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| bfc108 | 1 | /** |
| Q | 2 | ****************************************************************************** |
| 3 | * @file stm32f0xx_hal_timebase_tim_template.c | |
| 4 | * @brief HAL time base based on the hardware TIM Template. | |
| 5 | * | |
| 6 | * This file override the native HAL time base functions (defined as weak) | |
| 7 | * the TIM time base: | |
| 8 | * + Intializes the TIM peripheral generate a Period elapsed Event each 1ms | |
| 9 | * + HAL_IncTick is called inside HAL_TIM_PeriodElapsedCallback ie each 1ms | |
| 10 | * | |
| 11 | ****************************************************************************** | |
| 12 | * @attention | |
| 13 | * | |
| 14 | * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> | |
| 15 | * | |
| 16 | * Redistribution and use in source and binary forms, with or without modification, | |
| 17 | * are permitted provided that the following conditions are met: | |
| 18 | * 1. Redistributions of source code must retain the above copyright notice, | |
| 19 | * this list of conditions and the following disclaimer. | |
| 20 | * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 21 | * this list of conditions and the following disclaimer in the documentation | |
| 22 | * and/or other materials provided with the distribution. | |
| 23 | * 3. Neither the name of STMicroelectronics nor the names of its contributors | |
| 24 | * may be used to endorse or promote products derived from this software | |
| 25 | * without specific prior written permission. | |
| 26 | * | |
| 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 28 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 30 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
| 31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 33 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
| 34 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
| 35 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 36 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 37 | * | |
| 38 | ****************************************************************************** | |
| 39 | */ | |
| 40 | ||
| 41 | /* Includes ------------------------------------------------------------------*/ | |
| 42 | #include "stm32f0xx_hal.h" | |
| 43 | ||
| 44 | /** @addtogroup STM32F0xx_HAL_Driver | |
| 45 | * @{ | |
| 46 | */ | |
| 47 | ||
| 48 | /** @addtogroup HAL_TimeBase_TIM | |
| 49 | * @{ | |
| 50 | */ | |
| 51 | ||
| 52 | /* Private typedef -----------------------------------------------------------*/ | |
| 53 | /* Private define ------------------------------------------------------------*/ | |
| 54 | /* Private macro -------------------------------------------------------------*/ | |
| 55 | /* Private variables ---------------------------------------------------------*/ | |
| 56 | TIM_HandleTypeDef TimHandle; | |
| 57 | /* Private function prototypes -----------------------------------------------*/ | |
| 58 | void TIM6_DAC_IRQHandler(void); | |
| 59 | /* Private functions ---------------------------------------------------------*/ | |
| 60 | ||
| 61 | /** | |
| 62 | * @brief This function configures the TIM6 as a time base source. | |
| 63 | * The time source is configured to have 1ms time base with a dedicated | |
| 64 | * Tick interrupt priority. | |
| 65 | * @note This function is called automatically at the beginning of program after | |
| 66 | * reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig(). | |
| 67 | * @param TickPriority Tick interrupt priority. | |
| 68 | * @retval HAL status | |
| 69 | */ | |
| 70 | HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority) | |
| 71 | { | |
| 72 | RCC_ClkInitTypeDef clkconfig; | |
| 73 | uint32_t uwTimclock, uwAPB1Prescaler = 0U; | |
| 74 | uint32_t uwPrescalerValue = 0U; | |
| 75 | uint32_t pFLatency; | |
| 76 | ||
| 77 | /*Configure the TIM6 IRQ priority */ | |
| 78 | HAL_NVIC_SetPriority(TIM6_DAC_IRQn, TickPriority ,0U); | |
| 79 | ||
| 80 | /* Enable the TIM6 global Interrupt */ | |
| 81 | HAL_NVIC_EnableIRQ(TIM6_DAC_IRQn); | |
| 82 | ||
| 83 | /* Enable TIM6 clock */ | |
| 84 | __HAL_RCC_TIM6_CLK_ENABLE(); | |
| 85 | ||
| 86 | /* Get clock configuration */ | |
| 87 | HAL_RCC_GetClockConfig(&clkconfig, &pFLatency); | |
| 88 | ||
| 89 | /* Get APB1 prescaler */ | |
| 90 | uwAPB1Prescaler = clkconfig.APB1CLKDivider; | |
| 91 | ||
| 92 | /* Compute TIM6 clock */ | |
| 93 | if (uwAPB1Prescaler == RCC_HCLK_DIV1) | |
| 94 | { | |
| 95 | uwTimclock = HAL_RCC_GetPCLK1Freq(); | |
| 96 | } | |
| 97 | else | |
| 98 | { | |
| 99 | uwTimclock = 2*HAL_RCC_GetPCLK1Freq(); | |
| 100 | } | |
| 101 | ||
| 102 | /* Compute the prescaler value to have TIM6 counter clock equal to 1MHz */ | |
| 103 | uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U); | |
| 104 | ||
| 105 | /* Initialize TIM6 */ | |
| 106 | TimHandle.Instance = TIM6; | |
| 107 | ||
| 108 | /* Initialize TIMx peripheral as follow: | |
| 109 | + Period = [(TIM6CLK/1000) - 1]. to have a (1/1000) s time base. | |
| 110 | + Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock. | |
| 111 | + ClockDivision = 0 | |
| 112 | + Counter direction = Up | |
| 113 | */ | |
| 114 | TimHandle.Init.Period = (1000000U / 1000U) - 1U; | |
| 115 | TimHandle.Init.Prescaler = uwPrescalerValue; | |
| 116 | TimHandle.Init.ClockDivision = 0U; | |
| 117 | TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP; | |
| 118 | TimHandle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; | |
| 119 | if(HAL_TIM_Base_Init(&TimHandle) == HAL_OK) | |
| 120 | { | |
| 121 | /* Start the TIM time Base generation in interrupt mode */ | |
| 122 | return HAL_TIM_Base_Start_IT(&TimHandle); | |
| 123 | } | |
| 124 | ||
| 125 | /* Return function status */ | |
| 126 | return HAL_ERROR; | |
| 127 | } | |
| 128 | ||
| 129 | /** | |
| 130 | * @brief Suspend Tick increment. | |
| 131 | * @note Disable the tick increment by disabling TIM6 update interrupt. | |
| 132 | * @param None | |
| 133 | * @retval None | |
| 134 | */ | |
| 135 | void HAL_SuspendTick(void) | |
| 136 | { | |
| 137 | /* Disable TIM6 update Interrupt */ | |
| 138 | __HAL_TIM_DISABLE_IT(&TimHandle, TIM_IT_UPDATE); | |
| 139 | } | |
| 140 | ||
| 141 | /** | |
| 142 | * @brief Resume Tick increment. | |
| 143 | * @note Enable the tick increment by Enabling TIM6 update interrupt. | |
| 144 | * @param None | |
| 145 | * @retval None | |
| 146 | */ | |
| 147 | void HAL_ResumeTick(void) | |
| 148 | { | |
| 149 | /* Enable TIM6 Update interrupt */ | |
| 150 | __HAL_TIM_ENABLE_IT(&TimHandle, TIM_IT_UPDATE); | |
| 151 | } | |
| 152 | ||
| 153 | /** | |
| 154 | * @brief Period elapsed callback in non blocking mode | |
| 155 | * @note This function is called when TIM6 interrupt took place, inside | |
| 156 | * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment | |
| 157 | * a global variable "uwTick" used as application time base. | |
| 158 | * @param htim TIM handle | |
| 159 | * @retval None | |
| 160 | */ | |
| 161 | void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) | |
| 162 | { | |
| 163 | HAL_IncTick(); | |
| 164 | } | |
| 165 | ||
| 166 | /** | |
| 167 | * @brief This function handles TIM interrupt request. | |
| 168 | * @param None | |
| 169 | * @retval None | |
| 170 | */ | |
| 171 | void TIM6_DAC_IRQHandler(void) | |
| 172 | { | |
| 173 | HAL_TIM_IRQHandler(&TimHandle); | |
| 174 | } | |
| 175 | ||
| 176 | /** | |
| 177 | * @} | |
| 178 | */ | |
| 179 | ||
| 180 | /** | |
| 181 | * @} | |
| 182 | */ | |
| 183 | ||
| 184 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ | |
