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/*!
* @file apm32f10x_pmu.c
*
* @brief This file provides all the PMU firmware functions.
*
* @version V1.0.1
*
* @date 2021-03-23
*
*/
#include "apm32f10x_pmu.h"
#include "apm32f10x_rcm.h"
/** @addtogroup Peripherals_Library Standard Peripheral Library
@{
*/
/** @addtogroup PMU_Driver PMU Driver
@{
*/
/** @addtogroup PMU_Fuctions Fuctions
@{
*/
/*!
* @brief Reset the PMU peripheral register.
*
* @param None
*
* @retval None
*/
void PMU_Reset(void)
{
RCM_EnableAPB1PeriphClock(RCM_APB1_PERIPH_PMU);
RCM_DisableAPB1PeriphClock(RCM_APB1_PERIPH_PMU);
}
/*!
* @brief Enables access to the RTC and backup registers.
*
* @param None
*
* @retval None
*/
void PMU_EnableBackupAccess(void)
{
PMU->CTRL_B.BPWEN = ENABLE ;
}
/*!
* @brief Disables access to the RTC and backup registers.
*
* @param None
*
* @retval None
*/
void PMU_DisableBackupAccess(void)
{
PMU->CTRL_B.BPWEN = DISABLE;
}
/*!
* @brief Enables the Power Voltage Detector(PVD).
*
* @param None
*
* @retval None
*/
void PMU_EnablePVD(void)
{
PMU->CTRL_B.PVDEN = ENABLE;
}
/*!
* @brief Disables the Power Voltage Detector(PVD).
*
* @param None
*
* @retval None
*/
void PMU_DisablePVD(void)
{
PMU->CTRL_B.PVDEN = DISABLE;
}
/*!
* @brief Configure a voltage threshold detected by a power supply voltage detector (PVD).
*
* @param level : specifies the PVD detection level
* This parameter can be one of the following values:
* @arg PMU_PVD_LEVEL_2V2 : Config PVD detection level to 2.2V
* @arg PMU_PVD_LEVEL_2V3 : Config PVD detection level to 2.3V
* @arg PMU_PVD_LEVEL_2V4 : Config PVD detection level to 2.4V
* @arg PMU_PVD_LEVEL_2V5 : Config PVD detection level to 2.5V
* @arg PMU_PVD_LEVEL_2V6 : Config PVD detection level to 2.6V
* @arg PMU_PVD_LEVEL_2V7 : Config PVD detection level to 2.7V
* @arg PMU_PVD_LEVEL_2V8 : Config PVD detection level to 2.8V
* @arg PMU_PVD_LEVEL_2V9 : Config PVD detection level to 2.9V
*
* @retval None
*/
void PMU_ConfigPVDLevel(PMU_PVD_LEVEL_T level)
{
/* Clear PLS[7:5] bits */
PMU->CTRL_B.PLSEL = 0x0000;
/* Store the new value */
PMU->CTRL_B.PLSEL = level;
}
/*!
* @brief Enables the WakeUp Pin functionality.
*
* @param None
*
* @retval None
*/
void PMU_EnableWakeUpPin(void)
{
PMU->CSTS_B.WKUPCFG = ENABLE ;
}
/*!
* @brief Diaables the WakeUp Pin functionality.
*
* @param None
*
* @retval None
*/
void PMU_DisableWakeUpPin(void)
{
PMU->CSTS_B.WKUPCFG = DISABLE ;
}
/*!
* @brief Enters STOP mode.
*
* @param regulator: specifies the regulator state in STOP mode.
* This parameter can be one of the following values:
* @arg PMU_REGULATOR_ON : STOP mode with regulator ON
* @arg PMU_REGULATOR_LOWPOWER: STOP mode with regulator in low power mode
*
* @param entry: specifies if STOP mode in entered with WFI or WFE instruction.
* This parameter can be one of the following values:
* @arg PMU_STOP_ENTRY_WFI: Enter STOP mode with WFI instruction
* @arg PMU_STOP_ENTRY_WFE: Enter STOP mode with WFE instruction
*
* @retval None
*/
void PMU_EnterSTOPMode(PMU_REGULATOR_T regulator, PMU_STOP_ENTRY_T entry)
{
/** Clear PLS and LPSM bits */
PMU->CTRL_B.PDDSCFG = 0x00;
PMU->CTRL_B.LPDSCFG = 0x00;
/** Set LPSM bit according to PWR_Regulator value */
PMU->CTRL_B.PDDSCFG = regulator;
/** Select STOP mode entry*/
if(entry == PMU_STOP_ENTRY_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)0x04);
}
/*!
* @brief Enters STANDBY mode.
*
* @param None
*
* @retval None
*/
void PMU_EnterSTANDBYMode(void)
{
/* Clear Wake-up flag */
PMU->CTRL_B.WUFLGCLR = BIT_SET;
/* Select STANDBY mode */
PMU->CTRL_B.PDDSCFG = BIT_SET;
/* Set SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR |= (uint8_t )0x04;
#if defined ( __CC_ARM )
__force_stores();
#endif
/* Request Wait For Interrupt */
__WFI();
}
/*!
* @brief Read the specified PWR flag is set or not.
*
* @param flag : Reads the status of specifies the flag.
* This parameter can be one of the following values:
* @arg PMU_FLAG_WUE : Wake Up flag
* @arg PMU_FLAG_SB : StandBy flag
* @arg PMU_FLAG_PVDO: PVD Output flag
*
* @retval The new state of PMU_FLAG (SET or RESET).
*/
uint8_t PMU_ReadStatusFlag(PMU_FLAG_T flag)
{
uint8_t BitStatus = BIT_RESET;
if(flag == PMU_FLAG_WUE)
{
BitStatus = PMU->CSTS_B.WUEFLG;
} else if(flag == PMU_FLAG_SB)
{
BitStatus = PMU->CSTS_B.SBFLG;
} else if(flag == PMU_FLAG_PVDO)
{
BitStatus = PMU->CSTS_B.PVDOFLG;
}
return BitStatus;
}
/*!
* @brief Clears the PWR's pending flags.
*
* @param flag : Clears the status of specifies the flag.
* This parameter can be one of the following values:
* @arg PMU_FLAG_WUE : Wake Up flag
* @arg PMU_FLAG_SB : StandBy flag
*
* @retval None
*/
void PMU_ClearStatusFlag(PMU_FLAG_T flag)
{
if(flag == PMU_FLAG_WUE)
{
PMU->CTRL_B.WUFLGCLR = BIT_SET;
} else if(flag == PMU_FLAG_SB)
{
PMU->CTRL_B.SBFLGCLR = BIT_SET;
}
}
/**@} end of group PMU_Fuctions*/
/**@} end of group PMU_Driver */
/**@} end of group Peripherals_Library*/
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