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/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
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* File Name : stm32f10x_pwr.c
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* Author : MCD Application Team
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* Date First Issued : 09/29/2006
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* Description : This file provides all the PWR firmware functions.
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********************************************************************************
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* History:
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* 04/02/2007: V0.2
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* 02/05/2007: V0.1
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* 09/29/2006: V0.01
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********************************************************************************
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* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f10x_pwr.h"
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#include "stm32f10x_rcc.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* --------- PWR registers bit address in the alias region ---------- */
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#define PWR_OFFSET (PWR_BASE - PERIPH_BASE)
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/* --- CR Register ---*/
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/* Alias word address of DBP bit */
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#define CR_OFFSET (PWR_OFFSET + 0x00)
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#define DBP_BitNumber 0x08
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#define CR_DBP_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (DBP_BitNumber * 4))
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/* Alias word address of PVDE bit */
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#define PVDE_BitNumber 0x04
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#define CR_PVDE_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PVDE_BitNumber * 4))
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/* --- CSR Register ---*/
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/* Alias word address of EWUP bit */
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#define CSR_OFFSET (PWR_OFFSET + 0x04)
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#define EWUP_BitNumber 0x08
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#define CSR_EWUP_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (EWUP_BitNumber * 4))
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/* ------------------ PWR registers bit mask ------------------------ */
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/* CR register bit mask */
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#define CR_PDDS_Set ((u32)0x00000002)
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#define CR_DS_Mask ((u32)0xFFFFFFFC)
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#define CR_CWUF_Set ((u32)0x00000004)
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#define CR_PLS_Mask ((u32)0xFFFFFF1F)
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/* --------- Cortex System Control register bit mask ---------------- */
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/* Cortex System Control register address */
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#define SCB_SysCtrl ((u32)0xE000ED10)
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/* SLEEPDEEP bit mask */
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#define SysCtrl_SLEEPDEEP_Set ((u32)0x00000004)
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/*******************************************************************************
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* Function Name : PWR_DeInit
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* Description : Deinitializes the PWR peripheral registers to their default
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* reset values.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void PWR_DeInit(void)
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{
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, ENABLE);
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, DISABLE);
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}
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/*******************************************************************************
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* Function Name : PWR_BackupAccessCmd
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* Description : Enables or disables access to the RTC and backup registers.
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* Input : - NewState: new state of the access to the RTC and backup
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* registers. This parameter can be: ENABLE or DISABLE.
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* Output : None
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* Return : None
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*******************************************************************************/
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void PWR_BackupAccessCmd(FunctionalState NewState)
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{
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/* Check the parameters */
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assert(IS_FUNCTIONAL_STATE(NewState));
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*(vu32 *) CR_DBP_BB = (u32)NewState;
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}
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/*******************************************************************************
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* Function Name : PWR_PVDCmd
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* Description : Enables or disables the Power Voltage Detector(PVD).
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* Input : - NewState: new state of the PVD.
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* This parameter can be: ENABLE or DISABLE.
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* Output : None
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* Return : None
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*******************************************************************************/
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void PWR_PVDCmd(FunctionalState NewState)
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{
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/* Check the parameters */
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assert(IS_FUNCTIONAL_STATE(NewState));
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*(vu32 *) CR_PVDE_BB = (u32)NewState;
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}
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/*******************************************************************************
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* Function Name : PWR_PVDLevelConfig
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* Description : Configures the value detected by the Power Voltage Detector(PVD).
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* Input : - PWR_PVDLevel: specifies the PVD detection level
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* This parameter can be one of the following values:
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* - PWR_PVDLevel_2V2: PVD detection level set to 2.2V
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* - PWR_PVDLevel_2V3: PVD detection level set to 2.3V
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* - PWR_PVDLevel_2V4: PVD detection level set to 2.4V
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* - PWR_PVDLevel_2V5: PVD detection level set to 2.5V
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* - PWR_PVDLevel_2V6: PVD detection level set to 2.6V
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* - PWR_PVDLevel_2V7: PVD detection level set to 2.7V
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* - PWR_PVDLevel_2V8: PVD detection level set to 2.8V
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* - PWR_PVDLevel_2V9: PVD detection level set to 2.9V
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* Output : None
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* Return : None
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*******************************************************************************/
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void PWR_PVDLevelConfig(u32 PWR_PVDLevel)
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{
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u32 tmpreg = 0;
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/* Check the parameters */
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assert(IS_PWR_PVD_LEVEL(PWR_PVDLevel));
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tmpreg = PWR->CR;
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/* Clear PLS[7:5] bits */
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tmpreg &= CR_PLS_Mask;
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/* Set PLS[7:5] bits according to PWR_PVDLevel value */
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tmpreg |= PWR_PVDLevel;
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/* Store the new value */
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PWR->CR = tmpreg;
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}
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/*******************************************************************************
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* Function Name : PWR_WakeUpPinCmd
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* Description : Enables or disables the WakeUp Pin functionality.
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* Input : - NewState: new state of the WakeUp Pin functionality.
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* This parameter can be: ENABLE or DISABLE.
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* Output : None
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* Return : None
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*******************************************************************************/
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void PWR_WakeUpPinCmd(FunctionalState NewState)
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{
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/* Check the parameters */
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assert(IS_FUNCTIONAL_STATE(NewState));
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*(vu32 *) CSR_EWUP_BB = (u32)NewState;
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}
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/*******************************************************************************
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* Function Name : PWR_EnterSTOPMode
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* Description : Enters STOP mode.
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* Input : - PWR_Regulator: specifies the regulator state in STOP mode.
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* This parameter can be one of the following values:
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* - PWR_Regulator_ON: STOP mode with regulator ON
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* - PWR_Regulator_LowPower: STOP mode with
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* regulator in low power mode
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* - PWR_STOPEntry: specifies if STOP mode in entered with WFI or
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* WFE instruction.
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* This parameter can be one of the following values:
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* - PWR_STOPEntry_WFI: enter STOP mode with WFI instruction
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* - PWR_STOPEntry_WFE: enter STOP mode with WFE instruction
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* Output : None
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* Return : None
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*******************************************************************************/
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void PWR_EnterSTOPMode(u32 PWR_Regulator, u8 PWR_STOPEntry)
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{
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u32 tmpreg = 0;
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/* Check the parameters */
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assert(IS_PWR_REGULATOR(PWR_Regulator));
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assert(IS_PWR_STOP_ENTRY(PWR_STOPEntry));
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/* Select the regulator state in STOP mode ---------------------------------*/
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tmpreg = PWR->CR;
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/* Clear PDDS and LPDS bits */
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tmpreg &= CR_DS_Mask;
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/* Set LPDS bit according to PWR_Regulator value */
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tmpreg |= PWR_Regulator;
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/* Store the new value */
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PWR->CR = tmpreg;
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/* Set SLEEPDEEP bit of Cortex System Control Register */
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*(vu32 *) SCB_SysCtrl |= SysCtrl_SLEEPDEEP_Set;
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/* Select STOP mode entry --------------------------------------------------*/
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if(PWR_STOPEntry == PWR_STOPEntry_WFI)
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{
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/* Request Wait For Interrupt */
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__WFI();
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}
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else
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{
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/* Request Wait For Event */
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__WFE();
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}
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}
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/*******************************************************************************
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* Function Name : PWR_EnterSTANDBYMode
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* Description : Enters STANDBY mode.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void PWR_EnterSTANDBYMode(void)
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{
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/* Clear Wake-up flag */
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PWR->CR |= CR_CWUF_Set;
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/* Select STANDBY mode */
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PWR->CR |= CR_PDDS_Set;
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/* Set SLEEPDEEP bit of Cortex System Control Register */
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*(vu32 *) SCB_SysCtrl |= SysCtrl_SLEEPDEEP_Set;
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/* Request Wait For Interrupt */
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__WFI();
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}
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/*******************************************************************************
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* Function Name : PWR_GetFlagStatus
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* Description : Checks whether the specified PWR flag is set or not.
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* Input : - PWR_FLAG: specifies the flag to check.
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* This parameter can be one of the following values:
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* - PWR_FLAG_WU: Wake Up flag
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* - PWR_FLAG_SB: StandBy flag
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* - PWR_FLAG_PVDO: PVD Output
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* Output : None
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* Return : The new state of PWR_FLAG (SET or RESET).
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*******************************************************************************/
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FlagStatus PWR_GetFlagStatus(u32 PWR_FLAG)
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{
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FlagStatus bitstatus = RESET;
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/* Check the parameters */
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assert(IS_PWR_GET_FLAG(PWR_FLAG));
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if ((PWR->CSR & PWR_FLAG) != (u32)RESET)
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{
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bitstatus = SET;
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}
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else
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{
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bitstatus = RESET;
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}
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/* Return the flag status */
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return bitstatus;
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}
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/*******************************************************************************
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* Function Name : PWR_ClearFlag
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* Description : Clears the PWR's pending flags.
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* Input : - PWR_FLAG: specifies the flag to clear.
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* This parameter can be one of the following values:
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* - PWR_FLAG_WU: Wake Up flag
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* - PWR_FLAG_SB: StandBy flag
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* Output : None
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* Return : None
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*******************************************************************************/
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void PWR_ClearFlag(u32 PWR_FLAG)
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{
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/* Check the parameters */
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assert(IS_PWR_CLEAR_FLAG(PWR_FLAG));
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PWR->CR |= PWR_FLAG << 2;
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}
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/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/
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