Ermanno Brusadin / mbed

mbed library sources

Dependents:   FRDM-KL46Z_LCD_Test FRDM-KL46Z_LCD_Test FRDM-KL46Z_Plantilla FRDM-KL46Z_Plantilla ... more

targets/hal/TARGET_STM/TARGET_STM32F407VG/us_ticker.c@0:6bc4ac881c8e, 2016-07-28 (annotated)

Committer:
ebrus
Date:
Thu Jul 28 15:56:34 2016 +0000
Revision:
0:6bc4ac881c8e
1;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ebrus 0:6bc4ac881c8e 1 /* mbed Microcontroller Library
ebrus 0:6bc4ac881c8e 2 * Copyright (c) 2014, STMicroelectronics
ebrus 0:6bc4ac881c8e 3 * All rights reserved.
ebrus 0:6bc4ac881c8e 4 *
ebrus 0:6bc4ac881c8e 5 * Redistribution and use in source and binary forms, with or without
ebrus 0:6bc4ac881c8e 6 * modification, are permitted provided that the following conditions are met:
ebrus 0:6bc4ac881c8e 7 *
ebrus 0:6bc4ac881c8e 8 * 1. Redistributions of source code must retain the above copyright notice,
ebrus 0:6bc4ac881c8e 9 * this list of conditions and the following disclaimer.
ebrus 0:6bc4ac881c8e 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
ebrus 0:6bc4ac881c8e 11 * this list of conditions and the following disclaimer in the documentation
ebrus 0:6bc4ac881c8e 12 * and/or other materials provided with the distribution.
ebrus 0:6bc4ac881c8e 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
ebrus 0:6bc4ac881c8e 14 * may be used to endorse or promote products derived from this software
ebrus 0:6bc4ac881c8e 15 * without specific prior written permission.
ebrus 0:6bc4ac881c8e 16 *
ebrus 0:6bc4ac881c8e 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ebrus 0:6bc4ac881c8e 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ebrus 0:6bc4ac881c8e 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
ebrus 0:6bc4ac881c8e 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
ebrus 0:6bc4ac881c8e 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ebrus 0:6bc4ac881c8e 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
ebrus 0:6bc4ac881c8e 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
ebrus 0:6bc4ac881c8e 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
ebrus 0:6bc4ac881c8e 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
ebrus 0:6bc4ac881c8e 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ebrus 0:6bc4ac881c8e 27 */
ebrus 0:6bc4ac881c8e 28 #include <stddef.h>
ebrus 0:6bc4ac881c8e 29 #include "us_ticker_api.h"
ebrus 0:6bc4ac881c8e 30 #include "PeripheralNames.h"
ebrus 0:6bc4ac881c8e 31
ebrus 0:6bc4ac881c8e 32 #define TIM_MST TIM5
ebrus 0:6bc4ac881c8e 33
ebrus 0:6bc4ac881c8e 34 static TIM_HandleTypeDef TimMasterHandle;
ebrus 0:6bc4ac881c8e 35 static int us_ticker_inited = 0;
ebrus 0:6bc4ac881c8e 36
ebrus 0:6bc4ac881c8e 37 void us_ticker_init(void) {
ebrus 0:6bc4ac881c8e 38 if (us_ticker_inited) return;
ebrus 0:6bc4ac881c8e 39 us_ticker_inited = 1;
ebrus 0:6bc4ac881c8e 40
ebrus 0:6bc4ac881c8e 41 TimMasterHandle.Instance = TIM_MST;
ebrus 0:6bc4ac881c8e 42
ebrus 0:6bc4ac881c8e 43 HAL_InitTick(0); // The passed value is not used
ebrus 0:6bc4ac881c8e 44 }
ebrus 0:6bc4ac881c8e 45
ebrus 0:6bc4ac881c8e 46 uint32_t us_ticker_read() {
ebrus 0:6bc4ac881c8e 47 if (!us_ticker_inited) us_ticker_init();
ebrus 0:6bc4ac881c8e 48 return TIM_MST->CNT;
ebrus 0:6bc4ac881c8e 49 }
ebrus 0:6bc4ac881c8e 50
ebrus 0:6bc4ac881c8e 51 void us_ticker_set_interrupt(timestamp_t timestamp) {
ebrus 0:6bc4ac881c8e 52 // Set new output compare value
ebrus 0:6bc4ac881c8e 53 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp);
ebrus 0:6bc4ac881c8e 54 // Enable IT
ebrus 0:6bc4ac881c8e 55 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
ebrus 0:6bc4ac881c8e 56 }
ebrus 0:6bc4ac881c8e 57
ebrus 0:6bc4ac881c8e 58 void us_ticker_disable_interrupt(void) {
ebrus 0:6bc4ac881c8e 59 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
ebrus 0:6bc4ac881c8e 60 }
ebrus 0:6bc4ac881c8e 61
ebrus 0:6bc4ac881c8e 62 void us_ticker_clear_interrupt(void) {
ebrus 0:6bc4ac881c8e 63 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
ebrus 0:6bc4ac881c8e 64 }