Mercurial > public > ostc4
view Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_timebase_tim_template.c @ 263:a6c0375bc950 IPC_Sync_Improvment_2
Forward 100ms time stamp to RTE and handle logbook in main loop
Because of code execution variance between 100ms cycle event and start of SPI communication, the synchronization between Main and RTE may shift. To avoid these shifts the time stamp of the 100ms event is forwarded to the RTE which is now able to adapt to small variations.
One variation point was the storage of dive samples within the external flash. Taking a closer look how this function works, moving it from the timer callback to the main loop should not be an issue.
A critical point of having the function in the timer call back was the sector clean function which is called (depending on dive data) every ~300minutes and may take 250ms - 1500ms.
author | ideenmodellierer |
---|---|
date | Sun, 14 Apr 2019 11:38:14 +0200 |
parents | c78bcbd5deda |
children |
line wrap: on
line source
/** ****************************************************************************** * @file stm32f4xx_hal_timebase_tim_template.c * @author MCD Application Team * @brief HAL time base based on the hardware TIM Template. * * This file overrides the native HAL time base functions (defined as weak) * the TIM time base: * + Intializes the TIM peripheral generate a Period elapsed Event each 1ms * + HAL_IncTick is called inside HAL_TIM_PeriodElapsedCallback ie each 1ms * ****************************************************************************** * @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 * @{ */ /** @addtogroup HAL_TimeBase_TIM * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ TIM_HandleTypeDef TimHandle; /* Private function prototypes -----------------------------------------------*/ void TIM6_DAC_IRQHandler(void); /* Private functions ---------------------------------------------------------*/ /** * @brief This function configures the TIM6 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) { RCC_ClkInitTypeDef clkconfig; uint32_t uwTimclock, uwAPB1Prescaler = 0U; uint32_t uwPrescalerValue = 0U; uint32_t pFLatency; /*Configure the TIM6 IRQ priority */ HAL_NVIC_SetPriority(TIM6_DAC_IRQn, TickPriority ,0U); /* Enable the TIM6 global Interrupt */ HAL_NVIC_EnableIRQ(TIM6_DAC_IRQn); /* Enable TIM6 clock */ __HAL_RCC_TIM6_CLK_ENABLE(); /* Get clock configuration */ HAL_RCC_GetClockConfig(&clkconfig, &pFLatency); /* Get APB1 prescaler */ uwAPB1Prescaler = clkconfig.APB1CLKDivider; /* Compute TIM6 clock */ if (uwAPB1Prescaler == RCC_HCLK_DIV1) { uwTimclock = HAL_RCC_GetPCLK1Freq(); } else { uwTimclock = 2*HAL_RCC_GetPCLK1Freq(); } /* Compute the prescaler value to have TIM6 counter clock equal to 1MHz */ uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U); /* Initialize TIM6 */ TimHandle.Instance = TIM6; /* Initialize TIMx peripheral as follow: + Period = [(TIM6CLK/1000) - 1]. to have a (1/1000) s time base. + Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock. + ClockDivision = 0 + Counter direction = Up */ TimHandle.Init.Period = (1000000U / 1000U) - 1U; TimHandle.Init.Prescaler = uwPrescalerValue; TimHandle.Init.ClockDivision = 0U; TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP; if(HAL_TIM_Base_Init(&TimHandle) == HAL_OK) { /* Start the TIM time Base generation in interrupt mode */ return HAL_TIM_Base_Start_IT(&TimHandle); } /* Return function status */ return HAL_ERROR; } /** * @brief Suspend Tick increment. * @note Disable the tick increment by disabling TIM6 update interrupt. * @retval None */ void HAL_SuspendTick(void) { /* Disable TIM6 update Interrupt */ __HAL_TIM_DISABLE_IT(&TimHandle, TIM_IT_UPDATE); } /** * @brief Resume Tick increment. * @note Enable the tick increment by Enabling TIM6 update interrupt. * @retval None */ void HAL_ResumeTick(void) { /* Enable TIM6 Update interrupt */ __HAL_TIM_ENABLE_IT(&TimHandle, TIM_IT_UPDATE); } /** * @brief Period elapsed callback in non blocking mode * @note This function is called when TIM6 interrupt took place, inside * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment * a global variable "uwTick" used as application time base. * @param htim TIM handle * @retval None */ void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) { HAL_IncTick(); } /** * @brief This function handles TIM interrupt request. * @retval None */ void TIM6_DAC_IRQHandler(void) { HAL_TIM_IRQHandler(&TimHandle); } /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/