MBED-DEV only fro Nucleo STM32F303K8T6
Fork of mbed-dev by
targets/TARGET_STM/TARGET_STM32F3/us_ticker.c
- Committer:
- pravinautosys
- Date:
- 2016-11-19
- Revision:
- 151:acf04f8e7d03
- Parent:
- 149:156823d33999
File content as of revision 151:acf04f8e7d03:
/* mbed Microcontroller Library * Copyright (c) 2014, STMicroelectronics * All rights reserved. * * 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 <stddef.h> #include "us_ticker_api.h" #include "PeripheralNames.h" // 32-bit timer selection #define TIM_MST TIM2 static TIM_HandleTypeDef TimMasterHandle; static int us_ticker_inited = 0; void us_ticker_init(void) { if (us_ticker_inited) return; us_ticker_inited = 1; TimMasterHandle.Instance = TIM_MST; HAL_InitTick(0); // The passed value is not used } uint32_t us_ticker_read() { if (!us_ticker_inited) us_ticker_init(); return TIM_MST->CNT; } void us_ticker_set_interrupt(timestamp_t timestamp) { // Set new output compare value __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp); // Enable IT __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1); } void us_ticker_disable_interrupt(void) { __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1); } void us_ticker_clear_interrupt(void) { __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1); }