Julien Cassette / mbed-dev

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targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_NUCLEO_F446RE/hal_tick.c@79:9f34958201cc, 2016-03-14 (annotated)

Committer:
jcassette
Date:
Mon Mar 14 14:20:17 2016 +0000
Revision:
79:9f34958201cc
Parent:
0:9b334a45a8ff 
FRDM-K64F AnalogIn: add support for ADC channels with no mapped pins

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /**
bogdanm 0:9b334a45a8ff 2 ******************************************************************************
bogdanm 0:9b334a45a8ff 3 * @file hal_tick.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
bogdanm 0:9b334a45a8ff 5 * @brief Initialization of HAL tick
bogdanm 0:9b334a45a8ff 6 ******************************************************************************
bogdanm 0:9b334a45a8ff 7 * @attention
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * <h2><center>&copy; COPYRIGHT 2015 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 10 *
bogdanm 0:9b334a45a8ff 11 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 12 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 13 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 14 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 16 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 17 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 19 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 20 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 21 *
bogdanm 0:9b334a45a8ff 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 32 *
bogdanm 0:9b334a45a8ff 33 ******************************************************************************
bogdanm 0:9b334a45a8ff 34 */
bogdanm 0:9b334a45a8ff 35 #include "hal_tick.h"
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 // 0=NO, 1=PB6 toggles at each tick
bogdanm 0:9b334a45a8ff 38 #define DEBUG_TICK 0
bogdanm 0:9b334a45a8ff 39
bogdanm 0:9b334a45a8ff 40 TIM_HandleTypeDef TimMasterHandle;
bogdanm 0:9b334a45a8ff 41 uint32_t PreviousVal = 0;
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 void us_ticker_irq_handler(void);
bogdanm 0:9b334a45a8ff 44
bogdanm 0:9b334a45a8ff 45 void timer_irq_handler(void) {
bogdanm 0:9b334a45a8ff 46 // Channel 1 for mbed timeout
bogdanm 0:9b334a45a8ff 47 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
bogdanm 0:9b334a45a8ff 48 us_ticker_irq_handler();
bogdanm 0:9b334a45a8ff 49 }
bogdanm 0:9b334a45a8ff 50
bogdanm 0:9b334a45a8ff 51 // Channel 2 for HAL tick
bogdanm 0:9b334a45a8ff 52 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
bogdanm 0:9b334a45a8ff 53 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
bogdanm 0:9b334a45a8ff 54 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
bogdanm 0:9b334a45a8ff 55 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
bogdanm 0:9b334a45a8ff 56 // Increment HAL variable
bogdanm 0:9b334a45a8ff 57 HAL_IncTick();
bogdanm 0:9b334a45a8ff 58 // Prepare next interrupt
bogdanm 0:9b334a45a8ff 59 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
bogdanm 0:9b334a45a8ff 60 PreviousVal = val;
bogdanm 0:9b334a45a8ff 61 #if DEBUG_TICK > 0
bogdanm 0:9b334a45a8ff 62 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
bogdanm 0:9b334a45a8ff 63 #endif
bogdanm 0:9b334a45a8ff 64 }
bogdanm 0:9b334a45a8ff 65 }
bogdanm 0:9b334a45a8ff 66 }
bogdanm 0:9b334a45a8ff 67
bogdanm 0:9b334a45a8ff 68 // Reconfigure the HAL tick using a standard timer instead of systick.
bogdanm 0:9b334a45a8ff 69 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
bogdanm 0:9b334a45a8ff 70 RCC_ClkInitTypeDef RCC_ClkInitStruct;
bogdanm 0:9b334a45a8ff 71 uint32_t PclkFreq;
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73 // Get clock configuration
bogdanm 0:9b334a45a8ff 74 // Note: PclkFreq contains here the Latency (not used after)
bogdanm 0:9b334a45a8ff 75 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 // Get TIM5 clock value
bogdanm 0:9b334a45a8ff 78 PclkFreq = HAL_RCC_GetPCLK1Freq();
bogdanm 0:9b334a45a8ff 79
bogdanm 0:9b334a45a8ff 80 // Enable timer clock
bogdanm 0:9b334a45a8ff 81 TIM_MST_RCC;
bogdanm 0:9b334a45a8ff 82
bogdanm 0:9b334a45a8ff 83 // Reset timer
bogdanm 0:9b334a45a8ff 84 TIM_MST_RESET_ON;
bogdanm 0:9b334a45a8ff 85 TIM_MST_RESET_OFF;
bogdanm 0:9b334a45a8ff 86
bogdanm 0:9b334a45a8ff 87 // Configure time base
bogdanm 0:9b334a45a8ff 88 TimMasterHandle.Instance = TIM_MST;
bogdanm 0:9b334a45a8ff 89 TimMasterHandle.Init.Period = 0xFFFFFFFF;
bogdanm 0:9b334a45a8ff 90
bogdanm 0:9b334a45a8ff 91 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
bogdanm 0:9b334a45a8ff 92 if (RCC_ClkInitStruct.APB1CLKDivider == RCC_HCLK_DIV1)
bogdanm 0:9b334a45a8ff 93 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 us tick
bogdanm 0:9b334a45a8ff 94 else
bogdanm 0:9b334a45a8ff 95 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 us tick
bogdanm 0:9b334a45a8ff 96
bogdanm 0:9b334a45a8ff 97 TimMasterHandle.Init.ClockDivision = 0;
bogdanm 0:9b334a45a8ff 98 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
bogdanm 0:9b334a45a8ff 99 TimMasterHandle.Init.RepetitionCounter = 0;
bogdanm 0:9b334a45a8ff 100 HAL_TIM_OC_Init(&TimMasterHandle);
bogdanm 0:9b334a45a8ff 101
bogdanm 0:9b334a45a8ff 102 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
bogdanm 0:9b334a45a8ff 103 NVIC_EnableIRQ(TIM_MST_IRQ);
bogdanm 0:9b334a45a8ff 104
bogdanm 0:9b334a45a8ff 105 // Channel 1 for mbed timeout
bogdanm 0:9b334a45a8ff 106 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
bogdanm 0:9b334a45a8ff 107
bogdanm 0:9b334a45a8ff 108 // Channel 2 for HAL tick
bogdanm 0:9b334a45a8ff 109 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
bogdanm 0:9b334a45a8ff 110 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
bogdanm 0:9b334a45a8ff 111 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
bogdanm 0:9b334a45a8ff 112 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
bogdanm 0:9b334a45a8ff 113
bogdanm 0:9b334a45a8ff 114 #if DEBUG_TICK > 0
bogdanm 0:9b334a45a8ff 115 __GPIOB_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 116 GPIO_InitTypeDef GPIO_InitStruct;
bogdanm 0:9b334a45a8ff 117 GPIO_InitStruct.Pin = GPIO_PIN_6;
bogdanm 0:9b334a45a8ff 118 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
bogdanm 0:9b334a45a8ff 119 GPIO_InitStruct.Pull = GPIO_PULLUP;
bogdanm 0:9b334a45a8ff 120 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
bogdanm 0:9b334a45a8ff 121 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
bogdanm 0:9b334a45a8ff 122 #endif
bogdanm 0:9b334a45a8ff 123
bogdanm 0:9b334a45a8ff 124 return HAL_OK;
bogdanm 0:9b334a45a8ff 125 }
bogdanm 0:9b334a45a8ff 126
bogdanm 0:9b334a45a8ff 127 /**
bogdanm 0:9b334a45a8ff 128 * @}
bogdanm 0:9b334a45a8ff 129 */
bogdanm 0:9b334a45a8ff 130
bogdanm 0:9b334a45a8ff 131 /**
bogdanm 0:9b334a45a8ff 132 * @}
bogdanm 0:9b334a45a8ff 133 */
bogdanm 0:9b334a45a8ff 134
bogdanm 0:9b334a45a8ff 135 /**
bogdanm 0:9b334a45a8ff 136 * @}
bogdanm 0:9b334a45a8ff 137 */
bogdanm 0:9b334a45a8ff 138 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/