marcus chiou / mbed-src

mbed library sources

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targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_NUCLEO_F446RE/hal_tick.c@613:bc40b8d2aec4, 2015-08-20 (annotated)

Committer:
mbed_official
Date:
Thu Aug 20 10:45:13 2015 +0100
Revision:
613:bc40b8d2aec4
Parent:
553:063b9f2f393c 
Synchronized with git revision 92ca8c7b60a283b6bb60eb65b183dac1599f0ade



Full URL: https://github.com/mbedmicro/mbed/commit/92ca8c7b60a283b6bb60eb65b183dac1599f0ade/



Nordic: update application start address in GCC linker script

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 553:063b9f2f393c 1 /**
mbed_official 553:063b9f2f393c 2 ******************************************************************************
mbed_official 553:063b9f2f393c 3 * @file hal_tick.c
mbed_official 553:063b9f2f393c 4 * @author MCD Application Team
mbed_official 553:063b9f2f393c 5 * @brief Initialization of HAL tick
mbed_official 553:063b9f2f393c 6 ******************************************************************************
mbed_official 553:063b9f2f393c 7 * @attention
mbed_official 553:063b9f2f393c 8 *
mbed_official 613:bc40b8d2aec4 9 * <h2><center>&copy; COPYRIGHT 2015 STMicroelectronics</center></h2>
mbed_official 553:063b9f2f393c 10 *
mbed_official 553:063b9f2f393c 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 553:063b9f2f393c 12 * are permitted provided that the following conditions are met:
mbed_official 553:063b9f2f393c 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 553:063b9f2f393c 14 * this list of conditions and the following disclaimer.
mbed_official 553:063b9f2f393c 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 553:063b9f2f393c 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 553:063b9f2f393c 17 * and/or other materials provided with the distribution.
mbed_official 553:063b9f2f393c 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 553:063b9f2f393c 19 * may be used to endorse or promote products derived from this software
mbed_official 553:063b9f2f393c 20 * without specific prior written permission.
mbed_official 553:063b9f2f393c 21 *
mbed_official 553:063b9f2f393c 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 553:063b9f2f393c 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 553:063b9f2f393c 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 553:063b9f2f393c 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 553:063b9f2f393c 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 553:063b9f2f393c 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 553:063b9f2f393c 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 553:063b9f2f393c 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 553:063b9f2f393c 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 553:063b9f2f393c 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 553:063b9f2f393c 32 *
mbed_official 553:063b9f2f393c 33 ******************************************************************************
mbed_official 553:063b9f2f393c 34 */
mbed_official 553:063b9f2f393c 35 #include "hal_tick.h"
mbed_official 553:063b9f2f393c 36
mbed_official 613:bc40b8d2aec4 37 // 0=NO, 1=PB6 toggles at each tick
mbed_official 613:bc40b8d2aec4 38 #define DEBUG_TICK 0
mbed_official 613:bc40b8d2aec4 39
mbed_official 553:063b9f2f393c 40 TIM_HandleTypeDef TimMasterHandle;
mbed_official 553:063b9f2f393c 41 uint32_t PreviousVal = 0;
mbed_official 553:063b9f2f393c 42
mbed_official 553:063b9f2f393c 43 void us_ticker_irq_handler(void);
mbed_official 553:063b9f2f393c 44
mbed_official 553:063b9f2f393c 45 void timer_irq_handler(void) {
mbed_official 553:063b9f2f393c 46 // Channel 1 for mbed timeout
mbed_official 553:063b9f2f393c 47 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 553:063b9f2f393c 48 us_ticker_irq_handler();
mbed_official 553:063b9f2f393c 49 }
mbed_official 553:063b9f2f393c 50
mbed_official 553:063b9f2f393c 51 // Channel 2 for HAL tick
mbed_official 553:063b9f2f393c 52 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 553:063b9f2f393c 53 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 553:063b9f2f393c 54 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 553:063b9f2f393c 55 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 553:063b9f2f393c 56 // Increment HAL variable
mbed_official 553:063b9f2f393c 57 HAL_IncTick();
mbed_official 553:063b9f2f393c 58 // Prepare next interrupt
mbed_official 553:063b9f2f393c 59 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 553:063b9f2f393c 60 PreviousVal = val;
mbed_official 613:bc40b8d2aec4 61 #if DEBUG_TICK > 0
mbed_official 553:063b9f2f393c 62 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 553:063b9f2f393c 63 #endif
mbed_official 553:063b9f2f393c 64 }
mbed_official 553:063b9f2f393c 65 }
mbed_official 553:063b9f2f393c 66 }
mbed_official 553:063b9f2f393c 67
mbed_official 553:063b9f2f393c 68 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 553:063b9f2f393c 69 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 613:bc40b8d2aec4 70 RCC_ClkInitTypeDef RCC_ClkInitStruct;
mbed_official 613:bc40b8d2aec4 71 uint32_t PclkFreq;
mbed_official 613:bc40b8d2aec4 72
mbed_official 613:bc40b8d2aec4 73 // Get clock configuration
mbed_official 613:bc40b8d2aec4 74 // Note: PclkFreq contains here the Latency (not used after)
mbed_official 613:bc40b8d2aec4 75 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
mbed_official 613:bc40b8d2aec4 76
mbed_official 613:bc40b8d2aec4 77 // Get TIM5 clock value
mbed_official 613:bc40b8d2aec4 78 PclkFreq = HAL_RCC_GetPCLK1Freq();
mbed_official 613:bc40b8d2aec4 79
mbed_official 553:063b9f2f393c 80 // Enable timer clock
mbed_official 553:063b9f2f393c 81 TIM_MST_RCC;
mbed_official 553:063b9f2f393c 82
mbed_official 553:063b9f2f393c 83 // Reset timer
mbed_official 553:063b9f2f393c 84 TIM_MST_RESET_ON;
mbed_official 553:063b9f2f393c 85 TIM_MST_RESET_OFF;
mbed_official 613:bc40b8d2aec4 86
mbed_official 553:063b9f2f393c 87 // Configure time base
mbed_official 553:063b9f2f393c 88 TimMasterHandle.Instance = TIM_MST;
mbed_official 553:063b9f2f393c 89 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 613:bc40b8d2aec4 90
mbed_official 613:bc40b8d2aec4 91 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
mbed_official 613:bc40b8d2aec4 92 if (RCC_ClkInitStruct.APB1CLKDivider == RCC_HCLK_DIV1)
mbed_official 613:bc40b8d2aec4 93 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 us tick
mbed_official 613:bc40b8d2aec4 94 else
mbed_official 613:bc40b8d2aec4 95 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 us tick
mbed_official 613:bc40b8d2aec4 96
mbed_official 553:063b9f2f393c 97 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 553:063b9f2f393c 98 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 553:063b9f2f393c 99 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 553:063b9f2f393c 100 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 553:063b9f2f393c 101
mbed_official 553:063b9f2f393c 102 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 553:063b9f2f393c 103 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 553:063b9f2f393c 104
mbed_official 553:063b9f2f393c 105 // Channel 1 for mbed timeout
mbed_official 553:063b9f2f393c 106 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 553:063b9f2f393c 107
mbed_official 553:063b9f2f393c 108 // Channel 2 for HAL tick
mbed_official 553:063b9f2f393c 109 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 553:063b9f2f393c 110 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 553:063b9f2f393c 111 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 553:063b9f2f393c 112 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 553:063b9f2f393c 113
mbed_official 613:bc40b8d2aec4 114 #if DEBUG_TICK > 0
mbed_official 553:063b9f2f393c 115 __GPIOB_CLK_ENABLE();
mbed_official 553:063b9f2f393c 116 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 553:063b9f2f393c 117 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 553:063b9f2f393c 118 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 553:063b9f2f393c 119 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 553:063b9f2f393c 120 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
mbed_official 553:063b9f2f393c 121 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 553:063b9f2f393c 122 #endif
mbed_official 553:063b9f2f393c 123
mbed_official 553:063b9f2f393c 124 return HAL_OK;
mbed_official 553:063b9f2f393c 125 }
mbed_official 553:063b9f2f393c 126
mbed_official 553:063b9f2f393c 127 /**
mbed_official 553:063b9f2f393c 128 * @}
mbed_official 553:063b9f2f393c 129 */
mbed_official 553:063b9f2f393c 130
mbed_official 553:063b9f2f393c 131 /**
mbed_official 553:063b9f2f393c 132 * @}
mbed_official 553:063b9f2f393c 133 */
mbed_official 553:063b9f2f393c 134
mbed_official 553:063b9f2f393c 135 /**
mbed_official 553:063b9f2f393c 136 * @}
mbed_official 553:063b9f2f393c 137 */
mbed_official 553:063b9f2f393c 138 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/