+++ /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 set_compare(uint16_t count);
-
-extern volatile uint32_t SlaveCounter;
-extern volatile uint32_t oc_int_part;
-extern volatile uint16_t oc_rem_part;
-
-void timer_irq_handler(void) {
- uint16_t cval = TIM_MST->CNT;
-
- TimMasterHandle.Instance = TIM_MST;
-
- // Clear Update interrupt flag
- if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) {
- __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE);
- SlaveCounter++;
- }
-
- // Channel 1 for mbed timeout
- if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
- __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1);
- if (oc_rem_part > 0) {
- set_compare(oc_rem_part); // Finish the remaining time left
- oc_rem_part = 0;
- } else {
- if (oc_int_part > 0) {
- set_compare(0xFFFF);
- oc_rem_part = cval; // To finish the counter loop the next time
- oc_int_part--;
- } else {
- us_ticker_irq_handler();
- }
- }
- }
-
- // Channel 2 for HAL tick
- if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) {
- __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_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;
- }
- }
-}
-
-// 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 us tick
- TimMasterHandle.Init.ClockDivision = 0;
- TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
- HAL_TIM_Base_Init(&TimMasterHandle);
-
- // Configure output compare channel 1 for mbed timeout (enabled later when used)
- HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
-
- // Configure output compare 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);
-
- // Configure interrupts
- // Update interrupt used for 32-bit counter
- // Output compare channel 1 interrupt for mbed timeout
- // Output compare channel 2 interrupt for HAL tick
- NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
- NVIC_EnableIRQ(TIM_MST_IRQ);
-
- // Enable interrupts
- __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_UPDATE); // For 32-bit counter
- __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2); // For HAL tick
-
- // Enable timer
- HAL_TIM_Base_Start(&TimMasterHandle);
-
- return HAL_OK;
-}
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
projects / qmk_firmware.git / blobdiff