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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_STM32L1/TARGET_MOTE_L152RC/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:
522:aee49fe30179 
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 522:aee49fe30179 1 /**
mbed_official 522:aee49fe30179 2 ******************************************************************************
mbed_official 522:aee49fe30179 3 * @file hal_tick.c
mbed_official 522:aee49fe30179 4 * @author MCD Application Team
mbed_official 522:aee49fe30179 5 * @brief Initialization of HAL tick
mbed_official 522:aee49fe30179 6 ******************************************************************************
mbed_official 522:aee49fe30179 7 * @attention
mbed_official 522:aee49fe30179 8 *
mbed_official 522:aee49fe30179 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 522:aee49fe30179 10 *
mbed_official 522:aee49fe30179 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 522:aee49fe30179 12 * are permitted provided that the following conditions are met:
mbed_official 522:aee49fe30179 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 522:aee49fe30179 14 * this list of conditions and the following disclaimer.
mbed_official 522:aee49fe30179 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 522:aee49fe30179 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 522:aee49fe30179 17 * and/or other materials provided with the distribution.
mbed_official 522:aee49fe30179 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 522:aee49fe30179 19 * may be used to endorse or promote products derived from this software
mbed_official 522:aee49fe30179 20 * without specific prior written permission.
mbed_official 522:aee49fe30179 21 *
mbed_official 522:aee49fe30179 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 522:aee49fe30179 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 522:aee49fe30179 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 522:aee49fe30179 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 522:aee49fe30179 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 522:aee49fe30179 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 522:aee49fe30179 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 522:aee49fe30179 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 522:aee49fe30179 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 522:aee49fe30179 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 522:aee49fe30179 32 *
mbed_official 522:aee49fe30179 33 ******************************************************************************
mbed_official 522:aee49fe30179 34 */
mbed_official 522:aee49fe30179 35 #include "hal_tick.h"
mbed_official 522:aee49fe30179 36
mbed_official 522:aee49fe30179 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 522:aee49fe30179 38 uint32_t PreviousVal = 0;
mbed_official 522:aee49fe30179 39
mbed_official 522:aee49fe30179 40 void us_ticker_irq_handler(void);
mbed_official 522:aee49fe30179 41
mbed_official 522:aee49fe30179 42 void timer_irq_handler(void) {
mbed_official 522:aee49fe30179 43 // Channel 1 for mbed timeout
mbed_official 522:aee49fe30179 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 522:aee49fe30179 45 us_ticker_irq_handler();
mbed_official 522:aee49fe30179 46 }
mbed_official 522:aee49fe30179 47
mbed_official 522:aee49fe30179 48 // Channel 2 for HAL tick
mbed_official 522:aee49fe30179 49 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 522:aee49fe30179 50 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 522:aee49fe30179 51 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 522:aee49fe30179 52 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 522:aee49fe30179 53 // Increment HAL variable
mbed_official 522:aee49fe30179 54 HAL_IncTick();
mbed_official 522:aee49fe30179 55 // Prepare next interrupt
mbed_official 522:aee49fe30179 56 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 522:aee49fe30179 57 PreviousVal = val;
mbed_official 522:aee49fe30179 58 #if 0 // For DEBUG only
mbed_official 522:aee49fe30179 59 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 522:aee49fe30179 60 #endif
mbed_official 522:aee49fe30179 61 }
mbed_official 522:aee49fe30179 62 }
mbed_official 522:aee49fe30179 63 }
mbed_official 522:aee49fe30179 64
mbed_official 522:aee49fe30179 65 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 522:aee49fe30179 66 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 522:aee49fe30179 67 // Enable timer clock
mbed_official 522:aee49fe30179 68 TIM_MST_RCC;
mbed_official 522:aee49fe30179 69
mbed_official 522:aee49fe30179 70 // Reset timer
mbed_official 522:aee49fe30179 71 TIM_MST_RESET_ON;
mbed_official 522:aee49fe30179 72 TIM_MST_RESET_OFF;
mbed_official 522:aee49fe30179 73
mbed_official 522:aee49fe30179 74 // Update the SystemCoreClock variable
mbed_official 522:aee49fe30179 75 SystemCoreClockUpdate();
mbed_official 522:aee49fe30179 76
mbed_official 522:aee49fe30179 77 // Configure time base
mbed_official 522:aee49fe30179 78 TimMasterHandle.Instance = TIM_MST;
mbed_official 522:aee49fe30179 79 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 522:aee49fe30179 80 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 522:aee49fe30179 81 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 522:aee49fe30179 82 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 522:aee49fe30179 83 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 522:aee49fe30179 84
mbed_official 522:aee49fe30179 85 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 522:aee49fe30179 86 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 522:aee49fe30179 87
mbed_official 522:aee49fe30179 88 // Channel 1 for mbed timeout
mbed_official 522:aee49fe30179 89 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 522:aee49fe30179 90
mbed_official 522:aee49fe30179 91 // Channel 2 for HAL tick
mbed_official 522:aee49fe30179 92 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 522:aee49fe30179 93 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 522:aee49fe30179 94 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 522:aee49fe30179 95 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 522:aee49fe30179 96
mbed_official 522:aee49fe30179 97 #if 0 // For DEBUG only
mbed_official 522:aee49fe30179 98 __GPIOB_CLK_ENABLE();
mbed_official 522:aee49fe30179 99 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 522:aee49fe30179 100 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 522:aee49fe30179 101 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 522:aee49fe30179 102 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 522:aee49fe30179 103 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
mbed_official 522:aee49fe30179 104 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 522:aee49fe30179 105 #endif
mbed_official 522:aee49fe30179 106
mbed_official 522:aee49fe30179 107 return HAL_OK;
mbed_official 522:aee49fe30179 108 }
mbed_official 522:aee49fe30179 109
mbed_official 522:aee49fe30179 110 /**
mbed_official 522:aee49fe30179 111 * @}
mbed_official 522:aee49fe30179 112 */
mbed_official 522:aee49fe30179 113
mbed_official 522:aee49fe30179 114 /**
mbed_official 522:aee49fe30179 115 * @}
mbed_official 522:aee49fe30179 116 */
mbed_official 522:aee49fe30179 117
mbed_official 522:aee49fe30179 118 /**
mbed_official 522:aee49fe30179 119 * @}
mbed_official 522:aee49fe30179 120 */
mbed_official 522:aee49fe30179 121 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/