diff options
Diffstat (limited to '')
| -rw-r--r-- | bsps/arm/stm32h7/hal/stm32h7xx_hal_timebase_rtc_wakeup_template.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/bsps/arm/stm32h7/hal/stm32h7xx_hal_timebase_rtc_wakeup_template.c b/bsps/arm/stm32h7/hal/stm32h7xx_hal_timebase_rtc_wakeup_template.c new file mode 100644 index 0000000000..d11b6e020e --- /dev/null +++ b/bsps/arm/stm32h7/hal/stm32h7xx_hal_timebase_rtc_wakeup_template.c @@ -0,0 +1,301 @@ +/** + ****************************************************************************** + * @file stm32h7xx_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 + * + 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 + * + ****************************************************************************** + * @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 'stm32h7xx_hal_timebase_rtc_wakeup.c' + (#) Add this file and the RTC HAL drivers to your project and uncomment + HAL_RTC_MODULE_ENABLED define in stm32h7xx_hal_conf.h + + [..] + (@) HAL RTC alarm and HAL RTC wakeup drivers can not 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 stm32h7xx_hal_timebase_tim use is recommended for the Applications/Examples + requiring low power modes + + @endverbatim + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32h7xx_hal.h" +/** @addtogroup STM32H7xx_HAL_Driver + * @{ + */ + +/** @defgroup HAL_TimeBase_RTC_WakeUp_Template HAL TimeBase RTC WakeUp Template + * @ingroup RTEMSBSPsARMSTM32H7 + * @{ + */ + +/* 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) << 12U))) +#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 ---------------------------------------------------------*/ +static 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; + HAL_StatusTypeDef status; + +#ifdef RTC_CLOCK_SOURCE_LSE + /* Configure LSE as RTC clock source */ + 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) + /* Configure LSI as RTC clock source */ + 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) + /* Configure HSE as RTC clock source */ + 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 */ + + 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(); + /* 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; + 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 */ +#if defined(RTC_ICSR_WUTWF) + while (READ_BIT(hRTC_Handle.Instance->ICSR, RTC_FLAG_WUTWF) == (uint32_t)RESET) +#else + while (__HAL_RTC_WAKEUPTIMER_GET_FLAG(&hRTC_Handle, RTC_FLAG_WUTWF) == (uint32_t)RESET) +#endif /* RTC_ICSR_WUTWF */ + { + if (counter++ == (SystemCoreClock / 48U)) + { + status = HAL_ERROR; + } + } + } + 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 = (uint32_t)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); + + /* Enable the RTC global Interrupt */ + HAL_NVIC_EnableIRQ(RTC_WKUP_IRQn); + + /* Configure the SysTick IRQ priority */ + if (TickPriority < (1UL << __NVIC_PRIO_BITS)) + { + HAL_NVIC_SetPriority(RTC_WKUP_IRQn, TickPriority, 0U); + uwTickPrio = TickPriority; + } + else + { + status = HAL_ERROR; + } + } + return status; +} + +/** + * @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) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(hrtc); + + HAL_IncTick(); +} + +/** + * @brief This function handles WAKE UP TIMER interrupt request. + * @retval None + */ +void RTC_WKUP_IRQHandler(void) +{ + HAL_RTCEx_WakeUpTimerIRQHandler(&hRTC_Handle); +} + +/** + * @} + */ + +/** + * @} + */ + + |