Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/drivers/Timer.cpp@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

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marcozecchini 0:9fca2b23d0ba 1 /* mbed Microcontroller Library
marcozecchini 0:9fca2b23d0ba 2 * Copyright (c) 2006-2013 ARM Limited
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Licensed under the Apache License, Version 2.0 (the "License");
marcozecchini 0:9fca2b23d0ba 5 * you may not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 6 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 7 *
marcozecchini 0:9fca2b23d0ba 8 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 9 *
marcozecchini 0:9fca2b23d0ba 10 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 11 * distributed under the License is distributed on an "AS IS" BASIS,
marcozecchini 0:9fca2b23d0ba 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 13 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 14 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 15 */
marcozecchini 0:9fca2b23d0ba 16 #include "drivers/Timer.h"
marcozecchini 0:9fca2b23d0ba 17 #include "hal/ticker_api.h"
marcozecchini 0:9fca2b23d0ba 18 #include "hal/us_ticker_api.h"
marcozecchini 0:9fca2b23d0ba 19 #include "platform/mbed_critical.h"
marcozecchini 0:9fca2b23d0ba 20 #include "hal/lp_ticker_api.h"
marcozecchini 0:9fca2b23d0ba 21
marcozecchini 0:9fca2b23d0ba 22 namespace mbed {
marcozecchini 0:9fca2b23d0ba 23
marcozecchini 0:9fca2b23d0ba 24 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()), _lock_deepsleep(true) {
marcozecchini 0:9fca2b23d0ba 25 reset();
marcozecchini 0:9fca2b23d0ba 26 }
marcozecchini 0:9fca2b23d0ba 27
marcozecchini 0:9fca2b23d0ba 28 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data), _lock_deepsleep(true) {
marcozecchini 0:9fca2b23d0ba 29 reset();
marcozecchini 0:9fca2b23d0ba 30 #if DEVICE_LOWPOWERTIMER
marcozecchini 0:9fca2b23d0ba 31 _lock_deepsleep = (data != get_lp_ticker_data());
marcozecchini 0:9fca2b23d0ba 32 #endif
marcozecchini 0:9fca2b23d0ba 33 }
marcozecchini 0:9fca2b23d0ba 34
marcozecchini 0:9fca2b23d0ba 35 Timer::~Timer() {
marcozecchini 0:9fca2b23d0ba 36 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 37 if (_running) {
marcozecchini 0:9fca2b23d0ba 38 if(_lock_deepsleep) {
marcozecchini 0:9fca2b23d0ba 39 sleep_manager_unlock_deep_sleep();
marcozecchini 0:9fca2b23d0ba 40 }
marcozecchini 0:9fca2b23d0ba 41 }
marcozecchini 0:9fca2b23d0ba 42 _running = 0;
marcozecchini 0:9fca2b23d0ba 43 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 44 }
marcozecchini 0:9fca2b23d0ba 45
marcozecchini 0:9fca2b23d0ba 46 void Timer::start() {
marcozecchini 0:9fca2b23d0ba 47 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 48 if (!_running) {
marcozecchini 0:9fca2b23d0ba 49 if(_lock_deepsleep) {
marcozecchini 0:9fca2b23d0ba 50 sleep_manager_lock_deep_sleep();
marcozecchini 0:9fca2b23d0ba 51 }
marcozecchini 0:9fca2b23d0ba 52 _start = ticker_read_us(_ticker_data);
marcozecchini 0:9fca2b23d0ba 53 _running = 1;
marcozecchini 0:9fca2b23d0ba 54 }
marcozecchini 0:9fca2b23d0ba 55 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 56 }
marcozecchini 0:9fca2b23d0ba 57
marcozecchini 0:9fca2b23d0ba 58 void Timer::stop() {
marcozecchini 0:9fca2b23d0ba 59 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 60 _time += slicetime();
marcozecchini 0:9fca2b23d0ba 61 if (_running) {
marcozecchini 0:9fca2b23d0ba 62 if(_lock_deepsleep) {
marcozecchini 0:9fca2b23d0ba 63 sleep_manager_unlock_deep_sleep();
marcozecchini 0:9fca2b23d0ba 64 }
marcozecchini 0:9fca2b23d0ba 65 }
marcozecchini 0:9fca2b23d0ba 66 _running = 0;
marcozecchini 0:9fca2b23d0ba 67 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 68 }
marcozecchini 0:9fca2b23d0ba 69
marcozecchini 0:9fca2b23d0ba 70 int Timer::read_us() {
marcozecchini 0:9fca2b23d0ba 71 return read_high_resolution_us();
marcozecchini 0:9fca2b23d0ba 72 }
marcozecchini 0:9fca2b23d0ba 73
marcozecchini 0:9fca2b23d0ba 74 float Timer::read() {
marcozecchini 0:9fca2b23d0ba 75 return (float)read_us() / 1000000.0f;
marcozecchini 0:9fca2b23d0ba 76 }
marcozecchini 0:9fca2b23d0ba 77
marcozecchini 0:9fca2b23d0ba 78 int Timer::read_ms() {
marcozecchini 0:9fca2b23d0ba 79 return read_high_resolution_us() / 1000;
marcozecchini 0:9fca2b23d0ba 80 }
marcozecchini 0:9fca2b23d0ba 81
marcozecchini 0:9fca2b23d0ba 82 us_timestamp_t Timer::read_high_resolution_us() {
marcozecchini 0:9fca2b23d0ba 83 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 84 us_timestamp_t time = _time + slicetime();
marcozecchini 0:9fca2b23d0ba 85 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 86 return time;
marcozecchini 0:9fca2b23d0ba 87 }
marcozecchini 0:9fca2b23d0ba 88
marcozecchini 0:9fca2b23d0ba 89 us_timestamp_t Timer::slicetime() {
marcozecchini 0:9fca2b23d0ba 90 us_timestamp_t ret = 0;
marcozecchini 0:9fca2b23d0ba 91 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 92 if (_running) {
marcozecchini 0:9fca2b23d0ba 93 ret = ticker_read_us(_ticker_data) - _start;
marcozecchini 0:9fca2b23d0ba 94 }
marcozecchini 0:9fca2b23d0ba 95 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 96 return ret;
marcozecchini 0:9fca2b23d0ba 97 }
marcozecchini 0:9fca2b23d0ba 98
marcozecchini 0:9fca2b23d0ba 99 void Timer::reset() {
marcozecchini 0:9fca2b23d0ba 100 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 101 _start = ticker_read_us(_ticker_data);
marcozecchini 0:9fca2b23d0ba 102 _time = 0;
marcozecchini 0:9fca2b23d0ba 103 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 104 }
marcozecchini 0:9fca2b23d0ba 105
marcozecchini 0:9fca2b23d0ba 106 Timer::operator float() {
marcozecchini 0:9fca2b23d0ba 107 return read();
marcozecchini 0:9fca2b23d0ba 108 }
marcozecchini 0:9fca2b23d0ba 109
marcozecchini 0:9fca2b23d0ba 110 } // namespace mbed