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/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name : stm32f10x_pwr.c
* Author : MCD Application Team
* Date First Issued : 09/29/2006
* Description : This file provides all the PWR firmware functions.
********************************************************************************
* History:
* 05/21/2007: V0.3
* 04/02/2007: V0.2
* 02/05/2007: V0.1
* 09/29/2006: V0.01
********************************************************************************
* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_pwr.h"
#include "stm32f10x_rcc.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* --------- 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_PDDS_Set ((u32)0x00000002)
#define CR_DS_Mask ((u32)0xFFFFFFFC)
#define CR_CWUF_Set ((u32)0x00000004)
#define CR_PLS_Mask ((u32)0xFFFFFF1F)
/* --------- Cortex System Control register bit mask ---------------- */
/* Cortex System Control register address */
#define SCB_SysCtrl ((u32)0xE000ED10)
/* SLEEPDEEP bit mask */
#define SysCtrl_SLEEPDEEP_Set ((u32)0x00000004)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : PWR_DeInit
* Description : Deinitializes the PWR peripheral registers to their default
* reset values.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void PWR_DeInit(void)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, DISABLE);
}
/*******************************************************************************
* Function Name : PWR_BackupAccessCmd
* Description : Enables or disables access to the RTC and backup registers.
* Input : - NewState: new state of the access to the RTC and backup
* registers. This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void PWR_BackupAccessCmd(FunctionalState NewState)
{
/* Check the parameters */
assert(IS_FUNCTIONAL_STATE(NewState));
*(vu32 *) CR_DBP_BB = (u32)NewState;
}
/*******************************************************************************
* Function Name : PWR_PVDCmd
* Description : Enables or disables the Power Voltage Detector(PVD).
* Input : - NewState: new state of the PVD.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void PWR_PVDCmd(FunctionalState NewState)
{
/* Check the parameters */
assert(IS_FUNCTIONAL_STATE(NewState));
*(vu32 *) CR_PVDE_BB = (u32)NewState;
}
/*******************************************************************************
* Function Name : PWR_PVDLevelConfig
* Description : Configures the voltage threshold detected by the Power Voltage
* Detector(PVD).
* Input : - PWR_PVDLevel: specifies the PVD detection level
* This parameter can be one of the following values:
* - PWR_PVDLevel_2V2: PVD detection level set to 2.2V
* - PWR_PVDLevel_2V3: PVD detection level set to 2.3V
* - PWR_PVDLevel_2V4: PVD detection level set to 2.4V
* - PWR_PVDLevel_2V5: PVD detection level set to 2.5V
* - PWR_PVDLevel_2V6: PVD detection level set to 2.6V
* - PWR_PVDLevel_2V7: PVD detection level set to 2.7V
* - PWR_PVDLevel_2V8: PVD detection level set to 2.8V
* - PWR_PVDLevel_2V9: PVD detection level set to 2.9V
* Output : None
* Return : None
*******************************************************************************/
void PWR_PVDLevelConfig(u32 PWR_PVDLevel)
{
u32 tmpreg = 0;
/* Check the parameters */
assert(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;
}
/*******************************************************************************
* Function Name : PWR_WakeUpPinCmd
* Description : Enables or disables the WakeUp Pin functionality.
* Input : - NewState: new state of the WakeUp Pin functionality.
* This parameter can be: ENABLE or DISABLE.
* Output : None
* Return : None
*******************************************************************************/
void PWR_WakeUpPinCmd(FunctionalState NewState)
{
/* Check the parameters */
assert(IS_FUNCTIONAL_STATE(NewState));
*(vu32 *) CSR_EWUP_BB = (u32)NewState;
}
/*******************************************************************************
* Function Name : PWR_EnterSTOPMode
* Description : Enters STOP mode.
* Input : - PWR_Regulator: specifies the regulator state in STOP mode.
* This parameter can be one of the following values:
* - PWR_Regulator_ON: STOP mode with regulator ON
* - PWR_Regulator_LowPower: STOP mode with
* regulator in low power mode
* - PWR_STOPEntry: specifies if STOP mode in entered with WFI or
* WFE instruction.
* This parameter can be one of the following values:
* - PWR_STOPEntry_WFI: enter STOP mode with WFI instruction
* - PWR_STOPEntry_WFE: enter STOP mode with WFE instruction
* Output : None
* Return : None
*******************************************************************************/
void PWR_EnterSTOPMode(u32 PWR_Regulator, u8 PWR_STOPEntry)
{
u32 tmpreg = 0;
/* Check the parameters */
assert(IS_PWR_REGULATOR(PWR_Regulator));
assert(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 */
*(vu32 *) SCB_SysCtrl |= SysCtrl_SLEEPDEEP_Set;
/* Select STOP mode entry --------------------------------------------------*/
if(PWR_STOPEntry == PWR_STOPEntry_WFI)
{
/* Request Wait For Interrupt */
__WFI();
}
else
{
/* Request Wait For Event */
__WFE();
}
}
/*******************************************************************************
* Function Name : PWR_EnterSTANDBYMode
* Description : Enters STANDBY mode.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void PWR_EnterSTANDBYMode(void)
{
/* Clear Wake-up flag */
PWR->CR |= CR_CWUF_Set;
/* Select STANDBY mode */
PWR->CR |= CR_PDDS_Set;
/* Set SLEEPDEEP bit of Cortex System Control Register */
*(vu32 *) SCB_SysCtrl |= SysCtrl_SLEEPDEEP_Set;
/* Request Wait For Interrupt */
__WFI();
}
/*******************************************************************************
* Function Name : PWR_GetFlagStatus
* Description : Checks whether the specified PWR flag is set or not.
* Input : - PWR_FLAG: specifies the flag to check.
* This parameter can be one of the following values:
* - PWR_FLAG_WU: Wake Up flag
* - PWR_FLAG_SB: StandBy flag
* - PWR_FLAG_PVDO: PVD Output
* Output : None
* Return : The new state of PWR_FLAG (SET or RESET).
*******************************************************************************/
FlagStatus PWR_GetFlagStatus(u32 PWR_FLAG)
{
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert(IS_PWR_GET_FLAG(PWR_FLAG));
if ((PWR->CSR & PWR_FLAG) != (u32)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
/* Return the flag status */
return bitstatus;
}
/*******************************************************************************
* Function Name : PWR_ClearFlag
* Description : Clears the PWR's pending flags.
* Input : - PWR_FLAG: specifies the flag to clear.
* This parameter can be one of the following values:
* - PWR_FLAG_WU: Wake Up flag
* - PWR_FLAG_SB: StandBy flag
* Output : None
* Return : None
*******************************************************************************/
void PWR_ClearFlag(u32 PWR_FLAG)
{
/* Check the parameters */
assert(IS_PWR_CLEAR_FLAG(PWR_FLAG));
PWR->CR |= PWR_FLAG << 2;
}
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/