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/**
******************************************************************************
* @file stm32f10x_pwr.c
* @author MCD Application Team
* @version V3.5.0
* @date 11-March-2011
* @brief This file provides all the PWR firmware functions.
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_pwr.h"
#include "stm32f10x_rcc.h"
/** @addtogroup STM32F10x_StdPeriph_Driver
* @{
*/
/** @defgroup PWR
* @brief PWR driver modules
* @{
*/
/** @defgroup PWR_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup PWR_Private_Defines
* @{
*/
/* --------- PWR registers bit address in the alias region ---------- */
#define PWR_OFFSET (PWR_BASE - PERIPH_BASE)
/* --- CR Register ---*/
/* Alias word address of DBP bit */
#define CR_OFFSET (PWR_OFFSET + 0x00)
#define DBP_BitNumber 0x08
#define CR_DBP_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (DBP_BitNumber * 4))
/* Alias word address of PVDE bit */
#define PVDE_BitNumber 0x04
#define CR_PVDE_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PVDE_BitNumber * 4))
/* --- CSR Register ---*/
/* Alias word address of EWUP bit */
#define CSR_OFFSET (PWR_OFFSET + 0x04)
#define EWUP_BitNumber 0x08
#define CSR_EWUP_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (EWUP_BitNumber * 4))
/* ------------------ PWR registers bit mask ------------------------ */
/* CR register bit mask */
#define CR_DS_MASK ((uint32_t)0xFFFFFFFC)
#define CR_PLS_MASK ((uint32_t)0xFFFFFF1F)
/**
* @}
*/
/** @defgroup PWR_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup PWR_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup PWR_Private_FunctionPrototypes
* @{
*/
/**
* @}
*/
/** @defgroup PWR_Private_Functions
* @{
*/
/**
* @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 RTC and backup registers.
* @param NewState: new state of the access to the RTC and backup registers.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void PWR_BackupAccessCmd(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
*(__IO uint32_t *) CR_DBP_BB = (uint32_t)NewState;
}
/**
* @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));
*(__IO uint32_t *) CR_PVDE_BB = (uint32_t)NewState;
}
/**
* @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_2V2: PVD detection level set to 2.2V
* @arg PWR_PVDLevel_2V3: PVD detection level set to 2.3V
* @arg PWR_PVDLevel_2V4: PVD detection level set to 2.4V
* @arg PWR_PVDLevel_2V5: PVD detection level set to 2.5V
* @arg PWR_PVDLevel_2V6: PVD detection level set to 2.6V
* @arg PWR_PVDLevel_2V7: PVD detection level set to 2.7V
* @arg PWR_PVDLevel_2V8: PVD detection level set to 2.8V
* @arg PWR_PVDLevel_2V9: PVD detection level set to 2.9V
* @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 */
tmpreg &= CR_PLS_MASK;
/* Set PLS[7:5] bits according to PWR_PVDLevel value */
tmpreg |= PWR_PVDLevel;
/* Store the new value */
PWR->CR = tmpreg;
}
/**
* @brief Enables or disables the WakeUp Pin functionality.
* @param NewState: new state of the WakeUp Pin functionality.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void PWR_WakeUpPinCmd(FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NewState));
*(__IO uint32_t *) CSR_EWUP_BB = (uint32_t)NewState;
}
/**
* @brief Enters STOP mode.
* @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
* @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 LPDS bits */
tmpreg &= CR_DS_MASK;
/* Set LPDS bit according to PWR_Regulator value */
tmpreg |= PWR_Regulator;
/* Store the new value */
PWR->CR = tmpreg;
/* Set SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR |= SCB_SCR_SLEEPDEEP;
/* Select STOP mode entry --------------------------------------------------*/
if(PWR_STOPEntry == PWR_STOPEntry_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)SCB_SCR_SLEEPDEEP);
}
/**
* @brief Enters STANDBY mode.
* @param None
* @retval None
*/
void PWR_EnterSTANDBYMode(void)
{
/* Clear Wake-up flag */
PWR->CR |= PWR_CR_CWUF;
/* Select STANDBY mode */
PWR->CR |= PWR_CR_PDDS;
/* Set SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR |= SCB_SCR_SLEEPDEEP;
/* This option is used to ensure that store operations are completed */
#if defined ( __CC_ARM )
__force_stores();
#endif
/* 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
* @arg PWR_FLAG_SB: StandBy flag
* @arg PWR_FLAG_PVDO: PVD Output
* @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 2011 STMicroelectronics *****END OF FILE****/
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