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Diffstat (limited to 'c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr_ex.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr_ex.c | 648 |
1 files changed, 648 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr_ex.c b/c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr_ex.c new file mode 100644 index 0000000000..fb7e62937e --- /dev/null +++ b/c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr_ex.c @@ -0,0 +1,648 @@ +/** + ****************************************************************************** + * @file stm32f4xx_hal_pwr_ex.c + * @author MCD Application Team + * @version V1.4.0 + * @date 14-August-2015 + * @brief Extended PWR HAL module driver. + * This file provides firmware functions to manage the following + * functionalities of PWR extension peripheral: + * + Peripheral Extended features 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 "stm32f4xx_hal.h" + +/** @addtogroup STM32F4xx_HAL_Driver + * @{ + */ + +/** @defgroup PWREx PWREx + * @brief PWR HAL module driver + * @{ + */ + +#ifdef HAL_PWR_MODULE_ENABLED + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/** @addtogroup PWREx_Private_Constants + * @{ + */ +#define PWR_OVERDRIVE_TIMEOUT_VALUE 1000 +#define PWR_UDERDRIVE_TIMEOUT_VALUE 1000 +#define PWR_BKPREG_TIMEOUT_VALUE 1000 +#define PWR_VOSRDY_TIMEOUT_VALUE 1000 +/** + * @} + */ + + +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ +/** @defgroup PWREx_Exported_Functions PWREx Exported Functions + * @{ + */ + +/** @defgroup PWREx_Exported_Functions_Group1 Peripheral Extended features functions + * @brief Peripheral Extended features functions + * +@verbatim + + =============================================================================== + ##### Peripheral extended features functions ##### + =============================================================================== + + *** Main and Backup Regulators configuration *** + ================================================ + [..] + (+) The backup domain includes 4 Kbytes of backup SRAM accessible only from + the CPU, and address in 32-bit, 16-bit or 8-bit mode. Its content is + retained even in Standby or VBAT mode when the low power backup regulator + is enabled. It can be considered as an internal EEPROM when VBAT is + always present. You can use the HAL_PWREx_EnableBkUpReg() function to + enable the low power backup regulator. + + (+) When the backup domain is supplied by VDD (analog switch connected to VDD) + the backup SRAM is powered from VDD which replaces the VBAT power supply to + save battery life. + + (+) The backup SRAM is not mass erased by a tamper event. It is read + protected to prevent confidential data, such as cryptographic private + key, from being accessed. The backup SRAM can be erased only through + the Flash interface when a protection level change from level 1 to + level 0 is requested. + -@- Refer to the description of Read protection (RDP) in the Flash + programming manual. + + (+) The main internal regulator can be configured to have a tradeoff between + performance and power consumption when the device does not operate at + the maximum frequency. This is done through __HAL_PWR_MAINREGULATORMODE_CONFIG() + macro which configure VOS bit in PWR_CR register + + Refer to the product datasheets for more details. + + *** FLASH Power Down configuration **** + ======================================= + [..] + (+) By setting the FPDS bit in the PWR_CR register by using the + HAL_PWREx_EnableFlashPowerDown() function, the Flash memory also enters power + down mode when the device enters Stop mode. When the Flash memory + is in power down mode, an additional startup delay is incurred when + waking up from Stop mode. + + (+) For STM32F42xxx/43xxx/446xx/469xx/479xx Devices, the scale can be modified only when the PLL + is OFF and the HSI or HSE clock source is selected as system clock. + The new value programmed is active only when the PLL is ON. + When the PLL is OFF, the voltage scale 3 is automatically selected. + Refer to the datasheets for more details. + + *** Over-Drive and Under-Drive configuration **** + ================================================= + [..] + (+) For STM32F42xxx/43xxx/446xx/469xx/479xx Devices, in Run mode: the main regulator has + 2 operating modes available: + (++) Normal mode: The CPU and core logic operate at maximum frequency at a given + voltage scaling (scale 1, scale 2 or scale 3) + (++) Over-drive mode: This mode allows the CPU and the core logic to operate at a + higher frequency than the normal mode for a given voltage scaling (scale 1, + scale 2 or scale 3). This mode is enabled through HAL_PWREx_EnableOverDrive() function and + disabled by HAL_PWREx_DisableOverDrive() function, to enter or exit from Over-drive mode please follow + the sequence described in Reference manual. + + (+) For STM32F42xxx/43xxx/446xx/469xx/479xx Devices, in Stop mode: the main regulator or low power regulator + supplies a low power voltage to the 1.2V domain, thus preserving the content of registers + and internal SRAM. 2 operating modes are available: + (++) Normal mode: the 1.2V domain is preserved in nominal leakage mode. This mode is only + available when the main regulator or the low power regulator is used in Scale 3 or + low voltage mode. + (++) Under-drive mode: the 1.2V domain is preserved in reduced leakage mode. This mode is only + available when the main regulator or the low power regulator is in low voltage mode. + +@endverbatim + * @{ + */ + +/** + * @brief Enables the Backup Regulator. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_PWREx_EnableBkUpReg(void) +{ + uint32_t tickstart = 0; + + *(__IO uint32_t *) CSR_BRE_BB = (uint32_t)ENABLE; + + /* Get tick */ + tickstart = HAL_GetTick(); + + /* Wait till Backup regulator ready flag is set */ + while(__HAL_PWR_GET_FLAG(PWR_FLAG_BRR) == RESET) + { + if((HAL_GetTick() - tickstart ) > PWR_BKPREG_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + return HAL_OK; +} + +/** + * @brief Disables the Backup Regulator. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_PWREx_DisableBkUpReg(void) +{ + uint32_t tickstart = 0; + + *(__IO uint32_t *) CSR_BRE_BB = (uint32_t)DISABLE; + + /* Get tick */ + tickstart = HAL_GetTick(); + + /* Wait till Backup regulator ready flag is set */ + while(__HAL_PWR_GET_FLAG(PWR_FLAG_BRR) != RESET) + { + if((HAL_GetTick() - tickstart ) > PWR_BKPREG_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + return HAL_OK; +} + +/** + * @brief Enables the Flash Power Down in Stop mode. + * @retval None + */ +void HAL_PWREx_EnableFlashPowerDown(void) +{ + *(__IO uint32_t *) CR_FPDS_BB = (uint32_t)ENABLE; +} + +/** + * @brief Disables the Flash Power Down in Stop mode. + * @retval None + */ +void HAL_PWREx_DisableFlashPowerDown(void) +{ + *(__IO uint32_t *) CR_FPDS_BB = (uint32_t)DISABLE; +} + +/** + * @brief Return Voltage Scaling Range. + * @retval The configured scale for the regulator voltage(VOS bit field). + * The returned value can be one of the following: + * - @arg PWR_REGULATOR_VOLTAGE_SCALE1: Regulator voltage output Scale 1 mode + * - @arg PWR_REGULATOR_VOLTAGE_SCALE2: Regulator voltage output Scale 2 mode + * - @arg PWR_REGULATOR_VOLTAGE_SCALE3: Regulator voltage output Scale 3 mode + */ +uint32_t HAL_PWREx_GetVoltageRange(void) +{ + return (PWR->CR & PWR_CR_VOS); +} + +#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) +/** + * @brief Configures the main internal regulator output voltage. + * @param VoltageScaling: specifies the regulator output voltage to achieve + * a tradeoff between performance and power consumption. + * This parameter can be one of the following values: + * @arg PWR_REGULATOR_VOLTAGE_SCALE1: Regulator voltage output range 1 mode, + * the maximum value of fHCLK = 168 MHz. + * @arg PWR_REGULATOR_VOLTAGE_SCALE2: Regulator voltage output range 2 mode, + * the maximum value of fHCLK = 144 MHz. + * @note When moving from Range 1 to Range 2, the system frequency must be decreased to + * a value below 144 MHz before calling HAL_PWREx_ConfigVoltageScaling() API. + * When moving from Range 2 to Range 1, the system frequency can be increased to + * a value up to 168 MHz after calling HAL_PWREx_ConfigVoltageScaling() API. + * @retval HAL Status + */ +HAL_StatusTypeDef HAL_PWREx_ControlVoltageScaling(uint32_t VoltageScaling) +{ + uint32_t tickstart = 0; + + assert_param(IS_PWR_VOLTAGE_SCALING_RANGE(VoltageScaling)); + + /* Enable PWR RCC Clock Peripheral */ + __HAL_RCC_PWR_CLK_ENABLE(); + + /* Set Range */ + __HAL_PWR_VOLTAGESCALING_CONFIG(VoltageScaling); + + /* Get Start Tick*/ + tickstart = HAL_GetTick(); + while((__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY) == RESET)) + { + if((HAL_GetTick() - tickstart ) > PWR_VOSRDY_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + return HAL_OK; +} + +#elif defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) || \ + defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F410Tx) || defined(STM32F410Cx) || \ + defined(STM32F410Rx) || defined(STM32F411xE) || defined(STM32F446xx) || defined(STM32F469xx) || \ + defined(STM32F479xx) +/** + * @brief Configures the main internal regulator output voltage. + * @param VoltageScaling: specifies the regulator output voltage to achieve + * a tradeoff between performance and power consumption. + * This parameter can be one of the following values: + * @arg PWR_REGULATOR_VOLTAGE_SCALE1: Regulator voltage output range 1 mode, + * the maximum value of fHCLK is 168 MHz. It can be extended to + * 180 MHz by activating the over-drive mode. + * @arg PWR_REGULATOR_VOLTAGE_SCALE2: Regulator voltage output range 2 mode, + * the maximum value of fHCLK is 144 MHz. It can be extended to, + * 168 MHz by activating the over-drive mode. + * @arg PWR_REGULATOR_VOLTAGE_SCALE3: Regulator voltage output range 3 mode, + * the maximum value of fHCLK is 120 MHz. + * @note To update the system clock frequency(SYSCLK): + * - Set the HSI or HSE as system clock frequency using the HAL_RCC_ClockConfig(). + * - Call the HAL_RCC_OscConfig() to configure the PLL. + * - Call HAL_PWREx_ConfigVoltageScaling() API to adjust the voltage scale. + * - Set the new system clock frequency using the HAL_RCC_ClockConfig(). + * @note The scale can be modified only when the HSI or HSE clock source is selected + * as system clock source, otherwise the API returns HAL_ERROR. + * @note When the PLL is OFF, the voltage scale 3 is automatically selected and the VOS bits + * value in the PWR_CR1 register are not taken in account. + * @note This API forces the PLL state ON to allow the possibility to configure the voltage scale 1 or 2. + * @note The new voltage scale is active only when the PLL is ON. + * @retval HAL Status + */ +HAL_StatusTypeDef HAL_PWREx_ControlVoltageScaling(uint32_t VoltageScaling) +{ + uint32_t tickstart = 0; + + assert_param(IS_PWR_VOLTAGE_SCALING_RANGE(VoltageScaling)); + + /* Enable PWR RCC Clock Peripheral */ + __HAL_RCC_PWR_CLK_ENABLE(); + + /* Check if the PLL is used as system clock or not */ + if(__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_CFGR_SWS_PLL) + { + /* Disable the main PLL */ + __HAL_RCC_PLL_DISABLE(); + + /* Get Start Tick */ + tickstart = HAL_GetTick(); + /* Wait till PLL is disabled */ + while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET) + { + if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Set Range */ + __HAL_PWR_VOLTAGESCALING_CONFIG(VoltageScaling); + + /* Enable the main PLL */ + __HAL_RCC_PLL_ENABLE(); + + /* Get Start Tick */ + tickstart = HAL_GetTick(); + /* Wait till PLL is ready */ + while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET) + { + if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Get Start Tick */ + tickstart = HAL_GetTick(); + while((__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY) == RESET)) + { + if((HAL_GetTick() - tickstart ) > PWR_VOSRDY_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + } + else + { + return HAL_ERROR; + } + + return HAL_OK; +} +#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx */ + +#if defined(STM32F469xx) || defined(STM32F479xx) +/** + * @brief Enables Wakeup Pin Detection on high level (rising edge). + * @retval None + */ +void HAL_PWREx_EnableWakeUpPinPolarityRisingEdge(void) +{ + *(__IO uint32_t *) CSR_WUPP_BB = (uint32_t)DISABLE; +} + +/** + * @brief Enables Wakeup Pin Detection on low level (falling edge). + * @retval None + */ +void HAL_PWREx_EnableWakeUpPinPolarityFallingEdge(void) +{ + *(__IO uint32_t *) CSR_WUPP_BB = (uint32_t)ENABLE; +} +#endif /* STM32F469xx || STM32F479xx */ + +#if defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F410Tx) || defined(STM32F410Cx) || defined(STM32F410Rx) ||\ + defined(STM32F411xE) +/** + * @brief Enables Main Regulator low voltage mode. + * @note This mode is only available for STM32F401xx/STM32F410xx/STM32F411xx devices. + * @retval None + */ +void HAL_PWREx_EnableMainRegulatorLowVoltage(void) +{ + *(__IO uint32_t *) CR_MRLVDS_BB = (uint32_t)ENABLE; +} + +/** + * @brief Disables Main Regulator low voltage mode. + * @note This mode is only available for STM32F401xx/STM32F410xx/STM32F411xx devices. + * @retval None + */ +void HAL_PWREx_DisableMainRegulatorLowVoltage(void) +{ + *(__IO uint32_t *) CR_MRLVDS_BB = (uint32_t)DISABLE; +} + +/** + * @brief Enables Low Power Regulator low voltage mode. + * @note This mode is only available for STM32F401xx/STM32F410xx/STM32F411xx devices. + * @retval None + */ +void HAL_PWREx_EnableLowRegulatorLowVoltage(void) +{ + *(__IO uint32_t *) CR_LPLVDS_BB = (uint32_t)ENABLE; +} + +/** + * @brief Disables Low Power Regulator low voltage mode. + * @note This mode is only available for STM32F401xx/STM32F410xx/STM32F411xx devices. + * @retval None + */ +void HAL_PWREx_DisableLowRegulatorLowVoltage(void) +{ + *(__IO uint32_t *) CR_LPLVDS_BB = (uint32_t)DISABLE; +} + +#endif /* STM32F401xC || STM32F401xE || STM32F410xx || STM32F411xE */ + +#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\ + defined(STM32F446xx) || defined(STM32F469xx) || defined(STM32F479xx) +/** + * @brief Activates the Over-Drive mode. + * @note This function can be used only for STM32F42xx/STM32F43xx/STM32F446xx/STM32F469xx/STM32F479xx devices. + * This mode allows the CPU and the core logic to operate at a higher frequency + * than the normal mode for a given voltage scaling (scale 1, scale 2 or scale 3). + * @note It is recommended to enter or exit Over-drive mode when the application is not running + * critical tasks and when the system clock source is either HSI or HSE. + * During the Over-drive switch activation, no peripheral clocks should be enabled. + * The peripheral clocks must be enabled once the Over-drive mode is activated. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_PWREx_EnableOverDrive(void) +{ + uint32_t tickstart = 0; + + __HAL_RCC_PWR_CLK_ENABLE(); + + /* Enable the Over-drive to extend the clock frequency to 180 Mhz */ + __HAL_PWR_OVERDRIVE_ENABLE(); + + /* Get tick */ + tickstart = HAL_GetTick(); + + while(!__HAL_PWR_GET_FLAG(PWR_FLAG_ODRDY)) + { + if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Enable the Over-drive switch */ + __HAL_PWR_OVERDRIVESWITCHING_ENABLE(); + + /* Get tick */ + tickstart = HAL_GetTick(); + + while(!__HAL_PWR_GET_FLAG(PWR_FLAG_ODSWRDY)) + { + if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + return HAL_OK; +} + +/** + * @brief Deactivates the Over-Drive mode. + * @note This function can be used only for STM32F42xx/STM32F43xx/STM32F446xx/STM32F469xx/STM32F479xx devices. + * This mode allows the CPU and the core logic to operate at a higher frequency + * than the normal mode for a given voltage scaling (scale 1, scale 2 or scale 3). + * @note It is recommended to enter or exit Over-drive mode when the application is not running + * critical tasks and when the system clock source is either HSI or HSE. + * During the Over-drive switch activation, no peripheral clocks should be enabled. + * The peripheral clocks must be enabled once the Over-drive mode is activated. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_PWREx_DisableOverDrive(void) +{ + uint32_t tickstart = 0; + + __HAL_RCC_PWR_CLK_ENABLE(); + + /* Disable the Over-drive switch */ + __HAL_PWR_OVERDRIVESWITCHING_DISABLE(); + + /* Get tick */ + tickstart = HAL_GetTick(); + + while(__HAL_PWR_GET_FLAG(PWR_FLAG_ODSWRDY)) + { + if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Disable the Over-drive */ + __HAL_PWR_OVERDRIVE_DISABLE(); + + /* Get tick */ + tickstart = HAL_GetTick(); + + while(__HAL_PWR_GET_FLAG(PWR_FLAG_ODRDY)) + { + if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + return HAL_OK; +} + +/** + * @brief Enters in Under-Drive STOP mode. + * + * @note This mode is only available for STM32F42xxx/STM324F3xxx/STM32F446xx/STM32F469xx/STM32F479xx devices. + * + * @note This mode can be selected only when the Under-Drive is already active + * + * @note This mode is enabled only with STOP low power mode. + * In this mode, the 1.2V domain is preserved in reduced leakage mode. This + * mode is only available when the main regulator or the low power regulator + * is in low voltage mode + * + * @note If the Under-drive mode was enabled, it is automatically disabled after + * exiting Stop mode. + * When the voltage regulator operates in Under-drive mode, an additional + * startup delay is induced when waking up from Stop mode. + * + * @note In Stop mode, all I/O pins keep the same state as in Run mode. + * + * @note When exiting Stop mode by issuing an interrupt or a wake-up event, + * the HSI RC oscillator is selected as system clock. + * + * @note When the voltage regulator operates in low power mode, an additional + * startup delay is incurred when waking up from Stop mode. + * By keeping the internal regulator ON during Stop mode, the consumption + * is higher although the startup time is reduced. + * + * @param Regulator: specifies the regulator state in STOP mode. + * This parameter can be one of the following values: + * @arg PWR_MAINREGULATOR_UNDERDRIVE_ON: Main Regulator in under-drive mode + * and Flash memory in power-down when the device is in Stop under-drive mode + * @arg PWR_LOWPOWERREGULATOR_UNDERDRIVE_ON: Low Power Regulator in under-drive mode + * and Flash memory in power-down when the device is in Stop under-drive mode + * @param STOPEntry: specifies if STOP mode in entered with WFI or WFE instruction. + * This parameter can be one of the following values: + * @arg PWR_SLEEPENTRY_WFI: enter STOP mode with WFI instruction + * @arg PWR_SLEEPENTRY_WFE: enter STOP mode with WFE instruction + * @retval None + */ +HAL_StatusTypeDef HAL_PWREx_EnterUnderDriveSTOPMode(uint32_t Regulator, uint8_t STOPEntry) +{ + uint32_t tmpreg1 = 0; + uint32_t tickstart = 0; + + /* Check the parameters */ + assert_param(IS_PWR_REGULATOR_UNDERDRIVE(Regulator)); + assert_param(IS_PWR_STOP_ENTRY(STOPEntry)); + + /* Enable Power ctrl clock */ + __HAL_RCC_PWR_CLK_ENABLE(); + /* Enable the Under-drive Mode ---------------------------------------------*/ + /* Clear Under-drive flag */ + __HAL_PWR_CLEAR_ODRUDR_FLAG(); + + /* Enable the Under-drive */ + __HAL_PWR_UNDERDRIVE_ENABLE(); + + /* Get tick */ + tickstart = HAL_GetTick(); + + /* Wait for UnderDrive mode is ready */ + while(__HAL_PWR_GET_FLAG(PWR_FLAG_UDRDY)) + { + if((HAL_GetTick() - tickstart ) > PWR_UDERDRIVE_TIMEOUT_VALUE) + { + return HAL_TIMEOUT; + } + } + + /* Select the regulator state in STOP mode ---------------------------------*/ + tmpreg1 = PWR->CR; + /* Clear PDDS, LPDS, MRLUDS and LPLUDS bits */ + tmpreg1 &= (uint32_t)~(PWR_CR_PDDS | PWR_CR_LPDS | PWR_CR_LPUDS | PWR_CR_MRUDS); + + /* Set LPDS, MRLUDS and LPLUDS bits according to PWR_Regulator value */ + tmpreg1 |= Regulator; + + /* Store the new value */ + PWR->CR = tmpreg1; + + /* Set SLEEPDEEP bit of Cortex System Control Register */ + SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; + + /* Select STOP mode entry --------------------------------------------------*/ + if(STOPEntry == PWR_SLEEPENTRY_WFI) + { + /* Request Wait For Interrupt */ + __WFI(); + } + else + { + /* Request Wait For Event */ + __WFE(); + } + /* Reset SLEEPDEEP bit of Cortex System Control Register */ + SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk); + + return HAL_OK; +} + +#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx || STM32F469xx || STM32F479xx */ +/** + * @} + */ + +/** + * @} + */ + +#endif /* HAL_PWR_MODULE_ENABLED */ +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |