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Diffstat (limited to '')
| -rw-r--r-- | bsps/arm/stm32h7/hal/stm32h7xx_hal_timebase_tim_template.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/bsps/arm/stm32h7/hal/stm32h7xx_hal_timebase_tim_template.c b/bsps/arm/stm32h7/hal/stm32h7xx_hal_timebase_tim_template.c new file mode 100644 index 0000000000..9353743053 --- /dev/null +++ b/bsps/arm/stm32h7/hal/stm32h7xx_hal_timebase_tim_template.c @@ -0,0 +1,178 @@ +/** + ****************************************************************************** + * @file stm32h7xx_hal_timebase_tim_template.c + * @author MCD Application Team + * @brief HAL time base based on the hardware TIM. + * + * This file overrides the native HAL time base functions (defined as weak) + * the TIM time base: + * + Initializes the TIM peripheral generate a Period elapsed Event each 1ms + * + HAL_IncTick is called inside HAL_TIM_PeriodElapsedCallback ie each 1ms + * + ****************************************************************************** + * @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_tim.c' + (#) Add this file and the TIM HAL drivers to your project and uncomment + HAL_TIM_MODULE_ENABLED define in stm32h7xx_hal_conf.h + + @endverbatim + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32h7xx_hal.h" + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +static 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; + uint32_t uwPrescalerValue; + uint32_t pFLatency; + HAL_StatusTypeDef status; + + /* 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 = 2UL * 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; + status = HAL_TIM_Base_Init(&TimHandle); + if (status == HAL_OK) + { + /* Start the TIM time Base generation in interrupt mode */ + status = HAL_TIM_Base_Start_IT(&TimHandle); + if (status == HAL_OK) + { + /* Enable the TIM6 global Interrupt */ + HAL_NVIC_EnableIRQ(TIM6_DAC_IRQn); + + if (TickPriority < (1UL << __NVIC_PRIO_BITS)) + { + /* Enable the TIM6 global Interrupt */ + HAL_NVIC_SetPriority(TIM6_DAC_IRQn, TickPriority, 0); + uwTickPrio = TickPriority; + } + else + { + status = HAL_ERROR; + } + } +} + + /* Return function status */ + return status; +} + +/** + * @brief Suspend Tick increment. + * @note Disable the tick increment by disabling TIM6 update interrupt. + * @param None + * @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. + * @param None + * @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) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(htim); + + HAL_IncTick(); +} + +/** + * @brief This function handles TIM interrupt request. + * @param None + * @retval None + */ +void TIM6_DAC_IRQHandler(void) +{ + HAL_TIM_IRQHandler(&TimHandle); +} + + |