BA / Mbed OS BaBoRo_test2

Backup 1

mbed-os/drivers/Timer.cpp@0:02dd72d1d465, 2018-04-24 (annotated)

Committer:
borlanic
Date:
Tue Apr 24 11:45:18 2018 +0000
Revision:
0:02dd72d1d465
BaBoRo_test2 - backup 1

Who changed what in which revision?

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borlanic 0:02dd72d1d465 1 /* mbed Microcontroller Library
borlanic 0:02dd72d1d465 2 * Copyright (c) 2006-2013 ARM Limited
borlanic 0:02dd72d1d465 3 *
borlanic 0:02dd72d1d465 4 * Licensed under the Apache License, Version 2.0 (the "License");
borlanic 0:02dd72d1d465 5 * you may not use this file except in compliance with the License.
borlanic 0:02dd72d1d465 6 * You may obtain a copy of the License at
borlanic 0:02dd72d1d465 7 *
borlanic 0:02dd72d1d465 8 * http://www.apache.org/licenses/LICENSE-2.0
borlanic 0:02dd72d1d465 9 *
borlanic 0:02dd72d1d465 10 * Unless required by applicable law or agreed to in writing, software
borlanic 0:02dd72d1d465 11 * distributed under the License is distributed on an "AS IS" BASIS,
borlanic 0:02dd72d1d465 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
borlanic 0:02dd72d1d465 13 * See the License for the specific language governing permissions and
borlanic 0:02dd72d1d465 14 * limitations under the License.
borlanic 0:02dd72d1d465 15 */
borlanic 0:02dd72d1d465 16 #include "drivers/Timer.h"
borlanic 0:02dd72d1d465 17 #include "hal/ticker_api.h"
borlanic 0:02dd72d1d465 18 #include "hal/us_ticker_api.h"
borlanic 0:02dd72d1d465 19 #include "platform/mbed_critical.h"
borlanic 0:02dd72d1d465 20 #include "hal/lp_ticker_api.h"
borlanic 0:02dd72d1d465 21
borlanic 0:02dd72d1d465 22 namespace mbed {
borlanic 0:02dd72d1d465 23
borlanic 0:02dd72d1d465 24 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()), _lock_deepsleep(true) {
borlanic 0:02dd72d1d465 25 reset();
borlanic 0:02dd72d1d465 26 }
borlanic 0:02dd72d1d465 27
borlanic 0:02dd72d1d465 28 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data), _lock_deepsleep(true) {
borlanic 0:02dd72d1d465 29 reset();
borlanic 0:02dd72d1d465 30 #if DEVICE_LOWPOWERTIMER
borlanic 0:02dd72d1d465 31 _lock_deepsleep = (data != get_lp_ticker_data());
borlanic 0:02dd72d1d465 32 #endif
borlanic 0:02dd72d1d465 33 }
borlanic 0:02dd72d1d465 34
borlanic 0:02dd72d1d465 35 Timer::~Timer() {
borlanic 0:02dd72d1d465 36 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 37 if (_running) {
borlanic 0:02dd72d1d465 38 if(_lock_deepsleep) {
borlanic 0:02dd72d1d465 39 sleep_manager_unlock_deep_sleep();
borlanic 0:02dd72d1d465 40 }
borlanic 0:02dd72d1d465 41 }
borlanic 0:02dd72d1d465 42 _running = 0;
borlanic 0:02dd72d1d465 43 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 44 }
borlanic 0:02dd72d1d465 45
borlanic 0:02dd72d1d465 46 void Timer::start() {
borlanic 0:02dd72d1d465 47 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 48 if (!_running) {
borlanic 0:02dd72d1d465 49 if(_lock_deepsleep) {
borlanic 0:02dd72d1d465 50 sleep_manager_lock_deep_sleep();
borlanic 0:02dd72d1d465 51 }
borlanic 0:02dd72d1d465 52 _start = ticker_read_us(_ticker_data);
borlanic 0:02dd72d1d465 53 _running = 1;
borlanic 0:02dd72d1d465 54 }
borlanic 0:02dd72d1d465 55 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 56 }
borlanic 0:02dd72d1d465 57
borlanic 0:02dd72d1d465 58 void Timer::stop() {
borlanic 0:02dd72d1d465 59 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 60 _time += slicetime();
borlanic 0:02dd72d1d465 61 if (_running) {
borlanic 0:02dd72d1d465 62 if(_lock_deepsleep) {
borlanic 0:02dd72d1d465 63 sleep_manager_unlock_deep_sleep();
borlanic 0:02dd72d1d465 64 }
borlanic 0:02dd72d1d465 65 }
borlanic 0:02dd72d1d465 66 _running = 0;
borlanic 0:02dd72d1d465 67 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 68 }
borlanic 0:02dd72d1d465 69
borlanic 0:02dd72d1d465 70 int Timer::read_us() {
borlanic 0:02dd72d1d465 71 return read_high_resolution_us();
borlanic 0:02dd72d1d465 72 }
borlanic 0:02dd72d1d465 73
borlanic 0:02dd72d1d465 74 float Timer::read() {
borlanic 0:02dd72d1d465 75 return (float)read_us() / 1000000.0f;
borlanic 0:02dd72d1d465 76 }
borlanic 0:02dd72d1d465 77
borlanic 0:02dd72d1d465 78 int Timer::read_ms() {
borlanic 0:02dd72d1d465 79 return read_high_resolution_us() / 1000;
borlanic 0:02dd72d1d465 80 }
borlanic 0:02dd72d1d465 81
borlanic 0:02dd72d1d465 82 us_timestamp_t Timer::read_high_resolution_us() {
borlanic 0:02dd72d1d465 83 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 84 us_timestamp_t time = _time + slicetime();
borlanic 0:02dd72d1d465 85 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 86 return time;
borlanic 0:02dd72d1d465 87 }
borlanic 0:02dd72d1d465 88
borlanic 0:02dd72d1d465 89 us_timestamp_t Timer::slicetime() {
borlanic 0:02dd72d1d465 90 us_timestamp_t ret = 0;
borlanic 0:02dd72d1d465 91 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 92 if (_running) {
borlanic 0:02dd72d1d465 93 ret = ticker_read_us(_ticker_data) - _start;
borlanic 0:02dd72d1d465 94 }
borlanic 0:02dd72d1d465 95 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 96 return ret;
borlanic 0:02dd72d1d465 97 }
borlanic 0:02dd72d1d465 98
borlanic 0:02dd72d1d465 99 void Timer::reset() {
borlanic 0:02dd72d1d465 100 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 101 _start = ticker_read_us(_ticker_data);
borlanic 0:02dd72d1d465 102 _time = 0;
borlanic 0:02dd72d1d465 103 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 104 }
borlanic 0:02dd72d1d465 105
borlanic 0:02dd72d1d465 106 Timer::operator float() {
borlanic 0:02dd72d1d465 107 return read();
borlanic 0:02dd72d1d465 108 }
borlanic 0:02dd72d1d465 109
borlanic 0:02dd72d1d465 110 } // namespace mbed