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rt-thread-official/bsp/ft32/libraries/FT32F0xx/FT32F0xx_Driver/Src/ft32f0xx_pwr.c

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/**
******************************************************************************
* @file ft32f0xx_pwr.c
* @author FMD AE
* @brief This file provides firmware functions to manage the following
* functionalities of the Power Controller (PWR) peripheral:
* + Backup Domain Access
* + PVD configuration
* + WakeUp pins configuration
* + Low Power modes configuration
* + Flags management
* @version V1.0.0
* @data 2021-07-01
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "ft32f0xx_pwr.h"
#include "ft32f0xx_rcc.h"
/* ------------------ PWR registers bit mask ------------------------ */
/* CR register bit mask */
#define CR_DS_MASK ((uint32_t)0xFFFFFFFC)
#define CR_PLS_MASK ((uint32_t)0xFFFFFD1F)
/**
* @brief Deinitializes the PWR peripheral registers to their default reset values.
* @param None
* @retval None
*/
void PWR_DeInit(void)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, DISABLE);
}
/**
* @brief Enables or disables access to the Backup domain registers.
* @note If the HSE divided by 32 is used as the RTC clock, the
* Backup Domain Access should be kept enabled.
* @param NewState: new state of the access to the Backup domain registers.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void PWR_BackupAccessCmd(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the Backup Domain Access */
PWR->CR |= PWR_CR_DBP;
}
else
{
/* Disable the Backup Domain Access */
PWR->CR &= (uint32_t)~((uint32_t)PWR_CR_DBP);
}
}
/**
* @}
*/
/**
* @brief Configures the voltage threshold detected by the Power Voltage Detector(PVD).
* @param PWR_PVDLevel: specifies the PVD detection level
* This parameter can be one of the following values:
* @arg PWR_PVDLevel_0
* @arg PWR_PVDLevel_1
* @arg PWR_PVDLevel_2
* @arg PWR_PVDLevel_3
* @arg PWR_PVDLevel_4
* @arg PWR_PVDLevel_5
* @arg PWR_PVDLevel_6
* @arg PWR_PVDLevel_7
* @arg PWR_PVDLevel_8
* @arg PWR_PVDLevel_9
* @arg PWR_PVDLevel_10
* @arg PWR_PVDLevel_11
* @arg PWR_PVDLevel_12
* @arg PWR_PVDLevel_13
* @arg PWR_PVDLevel_14
* @arg PWR_PVDLevel_15
* @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 PWR_PVDLevelConfig(uint32_t PWR_PVDLevel)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_PWR_PVD_LEVEL(PWR_PVDLevel));
tmpreg = PWR->CR;
/* Clear PLS[7:5] bits PLS3*/
tmpreg &= CR_PLS_MASK;
/* Set PLS[7:5] and PLS3 bits according to PWR_PVDLevel value */
tmpreg |= PWR_PVDLevel;
/* Store the new value */
PWR->CR = tmpreg;
}
/**
* @brief Enables or disables the Power Voltage Detector(PVD).
* @param NewState: new state of the PVD.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void PWR_PVDCmd(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the PVD */
PWR->CR |= PWR_CR_PVDE;
}
else
{
/* Disable the PVD */
PWR->CR &= (uint32_t)~((uint32_t)PWR_CR_PVDE);
}
}
/**
* @}
*/
/**
* @brief Enables or disables the WakeUp Pin functionality.
* @param PWR_WakeUpPin: specifies the WakeUpPin.
* This parameter can be one of the following values
* @arg PWR_WakeUpPin_1
* @arg PWR_WakeUpPin_2
* @arg PWR_WakeUpPin_3
* @arg PWR_WakeUpPin_4
* @arg PWR_WakeUpPin_5
* @arg PWR_WakeUpPin_6
* @arg PWR_WakeUpPin_7
* @arg PWR_WakeUpPin_8
* @param NewState: new state of the WakeUp Pin functionality.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void PWR_WakeUpPinCmd(uint32_t PWR_WakeUpPin, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_PWR_WAKEUP_PIN(PWR_WakeUpPin));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the EWUPx pin */
PWR->CSR |= PWR_WakeUpPin;
}
else
{
/* Disable the EWUPx pin */
PWR->CSR &= ~PWR_WakeUpPin;
}
}
/**
* @}
*/
/**
* @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 */
__SEV();
__WFE();
__WFE();
}
}
/**
* @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,
* 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 PWR_Regulator: specifies the regulator state in STOP mode.
* This parameter can be one of the following values:
* @arg PWR_Regulator_ON: STOP mode with regulator ON
* @arg PWR_Regulator_LowPower: STOP mode with regulator in low power mode
* @param PWR_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
@arg PWR_STOPEntry_SLEEPONEXIT: enter STOP mode with SLEEPONEXIT instruction
* @retval None
*/
void PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_PWR_REGULATOR(PWR_Regulator));
assert_param(IS_PWR_STOP_ENTRY(PWR_STOPEntry));
/* Select the regulator state in STOP 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;
/* Set SLEEPDEEP bit of Cortex-M0 System Control Register */
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
/* Select STOP mode entry --------------------------------------------------*/
if(PWR_STOPEntry == PWR_STOPEntry_WFI)
{
/* Request Wait For Interrupt */
__WFI();
/* Reset SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
}
else if (PWR_STOPEntry == PWR_STOPEntry_WFE)
{
/* Request Wait For Event */
__WFE();
/* Reset SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
}
else
{
/* Set SLEEP on exit bit of Cortex-M0 System Control Register */
SCB->SCR |= SCB_SCR_SLEEPONEXIT_Msk;
}
}
/**
* @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 Wakeup pin 2 (WKUP2), tamper,
* time-stamp, RTC Alarm out, or RTC clock calibration out.
* - WKUP pin 1 (PA0) if enabled.
* @note The Wakeup flag (WUF) need to be cleared at application level before to call this function
* @param None
* @retval None
*/
void PWR_EnterSTANDBYMode(void)
{
/* Select STANDBY mode */
PWR->CR |= PWR_CR_PDDS;
/* Set SLEEPDEEP bit of Cortex-M0 System Control Register */
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
/* Request Wait For Interrupt */
__WFI();
}
/**
* @}
*/
/**
* @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 or RTC TimeStamp event.
* @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.
* @arg PWR_FLAG_VREFINTRDY: Internal Voltage Reference Ready flag.
* This flag indicates the state of the internal voltage
* reference, VREFINT.
* @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
* @retval None
*/
void PWR_ClearFlag(uint32_t PWR_FLAG)
{
/* Check the parameters */
assert_param(IS_PWR_CLEAR_FLAG(PWR_FLAG));
PWR->CR |= PWR_FLAG << 2;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT FMD *****END OF FILE****/
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