gabriel della-monica / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F3/TARGET_NUCLEO_F334R8/hal_tick.c@445:9a3ffe6cfa19, 2015-01-14 (annotated)

Committer:
moirans2
Date:
Wed Jan 14 20:53:08 2015 +0000
Revision:
445:9a3ffe6cfa19
Parent:
385:be64abf45658 
internal clock stm32L051

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 330:c80ac197fa6a 1 /**
mbed_official 330:c80ac197fa6a 2 ******************************************************************************
mbed_official 330:c80ac197fa6a 3 * @file hal_tick.c
mbed_official 330:c80ac197fa6a 4 * @author MCD Application Team
mbed_official 330:c80ac197fa6a 5 * @brief Initialization of HAL tick
mbed_official 330:c80ac197fa6a 6 ******************************************************************************
mbed_official 330:c80ac197fa6a 7 * @attention
mbed_official 330:c80ac197fa6a 8 *
mbed_official 330:c80ac197fa6a 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 330:c80ac197fa6a 10 *
mbed_official 330:c80ac197fa6a 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 330:c80ac197fa6a 12 * are permitted provided that the following conditions are met:
mbed_official 330:c80ac197fa6a 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 330:c80ac197fa6a 14 * this list of conditions and the following disclaimer.
mbed_official 330:c80ac197fa6a 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 330:c80ac197fa6a 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 330:c80ac197fa6a 17 * and/or other materials provided with the distribution.
mbed_official 330:c80ac197fa6a 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 330:c80ac197fa6a 19 * may be used to endorse or promote products derived from this software
mbed_official 330:c80ac197fa6a 20 * without specific prior written permission.
mbed_official 330:c80ac197fa6a 21 *
mbed_official 330:c80ac197fa6a 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 330:c80ac197fa6a 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 330:c80ac197fa6a 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 330:c80ac197fa6a 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 330:c80ac197fa6a 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 330:c80ac197fa6a 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 330:c80ac197fa6a 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 330:c80ac197fa6a 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 330:c80ac197fa6a 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 330:c80ac197fa6a 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 330:c80ac197fa6a 32 *
mbed_official 330:c80ac197fa6a 33 ******************************************************************************
mbed_official 330:c80ac197fa6a 34 */
mbed_official 330:c80ac197fa6a 35 #include "hal_tick.h"
mbed_official 330:c80ac197fa6a 36
mbed_official 330:c80ac197fa6a 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 330:c80ac197fa6a 38 uint32_t PreviousVal = 0;
mbed_official 330:c80ac197fa6a 39
mbed_official 330:c80ac197fa6a 40 void us_ticker_irq_handler(void);
mbed_official 330:c80ac197fa6a 41
mbed_official 330:c80ac197fa6a 42 void timer_irq_handler(void) {
mbed_official 330:c80ac197fa6a 43 // Channel 1 for mbed timeout
mbed_official 330:c80ac197fa6a 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 330:c80ac197fa6a 45 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 330:c80ac197fa6a 46 us_ticker_irq_handler();
mbed_official 330:c80ac197fa6a 47 }
mbed_official 330:c80ac197fa6a 48
mbed_official 330:c80ac197fa6a 49 // Channel 2 for HAL tick
mbed_official 330:c80ac197fa6a 50 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 330:c80ac197fa6a 51 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 330:c80ac197fa6a 52 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 330:c80ac197fa6a 53 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 330:c80ac197fa6a 54 // Increment HAL variable
mbed_official 330:c80ac197fa6a 55 HAL_IncTick();
mbed_official 330:c80ac197fa6a 56 // Prepare next interrupt
mbed_official 330:c80ac197fa6a 57 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 330:c80ac197fa6a 58 PreviousVal = val;
mbed_official 330:c80ac197fa6a 59 #if 0 // For DEBUG only
mbed_official 330:c80ac197fa6a 60 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 330:c80ac197fa6a 61 #endif
mbed_official 330:c80ac197fa6a 62 }
mbed_official 330:c80ac197fa6a 63 }
mbed_official 330:c80ac197fa6a 64 }
mbed_official 330:c80ac197fa6a 65
mbed_official 330:c80ac197fa6a 66 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 330:c80ac197fa6a 67 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 330:c80ac197fa6a 68 // Enable timer clock
mbed_official 330:c80ac197fa6a 69 TIM_MST_RCC;
mbed_official 330:c80ac197fa6a 70
mbed_official 330:c80ac197fa6a 71 // Reset timer
mbed_official 330:c80ac197fa6a 72 TIM_MST_RESET_ON;
mbed_official 330:c80ac197fa6a 73 TIM_MST_RESET_OFF;
mbed_official 330:c80ac197fa6a 74
mbed_official 330:c80ac197fa6a 75 // Configure time base
mbed_official 330:c80ac197fa6a 76 TimMasterHandle.Instance = TIM_MST;
mbed_official 330:c80ac197fa6a 77 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 330:c80ac197fa6a 78 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 330:c80ac197fa6a 79 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 330:c80ac197fa6a 80 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 330:c80ac197fa6a 81 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 330:c80ac197fa6a 82 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 330:c80ac197fa6a 83
mbed_official 330:c80ac197fa6a 84 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 330:c80ac197fa6a 85 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 330:c80ac197fa6a 86
mbed_official 330:c80ac197fa6a 87 // Channel 1 for mbed timeout
mbed_official 330:c80ac197fa6a 88 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 330:c80ac197fa6a 89
mbed_official 330:c80ac197fa6a 90 // Channel 2 for HAL tick
mbed_official 330:c80ac197fa6a 91 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 330:c80ac197fa6a 92 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 330:c80ac197fa6a 93 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 330:c80ac197fa6a 94 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 330:c80ac197fa6a 95
mbed_official 330:c80ac197fa6a 96 #if 0 // For DEBUG only
mbed_official 330:c80ac197fa6a 97 __GPIOB_CLK_ENABLE();
mbed_official 330:c80ac197fa6a 98 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 330:c80ac197fa6a 99 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 330:c80ac197fa6a 100 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 330:c80ac197fa6a 101 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 330:c80ac197fa6a 102 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
mbed_official 330:c80ac197fa6a 103 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 330:c80ac197fa6a 104 #endif
mbed_official 330:c80ac197fa6a 105
mbed_official 330:c80ac197fa6a 106 return HAL_OK;
mbed_official 330:c80ac197fa6a 107 }
mbed_official 330:c80ac197fa6a 108
mbed_official 330:c80ac197fa6a 109 /**
mbed_official 330:c80ac197fa6a 110 * @}
mbed_official 330:c80ac197fa6a 111 */
mbed_official 330:c80ac197fa6a 112
mbed_official 330:c80ac197fa6a 113 /**
mbed_official 330:c80ac197fa6a 114 * @}
mbed_official 330:c80ac197fa6a 115 */
mbed_official 330:c80ac197fa6a 116
mbed_official 330:c80ac197fa6a 117 /**
mbed_official 330:c80ac197fa6a 118 * @}
mbed_official 330:c80ac197fa6a 119 */
mbed_official 330:c80ac197fa6a 120 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/