Stuart Northfield / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_STM32F407VG/hal_tick.c@384:ef87175507f1, 2014-11-04 (annotated)

Committer:
mbed_official
Date:
Tue Nov 04 09:30:07 2014 +0000
Revision:
384:ef87175507f1
Parent:
targets/cmsis/TARGET_STM/TARGET_STM32F407VG/hal_tick.c@296:ec1b66a3d094 
Synchronized with git revision 8f7778d898867246da01cfccb39396c2e419c1f6



Full URL: https://github.com/mbedmicro/mbed/commit/8f7778d898867246da01cfccb39396c2e419c1f6/



Targets: Nucleo F4xx - Reorder f4xx structure

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 242:7074e42da0b2 1 /**
mbed_official 242:7074e42da0b2 2 ******************************************************************************
mbed_official 242:7074e42da0b2 3 * @file hal_tick.c
mbed_official 242:7074e42da0b2 4 * @author MCD Application Team
mbed_official 242:7074e42da0b2 5 * @brief Initialization of HAL tick
mbed_official 242:7074e42da0b2 6 ******************************************************************************
mbed_official 242:7074e42da0b2 7 * @attention
mbed_official 242:7074e42da0b2 8 *
mbed_official 242:7074e42da0b2 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 242:7074e42da0b2 10 *
mbed_official 242:7074e42da0b2 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 242:7074e42da0b2 12 * are permitted provided that the following conditions are met:
mbed_official 242:7074e42da0b2 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 242:7074e42da0b2 14 * this list of conditions and the following disclaimer.
mbed_official 242:7074e42da0b2 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 242:7074e42da0b2 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 242:7074e42da0b2 17 * and/or other materials provided with the distribution.
mbed_official 242:7074e42da0b2 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 242:7074e42da0b2 19 * may be used to endorse or promote products derived from this software
mbed_official 242:7074e42da0b2 20 * without specific prior written permission.
mbed_official 242:7074e42da0b2 21 *
mbed_official 242:7074e42da0b2 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 242:7074e42da0b2 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 242:7074e42da0b2 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 242:7074e42da0b2 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 242:7074e42da0b2 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 242:7074e42da0b2 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 242:7074e42da0b2 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 242:7074e42da0b2 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 242:7074e42da0b2 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 242:7074e42da0b2 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 242:7074e42da0b2 32 *
mbed_official 242:7074e42da0b2 33 ******************************************************************************
mbed_official 242:7074e42da0b2 34 */
mbed_official 242:7074e42da0b2 35 #include "hal_tick.h"
mbed_official 242:7074e42da0b2 36
mbed_official 242:7074e42da0b2 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 242:7074e42da0b2 38 uint32_t PreviousVal = 0;
mbed_official 242:7074e42da0b2 39
mbed_official 242:7074e42da0b2 40 void us_ticker_irq_handler(void);
mbed_official 242:7074e42da0b2 41
mbed_official 242:7074e42da0b2 42 void timer_irq_handler(void) {
mbed_official 242:7074e42da0b2 43 // Channel 1 for mbed timeout
mbed_official 242:7074e42da0b2 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 242:7074e42da0b2 45 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 242:7074e42da0b2 46 us_ticker_irq_handler();
mbed_official 242:7074e42da0b2 47 }
mbed_official 242:7074e42da0b2 48
mbed_official 242:7074e42da0b2 49 // Channel 2 for HAL tick
mbed_official 242:7074e42da0b2 50 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 242:7074e42da0b2 51 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 242:7074e42da0b2 52 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 242:7074e42da0b2 53 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 242:7074e42da0b2 54 // Increment HAL variable
mbed_official 242:7074e42da0b2 55 HAL_IncTick();
mbed_official 242:7074e42da0b2 56 // Prepare next interrupt
mbed_official 242:7074e42da0b2 57 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 242:7074e42da0b2 58 PreviousVal = val;
mbed_official 242:7074e42da0b2 59 #if 0 // For DEBUG only
mbed_official 242:7074e42da0b2 60 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 242:7074e42da0b2 61 #endif
mbed_official 242:7074e42da0b2 62 }
mbed_official 242:7074e42da0b2 63 }
mbed_official 242:7074e42da0b2 64 }
mbed_official 242:7074e42da0b2 65
mbed_official 242:7074e42da0b2 66 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 242:7074e42da0b2 67 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 242:7074e42da0b2 68 // Enable timer clock
mbed_official 242:7074e42da0b2 69 TIM_MST_RCC;
mbed_official 242:7074e42da0b2 70
mbed_official 242:7074e42da0b2 71 // Reset timer
mbed_official 242:7074e42da0b2 72 TIM_MST_RESET_ON;
mbed_official 242:7074e42da0b2 73 TIM_MST_RESET_OFF;
mbed_official 242:7074e42da0b2 74
mbed_official 242:7074e42da0b2 75 // Configure time base
mbed_official 242:7074e42da0b2 76 TimMasterHandle.Instance = TIM_MST;
mbed_official 242:7074e42da0b2 77 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 242:7074e42da0b2 78 if ( SystemCoreClock == 16000000 ) {
mbed_official 242:7074e42da0b2 79 TimMasterHandle.Init.Prescaler = (uint32_t)( SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 242:7074e42da0b2 80 } else {
mbed_official 242:7074e42da0b2 81 TimMasterHandle.Init.Prescaler = (uint32_t)( SystemCoreClock / 2 / 1000000) - 1; // 1 µs tick
mbed_official 242:7074e42da0b2 82 }
mbed_official 242:7074e42da0b2 83 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 242:7074e42da0b2 84 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 242:7074e42da0b2 85 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 242:7074e42da0b2 86 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 242:7074e42da0b2 87
mbed_official 242:7074e42da0b2 88 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 242:7074e42da0b2 89 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 242:7074e42da0b2 90
mbed_official 242:7074e42da0b2 91 // Channel 1 for mbed timeout
mbed_official 242:7074e42da0b2 92 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 242:7074e42da0b2 93
mbed_official 242:7074e42da0b2 94 // Channel 2 for HAL tick
mbed_official 242:7074e42da0b2 95 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 242:7074e42da0b2 96 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 242:7074e42da0b2 97 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 242:7074e42da0b2 98 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 242:7074e42da0b2 99
mbed_official 242:7074e42da0b2 100 #if 0 // For DEBUG only
mbed_official 242:7074e42da0b2 101 __GPIOB_CLK_ENABLE();
mbed_official 242:7074e42da0b2 102 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 242:7074e42da0b2 103 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 242:7074e42da0b2 104 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 242:7074e42da0b2 105 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 242:7074e42da0b2 106 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
mbed_official 242:7074e42da0b2 107 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 242:7074e42da0b2 108 #endif
mbed_official 242:7074e42da0b2 109
mbed_official 242:7074e42da0b2 110 return HAL_OK;
mbed_official 242:7074e42da0b2 111 }
mbed_official 242:7074e42da0b2 112
mbed_official 242:7074e42da0b2 113 /**
mbed_official 242:7074e42da0b2 114 * @}
mbed_official 242:7074e42da0b2 115 */
mbed_official 242:7074e42da0b2 116
mbed_official 242:7074e42da0b2 117 /**
mbed_official 242:7074e42da0b2 118 * @}
mbed_official 242:7074e42da0b2 119 */
mbed_official 242:7074e42da0b2 120
mbed_official 242:7074e42da0b2 121 /**
mbed_official 242:7074e42da0b2 122 * @}
mbed_official 242:7074e42da0b2 123 */
mbed_official 242:7074e42da0b2 124 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/