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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L1/TARGET_NUCLEO_L152RE/hal_tick.c@579:53297373a894, 2015-07-01 (annotated)

Committer:
mbed_official
Date:
Wed Jul 01 09:45:11 2015 +0100
Revision:
579:53297373a894
Parent:
394:83f921546702 
Synchronized with git revision d5b4d2ab9c47edb4dc5776e7177b0c2263459081



Full URL: https://github.com/mbedmicro/mbed/commit/d5b4d2ab9c47edb4dc5776e7177b0c2263459081/



Initial version of drivers for SAMR21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 354:e67efb2aab0e 1 /**
mbed_official 354:e67efb2aab0e 2 ******************************************************************************
mbed_official 354:e67efb2aab0e 3 * @file hal_tick.c
mbed_official 354:e67efb2aab0e 4 * @author MCD Application Team
mbed_official 354:e67efb2aab0e 5 * @brief Initialization of HAL tick
mbed_official 354:e67efb2aab0e 6 ******************************************************************************
mbed_official 354:e67efb2aab0e 7 * @attention
mbed_official 354:e67efb2aab0e 8 *
mbed_official 354:e67efb2aab0e 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 354:e67efb2aab0e 10 *
mbed_official 354:e67efb2aab0e 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 354:e67efb2aab0e 12 * are permitted provided that the following conditions are met:
mbed_official 354:e67efb2aab0e 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 354:e67efb2aab0e 14 * this list of conditions and the following disclaimer.
mbed_official 354:e67efb2aab0e 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 354:e67efb2aab0e 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 354:e67efb2aab0e 17 * and/or other materials provided with the distribution.
mbed_official 354:e67efb2aab0e 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 354:e67efb2aab0e 19 * may be used to endorse or promote products derived from this software
mbed_official 354:e67efb2aab0e 20 * without specific prior written permission.
mbed_official 354:e67efb2aab0e 21 *
mbed_official 354:e67efb2aab0e 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 354:e67efb2aab0e 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 354:e67efb2aab0e 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 354:e67efb2aab0e 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 354:e67efb2aab0e 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 354:e67efb2aab0e 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 354:e67efb2aab0e 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 354:e67efb2aab0e 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 354:e67efb2aab0e 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 354:e67efb2aab0e 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 354:e67efb2aab0e 32 *
mbed_official 354:e67efb2aab0e 33 ******************************************************************************
mbed_official 354:e67efb2aab0e 34 */
mbed_official 354:e67efb2aab0e 35 #include "hal_tick.h"
mbed_official 354:e67efb2aab0e 36
mbed_official 354:e67efb2aab0e 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 354:e67efb2aab0e 38 uint32_t PreviousVal = 0;
mbed_official 354:e67efb2aab0e 39
mbed_official 354:e67efb2aab0e 40 void us_ticker_irq_handler(void);
mbed_official 354:e67efb2aab0e 41
mbed_official 354:e67efb2aab0e 42 void timer_irq_handler(void) {
mbed_official 354:e67efb2aab0e 43 // Channel 1 for mbed timeout
mbed_official 354:e67efb2aab0e 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 354:e67efb2aab0e 45 us_ticker_irq_handler();
mbed_official 354:e67efb2aab0e 46 }
mbed_official 354:e67efb2aab0e 47
mbed_official 354:e67efb2aab0e 48 // Channel 2 for HAL tick
mbed_official 354:e67efb2aab0e 49 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 354:e67efb2aab0e 50 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 354:e67efb2aab0e 51 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 354:e67efb2aab0e 52 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 354:e67efb2aab0e 53 // Increment HAL variable
mbed_official 354:e67efb2aab0e 54 HAL_IncTick();
mbed_official 354:e67efb2aab0e 55 // Prepare next interrupt
mbed_official 354:e67efb2aab0e 56 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 354:e67efb2aab0e 57 PreviousVal = val;
mbed_official 354:e67efb2aab0e 58 #if 0 // For DEBUG only
mbed_official 354:e67efb2aab0e 59 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 354:e67efb2aab0e 60 #endif
mbed_official 354:e67efb2aab0e 61 }
mbed_official 354:e67efb2aab0e 62 }
mbed_official 354:e67efb2aab0e 63 }
mbed_official 354:e67efb2aab0e 64
mbed_official 354:e67efb2aab0e 65 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 354:e67efb2aab0e 66 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 354:e67efb2aab0e 67 // Enable timer clock
mbed_official 354:e67efb2aab0e 68 TIM_MST_RCC;
mbed_official 354:e67efb2aab0e 69
mbed_official 354:e67efb2aab0e 70 // Reset timer
mbed_official 354:e67efb2aab0e 71 TIM_MST_RESET_ON;
mbed_official 354:e67efb2aab0e 72 TIM_MST_RESET_OFF;
mbed_official 354:e67efb2aab0e 73
mbed_official 354:e67efb2aab0e 74 // Update the SystemCoreClock variable
mbed_official 354:e67efb2aab0e 75 SystemCoreClockUpdate();
mbed_official 354:e67efb2aab0e 76
mbed_official 354:e67efb2aab0e 77 // Configure time base
mbed_official 354:e67efb2aab0e 78 TimMasterHandle.Instance = TIM_MST;
mbed_official 354:e67efb2aab0e 79 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 354:e67efb2aab0e 80 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 354:e67efb2aab0e 81 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 354:e67efb2aab0e 82 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 354:e67efb2aab0e 83 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 354:e67efb2aab0e 84
mbed_official 354:e67efb2aab0e 85 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 354:e67efb2aab0e 86 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 354:e67efb2aab0e 87
mbed_official 354:e67efb2aab0e 88 // Channel 1 for mbed timeout
mbed_official 354:e67efb2aab0e 89 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 354:e67efb2aab0e 90
mbed_official 354:e67efb2aab0e 91 // Channel 2 for HAL tick
mbed_official 354:e67efb2aab0e 92 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 354:e67efb2aab0e 93 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 354:e67efb2aab0e 94 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 354:e67efb2aab0e 95 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 354:e67efb2aab0e 96
mbed_official 354:e67efb2aab0e 97 #if 0 // For DEBUG only
mbed_official 354:e67efb2aab0e 98 __GPIOB_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 99 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 354:e67efb2aab0e 100 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 354:e67efb2aab0e 101 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 354:e67efb2aab0e 102 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 354:e67efb2aab0e 103 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
mbed_official 354:e67efb2aab0e 104 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 354:e67efb2aab0e 105 #endif
mbed_official 354:e67efb2aab0e 106
mbed_official 354:e67efb2aab0e 107 return HAL_OK;
mbed_official 354:e67efb2aab0e 108 }
mbed_official 354:e67efb2aab0e 109
mbed_official 354:e67efb2aab0e 110 /**
mbed_official 354:e67efb2aab0e 111 * @}
mbed_official 354:e67efb2aab0e 112 */
mbed_official 354:e67efb2aab0e 113
mbed_official 354:e67efb2aab0e 114 /**
mbed_official 354:e67efb2aab0e 115 * @}
mbed_official 354:e67efb2aab0e 116 */
mbed_official 354:e67efb2aab0e 117
mbed_official 354:e67efb2aab0e 118 /**
mbed_official 354:e67efb2aab0e 119 * @}
mbed_official 354:e67efb2aab0e 120 */
mbed_official 354:e67efb2aab0e 121 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/