text: /* mbed Microcontroller Library
   *******************************************************************************
   * Copyright (c) 2015, STMicroelectronics
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 3. Neither the name of STMicroelectronics nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *******************************************************************************
   */
  #include "sleep_api.h"
  
  #if DEVICE_SLEEP
  
  #include "cmsis.h"
  #include "hal_tick.h"
  
  static TIM_HandleTypeDef TimMasterHandle;
  
  void sleep(void)
  {
      // Disable HAL tick interrupt
      TimMasterHandle.Instance = TIM_MST;
      __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
  
      // Request to enter SLEEP mode
      HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
  
      // Enable HAL tick interrupt
      __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
  }
  
  void deepsleep(void)
  {
      // Disable HAL tick interrupt
      TimMasterHandle.Instance = TIM_MST;
      __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
  
      // Request to enter STOP mode with regulator in low power mode
      HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
  
      // After wake-up from STOP reconfigure the PLL
      SetSysClock();
  
      // Enable HAL tick interrupt
      __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
  }
  
  #endif
  