+++ /dev/null
-/**
- ******************************************************************************
- * @file hal_tick.c
- * @author MCD Application Team
- * @brief Initialization of HAL tick
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- ******************************************************************************
- */
-#include "hal_tick.h"
-
-TIM_HandleTypeDef TimMasterHandle;
-uint32_t PreviousVal = 0;
-
-void us_ticker_irq_handler(void);
-
-void timer_irq_handler(void) {
- // Channel 1 for mbed timeout
- if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
- __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
- us_ticker_irq_handler();
- }
-
- // Channel 2 for HAL tick
- if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
- __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
- uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
- if ((val - PreviousVal) >= HAL_TICK_DELAY) {
- // Increment HAL variable
- HAL_IncTick();
- // Prepare next interrupt
- __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
- PreviousVal = val;
-#if 0 // For DEBUG only
- HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
-#endif
- }
- }
-}
-
-// Reconfigure the HAL tick using a standard timer instead of systick.
-HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
- // Enable timer clock
- TIM_MST_RCC;
-
- // Reset timer
- TIM_MST_RESET_ON;
- TIM_MST_RESET_OFF;
-
- // Update the SystemCoreClock variable
- SystemCoreClockUpdate();
-
- // Configure time base
- TimMasterHandle.Instance = TIM_MST;
- TimMasterHandle.Init.Period = 0xFFFFFFFF;
- TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
- TimMasterHandle.Init.ClockDivision = 0;
- TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
- TimMasterHandle.Init.RepetitionCounter = 0;
- HAL_TIM_OC_Init(&TimMasterHandle);
-
- NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
- NVIC_EnableIRQ(TIM_MST_IRQ);
-
- // Channel 1 for mbed timeout
- HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
-
- // Channel 2 for HAL tick
- HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
- PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
- __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
- __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
-
-#if 0 // For DEBUG only
- __GPIOB_CLK_ENABLE();
- GPIO_InitTypeDef GPIO_InitStruct;
- GPIO_InitStruct.Pin = GPIO_PIN_6;
- GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
- GPIO_InitStruct.Pull = GPIO_PULLUP;
- GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
- HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
-#endif
-
- return HAL_OK;
-}
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/