spd-lorabees/Middlewares/Third_Party/Lora/Utilities/low_power.c

 /*******************************************************************************
  * @file    low_power.c
  * @author  MCD Application Team
  * @version V1.1.2
  * @date    08-September-2017
  * @brief   driver for low power
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics International N.V. 
  * All rights reserved.</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without 
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  *    derived from this software without specific written permission.
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  *    microprocessor devices manufactured by or for STMicroelectronics.
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  ******************************************************************************
  */
  
/* Includes ------------------------------------------------------------------*/
#include "hw.h"
#include "low_power.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/

/**
 * \brief Flag to indicate if MCU can go to low power mode
 *        When 0, MCU is authorized to go in low power mode
 */
static uint32_t LowPower_State = 0;

/* Private function prototypes -----------------------------------------------*/



/* Exported functions ---------------------------------------------------------*/

/**
 * \brief API to set flag allowing power mode
 *
 * \param [IN] enum e_LOW_POWER_State_Id_t  
 */
void LowPower_Disable( e_LOW_POWER_State_Id_t state )
{
  BACKUP_PRIMASK();
  
  DISABLE_IRQ( );
  
  LowPower_State |= state;

  RESTORE_PRIMASK( );
}

/**
 * \brief API to reset flag allowing power mode
 *
 * \param [IN] enum e_LOW_POWER_State_Id_t 
 */
void LowPower_Enable( e_LOW_POWER_State_Id_t state )
{
  BACKUP_PRIMASK();
  
  DISABLE_IRQ( );
  
  LowPower_State &= ~state;
  
  RESTORE_PRIMASK( );
}

/**
 * \brief API to get flag allowing power mode
 * \note When flag is 0, low power mode is allowed
 * \param [IN] state
 * \retval flag state 
 */
uint32_t LowPower_GetState( void )
{
  return LowPower_State;
}

/**
 * @brief  Handle Low Power
 * @param  None
 * @retval None
 */

void LowPower_Handler( void )
{
  DBG_GPIO_RST(GPIOB, GPIO_PIN_15);
  
  DBG_GPIO_RST(GPIOB, GPIO_PIN_14);
  
  if ( LowPower_State == 0 )
  {    
    
    DBG_PRINTF_CRITICAL("dz\n\r");
    
    HW_EnterStopMode( );
    
    /* mcu dependent. to be implemented by user*/
    HW_ExitStopMode();
    
    DBG_GPIO_SET(GPIOB, GPIO_PIN_15);
    
    HW_RTC_setMcuWakeUpTime( );
  }
  else
  {
    DBG_PRINTF_CRITICAL("z\n\r");
    
    HW_EnterSleepMode( );

    DBG_GPIO_SET(GPIOB, GPIO_PIN_14);
  }
  
}
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/