/**
* @brief Enter Sleep or Low-power Sleep mode.
* @note In Sleep/Low-power Sleep mode, all I/O pins keep the same state as in Run mode.
* @param Regulator: Specifies the regulator state in Sleep/Low-power Sleep mode.
* This parameter can be one of the following values:
* @arg PWR_MAINREGULATOR_ON: Sleep mode (regulator in main mode)
* @arg PWR_LOWPOWERREGULATOR_ON: Low-power Sleep mode (regulator in low-power mode)
* @note Low-power Sleep mode is entered from Low-power Run mode. Therefore, if not yet
* in Low-power Run mode before calling HAL_PWR_EnterSLEEPMode() with Regulator set
* to PWR_LOWPOWERREGULATOR_ON, the user can optionally configure the
* Flash in power-down monde in setting the SLEEP_PD bit in FLASH_ACR register.
* Additionally, the clock frequency must be reduced below 2 MHz.
* Setting SLEEP_PD in FLASH_ACR then appropriately reducing the clock frequency must
* be done before calling HAL_PWR_EnterSLEEPMode() API.
* @note When exiting Low-power Sleep mode, the MCU is in Low-power Run mode. To move in
* Run mode, the user must resort to HAL_PWREx_DisableLowPowerRunMode() API.
* @param SLEEPEntry: Specifies if Sleep mode is entered with WFI or WFE instruction.
* This parameter can be one of the following values:
* @arg PWR_SLEEPENTRY_WFI: enter Sleep or Low-power Sleep mode with WFI instruction
* @arg PWR_SLEEPENTRY_WFE: enter Sleep or Low-power Sleep mode with WFE instruction
* @note When WFI entry is used, tick interrupt have to be disabled if not desired as
* the interrupt wake up source.
* @retval None
*/
void HAL_PWR_EnterSLEEPMode(uint32_t Regulator, uint8_t SLEEPEntry)
{
/* Check the parameters */
assert_param(IS_PWR_REGULATOR(Regulator));
assert_param(IS_PWR_SLEEP_ENTRY(SLEEPEntry));
/* Set Regulator parameter */
if (Regulator == PWR_MAINREGULATOR_ON)
{
/* If in low-power run mode at this point, exit it */
if (HAL_IS_BIT_SET(PWR->SR2, PWR_SR2_REGLPF))
{
HAL_PWREx_DisableLowPowerRunMode();
}
/* Regulator now in main mode. */
}
else
{
/* If in run mode, first move to low-power run mode.
The system clock frequency must be below 2 MHz at this point. */
if (HAL_IS_BIT_SET(PWR->SR2, PWR_SR2_REGLPF) == RESET)
{
HAL_PWREx_EnableLowPowerRunMode();
}
}
/* Clear SLEEPDEEP bit of Cortex System Control Register */
CLEAR_BIT(SCB->SCR, ((uint32_t)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();
}
}
/**
* @brief Enters Sleep mode.
* @note In Sleep mode, all I/O pins keep the same state as in Run mode.
* @param PWR_SLEEPEntry: specifies if SLEEP mode in entered with WFI or WFE instruction.
* 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 PWR_EnterSleepMode(uint8_t PWR_SLEEPEntry)
{
/* Check the parameters */
assert_param(IS_PWR_SLEEP_ENTRY(PWR_SLEEPEntry));
/* Clear SLEEPDEEP bit of Cortex-M0 System Control Register */
SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
/* Select SLEEP mode entry -------------------------------------------------*/
if(PWR_SLEEPEntry == PWR_SLEEPEntry_WFI)
{
/* Request Wait For Interrupt */
__WFI();
}
else
{
/* Request Wait For Event */
__WFE();
}
}
/**
* @brief Enters Sleep mode.
*
* @note In Sleep mode, all I/O pins keep the same state as in Run mode.
*
* @note In Sleep mode, the systick is stopped to avoid exit from this mode with
* systick interrupt when used as time base for Timeout
*
* @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
* @note This parameter is not used for the STM32F4 family and is kept as parameter
* just to maintain compatibility with the lower power families.
* @param SLEEPEntry: Specifies if SLEEP mode in entered with WFI or WFE instruction.
* 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)
{
/* Check the parameters */
assert_param(IS_PWR_REGULATOR(Regulator));
assert_param(IS_PWR_SLEEP_ENTRY(SLEEPEntry));
/* Select SLEEP mode entry -------------------------------------------------*/
if(SLEEPEntry == PWR_SLEEPENTRY_WFI)
{
/* Request Wait For Interrupt */
__WFI();
}
else
{
/* Request Wait For Event */
__SEV();
__WFE();
__WFE();
}
}
/**
* @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 = 0;
/* Check the parameters */
assert_param(IS_PWR_REGULATOR(Regulator));
assert_param(IS_PWR_SLEEP_ENTRY(SLEEPEntry));
/* Select the regulator state in SLEEP mode ---------------------------------*/
tmpreg = PWR->CR;
/* Clear PDDS and LPDS bits */
tmpreg &= (uint32_t)~(PWR_CR_PDDS | PWR_CR_LPDS);
/* Set LPDS bit according to Regulator value */
tmpreg |= Regulator;
/* Store the new value */
PWR->CR = tmpreg;
/* Clear SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR &= (uint32_t)~((uint32_t)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();
}
}
/**
* @brief Enters Sleep mode.
*
* @note In Sleep mode, all I/O pins keep the same state as in Run mode.
*
* @note In Sleep mode, the systick is stopped to avoid exit from this mode with
* systick interrupt when used as time base for Timeout
*
* @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
* @note This parameter is not used for the STM32F7 family and is kept as parameter
* just to maintain compatibility with the lower power families.
* @param SLEEPEntry: Specifies if SLEEP mode in entered with WFI or WFE instruction.
* 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)
{
/* Check the parameters */
assert_param(IS_PWR_REGULATOR(Regulator));
assert_param(IS_PWR_SLEEP_ENTRY(SLEEPEntry));
/* Clear SLEEPDEEP bit of Cortex System Control Register */
CLEAR_BIT(SCB->SCR, ((uint32_t)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();
}
}
/**
* @brief Enters Sleep mode.
*
* @note In Sleep mode, all I/O pins keep the same state as in Run mode.
*
* @note In Sleep mode, the systick is stopped to avoid exit from this mode with
* systick interrupt when used as time base for Timeout
*
* @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
* @note This parameter is not used for the STM32F2 family and is kept as parameter
* just to maintain compatibility with the lower power families.
* @param SLEEPEntry: Specifies if SLEEP mode in entered with WFI or WFE instruction.
* 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)
{
/* Check the parameters */
assert_param(IS_PWR_REGULATOR(Regulator));
assert_param(IS_PWR_SLEEP_ENTRY(SLEEPEntry));
/* Disable SysTick Timer */
SysTick->CTRL &= 0xFE;
/* Select SLEEP mode entry -------------------------------------------------*/
if(SLEEPEntry == PWR_SLEEPENTRY_WFI)
{
/* Request Wait For Interrupt */
__WFI();
}
else
{
/* Request Wait For Event */
__WFE();
}
/* Enable SysTick Timer */
SysTick->CTRL |= 0x01;
}
/**
* @brief Enters Sleep mode.
* @note In Sleep mode, all I/O pins keep the same state as in Run mode.
* @param PWR_Regulator: specifies the regulator state in Sleep mode.
* This parameter can be one of the following values:
* @arg PWR_Regulator_ON: Sleep mode with regulator ON
* @arg PWR_Regulator_LowPower: Sleep mode with regulator in low power mode
* @note Low power sleep mode can only be entered when VCORE is in range 2.
* @note When the voltage regulator operates in low power mode, an additional
* startup delay is incurred when waking up from Low power sleep mode.
* @param PWR_SLEEPEntry: specifies if SLEEP mode in entered with WFI or WFE instruction.
* 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 PWR_EnterSleepMode(uint32_t PWR_Regulator, uint8_t PWR_SLEEPEntry)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_PWR_REGULATOR(PWR_Regulator));
assert_param(IS_PWR_SLEEP_ENTRY(PWR_SLEEPEntry));
/* Select the regulator state in Sleep mode ---------------------------------*/
tmpreg = PWR->CR;
/* Clear PDDS and LPDSR bits */
tmpreg &= CR_DS_MASK;
/* Set LPDSR bit according to PWR_Regulator value */
tmpreg |= PWR_Regulator;
/* Store the new value */
PWR->CR = tmpreg;
/* Clear SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP);
/* Select SLEEP mode entry -------------------------------------------------*/
if(PWR_SLEEPEntry == PWR_SLEEPEntry_WFI)
{
/* Request Wait For Interrupt */
__WFI();
}
else
{
/* Request Wait For Event */
__WFE();
}
}
