Mercurial > public > ostc4
view Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_timebase_rtc_wakeup_template.c @ 278:cc30d1aa03a7
Merged in Ideenmodellierer/ostc4/IPC_Sync_Improvment_3 (pull request #21)
IPC Sync Improvment 3
author | heinrichsweikamp <bitbucket@heinrichsweikamp.com> |
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date | Sun, 28 Apr 2019 15:54:46 +0000 |
parents | c78bcbd5deda |
children |
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/** ****************************************************************************** * @file stm32f4xx_hal_timebase_rtc_wakeup_template.c * @author MCD Application Team * @brief HAL time base based on the hardware RTC_WAKEUP Template. * * This file overrides the native HAL time base functions (defined as weak) * to use the RTC WAKEUP for the time base generation: * + Intializes the RTC peripheral and configures the wakeup timer to be * incremented each 1ms * + The wakeup feature is configured to assert an interrupt each 1ms * + HAL_IncTick is called inside the HAL_RTCEx_WakeUpTimerEventCallback * + HSE (default), LSE or LSI can be selected as RTC clock source @verbatim ============================================================================== ##### How to use this driver ##### ============================================================================== [..] This file must be copied to the application folder and modified as follows: (#) Rename it to 'stm32f4xx_hal_timebase_rtc_wakeup.c' (#) Add this file and the RTC HAL drivers to your project and uncomment HAL_RTC_MODULE_ENABLED define in stm32f4xx_hal_conf.h [..] (@) HAL RTC alarm and HAL RTC wakeup drivers can’t be used with low power modes: The wake up capability of the RTC may be intrusive in case of prior low power mode configuration requiring different wake up sources. Application/Example behavior is no more guaranteed (@) The stm32f4xx_hal_timebase_tim use is recommended for the Applications/Examples requiring low power modes @endverbatim ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f4xx_hal.h" /** @addtogroup STM32F4xx_HAL_Driver * @{ */ /** @defgroup HAL_TimeBase_RTC_WakeUp_Template HAL TimeBase RTC WakeUp Template * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Uncomment the line below to select the appropriate RTC Clock source for your application: + RTC_CLOCK_SOURCE_HSE: can be selected for applications requiring timing precision. + RTC_CLOCK_SOURCE_LSE: can be selected for applications with low constraint on timing precision. + RTC_CLOCK_SOURCE_LSI: can be selected for applications with low constraint on timing precision. */ #define RTC_CLOCK_SOURCE_HSE /* #define RTC_CLOCK_SOURCE_LSE */ /* #define RTC_CLOCK_SOURCE_LSI */ #ifdef RTC_CLOCK_SOURCE_HSE #define RTC_ASYNCH_PREDIV 99U #define RTC_SYNCH_PREDIV 9U #define RCC_RTCCLKSOURCE_1MHZ ((uint32_t)((uint32_t)RCC_BDCR_RTCSEL | (uint32_t)((HSE_VALUE/1000000U) << 16U))) #else /* RTC_CLOCK_SOURCE_LSE || RTC_CLOCK_SOURCE_LSI */ #define RTC_ASYNCH_PREDIV 0U #define RTC_SYNCH_PREDIV 31U #endif /* RTC_CLOCK_SOURCE_HSE */ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ RTC_HandleTypeDef hRTC_Handle; /* Private function prototypes -----------------------------------------------*/ void RTC_WKUP_IRQHandler(void); /* Private functions ---------------------------------------------------------*/ /** * @brief This function configures the RTC_WKUP as a time base source. * The time source is configured to have 1ms time base with a dedicated * Tick interrupt priority. * Wakeup Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK = 1ms * Wakeup Time = WakeupTimebase * WakeUpCounter (0 + 1) = 1 ms * @note This function is called automatically at the beginning of program after * reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig(). * @param TickPriority Tick interrupt priority. * @retval HAL status */ HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority) { __IO uint32_t counter = 0U; RCC_OscInitTypeDef RCC_OscInitStruct; RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; #ifdef RTC_CLOCK_SOURCE_LSE /* Configue LSE as RTC clock soucre */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; RCC_OscInitStruct.LSEState = RCC_LSE_ON; PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; #elif defined (RTC_CLOCK_SOURCE_LSI) /* Configue LSI as RTC clock soucre */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; RCC_OscInitStruct.LSIState = RCC_LSI_ON; PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; #elif defined (RTC_CLOCK_SOURCE_HSE) /* Configue HSE as RTC clock soucre */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* Ensure that RTC is clocked by 1MHz */ PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_1MHZ; #else #error Please select the RTC Clock source #endif /* RTC_CLOCK_SOURCE_LSE */ if(HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) == HAL_OK) { /* Enable RTC Clock */ __HAL_RCC_RTC_ENABLE(); /* The time base should be 1ms Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK HSE as RTC clock Time base = ((99 + 1) * (9 + 1)) / 1Mhz = 1ms LSE as RTC clock Time base = ((31 + 1) * (0 + 1)) / 32.768Khz = ~1ms LSI as RTC clock Time base = ((31 + 1) * (0 + 1)) / 32Khz = 1ms */ hRTC_Handle.Instance = RTC; hRTC_Handle.Init.HourFormat = RTC_HOURFORMAT_24; hRTC_Handle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV; hRTC_Handle.Init.SynchPrediv = RTC_SYNCH_PREDIV; hRTC_Handle.Init.OutPut = RTC_OUTPUT_DISABLE; hRTC_Handle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; hRTC_Handle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; HAL_RTC_Init(&hRTC_Handle); /* Disable the write protection for RTC registers */ __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); /* Disable the Wake-up Timer */ __HAL_RTC_WAKEUPTIMER_DISABLE(&hRTC_Handle); /* In case of interrupt mode is used, the interrupt source must disabled */ __HAL_RTC_WAKEUPTIMER_DISABLE_IT(&hRTC_Handle,RTC_IT_WUT); /* Wait till RTC WUTWF flag is set */ while(__HAL_RTC_WAKEUPTIMER_GET_FLAG(&hRTC_Handle, RTC_FLAG_WUTWF) == RESET) { if(counter++ == (SystemCoreClock /48U)) { return HAL_ERROR; } } /* Clear PWR wake up Flag */ __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); /* Clear RTC Wake Up timer Flag */ __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_WUTF); /* Configure the Wake-up Timer counter */ hRTC_Handle.Instance->WUTR = 0U; /* Clear the Wake-up Timer clock source bits in CR register */ hRTC_Handle.Instance->CR &= (uint32_t)~RTC_CR_WUCKSEL; /* Configure the clock source */ hRTC_Handle.Instance->CR |= (uint32_t)RTC_WAKEUPCLOCK_CK_SPRE_16BITS; /* RTC WakeUpTimer Interrupt Configuration: EXTI configuration */ __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_IT(); __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_RISING_EDGE(); /* Configure the Interrupt in the RTC_CR register */ __HAL_RTC_WAKEUPTIMER_ENABLE_IT(&hRTC_Handle,RTC_IT_WUT); /* Enable the Wake-up Timer */ __HAL_RTC_WAKEUPTIMER_ENABLE(&hRTC_Handle); /* Enable the write protection for RTC registers */ __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); HAL_NVIC_SetPriority(RTC_WKUP_IRQn, TickPriority, 0U); HAL_NVIC_EnableIRQ(RTC_WKUP_IRQn); return HAL_OK; } } return HAL_ERROR; } /** * @brief Suspend Tick increment. * @note Disable the tick increment by disabling RTC_WKUP interrupt. * @retval None */ void HAL_SuspendTick(void) { /* Disable the write protection for RTC registers */ __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); /* Disable WAKE UP TIMER Interrupt */ __HAL_RTC_WAKEUPTIMER_DISABLE_IT(&hRTC_Handle, RTC_IT_WUT); /* Enable the write protection for RTC registers */ __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); } /** * @brief Resume Tick increment. * @note Enable the tick increment by Enabling RTC_WKUP interrupt. * @retval None */ void HAL_ResumeTick(void) { /* Disable the write protection for RTC registers */ __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); /* Enable WAKE UP TIMER interrupt */ __HAL_RTC_WAKEUPTIMER_ENABLE_IT(&hRTC_Handle, RTC_IT_WUT); /* Enable the write protection for RTC registers */ __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); } /** * @brief Wake Up Timer Event Callback in non blocking mode * @note This function is called when RTC_WKUP interrupt took place, inside * RTC_WKUP_IRQHandler(). It makes a direct call to HAL_IncTick() to increment * a global variable "uwTick" used as application time base. * @param hrtc RTC handle * @retval None */ void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc) { HAL_IncTick(); } /** * @brief This function handles WAKE UP TIMER interrupt request. * @retval None */ void RTC_WKUP_IRQHandler(void) { HAL_RTCEx_WakeUpTimerIRQHandler(&hRTC_Handle); } /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/