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/**
******************************************************************************
* @file stm32l0xx_hal_pwr_ex.c
* @author MCD Application Team
* @version V1.2.0
* @date 06-February-2015
* @brief Extended PWR HAL module driver.
* This file provides firmware functions to manage the following
* functionalities of the Power Controller (PWR) peripheral:
* + Extended Initialization and de-initialization functions
* + Extended Peripheral Control functions
*
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
*
* 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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l0xx_hal.h"
#ifdef HAL_PWR_MODULE_ENABLED
/** @addtogroup STM32L0xx_HAL_Driver
* @{
*/
/** @addtogroup PWREx
* @{
*/
/** @defgroup PWR_Extended_TimeOut_Value PWR Extended Flag Setting Time Out Value
* @{
*/
#define PWR_FLAG_SETTING_DELAY_US 50
/**
* @}
*/
/** @addtogroup PWREx_Exported_Functions
* @brief Low Power modes configuration functions
*
@verbatim
===============================================================================
##### Peripheral extended features functions #####
===============================================================================
@endverbatim
* @{
*/
/**
* @brief Enables the Fast WakeUp from Ultra Low Power mode.
* @note This bit works in conjunction with ULP bit.
* Means, when ULP = 1 and FWU = 1 :VREFINT startup time is ignored when
* exiting from low power mode.
* @retval None
*/
void HAL_PWREx_EnableFastWakeUp(void)
{
/* Enable the fast wake up */
SET_BIT(PWR->CR, PWR_CR_FWU);
}
/**
* @brief Disables the Fast WakeUp from Ultra Low Power mode.
* @retval None
*/
void HAL_PWREx_DisableFastWakeUp(void)
{
/* Disable the fast wake up */
CLEAR_BIT(PWR->CR, PWR_CR_FWU);
}
/**
* @brief Enables the Ultra Low Power mode
* @retval None
*/
void HAL_PWREx_EnableUltraLowPower(void)
{
/* Enable the Ultra Low Power mode */
SET_BIT(PWR->CR, PWR_CR_ULP);
}
/**
* @brief Disables the Ultra Low Power mode
* @retval None
*/
void HAL_PWREx_DisableUltraLowPower(void)
{
/* Disable the Ultra Low Power mode */
CLEAR_BIT(PWR->CR, PWR_CR_ULP);
}
/**
* @brief Enable the Low Power Run mode.
* @note Low power run mode can only be entered when VCORE is in range 2.
* In addition, the dynamic voltage scaling must not be used when Low
* power run mode is selected. Only Stop and Sleep modes with regulator
* configured in Low power mode is allowed when Low power run mode is
* selected.
* @note The frequency of the system clock must be decreased to not exceed the
* frequency of RCC_MSIRANGE_1.
* @note In Low power run mode, all I/O pins keep the same state as in Run mode.
* @retval None
*/
void HAL_PWREx_EnableLowPowerRunMode(void)
{
/* Enters the Low Power Run mode */
SET_BIT(PWR->CR, PWR_CR_LPSDSR);
SET_BIT(PWR->CR, PWR_CR_LPRUN);
}
/**
* @brief Disable the Low Power Run mode.
* @note Before HAL_PWREx_DisableLowPowerRunMode() completion, the function checks that
* REGLPF has been properly reset (otherwise, HAL_PWREx_DisableLowPowerRunMode
* returns HAL_TIMEOUT status). The system clock frequency can then be
* increased above 2 MHz.
* @retval HAL_StatusTypeDef
*/
HAL_StatusTypeDef HAL_PWREx_DisableLowPowerRunMode(void)
{
uint32_t wait_loop_index = 0;
/* Exit the Low Power Run mode */
CLEAR_BIT(PWR->CR, PWR_CR_LPRUN);
CLEAR_BIT(PWR->CR, PWR_CR_LPSDSR);
/* Wait until REGLPF is reset */
wait_loop_index = (PWR_FLAG_SETTING_DELAY_US * (SystemCoreClock / 1000000));
while ((wait_loop_index != 0) && (HAL_IS_BIT_SET(PWR->CSR, PWR_CSR_REGLPF)))
{
wait_loop_index--;
}
if (HAL_IS_BIT_SET(PWR->CSR, PWR_CSR_REGLPF))
{
return HAL_TIMEOUT;
}
return HAL_OK;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* HAL_PWR_MODULE_ENABLED */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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