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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F7/TARGET_DISCO_F746NG/hal_tick.c@610:813dcc80987e, 2015-08-14 (annotated)

Committer:
mbed_official
Date:
Fri Aug 14 13:15:17 2015 +0100
Revision:
610:813dcc80987e
Parent:
573:ad23fe03a082 
Synchronized with git revision 6d84db41c6833e0b9b024741eb0616a5f62d5599



Full URL: https://github.com/mbedmicro/mbed/commit/6d84db41c6833e0b9b024741eb0616a5f62d5599/



DISCO_F746NG - Improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 573:ad23fe03a082 1 /**
mbed_official 573:ad23fe03a082 2 ******************************************************************************
mbed_official 573:ad23fe03a082 3 * @file hal_tick.c
mbed_official 573:ad23fe03a082 4 * @author MCD Application Team
mbed_official 573:ad23fe03a082 5 * @brief Initialization of HAL tick
mbed_official 573:ad23fe03a082 6 ******************************************************************************
mbed_official 573:ad23fe03a082 7 * @attention
mbed_official 573:ad23fe03a082 8 *
mbed_official 573:ad23fe03a082 9 * <h2><center>&copy; COPYRIGHT 2015 STMicroelectronics</center></h2>
mbed_official 573:ad23fe03a082 10 *
mbed_official 573:ad23fe03a082 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 573:ad23fe03a082 12 * are permitted provided that the following conditions are met:
mbed_official 573:ad23fe03a082 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 573:ad23fe03a082 14 * this list of conditions and the following disclaimer.
mbed_official 573:ad23fe03a082 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 573:ad23fe03a082 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 573:ad23fe03a082 17 * and/or other materials provided with the distribution.
mbed_official 573:ad23fe03a082 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 573:ad23fe03a082 19 * may be used to endorse or promote products derived from this software
mbed_official 573:ad23fe03a082 20 * without specific prior written permission.
mbed_official 573:ad23fe03a082 21 *
mbed_official 573:ad23fe03a082 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 573:ad23fe03a082 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 573:ad23fe03a082 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 573:ad23fe03a082 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 573:ad23fe03a082 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 573:ad23fe03a082 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 573:ad23fe03a082 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 573:ad23fe03a082 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 573:ad23fe03a082 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 573:ad23fe03a082 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 573:ad23fe03a082 32 *
mbed_official 573:ad23fe03a082 33 ******************************************************************************
mbed_official 573:ad23fe03a082 34 */
mbed_official 573:ad23fe03a082 35 #include "hal_tick.h"
mbed_official 573:ad23fe03a082 36
mbed_official 610:813dcc80987e 37 // 0=NO, 1=PG6 toggles at each tick
mbed_official 573:ad23fe03a082 38 #define DEBUG_TICK 0
mbed_official 573:ad23fe03a082 39
mbed_official 573:ad23fe03a082 40 TIM_HandleTypeDef TimMasterHandle;
mbed_official 573:ad23fe03a082 41 uint32_t PreviousVal = 0;
mbed_official 573:ad23fe03a082 42
mbed_official 573:ad23fe03a082 43 void HAL_IncTick(void);
mbed_official 573:ad23fe03a082 44 void us_ticker_irq_handler(void);
mbed_official 573:ad23fe03a082 45
mbed_official 573:ad23fe03a082 46 void timer_irq_handler(void) {
mbed_official 573:ad23fe03a082 47 // Channel 1 for mbed timeout
mbed_official 573:ad23fe03a082 48 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 573:ad23fe03a082 49 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 573:ad23fe03a082 50 us_ticker_irq_handler();
mbed_official 573:ad23fe03a082 51 }
mbed_official 573:ad23fe03a082 52
mbed_official 573:ad23fe03a082 53 // Channel 2 for HAL tick
mbed_official 573:ad23fe03a082 54 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 573:ad23fe03a082 55 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 573:ad23fe03a082 56 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 573:ad23fe03a082 57 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 573:ad23fe03a082 58 // Increment HAL variable
mbed_official 573:ad23fe03a082 59 HAL_IncTick();
mbed_official 573:ad23fe03a082 60 // Prepare next interrupt
mbed_official 573:ad23fe03a082 61 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 573:ad23fe03a082 62 PreviousVal = val;
mbed_official 610:813dcc80987e 63 #if DEBUG_TICK > 0
mbed_official 573:ad23fe03a082 64 HAL_GPIO_TogglePin(GPIOG, GPIO_PIN_6);
mbed_official 573:ad23fe03a082 65 #endif
mbed_official 573:ad23fe03a082 66 }
mbed_official 573:ad23fe03a082 67 }
mbed_official 573:ad23fe03a082 68 }
mbed_official 573:ad23fe03a082 69
mbed_official 573:ad23fe03a082 70 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 573:ad23fe03a082 71 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 610:813dcc80987e 72 RCC_ClkInitTypeDef RCC_ClkInitStruct;
mbed_official 610:813dcc80987e 73 uint32_t PclkFreq;
mbed_official 610:813dcc80987e 74
mbed_official 610:813dcc80987e 75 // Get clock configuration
mbed_official 610:813dcc80987e 76 // Note: PclkFreq contains here the Latency (not used after)
mbed_official 610:813dcc80987e 77 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
mbed_official 610:813dcc80987e 78
mbed_official 610:813dcc80987e 79 // Get TIM5 clock value
mbed_official 610:813dcc80987e 80 PclkFreq = HAL_RCC_GetPCLK1Freq();
mbed_official 610:813dcc80987e 81
mbed_official 573:ad23fe03a082 82 // Enable timer clock
mbed_official 573:ad23fe03a082 83 TIM_MST_RCC;
mbed_official 573:ad23fe03a082 84
mbed_official 573:ad23fe03a082 85 // Reset timer
mbed_official 573:ad23fe03a082 86 TIM_MST_RESET_ON;
mbed_official 573:ad23fe03a082 87 TIM_MST_RESET_OFF;
mbed_official 573:ad23fe03a082 88
mbed_official 573:ad23fe03a082 89 // Configure time base
mbed_official 573:ad23fe03a082 90 TimMasterHandle.Instance = TIM_MST;
mbed_official 610:813dcc80987e 91 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 610:813dcc80987e 92
mbed_official 610:813dcc80987e 93 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
mbed_official 610:813dcc80987e 94 if (RCC_ClkInitStruct.APB1CLKDivider == RCC_HCLK_DIV1)
mbed_official 610:813dcc80987e 95 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 us tick
mbed_official 610:813dcc80987e 96 else
mbed_official 610:813dcc80987e 97 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 us tick
mbed_official 610:813dcc80987e 98
mbed_official 573:ad23fe03a082 99 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 573:ad23fe03a082 100 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 573:ad23fe03a082 101 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 573:ad23fe03a082 102 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 573:ad23fe03a082 103
mbed_official 573:ad23fe03a082 104 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 573:ad23fe03a082 105 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 573:ad23fe03a082 106
mbed_official 573:ad23fe03a082 107 // Channel 1 for mbed timeout
mbed_official 573:ad23fe03a082 108 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 573:ad23fe03a082 109
mbed_official 573:ad23fe03a082 110 // Channel 2 for HAL tick
mbed_official 573:ad23fe03a082 111 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 573:ad23fe03a082 112 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 573:ad23fe03a082 113 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 573:ad23fe03a082 114 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 573:ad23fe03a082 115
mbed_official 610:813dcc80987e 116 #if DEBUG_TICK > 0
mbed_official 573:ad23fe03a082 117 __GPIOG_CLK_ENABLE();
mbed_official 573:ad23fe03a082 118 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 573:ad23fe03a082 119 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 573:ad23fe03a082 120 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 573:ad23fe03a082 121 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 573:ad23fe03a082 122 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
mbed_official 573:ad23fe03a082 123 HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
mbed_official 573:ad23fe03a082 124 #endif
mbed_official 573:ad23fe03a082 125
mbed_official 573:ad23fe03a082 126 return HAL_OK;
mbed_official 573:ad23fe03a082 127 }
mbed_official 573:ad23fe03a082 128
mbed_official 573:ad23fe03a082 129 /**
mbed_official 573:ad23fe03a082 130 * @}
mbed_official 573:ad23fe03a082 131 */
mbed_official 573:ad23fe03a082 132
mbed_official 573:ad23fe03a082 133 /**
mbed_official 573:ad23fe03a082 134 * @}
mbed_official 573:ad23fe03a082 135 */
mbed_official 573:ad23fe03a082 136
mbed_official 573:ad23fe03a082 137 /**
mbed_official 573:ad23fe03a082 138 * @}
mbed_official 573:ad23fe03a082 139 */
mbed_official 573:ad23fe03a082 140 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/