Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32F7/us_ticker.c@153:9398a535854b, 2016-12-22 (annotated)

Committer:
fwndz
Date:
Thu Dec 22 05:12:40 2016 +0000
Revision:
153:9398a535854b
Parent:
149:156823d33999 
device target maximize

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015, STMicroelectronics
<> 144:ef7eb2e8f9f7 3 * All rights reserved.
<> 144:ef7eb2e8f9f7 4 *
<> 144:ef7eb2e8f9f7 5 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 6 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 9 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 11 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 12 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 14 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 15 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 16 *
<> 144:ef7eb2e8f9f7 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 27 */
<> 144:ef7eb2e8f9f7 28 #include <stddef.h>
<> 144:ef7eb2e8f9f7 29 #include "us_ticker_api.h"
<> 144:ef7eb2e8f9f7 30 #include "PeripheralNames.h"
<> 144:ef7eb2e8f9f7 31 #include "hal_tick.h"
<> 144:ef7eb2e8f9f7 32
<> 144:ef7eb2e8f9f7 33 #define TIM_MST TIM5
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 static TIM_HandleTypeDef TimMasterHandle;
<> 144:ef7eb2e8f9f7 36 static int us_ticker_inited = 0;
<> 144:ef7eb2e8f9f7 37
<> 144:ef7eb2e8f9f7 38 void us_ticker_init(void)
<> 144:ef7eb2e8f9f7 39 {
<> 144:ef7eb2e8f9f7 40 if (us_ticker_inited) return;
<> 144:ef7eb2e8f9f7 41 us_ticker_inited = 1;
<> 144:ef7eb2e8f9f7 42
<> 144:ef7eb2e8f9f7 43 TimMasterHandle.Instance = TIM_MST;
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 HAL_InitTick(0); // The passed value is not used
<> 144:ef7eb2e8f9f7 46 }
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 uint32_t us_ticker_read()
<> 144:ef7eb2e8f9f7 49 {
<> 144:ef7eb2e8f9f7 50 if (!us_ticker_inited) us_ticker_init();
<> 144:ef7eb2e8f9f7 51 return TIM_MST->CNT;
<> 144:ef7eb2e8f9f7 52 }
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 void us_ticker_set_interrupt(timestamp_t timestamp)
<> 144:ef7eb2e8f9f7 55 {
<> 144:ef7eb2e8f9f7 56 // Set new output compare value
<> 144:ef7eb2e8f9f7 57 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp);
<> 144:ef7eb2e8f9f7 58 // Enable IT
<> 144:ef7eb2e8f9f7 59 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 void us_ticker_disable_interrupt(void)
<> 144:ef7eb2e8f9f7 63 {
<> 144:ef7eb2e8f9f7 64 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
<> 144:ef7eb2e8f9f7 65 }
<> 144:ef7eb2e8f9f7 66
<> 144:ef7eb2e8f9f7 67 void us_ticker_clear_interrupt(void)
<> 144:ef7eb2e8f9f7 68 {
<> 144:ef7eb2e8f9f7 69 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
<> 144:ef7eb2e8f9f7 70 }