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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

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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_STM32F0/TARGET_NUCLEO_F072RB/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:
431:255afbe6270c 
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 431:255afbe6270c 1 /**
mbed_official 431:255afbe6270c 2 ******************************************************************************
mbed_official 431:255afbe6270c 3 * @file hal_tick.c
mbed_official 431:255afbe6270c 4 * @author MCD Application Team
mbed_official 431:255afbe6270c 5 * @brief Initialization of HAL tick
mbed_official 431:255afbe6270c 6 ******************************************************************************
mbed_official 431:255afbe6270c 7 * @attention
mbed_official 431:255afbe6270c 8 *
mbed_official 431:255afbe6270c 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 431:255afbe6270c 10 *
mbed_official 431:255afbe6270c 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 431:255afbe6270c 12 * are permitted provided that the following conditions are met:
mbed_official 431:255afbe6270c 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 431:255afbe6270c 14 * this list of conditions and the following disclaimer.
mbed_official 431:255afbe6270c 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 431:255afbe6270c 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 431:255afbe6270c 17 * and/or other materials provided with the distribution.
mbed_official 431:255afbe6270c 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 431:255afbe6270c 19 * may be used to endorse or promote products derived from this software
mbed_official 431:255afbe6270c 20 * without specific prior written permission.
mbed_official 431:255afbe6270c 21 *
mbed_official 431:255afbe6270c 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 431:255afbe6270c 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 431:255afbe6270c 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 431:255afbe6270c 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 431:255afbe6270c 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 431:255afbe6270c 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 431:255afbe6270c 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 431:255afbe6270c 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 431:255afbe6270c 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 431:255afbe6270c 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 431:255afbe6270c 32 *
mbed_official 431:255afbe6270c 33 ******************************************************************************
mbed_official 431:255afbe6270c 34 */
mbed_official 431:255afbe6270c 35 #include "hal_tick.h"
mbed_official 431:255afbe6270c 36
mbed_official 431:255afbe6270c 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 431:255afbe6270c 38 uint32_t PreviousVal = 0;
mbed_official 431:255afbe6270c 39
mbed_official 431:255afbe6270c 40 void us_ticker_irq_handler(void);
mbed_official 431:255afbe6270c 41
mbed_official 431:255afbe6270c 42 void timer_irq_handler(void) {
mbed_official 431:255afbe6270c 43 // Channel 1 for mbed timeout
mbed_official 431:255afbe6270c 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 431:255afbe6270c 45 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 431:255afbe6270c 46 us_ticker_irq_handler();
mbed_official 431:255afbe6270c 47 }
mbed_official 431:255afbe6270c 48
mbed_official 431:255afbe6270c 49 // Channel 2 for HAL tick
mbed_official 431:255afbe6270c 50 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 431:255afbe6270c 51 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 431:255afbe6270c 52 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 431:255afbe6270c 53 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 431:255afbe6270c 54 // Increment HAL variable
mbed_official 431:255afbe6270c 55 HAL_IncTick();
mbed_official 431:255afbe6270c 56 // Prepare next interrupt
mbed_official 431:255afbe6270c 57 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 431:255afbe6270c 58 PreviousVal = val;
mbed_official 431:255afbe6270c 59 #if 0 // For DEBUG only
mbed_official 431:255afbe6270c 60 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 431:255afbe6270c 61 #endif
mbed_official 431:255afbe6270c 62 }
mbed_official 431:255afbe6270c 63 }
mbed_official 431:255afbe6270c 64 }
mbed_official 431:255afbe6270c 65
mbed_official 431:255afbe6270c 66 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 431:255afbe6270c 67 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 431:255afbe6270c 68 // Enable timer clock
mbed_official 431:255afbe6270c 69 TIM_MST_RCC;
mbed_official 431:255afbe6270c 70
mbed_official 431:255afbe6270c 71 // Reset timer
mbed_official 431:255afbe6270c 72 TIM_MST_RESET_ON;
mbed_official 431:255afbe6270c 73 TIM_MST_RESET_OFF;
mbed_official 431:255afbe6270c 74
mbed_official 431:255afbe6270c 75 // Update the SystemCoreClock variable
mbed_official 431:255afbe6270c 76 SystemCoreClockUpdate();
mbed_official 431:255afbe6270c 77
mbed_official 431:255afbe6270c 78 // Configure time base
mbed_official 431:255afbe6270c 79 TimMasterHandle.Instance = TIM_MST;
mbed_official 431:255afbe6270c 80 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 431:255afbe6270c 81 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 431:255afbe6270c 82 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 431:255afbe6270c 83 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 431:255afbe6270c 84 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 431:255afbe6270c 85 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 431:255afbe6270c 86
mbed_official 431:255afbe6270c 87 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 431:255afbe6270c 88 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 431:255afbe6270c 89
mbed_official 431:255afbe6270c 90 // Channel 1 for mbed timeout
mbed_official 431:255afbe6270c 91 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 431:255afbe6270c 92
mbed_official 431:255afbe6270c 93 // Channel 2 for HAL tick
mbed_official 431:255afbe6270c 94 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 431:255afbe6270c 95 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 431:255afbe6270c 96 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 431:255afbe6270c 97 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 431:255afbe6270c 98
mbed_official 431:255afbe6270c 99 #if 0 // For DEBUG only
mbed_official 431:255afbe6270c 100 __GPIOB_CLK_ENABLE();
mbed_official 431:255afbe6270c 101 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 431:255afbe6270c 102 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 431:255afbe6270c 103 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 431:255afbe6270c 104 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 431:255afbe6270c 105 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
mbed_official 431:255afbe6270c 106 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 431:255afbe6270c 107 #endif
mbed_official 431:255afbe6270c 108
mbed_official 431:255afbe6270c 109 return HAL_OK;
mbed_official 431:255afbe6270c 110 }
mbed_official 431:255afbe6270c 111
mbed_official 431:255afbe6270c 112 /**
mbed_official 431:255afbe6270c 113 * @}
mbed_official 431:255afbe6270c 114 */
mbed_official 431:255afbe6270c 115
mbed_official 431:255afbe6270c 116 /**
mbed_official 431:255afbe6270c 117 * @}
mbed_official 431:255afbe6270c 118 */
mbed_official 431:255afbe6270c 119
mbed_official 431:255afbe6270c 120 /**
mbed_official 431:255afbe6270c 121 * @}
mbed_official 431:255afbe6270c 122 */
mbed_official 431:255afbe6270c 123 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/