| /** |
| ****************************************************************************** |
| * @file stm32l5xx_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: |
| * + Initializes the RTC peripheral and configures the wakeup timer to be |
| * incremented each 1ms when uwTickFreq is set to default value, else |
| * 10 ms or 100 ms, depending of above global variable value. |
| * + HAL_IncTick is called inside the HAL_RTCEx_WakeUpTimerEventCallback |
| * + HSE (default), LSE or LSI can be selected as RTC clock source |
| * |
| ****************************************************************************** |
| * @attention |
| * |
| * Copyright (c) 2019 STMicroelectronics. |
| * All rights reserved. |
| * |
| * This software is licensed under terms that can be found in the LICENSE file |
| * in the root directory of this software component. |
| * If no LICENSE file comes with this software, it is provided AS-IS. |
| * |
| ****************************************************************************** |
| @verbatim |
| ============================================================================== |
| ##### How to use this driver ##### |
| ============================================================================== |
| [..] |
| This file must be copied to the application folder and modified as follows: |
| (#) Rename it to 'stm32l5xx_hal_timebase_rtc_wakeup.c' |
| (#) Add this file and the RTC HAL drivers to your project and uncomment |
| HAL_RTC_MODULE_ENABLED define in stm32l5xx_hal_conf.h |
| |
| @endverbatim |
| ****************************************************************************** |
| */ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32l5xx_hal.h" |
| |
| /** @addtogroup STM32L5xx_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 4U |
| #else /* RTC_CLOCK_SOURCE_LSE || RTC_CLOCK_SOURCE_LSI */ |
| #define RTC_ASYNCH_PREDIV 31U |
| #define RTC_SYNCH_PREDIV 0U |
| #endif /* RTC_CLOCK_SOURCE_HSE */ |
| |
| /* Private macro -------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| RTC_HandleTypeDef hRTC_Handle = {.Init = {0}}; |
| |
| /* Private function prototypes -----------------------------------------------*/ |
| void RTC_IRQHandler(void); |
| |
| /* Private functions ---------------------------------------------------------*/ |
| |
| /** |
| * @brief This function configures the RTC wakeup timer 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) |
| { |
| HAL_StatusTypeDef status; |
| __IO uint32_t counter = 0U; |
| |
| RCC_OscInitTypeDef RCC_OscInitStruct; |
| RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; |
| |
| |
| /* Check uwTickFreq for MisraC 2012 (even if uwTickFreq is a enum type that don't take the value zero)*/ |
| if ((uint32_t)uwTickFreq != 0U) |
| { |
| #ifdef RTC_CLOCK_SOURCE_LSE |
| /* Configure LSE as RTC clock source */ |
| RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; |
| RCC_OscInitStruct.LSEState = RCC_LSE_ON_RTC_ONLY; |
| RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
| |
| PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; |
| #elif defined (RTC_CLOCK_SOURCE_LSI) |
| /* Configure LSI as RTC clock source */ |
| RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI; |
| RCC_OscInitStruct.LSIState = RCC_LSI_ON; |
| RCC_OscInitStruct.LSIDiv = RCC_LSI_DIV1; |
| RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
| |
| PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; |
| #elif defined (RTC_CLOCK_SOURCE_HSE) |
| /* Configure HSE as RTC clock source */ |
| RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; |
| RCC_OscInitStruct.HSEState = RCC_HSE_ON; |
| RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
| |
| PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_HSE_DIV32; |
| #else |
| #error Please select the RTC Clock source |
| #endif /* RTC_CLOCK_SOURCE_LSE */ |
| |
| status = HAL_RCC_OscConfig(&RCC_OscInitStruct); |
| if(status == HAL_OK) |
| { |
| PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; |
| status = HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct); |
| |
| /* Enable RTC Clock */ |
| if(status == HAL_OK) |
| { |
| /* Enable RTC Clock */ |
| __HAL_RCC_RTC_ENABLE(); |
| __HAL_RCC_RTCAPB_CLK_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) * (4 + 1)) / 500kHz |
| = 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; |
| status = HAL_RTC_Init(&hRTC_Handle); |
| if(status == HAL_OK) |
| { |
| /* 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) == 0U) |
| { |
| counter++; |
| if (counter == (SystemCoreClock / 56U)) |
| { |
| status = HAL_ERROR; |
| break; |
| } |
| } |
| |
| if(status == HAL_OK) |
| { |
| /* 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(); |
| |
| /* 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_EnableIRQ(RTC_IRQn); |
| |
| /* Configure the SysTick IRQ priority */ |
| if (TickPriority < (1UL << __NVIC_PRIO_BITS)) |
| { |
| HAL_NVIC_SetPriority(RTC_IRQn, TickPriority, 0U); |
| uwTickPrio = TickPriority; |
| } |
| else |
| { |
| status = HAL_ERROR; |
| } |
| } |
| } |
| } |
| } |
| } |
| else |
| { |
| status = HAL_ERROR; |
| } |
| return status; |
| } |
| |
| /** |
| * @brief Suspend Tick increment. |
| * @note Disable the tick increment by disabling RTC interrupt. |
| * @retval None |
| */ |
| void HAL_SuspendTick(void) |
| { |
| /* Disable the write protection for RTC registers */ |
| __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
| /* Disable RTC 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 interrupt. |
| * @retval None |
| */ |
| void HAL_ResumeTick(void) |
| { |
| /* Disable the write protection for RTC registers */ |
| __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
| /* Enable RTC 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 interrupt took place, inside |
| * RTC_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) |
| { |
| /* Prevent unused argument(s) compilation warning */ |
| UNUSED(hrtc); |
| |
| HAL_IncTick(); |
| } |
| |
| /** |
| * @brief This function handles RTC WAKE UP TIMER interrupt request. |
| * @retval None |
| */ |
| void RTC_IRQHandler(void) |
| { |
| HAL_RTCEx_WakeUpTimerIRQHandler(&hRTC_Handle); |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| |
