- /******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
- * File Name : stm32f10x_pwr.c
- * Author : MCD Application Team
- * Version : V2.0.2
- * Date : 07/11/2008
- * Description : This file provides all the PWR firmware functions.
- ********************************************************************************
- * 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.
- *******************************************************************************/
- /* 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_param(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_param(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_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;
- }
- /*******************************************************************************
- * 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_param(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_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 */
- *(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_param(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_param(IS_PWR_CLEAR_FLAG(PWR_FLAG));
- PWR->CR |= PWR_FLAG << 2;
- }
- /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/