185 lines
4.8 KiB
C
185 lines
4.8 KiB
C
/**
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******************************************************************************
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* @file stm32l0xx_hal_pwr_ex.c
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* @author MCD Application Team
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* @brief Extended PWR HAL module driver.
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* This file provides firmware functions to manage the following
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* functionalities of the Power Controller (PWR) peripheral:
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* + Extended Initialization and de-initialization functions
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* + Extended Peripheral Control functions
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright(c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32l0xx_hal.h"
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#ifdef HAL_PWR_MODULE_ENABLED
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/** @addtogroup STM32L0xx_HAL_Driver
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* @{
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*/
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/** @addtogroup PWREx
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* @{
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*/
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/** @addtogroup PWREx_Private
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* @{
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*/
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/** @defgroup PWR_Extended_TimeOut_Value PWREx Flag Setting Time Out Value
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* @{
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*/
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#define PWR_FLAG_SETTING_DELAY_US 50U
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/**
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* @}
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*/
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/**
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* @}
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*/
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/** @addtogroup PWREx_Exported_Functions
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* @brief Low Power modes configuration functions
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*
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@verbatim
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===============================================================================
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##### Peripheral extended features functions #####
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===============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Return Voltage Scaling Range.
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* @retval VOS bit field (PWR_REGULATOR_VOLTAGE_SCALE1, PWR_REGULATOR_VOLTAGE_SCALE2 or PWR_REGULATOR_VOLTAGE_SCALE3)
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*/
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uint32_t HAL_PWREx_GetVoltageRange(void)
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{
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return (PWR->CR & PWR_CR_VOS);
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}
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/**
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* @brief Enables the Fast WakeUp from Ultra Low Power mode.
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* @note This bit works in conjunction with ULP bit.
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* Means, when ULP = 1 and FWU = 1 :VREFINT startup time is ignored when
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* exiting from low power mode.
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* @retval None
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*/
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void HAL_PWREx_EnableFastWakeUp(void)
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{
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/* Enable the fast wake up */
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SET_BIT(PWR->CR, PWR_CR_FWU);
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}
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/**
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* @brief Disables the Fast WakeUp from Ultra Low Power mode.
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* @retval None
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*/
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void HAL_PWREx_DisableFastWakeUp(void)
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{
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/* Disable the fast wake up */
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CLEAR_BIT(PWR->CR, PWR_CR_FWU);
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}
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/**
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* @brief Enables the Ultra Low Power mode
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* @retval None
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*/
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void HAL_PWREx_EnableUltraLowPower(void)
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{
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/* Enable the Ultra Low Power mode */
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SET_BIT(PWR->CR, PWR_CR_ULP);
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}
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/**
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* @brief Disables the Ultra Low Power mode
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* @retval None
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*/
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void HAL_PWREx_DisableUltraLowPower(void)
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{
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/* Disable the Ultra Low Power mode */
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CLEAR_BIT(PWR->CR, PWR_CR_ULP);
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}
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/**
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* @brief Enable the Low Power Run mode.
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* @note Low power run mode can only be entered when VCORE is in range 2.
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* In addition, the dynamic voltage scaling must not be used when Low
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* power run mode is selected. Only Stop and Sleep modes with regulator
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* configured in Low power mode is allowed when Low power run mode is
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* selected.
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* @note The frequency of the system clock must be decreased to not exceed the
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* frequency of RCC_MSIRANGE_1.
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* @note In Low power run mode, all I/O pins keep the same state as in Run mode.
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* @retval None
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*/
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void HAL_PWREx_EnableLowPowerRunMode(void)
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{
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/* Enters the Low Power Run mode */
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SET_BIT(PWR->CR, PWR_CR_LPSDSR);
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SET_BIT(PWR->CR, PWR_CR_LPRUN);
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}
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/**
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* @brief Disable the Low Power Run mode.
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* @note Before HAL_PWREx_DisableLowPowerRunMode() completion, the function checks that
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* REGLPF has been properly reset (otherwise, HAL_PWREx_DisableLowPowerRunMode
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* returns HAL_TIMEOUT status). The system clock frequency can then be
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* increased above 2 MHz.
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* @retval HAL_StatusTypeDef
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*/
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HAL_StatusTypeDef HAL_PWREx_DisableLowPowerRunMode(void)
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{
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uint32_t wait_loop_index = 0U;
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/* Exit the Low Power Run mode */
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CLEAR_BIT(PWR->CR, PWR_CR_LPRUN);
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CLEAR_BIT(PWR->CR, PWR_CR_LPSDSR);
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/* Wait until REGLPF is reset */
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wait_loop_index = (PWR_FLAG_SETTING_DELAY_US * (SystemCoreClock / 1000000U));
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while ((wait_loop_index != 0U) && (HAL_IS_BIT_SET(PWR->CSR, PWR_CSR_REGLPF)))
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{
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wait_loop_index--;
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}
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if (HAL_IS_BIT_SET(PWR->CSR, PWR_CSR_REGLPF))
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{
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return HAL_TIMEOUT;
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}
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return HAL_OK;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* HAL_PWR_MODULE_ENABLED */
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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