mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
targets/cmsis/TARGET_STM/TARGET_NUCLEO_F411RE/hal_tick.c
- Committer:
- mbed_official
- Date:
- 2014-06-23
- Revision:
- 235:685d5f11838f
File content as of revision 235:685d5f11838f:
/** ****************************************************************************** * @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) { 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_FAST; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); #endif return HAL_OK; } /** * @} */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/