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/** |
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****************************************************************************** |
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* @file stm32f0xx_hal_timebase_rtc_alarm_template.c |
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* @brief HAL time base based on the hardware RTC_ALARM Template. |
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* |
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* This file override the native HAL time base functions (defined as weak) |
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* to use the RTC ALARM for time base generation: |
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* + Intializes the RTC peripheral to increment the seconds registers each 1ms |
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* + The alarm is configured to assert an interrupt when the RTC reaches 1ms |
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* + HAL_IncTick is called at each Alarm event and the time is reset to 00:00:00 |
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* + HSE (default), LSE or LSI can be selected as RTC clock source |
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@verbatim |
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============================================================================== |
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##### How to use this driver ##### |
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============================================================================== |
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[..] |
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This file must be copied to the application folder and modified as follows: |
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(#) Rename it to 'stm32f0xx_hal_timebase_rtc_alarm.c' |
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(#) Add this file and the RTC HAL drivers to your project and uncomment |
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HAL_RTC_MODULE_ENABLED define in stm32f0xx_hal_conf.h |
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[..] |
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(@) HAL RTC alarm and HAL RTC wakeup drivers can抰 be used with low power modes: |
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The wake up capability of the RTC may be intrusive in case of prior low power mode |
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configuration requiring different wake up sources. |
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Application/Example behavior is no more guaranteed |
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(@) The stm32f0xx_hal_timebase_tim use is recommended for the Applications/Examples |
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requiring low power modes |
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@endverbatim |
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****************************************************************************** |
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* @attention |
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* |
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> |
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* |
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* Redistribution and use in source and binary forms, with or without modification, |
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* are permitted provided that the following conditions are met: |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* 3. Neither the name of STMicroelectronics nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************** |
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*/ |
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/* Includes ------------------------------------------------------------------*/ |
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#include "stm32f0xx_hal.h" |
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/** @addtogroup STM32F0xx_HAL_Driver |
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* @{ |
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*/ |
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/** @defgroup HAL_TimeBase_RTC_Alarm_Template HAL TimeBase RTC Alarm Template |
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* @{ |
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*/ |
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/* Private typedef -----------------------------------------------------------*/ |
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/* Private define ------------------------------------------------------------*/ |
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/* Uncomment the line below to select the appropriate RTC Clock source for your application: |
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+ RTC_CLOCK_SOURCE_HSE: can be selected for applications requiring timing precision. |
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+ RTC_CLOCK_SOURCE_LSE: can be selected for applications with low constraint on timing |
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precision. |
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+ RTC_CLOCK_SOURCE_LSI: can be selected for applications with low constraint on timing |
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precision. |
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*/ |
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#define RTC_CLOCK_SOURCE_HSE |
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/* #define RTC_CLOCK_SOURCE_LSE */ |
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/* #define RTC_CLOCK_SOURCE_LSI */ |
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#if defined(RTC_CLOCK_SOURCE_HSE) |
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#define RTC_ASYNCH_PREDIV 49U |
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#define RTC_SYNCH_PREDIV 4U |
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#elif defined(RTC_CLOCK_SOURCE_LSE) |
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#define RTC_ASYNCH_PREDIV 0U |
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#define RTC_SYNCH_PREDIV 31U |
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#else /* CLOCK_SOURCE_LSI */ |
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#define RTC_ASYNCH_PREDIV 0U |
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#define RTC_SYNCH_PREDIV 39U |
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#endif /* RTC_CLOCK_SOURCE_HSE */ |
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/* Private macro -------------------------------------------------------------*/ |
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/* Private variables ---------------------------------------------------------*/ |
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RTC_HandleTypeDef hRTC_Handle; |
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/* Private function prototypes -----------------------------------------------*/ |
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void RTC_IRQHandler(void); |
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/* Private functions ---------------------------------------------------------*/ |
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/** |
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* @brief This function configures the RTC_ALARMA as a time base source. |
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* The time source is configured to have 1ms time base with a dedicated |
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* Tick interrupt priority. |
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* @note This function is called automatically at the beginning of program after |
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* reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig(). |
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* @param TickPriority Tick interrupt priority. |
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* @retval HAL status |
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*/ |
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HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority) |
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{ |
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__IO uint32_t counter = 0U; |
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RCC_OscInitTypeDef RCC_OscInitStruct; |
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RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; |
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#ifdef RTC_CLOCK_SOURCE_LSE |
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/* Configue LSE as RTC clock soucre */ |
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; |
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
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RCC_OscInitStruct.LSEState = RCC_LSE_ON; |
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PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; |
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#elif defined (RTC_CLOCK_SOURCE_LSI) |
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/* Configue LSI as RTC clock soucre */ |
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI; |
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
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RCC_OscInitStruct.LSIState = RCC_LSI_ON; |
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PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; |
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#elif defined (RTC_CLOCK_SOURCE_HSE) |
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/* Configue HSE as RTC clock soucre */ |
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; |
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
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RCC_OscInitStruct.HSEState = RCC_HSE_ON; |
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PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_HSE_DIV32; |
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#else |
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#error Please select the RTC Clock source |
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#endif /* RTC_CLOCK_SOURCE_LSE */ |
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if(HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) |
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{ |
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PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; |
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if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) == HAL_OK) |
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{ |
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/* Enable RTC Clock */ |
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__HAL_RCC_RTC_ENABLE(); |
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/* The time base should be 1ms |
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Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK |
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HSE/32 as RTC clock and HSE 8MHz |
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Time base = ((49 + 1) * (4 + 1)) / 250kHz |
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= 1ms |
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LSE as RTC clock |
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Time base = ((31 + 1) * (0 + 1)) / 32.768KHz |
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= ~1ms |
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LSI as RTC clock |
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Time base = ((39 + 1) * (0 + 1)) / 40KHz |
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= 1ms |
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*/ |
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hRTC_Handle.Instance = RTC; |
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hRTC_Handle.Init.HourFormat = RTC_HOURFORMAT_24; |
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hRTC_Handle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV; |
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hRTC_Handle.Init.SynchPrediv = RTC_SYNCH_PREDIV; |
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hRTC_Handle.Init.OutPut = RTC_OUTPUT_DISABLE; |
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hRTC_Handle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; |
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hRTC_Handle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; |
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HAL_RTC_Init(&hRTC_Handle); |
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/* Disable the write protection for RTC registers */ |
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__HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
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/* Disable the Alarm A interrupt */ |
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__HAL_RTC_ALARMA_DISABLE(&hRTC_Handle); |
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/* Clear flag alarm A */ |
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__HAL_RTC_ALARM_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_ALRAF); |
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counter = 0U; |
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/* Wait till RTC ALRAWF flag is set and if Time out is reached exit */ |
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while(__HAL_RTC_ALARM_GET_FLAG(&hRTC_Handle, RTC_FLAG_ALRAWF) == RESET) |
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{ |
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if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */ |
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{ |
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return HAL_ERROR; |
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} |
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} |
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hRTC_Handle.Instance->ALRMAR = 0x01U; |
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/* Configure the Alarm state: Enable Alarm */ |
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__HAL_RTC_ALARMA_ENABLE(&hRTC_Handle); |
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/* Configure the Alarm interrupt */ |
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__HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA); |
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/* RTC Alarm Interrupt Configuration: EXTI configuration */ |
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__HAL_RTC_ALARM_EXTI_ENABLE_IT(); |
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__HAL_RTC_ALARM_EXTI_ENABLE_RISING_EDGE(); |
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/* Check if the Initialization mode is set */ |
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if((hRTC_Handle.Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET) |
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{ |
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/* Set the Initialization mode */ |
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hRTC_Handle.Instance->ISR = (uint32_t)RTC_INIT_MASK; |
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counter = 0U; |
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while((hRTC_Handle.Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET) |
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{ |
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if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */ |
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{ |
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return HAL_ERROR; |
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} |
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} |
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} |
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hRTC_Handle.Instance->DR = 0U; |
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hRTC_Handle.Instance->TR = 0U; |
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hRTC_Handle.Instance->ISR &= (uint32_t)~RTC_ISR_INIT; |
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/* Enable the write protection for RTC registers */ |
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__HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); |
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HAL_NVIC_SetPriority(RTC_IRQn, TickPriority, 0U); |
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HAL_NVIC_EnableIRQ(RTC_IRQn); |
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return HAL_OK; |
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} |
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} |
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return HAL_ERROR; |
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} |
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/** |
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* @brief Suspend Tick increment. |
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* @note Disable the tick increment by disabling RTC ALARM interrupt. |
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* @param None |
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* @retval None |
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*/ |
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void HAL_SuspendTick(void) |
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{ |
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/* Disable the write protection for RTC registers */ |
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__HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
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/* Disable RTC ALARM update Interrupt */ |
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__HAL_RTC_ALARM_DISABLE_IT(&hRTC_Handle, RTC_IT_ALRA); |
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/* Enable the write protection for RTC registers */ |
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__HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); |
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} |
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/** |
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* @brief Resume Tick increment. |
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* @note Enable the tick increment by Enabling RTC ALARM interrupt. |
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* @param None |
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* @retval None |
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*/ |
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void HAL_ResumeTick(void) |
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{ |
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/* Disable the write protection for RTC registers */ |
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__HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
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/* Enable RTC ALARM Update interrupt */ |
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__HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA); |
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/* Enable the write protection for RTC registers */ |
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__HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); |
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} |
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/** |
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* @brief ALARM A Event Callback in non blocking mode |
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* @note This function is called when RTC_ALARM interrupt took place, inside |
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* RTC_IRQHandler(). It makes a direct call to HAL_IncTick() to increment |
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* a global variable "uwTick" used as application time base. |
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* @param hrtc RTC handle |
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* @retval None |
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*/ |
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void HAL_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc) |
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{ |
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__IO uint32_t counter = 0U; |
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HAL_IncTick(); |
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__HAL_RTC_WRITEPROTECTION_DISABLE(hrtc); |
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/* Set the Initialization mode */ |
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hrtc->Instance->ISR = (uint32_t)RTC_INIT_MASK; |
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while((hrtc->Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET) |
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{ |
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if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */ |
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{ |
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break; |
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} |
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} |
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hrtc->Instance->DR = 0U; |
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hrtc->Instance->TR = 0U; |
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hrtc->Instance->ISR &= (uint32_t)~RTC_ISR_INIT; |
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/* Enable the write protection for RTC registers */ |
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__HAL_RTC_WRITEPROTECTION_ENABLE(hrtc); |
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} |
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/** |
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* @brief This function handles RTC ALARM interrupt request. |
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* @param None |
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* @retval None |
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*/ |
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void RTC_IRQHandler(void) |
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{ |
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HAL_RTC_AlarmIRQHandler(&hRTC_Handle); |
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} |
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/** |
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* @} |
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*/ |
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/** |
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* @} |
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*/ |
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |