sai kiran / mbed-src

Watchdog Timer

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L4/TARGET_NUCLEO_L476RG/hal_tick.c@623:db79ecd649d0, 2015-09-16 (annotated)

Committer:
mbed_official
Date:
Wed Sep 16 11:15:09 2015 +0100
Revision:
623:db79ecd649d0
Synchronized with git revision 45d00c36b3132acdfcb75bda6258bd8444ac5392



Full URL: https://github.com/mbedmicro/mbed/commit/45d00c36b3132acdfcb75bda6258bd8444ac5392/



[NUCLEO_L476RG] add hal and target files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 623:db79ecd649d0 1 /**
mbed_official 623:db79ecd649d0 2 ******************************************************************************
mbed_official 623:db79ecd649d0 3 * @file hal_tick.c
mbed_official 623:db79ecd649d0 4 * @author MCD Application Team
mbed_official 623:db79ecd649d0 5 * @brief Initialization of HAL tick
mbed_official 623:db79ecd649d0 6 ******************************************************************************
mbed_official 623:db79ecd649d0 7 * @attention
mbed_official 623:db79ecd649d0 8 *
mbed_official 623:db79ecd649d0 9 * <h2><center>&copy; COPYRIGHT 2015 STMicroelectronics</center></h2>
mbed_official 623:db79ecd649d0 10 *
mbed_official 623:db79ecd649d0 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 623:db79ecd649d0 12 * are permitted provided that the following conditions are met:
mbed_official 623:db79ecd649d0 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 623:db79ecd649d0 14 * this list of conditions and the following disclaimer.
mbed_official 623:db79ecd649d0 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 623:db79ecd649d0 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 623:db79ecd649d0 17 * and/or other materials provided with the distribution.
mbed_official 623:db79ecd649d0 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 623:db79ecd649d0 19 * may be used to endorse or promote products derived from this software
mbed_official 623:db79ecd649d0 20 * without specific prior written permission.
mbed_official 623:db79ecd649d0 21 *
mbed_official 623:db79ecd649d0 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 623:db79ecd649d0 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 623:db79ecd649d0 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 623:db79ecd649d0 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 623:db79ecd649d0 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 623:db79ecd649d0 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 623:db79ecd649d0 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 623:db79ecd649d0 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 623:db79ecd649d0 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 623:db79ecd649d0 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 623:db79ecd649d0 32 *
mbed_official 623:db79ecd649d0 33 ******************************************************************************
mbed_official 623:db79ecd649d0 34 */
mbed_official 623:db79ecd649d0 35 #include "hal_tick.h"
mbed_official 623:db79ecd649d0 36
mbed_official 623:db79ecd649d0 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 623:db79ecd649d0 38 uint32_t PreviousVal = 0;
mbed_official 623:db79ecd649d0 39
mbed_official 623:db79ecd649d0 40 void us_ticker_irq_handler(void);
mbed_official 623:db79ecd649d0 41
mbed_official 623:db79ecd649d0 42 void timer_irq_handler(void) {
mbed_official 623:db79ecd649d0 43 // Channel 1 for mbed timeout
mbed_official 623:db79ecd649d0 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 623:db79ecd649d0 45 us_ticker_irq_handler();
mbed_official 623:db79ecd649d0 46 }
mbed_official 623:db79ecd649d0 47
mbed_official 623:db79ecd649d0 48 // Channel 2 for HAL tick
mbed_official 623:db79ecd649d0 49 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 623:db79ecd649d0 50 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 623:db79ecd649d0 51 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 623:db79ecd649d0 52 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 623:db79ecd649d0 53 // Increment HAL variable
mbed_official 623:db79ecd649d0 54 HAL_IncTick();
mbed_official 623:db79ecd649d0 55 // Prepare next interrupt
mbed_official 623:db79ecd649d0 56 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 623:db79ecd649d0 57 PreviousVal = val;
mbed_official 623:db79ecd649d0 58 #if 0 // For DEBUG only
mbed_official 623:db79ecd649d0 59 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 623:db79ecd649d0 60 #endif
mbed_official 623:db79ecd649d0 61 }
mbed_official 623:db79ecd649d0 62 }
mbed_official 623:db79ecd649d0 63 }
mbed_official 623:db79ecd649d0 64
mbed_official 623:db79ecd649d0 65 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 623:db79ecd649d0 66 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 623:db79ecd649d0 67 // Enable timer clock
mbed_official 623:db79ecd649d0 68 TIM_MST_RCC;
mbed_official 623:db79ecd649d0 69
mbed_official 623:db79ecd649d0 70 // Reset timer
mbed_official 623:db79ecd649d0 71 TIM_MST_RESET_ON;
mbed_official 623:db79ecd649d0 72 TIM_MST_RESET_OFF;
mbed_official 623:db79ecd649d0 73
mbed_official 623:db79ecd649d0 74 // Update the SystemCoreClock variable
mbed_official 623:db79ecd649d0 75 SystemCoreClockUpdate();
mbed_official 623:db79ecd649d0 76
mbed_official 623:db79ecd649d0 77 // Configure time base
mbed_official 623:db79ecd649d0 78 TimMasterHandle.Instance = TIM_MST;
mbed_official 623:db79ecd649d0 79 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 623:db79ecd649d0 80 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 623:db79ecd649d0 81 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 623:db79ecd649d0 82 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 623:db79ecd649d0 83 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 623:db79ecd649d0 84
mbed_official 623:db79ecd649d0 85 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 623:db79ecd649d0 86 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 623:db79ecd649d0 87
mbed_official 623:db79ecd649d0 88 // Channel 1 for mbed timeout
mbed_official 623:db79ecd649d0 89 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 623:db79ecd649d0 90
mbed_official 623:db79ecd649d0 91 // Channel 2 for HAL tick
mbed_official 623:db79ecd649d0 92 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 623:db79ecd649d0 93 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 623:db79ecd649d0 94 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 623:db79ecd649d0 95 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 623:db79ecd649d0 96
mbed_official 623:db79ecd649d0 97 #if 0 // For DEBUG only
mbed_official 623:db79ecd649d0 98 __GPIOB_CLK_ENABLE();
mbed_official 623:db79ecd649d0 99 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 623:db79ecd649d0 100 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 623:db79ecd649d0 101 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 623:db79ecd649d0 102 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 623:db79ecd649d0 103 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
mbed_official 623:db79ecd649d0 104 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 623:db79ecd649d0 105 #endif
mbed_official 623:db79ecd649d0 106
mbed_official 623:db79ecd649d0 107 return HAL_OK;
mbed_official 623:db79ecd649d0 108 }
mbed_official 623:db79ecd649d0 109
mbed_official 623:db79ecd649d0 110 /**
mbed_official 623:db79ecd649d0 111 * @}
mbed_official 623:db79ecd649d0 112 */
mbed_official 623:db79ecd649d0 113
mbed_official 623:db79ecd649d0 114 /**
mbed_official 623:db79ecd649d0 115 * @}
mbed_official 623:db79ecd649d0 116 */
mbed_official 623:db79ecd649d0 117
mbed_official 623:db79ecd649d0 118 /**
mbed_official 623:db79ecd649d0 119 * @}
mbed_official 623:db79ecd649d0 120 */
mbed_official 623:db79ecd649d0 121 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/