  /**
   * @ingroup     cpu_saml21
   * @ingroup     drivers_periph_pm
   * @{
   *
   * @file
   * @brief       Implementation of the kernels power management interface
   *
   * @author      Kaspar Schleiser <kaspar@schleiser.de>
   *
   * @}
   */
  
  #include "periph/pm.h"
  
  #define ENABLE_DEBUG (0)
  #include "debug.h"
  
  void pm_set(unsigned mode)
  {
      if (mode < PM_NUM_MODES) {
          uint32_t _mode;
  
          switch (mode) {
              case 0:
                  DEBUG("pm_set(): setting BACKUP mode.\n");
                  _mode = PM_SLEEPCFG_SLEEPMODE_BACKUP;
                  break;
              case 1:
                  DEBUG("pm_set(): setting STANDBY mode.\n");
                  _mode = PM_SLEEPCFG_SLEEPMODE_STANDBY;
                  break;
              case 2:
                  DEBUG("pm_set(): setting IDLE mode.\n");
                  _mode = PM_SLEEPCFG_SLEEPMODE_IDLE2;
                  break;
          }
  
          /* write sleep configuration */
          PM->SLEEPCFG.bit.SLEEPMODE = _mode;
          /* make sure value has been set */
          while (PM->SLEEPCFG.bit.SLEEPMODE != _mode) {}
      }
  
      cortexm_sleep(0);
  }