mirror of https://github.com/ARMmbed/mbed-os.git
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2015, STMicroelectronics
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stddef.h>
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#include "us_ticker_api.h"
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#include "PeripheralNames.h"
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#if defined(TIM5_BASE)
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#define TIM_MST TIM5
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#else
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#define TIM_MST TIM2
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#endif
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static TIM_HandleTypeDef TimMasterHandle;
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static int us_ticker_inited = 0;
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void us_ticker_init(void)
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{
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if (us_ticker_inited) return;
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us_ticker_inited = 1;
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TimMasterHandle.Instance = TIM_MST;
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HAL_InitTick(0); // The passed value is not used
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}
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uint32_t us_ticker_read()
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{
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if (!us_ticker_inited) us_ticker_init();
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return TIM_MST->CNT;
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}
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void us_ticker_set_interrupt(timestamp_t timestamp)
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{
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// Set new output compare value
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__HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp);
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// Enable IT
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__HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
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}
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void us_ticker_disable_interrupt(void)
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{
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__HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
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}
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void us_ticker_clear_interrupt(void)
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{
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__HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
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}
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