| /** |
| ****************************************************************************** |
| * @file stm32f1xx_hal_timebase_rtc_alarm_template.c |
| * @author MCD Application Team |
| * @brief HAL time base based on the hardware RTC_ALARM. |
| * |
| * This file override the native HAL time base functions (defined as weak) |
| * to use the RTC ALARM for time base generation: |
| * + Intializes the RTC peripheral to increment the seconds registers each 1ms |
| * + The alarm is configured to assert an interrupt when the RTC reaches 1ms |
| * + HAL_IncTick is called at each Alarm event and the time is reset to 00:00:00 |
| * + HSE (default), LSE or LSI can be selected as RTC clock source |
| * |
| ****************************************************************************** |
| * @attention |
| * |
| * Copyright (c) 2017 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 'stm32f1xx_hal_timebase_rtc_alarm.c' |
| (#) Add this file and the RTC HAL drivers to your project and uncomment |
| HAL_RTC_MODULE_ENABLED define in stm32f1xx_hal_conf.h |
| |
| [..] |
| (@) HAL RTC alarm and HAL RTC wakeup drivers cant 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 stm32f1xx_hal_timebase_tim use is recommended for the Applications/Examples |
| requiring low power modes |
| |
| @endverbatim |
| ****************************************************************************** |
| */ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32f1xx_hal.h" |
| /** @addtogroup STM32F1xx_HAL_Driver |
| * @{ |
| */ |
| |
| /** @defgroup HAL_TimeBase_RTC_Alarm_Template HAL TimeBase RTC Alarm 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 */ |
| |
| /* Private macro -------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| RTC_HandleTypeDef hRTC_Handle; |
| /* Private function prototypes -----------------------------------------------*/ |
| void RTC_Alarm_IRQHandler(void); |
| /* Private functions ---------------------------------------------------------*/ |
| |
| /** |
| * @brief This function configures the RTC_ALARMA as a time base source. |
| * The time source is configured to have 1ms time base with a dedicated |
| * Tick interrupt priority. |
| * @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; |
| HAL_StatusTypeDef status; |
| |
| #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; |
| PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_HSE_DIV128; |
| #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); |
| if (status == HAL_OK) |
| { |
| /* Enable RTC Clock */ |
| __HAL_RCC_RTC_ENABLE(); |
| |
| /* Configure RTC time base to 10Khz */ |
| hRTC_Handle.Instance = RTC; |
| hRTC_Handle.Init.AsynchPrediv = (HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_RTC) / 10000) - 1; |
| hRTC_Handle.Init.OutPut = RTC_OUTPUTSOURCE_NONE; |
| status = HAL_RTC_Init(&hRTC_Handle); |
| } |
| } |
| if (status == HAL_OK) |
| { |
| /* Disable the write protection for RTC registers */ |
| __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
| |
| /* Clear flag alarm A */ |
| __HAL_RTC_ALARM_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_ALRAF); |
| |
| counter = 0U; |
| /* Wait till RTC ALRAF flag is set and if Time out is reached exit */ |
| while (__HAL_RTC_ALARM_GET_FLAG(&hRTC_Handle, RTC_FLAG_ALRAF) != RESET) |
| { |
| if (counter++ == SystemCoreClock / 48U) /* Timeout = ~ 1s */ |
| { |
| status = HAL_ERROR; |
| } |
| } |
| } |
| if (status == HAL_OK) |
| { |
| /* Set RTC COUNTER MSB word */ |
| hRTC_Handle.Instance->ALRH = 0x00U; |
| /* Set RTC COUNTER LSB word */ |
| hRTC_Handle.Instance->ALRL = 0x09U; |
| |
| /* RTC Alarm Interrupt Configuration: EXTI configuration */ |
| __HAL_RTC_ALARM_EXTI_ENABLE_IT(); |
| __HAL_RTC_ALARM_EXTI_ENABLE_RISING_EDGE(); |
| |
| /* Clear Second and overflow flags */ |
| CLEAR_BIT(hRTC_Handle.Instance->CRL, (RTC_FLAG_SEC | RTC_FLAG_OW)); |
| |
| /* Set RTC COUNTER MSB word */ |
| hRTC_Handle.Instance->CNTH = 0x00U; |
| /* Set RTC COUNTER LSB word */ |
| hRTC_Handle.Instance->CNTL = 0x00U; |
| |
| /* Configure the Alarm interrupt */ |
| __HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA); |
| |
| /* Enable the write protection for RTC registers */ |
| __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); |
| |
| /* Wait till RTC is in INIT state and if Time out is reached exit */ |
| counter = 0U; |
| while ((hRTC_Handle.Instance->CRL & RTC_CRL_RTOFF) == (uint32_t)RESET) |
| { |
| if (counter++ == SystemCoreClock / 48U) /* Timeout = ~ 1s */ |
| { |
| status = HAL_ERROR; |
| } |
| } |
| } |
| if (status == HAL_OK) |
| { |
| /* Enable the RTC global Interrupt */ |
| HAL_NVIC_EnableIRQ(RTC_Alarm_IRQn); |
| |
| /* Configure the SysTick IRQ priority */ |
| if (TickPriority < (1UL << __NVIC_PRIO_BITS)) |
| { |
| HAL_NVIC_SetPriority(RTC_Alarm_IRQn, TickPriority ,0U); |
| uwTickPrio = TickPriority; |
| } |
| else |
| { |
| status = HAL_ERROR; |
| } |
| } |
| |
| return status; |
| } |
| |
| /** |
| * @brief Suspend Tick increment. |
| * @note Disable the tick increment by disabling RTC ALARM interrupt. |
| * @param None |
| * @retval None |
| */ |
| void HAL_SuspendTick(void) |
| { |
| /* Disable RTC ALARM update Interrupt */ |
| __HAL_RTC_ALARM_DISABLE_IT(&hRTC_Handle, RTC_IT_ALRA); |
| } |
| |
| /** |
| * @brief Resume Tick increment. |
| * @note Enable the tick increment by Enabling RTC ALARM interrupt. |
| * @param None |
| * @retval None |
| */ |
| void HAL_ResumeTick(void) |
| { |
| __IO uint32_t counter = 0U; |
| |
| /* Disable the write protection for RTC registers */ |
| __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
| |
| /* Set RTC COUNTER MSB word */ |
| hRTC_Handle.Instance->CNTH = 0x00U; |
| /* Set RTC COUNTER LSB word */ |
| hRTC_Handle.Instance->CNTL = 0x00U; |
| |
| /* Clear Second and overflow flags */ |
| CLEAR_BIT(hRTC_Handle.Instance->CRL, (RTC_FLAG_SEC | RTC_FLAG_OW | RTC_FLAG_ALRAF)); |
| |
| /* Enable RTC ALARM Update interrupt */ |
| __HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA); |
| |
| /* Enable the write protection for RTC registers */ |
| __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); |
| |
| /* Wait till RTC is in INIT state and if Time out is reached exit */ |
| while ((hRTC_Handle.Instance->CRL & RTC_CRL_RTOFF) == (uint32_t)RESET) |
| { |
| if (counter++ == SystemCoreClock / 48U) /* Timeout = ~ 1s */ |
| { |
| break; |
| } |
| } |
| } |
| |
| /** |
| * @brief ALARM A Event Callback in non blocking mode |
| * @note This function is called when RTC_ALARM interrupt took place, inside |
| * RTC_ALARM_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_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc) |
| { |
| __IO uint32_t counter = 0U; |
| |
| HAL_IncTick(); |
| |
| __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc); |
| |
| /* Set RTC COUNTER MSB word */ |
| WRITE_REG(hrtc->Instance->CNTH, 0x00U); |
| /* Set RTC COUNTER LSB word */ |
| WRITE_REG(hrtc->Instance->CNTL, 0x00U); |
| |
| /* Clear Second and overflow flags */ |
| CLEAR_BIT(hrtc->Instance->CRL, (RTC_FLAG_SEC | RTC_FLAG_OW)); |
| |
| /* Enable the write protection for RTC registers */ |
| __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc); |
| |
| /* Wait till RTC is in INIT state and if Time out is reached exit */ |
| while ((hrtc->Instance->CRL & RTC_CRL_RTOFF) == (uint32_t)RESET) |
| { |
| if (counter++ == SystemCoreClock / 48U) /* Timeout = ~ 1s */ |
| { |
| break; |
| } |
| } |
| } |
| |
| /** |
| * @brief This function handles RTC ALARM interrupt request. |
| * @retval None |
| */ |
| void RTC_Alarm_IRQHandler(void) |
| { |
| HAL_RTC_AlarmIRQHandler(&hRTC_Handle); |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| |