/** ****************************************************************************** * @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. * *

© COPYRIGHT 2011 STMicroelectronics

****************************************************************************** */ /* 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****/