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Diffstat (limited to 'simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr.c')
| -rw-r--r-- | simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr.c | 733 |
1 files changed, 733 insertions, 0 deletions
diff --git a/simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr.c b/simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr.c new file mode 100644 index 0000000..c3564bc --- /dev/null +++ b/simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_pwr.c @@ -0,0 +1,733 @@ +/**
+ ******************************************************************************
+ * @file stm32l0xx_hal_pwr.c
+ * @author MCD Application Team
+ * @brief PWR HAL module driver.
+ *
+ * This file provides firmware functions to manage the following
+ * functionalities of the Power Controller (PWR) peripheral:
+ * + Initialization/de-initialization functions
+ * + Peripheral Control functions
+ *
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© Copyright(c) 2016 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l0xx_hal.h"
+
+#ifdef HAL_PWR_MODULE_ENABLED
+/** @addtogroup STM32L0xx_HAL_Driver
+ * @{
+ */
+
+/** @addtogroup PWR
+ * @{
+ */
+
+/** @addtogroup PWR_Private
+ * @{
+ */
+
+#if defined(PWR_PVD_SUPPORT)
+/** @defgroup PWR_PVD_Mode_Mask PWR PVD Mode Mask
+ * @{
+ */
+#define PVD_MODE_IT (0x00010000U)
+#define PVD_MODE_EVT (0x00020000U)
+#define PVD_RISING_EDGE (0x00000001U)
+#define PVD_FALLING_EDGE (0x00000002U)
+/**
+ * @}
+ */
+#endif
+
+/**
+ * @}
+ */
+
+
+/** @addtogroup PWR_Exported_Functions
+ * @{
+ */
+
+/** @addtogroup PWR_Exported_Functions_Group1
+ * @brief Initialization and de-initialization functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Initialization and de-initialization functions #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Deinitializes the HAL PWR peripheral registers to their default reset values.
+ * @retval None
+ */
+void HAL_PWR_DeInit(void)
+{
+ __HAL_RCC_PWR_FORCE_RESET();
+ __HAL_RCC_PWR_RELEASE_RESET();
+}
+
+/**
+ * @}
+ */
+
+/** @addtogroup PWR_Exported_Functions_Group2
+ * @brief Low Power modes configuration functions
+ *
+@verbatim
+
+ ===============================================================================
+ ##### Peripheral Control functions #####
+ ===============================================================================
+
+ *** Backup domain ***
+ =========================
+ [..]
+ After reset, the backup domain (RTC registers, RTC backup data
+ registers) is protected against possible unwanted
+ write accesses.
+ To enable access to the RTC Domain and RTC registers, proceed as follows:
+ (+) Enable the Power Controller (PWR) APB1 interface clock using the
+ __HAL_RCC_PWR_CLK_ENABLE() macro.
+ (+) Enable access to RTC domain using the HAL_PWR_EnableBkUpAccess() function.
+
+ *** PVD configuration ***
+ =========================
+ [..]
+ (+) The PVD is used to monitor the VDD power supply by comparing it to a
+ threshold selected by the PVD Level (PLS[2:0] bits in the PWR_CR).
+ (+) The PVD can use an external input analog voltage (PVD_IN) which is compared
+ internally to VREFINT. The PVD_IN (PB7) has to be configured in Analog mode
+ when PWR_PVDLevel_7 is selected (PLS[2:0] = 111).
+
+ (+) A PVDO flag is available to indicate if VDD/VDDA is higher or lower
+ than the PVD threshold. This event is internally connected to the EXTI
+ line16 and can generate an interrupt if enabled. This is done through
+ __HAL_PWR_PVD_EXTI_ENABLE_IT() macro.
+ (+) The PVD is stopped in Standby mode.
+ (+) The PVD feature is not supported on L0 Value line.
+
+ *** WakeUp pin configuration ***
+ ================================
+ [..]
+ (+) WakeUp pin is used to wake up the system from Standby mode. This pin is
+ forced in input pull-down configuration and is active on rising edges.
+ (+) There are two WakeUp pins:
+ WakeUp Pin 1 on PA.00.
+ WakeUp Pin 2 on PC.13.
+ WakeUp Pin 3 on PE.06 .
+
+
+ [..]
+ *** Main and Backup Regulators configuration ***
+ ================================================
+
+ (+) 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_VOLTAGESCALING_CONFIG()
+ macro which configures the two VOS bits in PWR_CR register:
+ (++) PWR_REGULATOR_VOLTAGE_SCALE1 (VOS bits = 01), the regulator voltage output Scale 1 mode selected and
+ the System frequency can go up to 32 MHz.
+ (++) PWR_REGULATOR_VOLTAGE_SCALE2 (VOS bits = 10), the regulator voltage output Scale 2 mode selected and
+ the System frequency can go up to 16 MHz.
+ (++) PWR_REGULATOR_VOLTAGE_SCALE3 (VOS bits = 11), the regulator voltage output Scale 3 mode selected and
+ the System frequency can go up to 4.2 MHz.
+
+ Refer to the datasheets for more details.
+
+ *** Low Power modes configuration ***
+ =====================================
+ [..]
+ The device features 5 low-power modes:
+ (+) Low power run mode: regulator in low power mode, limited clock frequency,
+ limited number of peripherals running.
+ (+) Sleep mode: Cortex-M0+ core stopped, peripherals kept running.
+ (+) Low power sleep mode: Cortex-M0+ core stopped, limited clock frequency,
+ limited number of peripherals running, regulator in low power mode.
+ (+) Stop mode: All clocks are stopped, regulator running, regulator in low power mode.
+ (+) Standby mode: VCORE domain powered off
+
+ *** Low power run mode ***
+ =========================
+ [..]
+ To further reduce the consumption when the system is in Run mode, the regulator can be
+ configured in low power mode. In this mode, the system frequency should not exceed
+ MSI frequency range1.
+ In Low power run mode, all I/O pins keep the same state as in Run mode.
+
+ (+) Entry:
+ (++) VCORE in range2
+ (++) Decrease the system frequency not to exceed the frequency of MSI frequency range1.
+ (++) The regulator is forced in low power mode using the HAL_PWREx_EnableLowPowerRunMode()
+ function.
+ (+) Exit:
+ (++) The regulator is forced in Main regulator mode using the HAL_PWREx_DisableLowPowerRunMode()
+ function.
+ (++) Increase the system frequency if needed.
+
+ *** Sleep mode ***
+ ==================
+ [..]
+ (+) Entry:
+ The Sleep mode is entered by using the HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFx)
+ functions with
+ (++) PWR_SLEEPENTRY_WFI: enter SLEEP mode with WFI instruction
+ (++) PWR_SLEEPENTRY_WFE: enter SLEEP mode with WFE instruction
+
+ (+) Exit:
+ (++) Any peripheral interrupt acknowledged by the nested vectored interrupt
+ controller (NVIC) can wake up the device from Sleep mode. If the WFE instruction was used to enter sleep mode,
+ the MCU exits Sleep mode as soon as an event occurs.
+
+ *** Low power sleep mode ***
+ ============================
+ [..]
+ (+) Entry:
+ The Low power sleep mode is entered by using the HAL_PWR_EnterSLEEPMode(PWR_LOWPOWERREGULATOR_ON, PWR_SLEEPENTRY_WFx)
+ functions with
+ (++) PWR_SLEEPENTRY_WFI: enter SLEEP mode with WFI instruction
+ (++) PWR_SLEEPENTRY_WFE: enter SLEEP mode with WFE instruction
+ (+) The Flash memory can be switched off by using the control bits (SLEEP_PD in the FLASH_ACR register.
+ This reduces power consumption but increases the wake-up time.
+
+ (+) Exit:
+ (++) If the WFI instruction was used to enter Low power sleep mode, any peripheral interrupt
+ acknowledged by the nested vectored interrupt controller (NVIC) can wake up the device
+ from Low power sleep mode. If the WFE instruction was used to enter Low power sleep mode,
+ the MCU exits Sleep mode as soon as an event occurs.
+
+ *** Stop mode ***
+ =================
+ [..]
+ The Stop mode is based on the Cortex-M0+ deepsleep mode combined with peripheral
+ clock gating. The voltage regulator can be configured either in normal or low-power mode.
+ In Stop mode, all clocks in the VCORE domain are stopped, the PLL, the MSI, the HSI and
+ the HSE RC oscillators are disabled. Internal SRAM and register contents are preserved.
+ To get the lowest consumption in Stop mode, the internal Flash memory also enters low
+ power mode. When the Flash memory is in power-down mode, an additional startup delay is
+ incurred when waking up from Stop mode.
+ To minimize the consumption In Stop mode, VREFINT, the BOR, PVD, and temperature
+ sensor can be switched off before entering Stop mode. They can be switched on again by
+ software after exiting Stop mode using the ULP bit in the PWR_CR register.
+ In Stop mode, all I/O pins keep the same state as in Run mode.
+
+ (+) Entry:
+ The Stop mode is entered using the HAL_PWR_EnterSTOPMode
+ function with:
+ (++) Main regulator ON.
+ (++) Low Power regulator ON.
+ (++) PWR_SLEEPENTRY_WFI: enter SLEEP mode with WFI instruction
+ (++) PWR_SLEEPENTRY_WFE: enter SLEEP mode with WFE instruction
+ (+) Exit:
+ (++) By issuing an interrupt or a wakeup event, the MSI or HSI16 RC
+ oscillator is selected as system clock depending the bit STOPWUCK in the RCC_CFGR
+ register
+
+ *** Standby mode ***
+ ====================
+ [..]
+ The Standby mode allows to achieve the lowest power consumption. It is based on the
+ Cortex-M0+ deepsleep mode, with the voltage regulator disabled. The VCORE domain is
+ consequently powered off. The PLL, the MSI, the HSI oscillator and the HSE oscillator are
+ also switched off. SRAM and register contents are lost except for the RTC registers, RTC
+ backup registers and Standby circuitry.
+
+ To minimize the consumption In Standby mode, VREFINT, the BOR, PVD, and temperature
+ sensor can be switched off before entering the Standby mode. They can be switched
+ on again by software after exiting the Standby mode.
+ function.
+
+ (+) Entry:
+ (++) The Standby mode is entered using the HAL_PWR_EnterSTANDBYMode() function.
+ (+) Exit:
+ (++) WKUP pin rising edge, RTC alarm (Alarm A and Alarm B), RTC wakeup,
+ tamper event, time-stamp event, external reset in NRST pin, IWDG reset.
+
+ *** Auto-wakeup (AWU) from low-power mode ***
+ =============================================
+ [..]
+ The MCU can be woken up from low-power mode by an RTC Alarm event, an RTC
+ Wakeup event, a tamper event, a time-stamp event, or a comparator event,
+ without depending on an external interrupt (Auto-wakeup mode).
+
+ (+) RTC auto-wakeup (AWU) from the Stop mode
+ (++) To wake up from the Stop mode with an RTC alarm event, it is necessary to:
+ (+++) Configure the EXTI Line 17 to be sensitive to rising edges (Interrupt
+ or Event modes) using the EXTI_Init() function.
+ (+++) Enable the RTC Alarm Interrupt using the RTC_ITConfig() function
+ (+++) Configure the RTC to generate the RTC alarm using the RTC_SetAlarm()
+ and RTC_AlarmCmd() functions.
+ (++) To wake up from the Stop mode with an RTC Tamper or time stamp event, it
+ is necessary to:
+ (+++) Configure the EXTI Line 19 to be sensitive to rising edges (Interrupt
+ or Event modes) using the EXTI_Init() function.
+ (+++) Enable the RTC Tamper or time stamp Interrupt using the RTC_ITConfig()
+ function.
+ (+++) Configure the RTC to detect the tamper or time stamp event using the
+ RTC_TimeStampConfig(), RTC_TamperTriggerConfig() and RTC_TamperCmd()
+ functions.
+ (++) To wake up from the Stop mode with an RTC WakeUp event, it is necessary to:
+ (+++) Configure the EXTI Line 20 to be sensitive to rising edges (Interrupt
+ or Event modes) using the EXTI_Init() function.
+ (+++) Enable the RTC WakeUp Interrupt using the RTC_ITConfig() function.
+ (+++) Configure the RTC to generate the RTC WakeUp event using the RTC_WakeUpClockConfig(),
+ RTC_SetWakeUpCounter() and RTC_WakeUpCmd() functions.
+
+ (+) RTC auto-wakeup (AWU) from the Standby mode
+ (++) To wake up from the Standby mode with an RTC alarm event, it is necessary to:
+ (+++) Enable the RTC Alarm Interrupt using the RTC_ITConfig() function.
+ (+++) Configure the RTC to generate the RTC alarm using the RTC_SetAlarm()
+ and RTC_AlarmCmd() functions.
+ (++) To wake up from the Standby mode with an RTC Tamper or time stamp event, it
+ is necessary to:
+ (+++) Enable the RTC Tamper or time stamp Interrupt using the RTC_ITConfig()
+ function.
+ (+++) Configure the RTC to detect the tamper or time stamp event using the
+ RTC_TimeStampConfig(), RTC_TamperTriggerConfig() and RTC_TamperCmd()
+ functions.
+ (++) To wake up from the Standby mode with an RTC WakeUp event, it is necessary to:
+ (+++) Enable the RTC WakeUp Interrupt using the RTC_ITConfig() function
+ (+++) Configure the RTC to generate the RTC WakeUp event using the RTC_WakeUpClockConfig(),
+ RTC_SetWakeUpCounter() and RTC_WakeUpCmd() functions.
+
+ (+) Comparator auto-wakeup (AWU) from the Stop mode
+ (++) To wake up from the Stop mode with an comparator 1 or comparator 2 wakeup
+ event, it is necessary to:
+ (+++) Configure the EXTI Line 21 for comparator 1 or EXTI Line 22 for comparator 2
+ to be sensitive to to the selected edges (falling, rising or falling
+ and rising) (Interrupt or Event modes) using the EXTI_Init() function.
+ (+++) Configure the comparator to generate the event.
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Enables access to the backup domain (RTC registers, RTC
+ * backup data registers ).
+ * @note If the HSE divided by 2, 4, 8 or 16 is used as the RTC clock, the
+ * Backup Domain Access should be kept enabled.
+ * @retval None
+ */
+void HAL_PWR_EnableBkUpAccess(void)
+{
+ /* Enable access to RTC and backup registers */
+ SET_BIT(PWR->CR, PWR_CR_DBP);
+}
+
+/**
+ * @brief Disables access to the backup domain
+ * @note Applies to RTC registers, RTC backup data registers.
+ * @note If the HSE divided by 2, 4, 8 or 16 is used as the RTC clock, the
+ * Backup Domain Access should be kept enabled.
+ * @retval None
+ */
+void HAL_PWR_DisableBkUpAccess(void)
+{
+ /* Disable access to RTC and backup registers */
+ CLEAR_BIT(PWR->CR, PWR_CR_DBP);
+}
+
+#if defined(PWR_PVD_SUPPORT)
+/**
+ * @brief Configures the voltage threshold detected by the Power Voltage Detector(PVD).
+ * @param sConfigPVD pointer to an PWR_PVDTypeDef structure that contains the configuration
+ * information for the PVD.
+ * @note Refer to the electrical characteristics of your device datasheet for
+ * more details about the voltage threshold corresponding to each
+ * detection level.
+ * @retval None
+ */
+void HAL_PWR_ConfigPVD(PWR_PVDTypeDef *sConfigPVD)
+{
+ /* Check the parameters */
+ assert_param(IS_PWR_PVD_LEVEL(sConfigPVD->PVDLevel));
+ assert_param(IS_PWR_PVD_MODE(sConfigPVD->Mode));
+
+ /* Set PLS[7:5] bits according to PVDLevel value */
+ MODIFY_REG(PWR->CR, PWR_CR_PLS, sConfigPVD->PVDLevel);
+
+ /* Clear any previous config. Keep it clear if no event or IT mode is selected */
+ __HAL_PWR_PVD_EXTI_DISABLE_EVENT();
+ __HAL_PWR_PVD_EXTI_DISABLE_IT();
+ __HAL_PWR_PVD_EXTI_DISABLE_FALLING_EDGE();
+ __HAL_PWR_PVD_EXTI_DISABLE_RISING_EDGE();
+
+ /* Configure interrupt mode */
+ if((sConfigPVD->Mode & PVD_MODE_IT) == PVD_MODE_IT)
+ {
+ __HAL_PWR_PVD_EXTI_ENABLE_IT();
+ }
+
+ /* Configure event mode */
+ if((sConfigPVD->Mode & PVD_MODE_EVT) == PVD_MODE_EVT)
+ {
+ __HAL_PWR_PVD_EXTI_ENABLE_EVENT();
+ }
+
+ /* Configure the edge */
+ if((sConfigPVD->Mode & PVD_RISING_EDGE) == PVD_RISING_EDGE)
+ {
+ __HAL_PWR_PVD_EXTI_ENABLE_RISING_EDGE();
+ }
+
+ if((sConfigPVD->Mode & PVD_FALLING_EDGE) == PVD_FALLING_EDGE)
+ {
+ __HAL_PWR_PVD_EXTI_ENABLE_FALLING_EDGE();
+ }
+}
+
+/**
+ * @brief Enables the Power Voltage Detector(PVD).
+ * @retval None
+ */
+void HAL_PWR_EnablePVD(void)
+{
+ /* Enable the power voltage detector */
+ SET_BIT(PWR->CR, PWR_CR_PVDE);
+}
+
+/**
+ * @brief Disables the Power Voltage Detector(PVD).
+ * @retval None
+ */
+void HAL_PWR_DisablePVD(void)
+{
+ /* Disable the power voltage detector */
+ CLEAR_BIT(PWR->CR, PWR_CR_PVDE);
+}
+#endif /* PWR_PVD_SUPPORT */
+
+/**
+ * @brief Enables the WakeUp PINx functionality.
+ * @param WakeUpPinx: Specifies the Power Wake-Up pin to enable.
+ * This parameter can be one of the following values:
+ * @arg PWR_WAKEUP_PIN1
+ * @arg PWR_WAKEUP_PIN2
+ * @arg PWR_WAKEUP_PIN3 for stm32l07xxx and stm32l08xxx devices only.
+ * @retval None
+ */
+void HAL_PWR_EnableWakeUpPin(uint32_t WakeUpPinx)
+{
+ /* Check the parameter */
+ assert_param(IS_PWR_WAKEUP_PIN(WakeUpPinx));
+ /* Enable the EWUPx pin */
+ SET_BIT(PWR->CSR, WakeUpPinx);
+}
+
+/**
+ * @brief Disables the WakeUp PINx functionality.
+ * @param WakeUpPinx: Specifies the Power Wake-Up pin to disable.
+ * This parameter can be one of the following values:
+ * @arg PWR_WAKEUP_PIN1
+ * @arg PWR_WAKEUP_PIN2
+ * @arg PWR_WAKEUP_PIN3 for stm32l07xxx and stm32l08xxx devices only.
+ * @retval None
+ */
+void HAL_PWR_DisableWakeUpPin(uint32_t WakeUpPinx)
+{
+ /* Check the parameter */
+ assert_param(IS_PWR_WAKEUP_PIN(WakeUpPinx));
+ /* Disable the EWUPx pin */
+ CLEAR_BIT(PWR->CSR, WakeUpPinx);
+}
+
+/**
+ * @brief Enters Sleep mode.
+ * @note In Sleep mode, all I/O pins keep the same state as in Run mode.
+ * @param Regulator: Specifies the regulator state in SLEEP mode.
+ * This parameter can be one of the following values:
+ * @arg PWR_MAINREGULATOR_ON: SLEEP mode with regulator ON
+ * @arg PWR_LOWPOWERREGULATOR_ON: SLEEP mode with low power regulator ON
+ * @param SLEEPEntry: Specifies if SLEEP mode is entered with WFI or WFE instruction.
+ * When WFI entry is used, tick interrupt have to be disabled if not desired as
+ * the interrupt wake up source.
+ * This parameter can be one of the following values:
+ * @arg PWR_SLEEPENTRY_WFI: enter SLEEP mode with WFI instruction
+ * @arg PWR_SLEEPENTRY_WFE: enter SLEEP mode with WFE instruction
+ * @retval None
+ */
+void HAL_PWR_EnterSLEEPMode(uint32_t Regulator, uint8_t SLEEPEntry)
+{
+ uint32_t tmpreg = 0U;
+ uint32_t ulpbit, vrefinbit;
+
+ /* Check the parameters */
+ assert_param(IS_PWR_REGULATOR(Regulator));
+ assert_param(IS_PWR_SLEEP_ENTRY(SLEEPEntry));
+
+ /* It is forbidden to configure both EN_VREFINT=1 and ULP=1 if the device is
+ in Stop mode or in Sleep/Low-power sleep mode */
+ ulpbit = READ_BIT(PWR->CR, PWR_CR_ULP);
+ vrefinbit = READ_BIT(SYSCFG->CFGR3, SYSCFG_CFGR3_EN_VREFINT);
+ if((ulpbit != 0) && (vrefinbit != 0))
+ {
+ CLEAR_BIT(PWR->CR, PWR_CR_ULP);
+ }
+
+ /* Select the regulator state in Sleep mode ---------------------------------*/
+ tmpreg = PWR->CR;
+
+ /* Clear PDDS and LPDS bits */
+ CLEAR_BIT(tmpreg, (PWR_CR_PDDS | PWR_CR_LPSDSR));
+
+ /* Set LPSDSR bit according to PWR_Regulator value */
+ SET_BIT(tmpreg, Regulator);
+
+ /* Store the new value */
+ PWR->CR = tmpreg;
+
+ /* Clear SLEEPDEEP bit of Cortex System Control Register */
+ CLEAR_BIT(SCB->SCR, SCB_SCR_SLEEPDEEP_Msk);
+
+ /* Select SLEEP mode entry -------------------------------------------------*/
+ if(SLEEPEntry == PWR_SLEEPENTRY_WFI)
+ {
+ /* Request Wait For Interrupt */
+ __WFI();
+ }
+ else
+ {
+ /* Request Wait For Event */
+ __SEV();
+ __WFE();
+ __WFE();
+ }
+
+ if((ulpbit != 0) && (vrefinbit != 0))
+ {
+ SET_BIT(PWR->CR, PWR_CR_ULP);
+ }
+
+ /* Additional NOP to ensure all pending instructions are flushed before entering low power mode */
+ __NOP();
+
+}
+
+/**
+ * @brief Enters 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 wakeup event,
+ * MSI or HSI16 RCoscillator is selected as system clock depending
+ * the bit STOPWUCK in the RCC_CFGR register.
+ * @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.
+ * @note Before entering in this function, it is important to ensure that the WUF
+ * wakeup flag is cleared. To perform this action, it is possible to call the
+ * following macro : __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU)
+ *
+ * @param Regulator: Specifies the regulator state in Stop mode.
+ * This parameter can be one of the following values:
+ * @arg PWR_MAINREGULATOR_ON: Stop mode with regulator ON
+ * @arg PWR_LOWPOWERREGULATOR_ON: Stop mode with low power regulator ON
+ * @param STOPEntry: Specifies if Stop mode in entered with WFI or WFE instruction.
+ * This parameter can be one of the following values:
+ * @arg PWR_STOPENTRY_WFI: Enter Stop mode with WFI instruction
+ * @arg PWR_STOPENTRY_WFE: Enter Stop mode with WFE instruction
+ * @retval None
+ */
+void HAL_PWR_EnterSTOPMode(uint32_t Regulator, uint8_t STOPEntry)
+{
+ uint32_t tmpreg = 0U;
+ uint32_t ulpbit, vrefinbit;
+
+ /* Check the parameters */
+ assert_param(IS_PWR_REGULATOR(Regulator));
+ assert_param(IS_PWR_STOP_ENTRY(STOPEntry));
+
+ /* It is forbidden to configure both EN_VREFINT=1 and ULP=1 if the device is
+ in Stop mode or in Sleep/Low-power sleep mode */
+ ulpbit = READ_BIT(PWR->CR, PWR_CR_ULP);
+ vrefinbit = READ_BIT(SYSCFG->CFGR3, SYSCFG_CFGR3_EN_VREFINT);
+ if((ulpbit != 0) && (vrefinbit != 0))
+ {
+ CLEAR_BIT(PWR->CR, PWR_CR_ULP);
+ }
+
+ /* Select the regulator state in Stop mode ---------------------------------*/
+ tmpreg = PWR->CR;
+
+ /* Clear PDDS and LPDS bits */
+ CLEAR_BIT(tmpreg, (PWR_CR_PDDS | PWR_CR_LPSDSR));
+
+ /* Set LPSDSR bit according to PWR_Regulator value */
+ SET_BIT(tmpreg, Regulator);
+
+ /* Store the new value */
+ PWR->CR = tmpreg;
+
+ /* Set SLEEPDEEP bit of Cortex System Control Register */
+ SET_BIT(SCB->SCR, SCB_SCR_SLEEPDEEP_Msk);
+
+ /* Select Stop mode entry --------------------------------------------------*/
+ if(STOPEntry == PWR_STOPENTRY_WFI)
+ {
+ /* Request Wait For Interrupt */
+ __WFI();
+ }
+ else
+ {
+ /* Request Wait For Event */
+ __SEV();
+ __WFE();
+ __WFE();
+ }
+
+ /* Reset SLEEPDEEP bit of Cortex System Control Register */
+ CLEAR_BIT(SCB->SCR, SCB_SCR_SLEEPDEEP_Msk);
+
+ if((ulpbit != 0) && (vrefinbit != 0))
+ {
+ SET_BIT(PWR->CR, PWR_CR_ULP);
+ }
+}
+
+/**
+ * @brief Enters Standby mode.
+ * @note In Standby mode, all I/O pins are high impedance except for:
+ * - Reset pad (still available)
+ * - RTC_AF1 pin (PC13) if configured for tamper, time-stamp, RTC
+ * Alarm out, or RTC clock calibration out.
+ * - RTC_AF2 pin (PC13) if configured for tamper.
+ * - WKUP pin 1 (PA00) if enabled.
+ * - WKUP pin 2 (PC13) if enabled.
+ * - WKUP pin 3 (PE06) if enabled, for stm32l07xxx and stm32l08xxx devices only.
+ * - WKUP pin 3 (PA02) if enabled, for stm32l031xx devices only.
+ * @retval None
+ */
+void HAL_PWR_EnterSTANDBYMode(void)
+{
+ /* Select Standby mode */
+ SET_BIT(PWR->CR, PWR_CR_PDDS);
+
+ /* Set SLEEPDEEP bit of Cortex System Control Register */
+ SET_BIT(SCB->SCR, SCB_SCR_SLEEPDEEP_Msk);
+
+ /* This option is used to ensure that store operations are completed */
+#if defined ( __CC_ARM)
+ __force_stores();
+#endif
+ /* Request Wait For Interrupt */
+ __WFI();
+}
+
+/**
+ * @brief Indicates Sleep-On-Exit when returning from Handler mode to Thread mode.
+ * @note Set SLEEPONEXIT bit of SCR register. When this bit is set, the processor
+ * re-enters SLEEP mode when an interruption handling is over.
+ * Setting this bit is useful when the processor is expected to run only on
+ * interruptions handling.
+ * @retval None
+ */
+void HAL_PWR_EnableSleepOnExit(void)
+{
+ /* Set SLEEPONEXIT bit of Cortex System Control Register */
+ SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPONEXIT_Msk));
+}
+
+
+/**
+ * @brief Disables Sleep-On-Exit feature when returning from Handler mode to Thread mode.
+ * @note Clears SLEEPONEXIT bit of SCR register. When this bit is set, the processor
+ * re-enters SLEEP mode when an interruption handling is over.
+ * @retval None
+ */
+void HAL_PWR_DisableSleepOnExit(void)
+{
+ /* Clear SLEEPONEXIT bit of Cortex System Control Register */
+ CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPONEXIT_Msk));
+}
+
+
+/**
+ * @brief Enables CORTEX M0+ SEVONPEND bit.
+ * @note Sets SEVONPEND bit of SCR register. When this bit is set, this causes
+ * WFE to wake up when an interrupt moves from inactive to pended.
+ * @retval None
+ */
+void HAL_PWR_EnableSEVOnPend(void)
+{
+ /* Set SEVONPEND bit of Cortex System Control Register */
+ SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SEVONPEND_Msk));
+}
+
+
+/**
+ * @brief Disables CORTEX M0+ SEVONPEND bit.
+ * @note Clears SEVONPEND bit of SCR register. When this bit is set, this causes
+ * WFE to wake up when an interrupt moves from inactive to pended.
+ * @retval None
+ */
+void HAL_PWR_DisableSEVOnPend(void)
+{
+ /* Clear SEVONPEND bit of Cortex System Control Register */
+ CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SEVONPEND_Msk));
+}
+
+#if defined(PWR_PVD_SUPPORT)
+/**
+ * @brief This function handles the PWR PVD interrupt request.
+ * @note This API should be called under the PVD_IRQHandler().
+ * @retval None
+ */
+void HAL_PWR_PVD_IRQHandler(void)
+{
+ /* Check PWR exti flag */
+ if(__HAL_PWR_PVD_EXTI_GET_FLAG() != RESET)
+ {
+ /* PWR PVD interrupt user callback */
+ HAL_PWR_PVDCallback();
+
+ /* Clear PWR Exti pending bit */
+ __HAL_PWR_PVD_EXTI_CLEAR_FLAG();
+ }
+}
+
+/**
+ * @brief PWR PVD interrupt callback
+ * @retval None
+ */
+__weak void HAL_PWR_PVDCallback(void)
+{
+ /* NOTE : This function Should not be modified, when the callback is needed,
+ the HAL_PWR_PVDCallback could be implemented in the user file
+ */
+}
+#endif /* PWR_PVD_SUPPORT */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* HAL_PWR_MODULE_ENABLED */
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+
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