* @brief Checks whether the specified PWR flag is set or not.
* @param PWR_FLAG: specifies the flag to check.
* This parameter can be one of the following values:
* @arg PWR_FLAG_WU: Wake Up flag. This flag indicates that a wakeup event
* was received from the WKUP pin or from the RTC alarm (Alarm A
* or Alarm B), RTC Tamper event, RTC TimeStamp event or RTC Wakeup.
* An additional wakeup event is detected if the WKUP pin is enabled
* (by setting the EWUP bit) when the WKUP pin level is already high.
* @arg PWR_FLAG_SB: StandBy flag. This flag indicates that the system was
* resumed from StandBy mode.
* @arg PWR_FLAG_PVDO: PVD Output. This flag is valid only if PVD is enabled
* by the PWR_PVDCmd() function. The PVD is stopped by Standby mode
* For this reason, this bit is equal to 0 after Standby or reset
* until the PVDE bit is set.
* @arg PWR_FLAG_BRR: Backup regulator ready flag. This bit is not reset
* when the device wakes up from Standby mode or by a system reset
* or power reset.
* @arg PWR_FLAG_VOSRDY: This flag indicates that the Regulator voltage
* scaling output selection is ready.
* @arg PWR_FLAG_ODRDY: This flag indicates that the Over-drive mode
* is ready (STM32F42xxx/43xxx devices)
* @arg PWR_FLAG_ODSWRDY: This flag indicates that the Over-drive mode
* switching is ready (STM32F42xxx/43xxx devices)
* @arg PWR_FLAG_UDRDY: This flag indicates that the Under-drive mode
* is enabled in Stop mode (STM32F42xxx/43xxx devices)
* @retval The new state of PWR_FLAG (SET or RESET).
*/
FlagStatus PWR_GetFlagStatus(uint32_t PWR_FLAG)
{
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_PWR_GET_FLAG(PWR_FLAG));
if ((PWR->CSR & PWR_FLAG) != (uint32_t)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
/* Return the flag status */
return bitstatus;
}
/**
* @brief Clears the PWR's pending flags.
* @param PWR_FLAG: specifies the flag to clear.
* This parameter can be one of the following values:
* @arg PWR_FLAG_WU: Wake Up flag
* @arg PWR_FLAG_SB: StandBy flag
* @arg PWR_FLAG_UDRDY: Under-drive ready flag (STM32F42xxx/43xxx devices)
* @retval None
*/
void PWR_ClearFlag(uint32_t PWR_FLAG)
{
/* Check the parameters */
assert_param(IS_PWR_CLEAR_FLAG(PWR_FLAG));
#if defined (STM32F427_437xx) || defined (STM32F429_439xx)
if (PWR_FLAG != PWR_FLAG_UDRDY)
{
PWR->CR |= PWR_FLAG << 2;
}
else
{
PWR->CSR |= PWR_FLAG_UDRDY;
}
#endif /* STM32F427_437xx || STM32F429_439xx */
#if defined (STM32F40_41xxx) || defined (STM32F401xx) || defined (STM32F410xx) || defined (STM32F411xE) || defined(STM32F412xG) || defined(STM32F413_423xx)