PHung Tung / SRC_STM32F7

SPKT

Dependents:   WAV

targets/cmsis/TARGET_STM/TARGET_STM32F7/TARGET_NUCLEO_F746ZG/hal_tick.c@0:e87aa4c49e95, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 21:51:46 2019 +0000
Revision:
0:e87aa4c49e95
libray

Who changed what in which revision?

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phungductung 0:e87aa4c49e95 1 /**
phungductung 0:e87aa4c49e95 2 ******************************************************************************
phungductung 0:e87aa4c49e95 3 * @file hal_tick.c
phungductung 0:e87aa4c49e95 4 * @author MCD Application Team
phungductung 0:e87aa4c49e95 5 * @brief Initialization of HAL tick
phungductung 0:e87aa4c49e95 6 ******************************************************************************
phungductung 0:e87aa4c49e95 7 * @attention
phungductung 0:e87aa4c49e95 8 *
phungductung 0:e87aa4c49e95 9 * <h2><center>&copy; COPYRIGHT 2016 STMicroelectronics</center></h2>
phungductung 0:e87aa4c49e95 10 *
phungductung 0:e87aa4c49e95 11 * Redistribution and use in source and binary forms, with or without modification,
phungductung 0:e87aa4c49e95 12 * are permitted provided that the following conditions are met:
phungductung 0:e87aa4c49e95 13 * 1. Redistributions of source code must retain the above copyright notice,
phungductung 0:e87aa4c49e95 14 * this list of conditions and the following disclaimer.
phungductung 0:e87aa4c49e95 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
phungductung 0:e87aa4c49e95 16 * this list of conditions and the following disclaimer in the documentation
phungductung 0:e87aa4c49e95 17 * and/or other materials provided with the distribution.
phungductung 0:e87aa4c49e95 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
phungductung 0:e87aa4c49e95 19 * may be used to endorse or promote products derived from this software
phungductung 0:e87aa4c49e95 20 * without specific prior written permission.
phungductung 0:e87aa4c49e95 21 *
phungductung 0:e87aa4c49e95 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
phungductung 0:e87aa4c49e95 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
phungductung 0:e87aa4c49e95 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
phungductung 0:e87aa4c49e95 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
phungductung 0:e87aa4c49e95 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
phungductung 0:e87aa4c49e95 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
phungductung 0:e87aa4c49e95 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
phungductung 0:e87aa4c49e95 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
phungductung 0:e87aa4c49e95 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
phungductung 0:e87aa4c49e95 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
phungductung 0:e87aa4c49e95 32 *
phungductung 0:e87aa4c49e95 33 ******************************************************************************
phungductung 0:e87aa4c49e95 34 */
phungductung 0:e87aa4c49e95 35 #include "hal_tick.h"
phungductung 0:e87aa4c49e95 36
phungductung 0:e87aa4c49e95 37 // 0=NO, 1=PG6 toggles at each tick
phungductung 0:e87aa4c49e95 38 #define DEBUG_TICK 0
phungductung 0:e87aa4c49e95 39
phungductung 0:e87aa4c49e95 40 TIM_HandleTypeDef TimMasterHandle;
phungductung 0:e87aa4c49e95 41 uint32_t PreviousVal = 0;
phungductung 0:e87aa4c49e95 42
phungductung 0:e87aa4c49e95 43 void HAL_IncTick(void);
phungductung 0:e87aa4c49e95 44 void us_ticker_irq_handler(void);
phungductung 0:e87aa4c49e95 45
phungductung 0:e87aa4c49e95 46 void timer_irq_handler(void) {
phungductung 0:e87aa4c49e95 47 // Channel 1 for mbed timeout
phungductung 0:e87aa4c49e95 48 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
phungductung 0:e87aa4c49e95 49 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
phungductung 0:e87aa4c49e95 50 us_ticker_irq_handler();
phungductung 0:e87aa4c49e95 51 }
phungductung 0:e87aa4c49e95 52
phungductung 0:e87aa4c49e95 53 // Channel 2 for HAL tick
phungductung 0:e87aa4c49e95 54 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
phungductung 0:e87aa4c49e95 55 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
phungductung 0:e87aa4c49e95 56 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
phungductung 0:e87aa4c49e95 57 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
phungductung 0:e87aa4c49e95 58 // Increment HAL variable
phungductung 0:e87aa4c49e95 59 HAL_IncTick();
phungductung 0:e87aa4c49e95 60 // Prepare next interrupt
phungductung 0:e87aa4c49e95 61 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
phungductung 0:e87aa4c49e95 62 PreviousVal = val;
phungductung 0:e87aa4c49e95 63 #if DEBUG_TICK > 0
phungductung 0:e87aa4c49e95 64 HAL_GPIO_TogglePin(GPIOG, GPIO_PIN_6);
phungductung 0:e87aa4c49e95 65 #endif
phungductung 0:e87aa4c49e95 66 }
phungductung 0:e87aa4c49e95 67 }
phungductung 0:e87aa4c49e95 68 }
phungductung 0:e87aa4c49e95 69
phungductung 0:e87aa4c49e95 70 // Reconfigure the HAL tick using a standard timer instead of systick.
phungductung 0:e87aa4c49e95 71 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
phungductung 0:e87aa4c49e95 72 RCC_ClkInitTypeDef RCC_ClkInitStruct;
phungductung 0:e87aa4c49e95 73 uint32_t PclkFreq;
phungductung 0:e87aa4c49e95 74
phungductung 0:e87aa4c49e95 75 // Get clock configuration
phungductung 0:e87aa4c49e95 76 // Note: PclkFreq contains here the Latency (not used after)
phungductung 0:e87aa4c49e95 77 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
phungductung 0:e87aa4c49e95 78
phungductung 0:e87aa4c49e95 79 // Get TIM5 clock value
phungductung 0:e87aa4c49e95 80 PclkFreq = HAL_RCC_GetPCLK1Freq();
phungductung 0:e87aa4c49e95 81
phungductung 0:e87aa4c49e95 82 // Enable timer clock
phungductung 0:e87aa4c49e95 83 TIM_MST_RCC;
phungductung 0:e87aa4c49e95 84
phungductung 0:e87aa4c49e95 85 // Reset timer
phungductung 0:e87aa4c49e95 86 TIM_MST_RESET_ON;
phungductung 0:e87aa4c49e95 87 TIM_MST_RESET_OFF;
phungductung 0:e87aa4c49e95 88
phungductung 0:e87aa4c49e95 89 // Configure time base
phungductung 0:e87aa4c49e95 90 TimMasterHandle.Instance = TIM_MST;
phungductung 0:e87aa4c49e95 91 TimMasterHandle.Init.Period = 0xFFFFFFFF;
phungductung 0:e87aa4c49e95 92
phungductung 0:e87aa4c49e95 93 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
phungductung 0:e87aa4c49e95 94 if (RCC_ClkInitStruct.APB1CLKDivider == RCC_HCLK_DIV1)
phungductung 0:e87aa4c49e95 95 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 us tick
phungductung 0:e87aa4c49e95 96 else
phungductung 0:e87aa4c49e95 97 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 us tick
phungductung 0:e87aa4c49e95 98
phungductung 0:e87aa4c49e95 99 TimMasterHandle.Init.ClockDivision = 0;
phungductung 0:e87aa4c49e95 100 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
phungductung 0:e87aa4c49e95 101 TimMasterHandle.Init.RepetitionCounter = 0;
phungductung 0:e87aa4c49e95 102 HAL_TIM_OC_Init(&TimMasterHandle);
phungductung 0:e87aa4c49e95 103
phungductung 0:e87aa4c49e95 104 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
phungductung 0:e87aa4c49e95 105 NVIC_EnableIRQ(TIM_MST_IRQ);
phungductung 0:e87aa4c49e95 106
phungductung 0:e87aa4c49e95 107 // Channel 1 for mbed timeout
phungductung 0:e87aa4c49e95 108 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
phungductung 0:e87aa4c49e95 109
phungductung 0:e87aa4c49e95 110 // Channel 2 for HAL tick
phungductung 0:e87aa4c49e95 111 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
phungductung 0:e87aa4c49e95 112 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
phungductung 0:e87aa4c49e95 113 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
phungductung 0:e87aa4c49e95 114 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
phungductung 0:e87aa4c49e95 115
phungductung 0:e87aa4c49e95 116 #if DEBUG_TICK > 0
phungductung 0:e87aa4c49e95 117 __GPIOG_CLK_ENABLE();
phungductung 0:e87aa4c49e95 118 GPIO_InitTypeDef GPIO_InitStruct;
phungductung 0:e87aa4c49e95 119 GPIO_InitStruct.Pin = GPIO_PIN_6;
phungductung 0:e87aa4c49e95 120 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
phungductung 0:e87aa4c49e95 121 GPIO_InitStruct.Pull = GPIO_PULLUP;
phungductung 0:e87aa4c49e95 122 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
phungductung 0:e87aa4c49e95 123 HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
phungductung 0:e87aa4c49e95 124 #endif
phungductung 0:e87aa4c49e95 125
phungductung 0:e87aa4c49e95 126 return HAL_OK;
phungductung 0:e87aa4c49e95 127 }
phungductung 0:e87aa4c49e95 128
phungductung 0:e87aa4c49e95 129 /**
phungductung 0:e87aa4c49e95 130 * @}
phungductung 0:e87aa4c49e95 131 */
phungductung 0:e87aa4c49e95 132
phungductung 0:e87aa4c49e95 133 /**
phungductung 0:e87aa4c49e95 134 * @}
phungductung 0:e87aa4c49e95 135 */
phungductung 0:e87aa4c49e95 136
phungductung 0:e87aa4c49e95 137 /**
phungductung 0:e87aa4c49e95 138 * @}
phungductung 0:e87aa4c49e95 139 */
phungductung 0:e87aa4c49e95 140 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/