Daiki Kato / mbed-os-lychee

mbed-os for GR-LYCHEE

Dependents:   mbed-os-example-blinky-gr-lychee GR-Boads_Camera_sample GR-Boards_Audio_Recoder GR-Boads_Camera_DisplayApp ... more

drivers/Timer.cpp@0:f782d9c66c49, 2018-02-02 (annotated)

Committer:
dkato
Date:
Fri Feb 02 05:42:23 2018 +0000
Revision:
0:f782d9c66c49
mbed-os for GR-LYCHEE

Who changed what in which revision?

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dkato 0:f782d9c66c49 1 /* mbed Microcontroller Library
dkato 0:f782d9c66c49 2 * Copyright (c) 2006-2013 ARM Limited
dkato 0:f782d9c66c49 3 *
dkato 0:f782d9c66c49 4 * Licensed under the Apache License, Version 2.0 (the "License");
dkato 0:f782d9c66c49 5 * you may not use this file except in compliance with the License.
dkato 0:f782d9c66c49 6 * You may obtain a copy of the License at
dkato 0:f782d9c66c49 7 *
dkato 0:f782d9c66c49 8 * http://www.apache.org/licenses/LICENSE-2.0
dkato 0:f782d9c66c49 9 *
dkato 0:f782d9c66c49 10 * Unless required by applicable law or agreed to in writing, software
dkato 0:f782d9c66c49 11 * distributed under the License is distributed on an "AS IS" BASIS,
dkato 0:f782d9c66c49 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dkato 0:f782d9c66c49 13 * See the License for the specific language governing permissions and
dkato 0:f782d9c66c49 14 * limitations under the License.
dkato 0:f782d9c66c49 15 */
dkato 0:f782d9c66c49 16 #include "drivers/Timer.h"
dkato 0:f782d9c66c49 17 #include "hal/ticker_api.h"
dkato 0:f782d9c66c49 18 #include "hal/us_ticker_api.h"
dkato 0:f782d9c66c49 19 #include "platform/mbed_critical.h"
dkato 0:f782d9c66c49 20
dkato 0:f782d9c66c49 21 namespace mbed {
dkato 0:f782d9c66c49 22
dkato 0:f782d9c66c49 23 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()) {
dkato 0:f782d9c66c49 24 reset();
dkato 0:f782d9c66c49 25 }
dkato 0:f782d9c66c49 26
dkato 0:f782d9c66c49 27 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data) {
dkato 0:f782d9c66c49 28 reset();
dkato 0:f782d9c66c49 29 }
dkato 0:f782d9c66c49 30
dkato 0:f782d9c66c49 31 void Timer::start() {
dkato 0:f782d9c66c49 32 core_util_critical_section_enter();
dkato 0:f782d9c66c49 33 if (!_running) {
dkato 0:f782d9c66c49 34 _start = ticker_read(_ticker_data);
dkato 0:f782d9c66c49 35 _running = 1;
dkato 0:f782d9c66c49 36 }
dkato 0:f782d9c66c49 37 core_util_critical_section_exit();
dkato 0:f782d9c66c49 38 }
dkato 0:f782d9c66c49 39
dkato 0:f782d9c66c49 40 void Timer::stop() {
dkato 0:f782d9c66c49 41 core_util_critical_section_enter();
dkato 0:f782d9c66c49 42 _time += slicetime();
dkato 0:f782d9c66c49 43 _running = 0;
dkato 0:f782d9c66c49 44 core_util_critical_section_exit();
dkato 0:f782d9c66c49 45 }
dkato 0:f782d9c66c49 46
dkato 0:f782d9c66c49 47 int Timer::read_us() {
dkato 0:f782d9c66c49 48 core_util_critical_section_enter();
dkato 0:f782d9c66c49 49 int time = _time + slicetime();
dkato 0:f782d9c66c49 50 core_util_critical_section_exit();
dkato 0:f782d9c66c49 51 return time;
dkato 0:f782d9c66c49 52 }
dkato 0:f782d9c66c49 53
dkato 0:f782d9c66c49 54 float Timer::read() {
dkato 0:f782d9c66c49 55 return (float)read_us() / 1000000.0f;
dkato 0:f782d9c66c49 56 }
dkato 0:f782d9c66c49 57
dkato 0:f782d9c66c49 58 int Timer::read_ms() {
dkato 0:f782d9c66c49 59 return read_us() / 1000;
dkato 0:f782d9c66c49 60 }
dkato 0:f782d9c66c49 61
dkato 0:f782d9c66c49 62 int Timer::slicetime() {
dkato 0:f782d9c66c49 63 core_util_critical_section_enter();
dkato 0:f782d9c66c49 64 int ret = 0;
dkato 0:f782d9c66c49 65 if (_running) {
dkato 0:f782d9c66c49 66 ret = ticker_read(_ticker_data) - _start;
dkato 0:f782d9c66c49 67 }
dkato 0:f782d9c66c49 68 core_util_critical_section_exit();
dkato 0:f782d9c66c49 69 return ret;
dkato 0:f782d9c66c49 70 }
dkato 0:f782d9c66c49 71
dkato 0:f782d9c66c49 72 void Timer::reset() {
dkato 0:f782d9c66c49 73 core_util_critical_section_enter();
dkato 0:f782d9c66c49 74 _start = ticker_read(_ticker_data);
dkato 0:f782d9c66c49 75 _time = 0;
dkato 0:f782d9c66c49 76 core_util_critical_section_exit();
dkato 0:f782d9c66c49 77 }
dkato 0:f782d9c66c49 78
dkato 0:f782d9c66c49 79 Timer::operator float() {
dkato 0:f782d9c66c49 80 return read();
dkato 0:f782d9c66c49 81 }
dkato 0:f782d9c66c49 82
dkato 0:f782d9c66c49 83 } // namespace mbed