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/*!
* @file apm32f0xx_pmu.c
*
* @brief This file contains all the functions for the PMU peripheral
*
* @version V1.0.3
*
* @date 2022-09-20
*
* @attention
*
* Copyright (C) 2020-2022 Geehy Semiconductor
*
* You may not use this file except in compliance with the
* GEEHY COPYRIGHT NOTICE (GEEHY SOFTWARE PACKAGE LICENSE).
*
* The program is only for reference, which is distributed in the hope
* that it will be useful and instructional for customers to develop
* their software. Unless required by applicable law or agreed to in
* writing, the program is distributed on an "AS IS" BASIS, WITHOUT
* ANY WARRANTY OR CONDITIONS OF ANY KIND, either express or implied.
* See the GEEHY SOFTWARE PACKAGE LICENSE for the governing permissions
* and limitations under the License.
*/
#include "apm32f0xx_pmu.h"
#include "apm32f0xx_rcm.h"
/** @addtogroup APM32F0xx_StdPeriphDriver
@{
*/
/** @addtogroup PMU_Driver PMU Driver
@{
*/
/** @defgroup PMU_Macros Macros
@{
*/
/**@} end of group PMU_Macros*/
/** @defgroup PMU_Enumerations Enumerations
@{
*/
/**@} end of group PMU_Enumerations*/
/** @defgroup PMU_Structures Structures
@{
*/
/**@} end of group PMU_Structures*/
/** @defgroup PMU_Variables Variables
@{
*/
/**@} end of group PMU_Variables*/
/** @defgroup PMU_Functions Functions
@{
*/
/*!
* @brief Resets the PWR peripheral registers to their default reset values
*
* @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 Backup domain registers
*
* @param None
*
* @retval None
*/
void PMU_EnableBackupAccess(void)
{
PMU->CTRL_B.BPWEN = BIT_SET;
}
/*!
* @brief Disables access to the Backup domain registers
*
* @param None
*
* @retval None
*/
void PMU_DisableBackupAccess(void)
{
PMU->CTRL_B.BPWEN = BIT_RESET;
}
/*!
* @brief Configures the PMU PVD Level
*
* @param level: specifies the PVD Level
* This parameter can be one of the following values
* @arg PMU_PVDLEVEL_0
* @arg PMU_PVDLEVEL_1
* @arg PMU_PVDLEVEL_2
* @arg PMU_PVDLEVEL_3
* @arg PMU_PVDLEVEL_4
* @arg PMU_PVDLEVEL_5
* @arg PMU_PVDLEVEL_6
* @arg PMU_PVDLEVEL_7
*
* @retval None
*
* @note It's not for APM32F030 devices
*/
void PMU_ConfigPVDLevel(PMU_PVDLEVEL_T level)
{
PMU->CTRL_B.PLSEL = level;
}
/*!
* @brief Enables Power voltage detector
*
* @param None
*
* @retval None
*
* @note It's not for APM32F030 devices
*/
void PMU_EnablePVD(void)
{
PMU->CTRL_B.PVDEN = BIT_SET;
}
/*!
* @brief Disables Power voltage detector
*
* @param None
*
* @retval None
*
* @note It's not for APM32F030 devices
*/
void PMU_DisablePVD(void)
{
PMU->CTRL_B.PVDEN = BIT_RESET;
}
/*!
* @brief Enables the WakeUp Pin functionality
*
* @param pin: specifies the WakeUpPin
* This parameter can be one of the following values
* @arg PMU_WAKEUPPIN_1
* @arg PMU_WAKEUPPIN_2
* @arg PMU_WAKEUPPIN_3 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_4 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_5 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_6 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_7 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_8 It's Only for APM32F072/091 devices
*
* @retval None
*/
void PMU_EnableWakeUpPin(PMU_WAKEUPPIN_T pin)
{
PMU->CSTS |= pin;
}
/*!
* @brief DIsable the WakeUp Pin functionality
*
* @param pin: specifies the WakeUpPin
* This parameter can be one of the following values
* @arg PMU_WAKEUPPIN_1
* @arg PMU_WAKEUPPIN_2
* @arg PMU_WAKEUPPIN_3 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_4 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_5 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_6 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_7 It's Only for APM32F072/091 devices
* @arg PMU_WAKEUPPIN_8 It's Only for APM32F072/091 devices
*
* @retval None
*/
void PMU_DisableWakeUpPin(PMU_WAKEUPPIN_T pin)
{
PMU->CSTS &= ~pin;
}
/*!
* @brief Enters Sleep mode
*
* @param entry :specifies if SLEEP mode in entered with WFI or WFE instruction
* This parameter can be one of the following values:
* @arg PMU_SLEEPENTRY_WFI: enter SLEEP mode with WFI instruction
* @arg PMU_SLEEPENTRY_WFE: enter SLEEP mode with WFE instruction
*
* @retval None
*/
void PMU_EnterSleepMode(PMU_SLEEPENTRY_T entry)
{
SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
if (entry == PMU_SLEEPENTRY_WFI)
{
__WFI();
}
else
{
__SEV();
__WFE();
__WFE();
}
}
/*!
* @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_STOPENTRY_WFI: enter STOP mode with WFI instruction
* @arg PMU_STOPENTRY_WFE: enter STOP mode with WFE instruction
* @arg PMU_STOPENTRY_SLEEPONEXIT: enter STOP mode with SLEEPONEXIT instruction
*
* @retval None
*/
void PMU_EnterSTOPMode(PMU_REGULATOR_T regulator, PMU_STOPENTRY_T entry)
{
PMU->CTRL_B.PDDSCFG = BIT_RESET;
PMU->CTRL_B.LPDSCFG = regulator;
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
switch (entry)
{
case PMU_STOPENTRY_WFI:
__WFI();
SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
break;
case PMU_STOPENTRY_WFE:
__WFE();
SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
break;
case PMU_STOPENTRY_SLEEPONEXIT:
SCB->SCR |= SCB_SCR_SLEEPONEXIT_Msk;
break;
default:
break;
}
}
/*!
* @brief Enters STANDBY mode
*
* @param None
*
* @retval None
*/
void PMU_EnterSTANDBYMode(void)
{
PMU->CTRL_B.PDDSCFG = BIT_SET;
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
__WFI();
}
/*!
* @brief Checks whether the specified PMU flag is set or not
*
* @param flag: specifies the flag to check
* This parameter can be one of the following values:
* @arg PMU_FLAG_WUPF: Wake Up flag
* @arg PMU_FLAG_STDBYF: StandBy flag
* @arg PMU_FLAG_PVDOF: PVD output flag (Not for APM32F030)
* @arg PMU_FLAG_VREFINTF: VREFINT flag
*
* @retval The new state of PMU_FLAG (SET or RESET)
*/
uint8_t PMU_ReadStatusFlag(PMU_FLAG_T flag)
{
uint8_t bit;
if ((PMU->CSTS & flag) != (uint32_t)RESET)
{
bit = SET;
}
else
{
bit = RESET;
}
/** Return the flag status */
return bit;
}
/*!
* @brief Clears the PWR's pending flags
*
* @param flag: specifies the flag to clear
* This parameter can be one of the following values:
* @arg PMU_FLAG_WUPF: Wake Up flag
* @arg PMU_FLAG_STDBYF: StandBy flag
*
* @retval None
*/
void PMU_ClearStatusFlag(uint8_t flag)
{
if (flag == PMU_FLAG_WUPF)
{
PMU->CTRL_B.WUFLGCLR = BIT_SET;
}
else if (flag == PMU_FLAG_STDBYF)
{
PMU->CTRL_B.SBFLGCLR = BIT_SET;
}
}
/**@} end of group PMU_Functions*/
/**@} end of group PMU_Driver */
/**@} end of group APM32F0xx_StdPeriphDriver*/
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