Joris Aerts / mbed-src

mbed library sources

Dependents:   Marvino mbot

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32L4/us_ticker.c@610:813dcc80987e, 2015-08-14 (annotated)

Committer:
mbed_official
Date:
Fri Aug 14 13:15:17 2015 +0100
Revision:
610:813dcc80987e
Synchronized with git revision 6d84db41c6833e0b9b024741eb0616a5f62d5599



Full URL: https://github.com/mbedmicro/mbed/commit/6d84db41c6833e0b9b024741eb0616a5f62d5599/



DISCO_F746NG - Improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 610:813dcc80987e 1 /* mbed Microcontroller Library
mbed_official 610:813dcc80987e 2 * Copyright (c) 2015, STMicroelectronics
mbed_official 610:813dcc80987e 3 * All rights reserved.
mbed_official 610:813dcc80987e 4 *
mbed_official 610:813dcc80987e 5 * Redistribution and use in source and binary forms, with or without
mbed_official 610:813dcc80987e 6 * modification, are permitted provided that the following conditions are met:
mbed_official 610:813dcc80987e 7 *
mbed_official 610:813dcc80987e 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 610:813dcc80987e 9 * this list of conditions and the following disclaimer.
mbed_official 610:813dcc80987e 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 610:813dcc80987e 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 610:813dcc80987e 12 * and/or other materials provided with the distribution.
mbed_official 610:813dcc80987e 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 610:813dcc80987e 14 * may be used to endorse or promote products derived from this software
mbed_official 610:813dcc80987e 15 * without specific prior written permission.
mbed_official 610:813dcc80987e 16 *
mbed_official 610:813dcc80987e 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 610:813dcc80987e 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 610:813dcc80987e 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 610:813dcc80987e 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 610:813dcc80987e 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 610:813dcc80987e 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 610:813dcc80987e 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 610:813dcc80987e 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 610:813dcc80987e 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 610:813dcc80987e 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 610:813dcc80987e 27 */
mbed_official 610:813dcc80987e 28 #include <stddef.h>
mbed_official 610:813dcc80987e 29 #include "us_ticker_api.h"
mbed_official 610:813dcc80987e 30 #include "PeripheralNames.h"
mbed_official 610:813dcc80987e 31
mbed_official 610:813dcc80987e 32 #define TIM_MST TIM5
mbed_official 610:813dcc80987e 33
mbed_official 610:813dcc80987e 34 static TIM_HandleTypeDef TimMasterHandle;
mbed_official 610:813dcc80987e 35 static int us_ticker_inited = 0;
mbed_official 610:813dcc80987e 36
mbed_official 610:813dcc80987e 37 void us_ticker_init(void)
mbed_official 610:813dcc80987e 38 {
mbed_official 610:813dcc80987e 39 if (us_ticker_inited) return;
mbed_official 610:813dcc80987e 40 us_ticker_inited = 1;
mbed_official 610:813dcc80987e 41
mbed_official 610:813dcc80987e 42 TimMasterHandle.Instance = TIM_MST;
mbed_official 610:813dcc80987e 43
mbed_official 610:813dcc80987e 44 HAL_InitTick(0); // The passed value is not used
mbed_official 610:813dcc80987e 45 }
mbed_official 610:813dcc80987e 46
mbed_official 610:813dcc80987e 47 uint32_t us_ticker_read()
mbed_official 610:813dcc80987e 48 {
mbed_official 610:813dcc80987e 49 if (!us_ticker_inited) us_ticker_init();
mbed_official 610:813dcc80987e 50 return TIM_MST->CNT;
mbed_official 610:813dcc80987e 51 }
mbed_official 610:813dcc80987e 52
mbed_official 610:813dcc80987e 53 void us_ticker_set_interrupt(timestamp_t timestamp)
mbed_official 610:813dcc80987e 54 {
mbed_official 610:813dcc80987e 55 // Set new output compare value
mbed_official 610:813dcc80987e 56 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp);
mbed_official 610:813dcc80987e 57 // Enable IT
mbed_official 610:813dcc80987e 58 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 610:813dcc80987e 59 }
mbed_official 610:813dcc80987e 60
mbed_official 610:813dcc80987e 61 void us_ticker_disable_interrupt(void)
mbed_official 610:813dcc80987e 62 {
mbed_official 610:813dcc80987e 63 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 610:813dcc80987e 64 }
mbed_official 610:813dcc80987e 65
mbed_official 610:813dcc80987e 66 void us_ticker_clear_interrupt(void)
mbed_official 610:813dcc80987e 67 {
mbed_official 610:813dcc80987e 68 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 610:813dcc80987e 69 }