Nathan Yonkee / Mbed 2 deprecated Nucleo_sinewave_output_copy

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Dependencies:   mbed

mbed-os/drivers/Timer.cpp@9:d58e77ebd769, 2018-03-02 (annotated)

Committer:
Nathan Yonkee
Date:
Fri Mar 02 07:12:37 2018 -0700
Revision:
9:d58e77ebd769
add mbed-os library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Nathan Yonkee 9:d58e77ebd769 1 /* mbed Microcontroller Library
Nathan Yonkee 9:d58e77ebd769 2 * Copyright (c) 2006-2013 ARM Limited
Nathan Yonkee 9:d58e77ebd769 3 *
Nathan Yonkee 9:d58e77ebd769 4 * Licensed under the Apache License, Version 2.0 (the "License");
Nathan Yonkee 9:d58e77ebd769 5 * you may not use this file except in compliance with the License.
Nathan Yonkee 9:d58e77ebd769 6 * You may obtain a copy of the License at
Nathan Yonkee 9:d58e77ebd769 7 *
Nathan Yonkee 9:d58e77ebd769 8 * http://www.apache.org/licenses/LICENSE-2.0
Nathan Yonkee 9:d58e77ebd769 9 *
Nathan Yonkee 9:d58e77ebd769 10 * Unless required by applicable law or agreed to in writing, software
Nathan Yonkee 9:d58e77ebd769 11 * distributed under the License is distributed on an "AS IS" BASIS,
Nathan Yonkee 9:d58e77ebd769 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Nathan Yonkee 9:d58e77ebd769 13 * See the License for the specific language governing permissions and
Nathan Yonkee 9:d58e77ebd769 14 * limitations under the License.
Nathan Yonkee 9:d58e77ebd769 15 */
Nathan Yonkee 9:d58e77ebd769 16 #include "drivers/Timer.h"
Nathan Yonkee 9:d58e77ebd769 17 #include "hal/ticker_api.h"
Nathan Yonkee 9:d58e77ebd769 18 #include "hal/us_ticker_api.h"
Nathan Yonkee 9:d58e77ebd769 19 #include "platform/mbed_critical.h"
Nathan Yonkee 9:d58e77ebd769 20 #include "hal/lp_ticker_api.h"
Nathan Yonkee 9:d58e77ebd769 21
Nathan Yonkee 9:d58e77ebd769 22 namespace mbed {
Nathan Yonkee 9:d58e77ebd769 23
Nathan Yonkee 9:d58e77ebd769 24 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()), _lock_deepsleep(true) {
Nathan Yonkee 9:d58e77ebd769 25 reset();
Nathan Yonkee 9:d58e77ebd769 26 }
Nathan Yonkee 9:d58e77ebd769 27
Nathan Yonkee 9:d58e77ebd769 28 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data), _lock_deepsleep(true) {
Nathan Yonkee 9:d58e77ebd769 29 reset();
Nathan Yonkee 9:d58e77ebd769 30 #if DEVICE_LOWPOWERTIMER
Nathan Yonkee 9:d58e77ebd769 31 _lock_deepsleep = (data != get_lp_ticker_data());
Nathan Yonkee 9:d58e77ebd769 32 #endif
Nathan Yonkee 9:d58e77ebd769 33 }
Nathan Yonkee 9:d58e77ebd769 34
Nathan Yonkee 9:d58e77ebd769 35 Timer::~Timer() {
Nathan Yonkee 9:d58e77ebd769 36 core_util_critical_section_enter();
Nathan Yonkee 9:d58e77ebd769 37 if (_running) {
Nathan Yonkee 9:d58e77ebd769 38 if(_lock_deepsleep) {
Nathan Yonkee 9:d58e77ebd769 39 sleep_manager_unlock_deep_sleep();
Nathan Yonkee 9:d58e77ebd769 40 }
Nathan Yonkee 9:d58e77ebd769 41 }
Nathan Yonkee 9:d58e77ebd769 42 _running = 0;
Nathan Yonkee 9:d58e77ebd769 43 core_util_critical_section_exit();
Nathan Yonkee 9:d58e77ebd769 44 }
Nathan Yonkee 9:d58e77ebd769 45
Nathan Yonkee 9:d58e77ebd769 46 void Timer::start() {
Nathan Yonkee 9:d58e77ebd769 47 core_util_critical_section_enter();
Nathan Yonkee 9:d58e77ebd769 48 if (!_running) {
Nathan Yonkee 9:d58e77ebd769 49 if(_lock_deepsleep) {
Nathan Yonkee 9:d58e77ebd769 50 sleep_manager_lock_deep_sleep();
Nathan Yonkee 9:d58e77ebd769 51 }
Nathan Yonkee 9:d58e77ebd769 52 _start = ticker_read_us(_ticker_data);
Nathan Yonkee 9:d58e77ebd769 53 _running = 1;
Nathan Yonkee 9:d58e77ebd769 54 }
Nathan Yonkee 9:d58e77ebd769 55 core_util_critical_section_exit();
Nathan Yonkee 9:d58e77ebd769 56 }
Nathan Yonkee 9:d58e77ebd769 57
Nathan Yonkee 9:d58e77ebd769 58 void Timer::stop() {
Nathan Yonkee 9:d58e77ebd769 59 core_util_critical_section_enter();
Nathan Yonkee 9:d58e77ebd769 60 _time += slicetime();
Nathan Yonkee 9:d58e77ebd769 61 if (_running) {
Nathan Yonkee 9:d58e77ebd769 62 if(_lock_deepsleep) {
Nathan Yonkee 9:d58e77ebd769 63 sleep_manager_unlock_deep_sleep();
Nathan Yonkee 9:d58e77ebd769 64 }
Nathan Yonkee 9:d58e77ebd769 65 }
Nathan Yonkee 9:d58e77ebd769 66 _running = 0;
Nathan Yonkee 9:d58e77ebd769 67 core_util_critical_section_exit();
Nathan Yonkee 9:d58e77ebd769 68 }
Nathan Yonkee 9:d58e77ebd769 69
Nathan Yonkee 9:d58e77ebd769 70 int Timer::read_us() {
Nathan Yonkee 9:d58e77ebd769 71 return read_high_resolution_us();
Nathan Yonkee 9:d58e77ebd769 72 }
Nathan Yonkee 9:d58e77ebd769 73
Nathan Yonkee 9:d58e77ebd769 74 float Timer::read() {
Nathan Yonkee 9:d58e77ebd769 75 return (float)read_us() / 1000000.0f;
Nathan Yonkee 9:d58e77ebd769 76 }
Nathan Yonkee 9:d58e77ebd769 77
Nathan Yonkee 9:d58e77ebd769 78 int Timer::read_ms() {
Nathan Yonkee 9:d58e77ebd769 79 return read_high_resolution_us() / 1000;
Nathan Yonkee 9:d58e77ebd769 80 }
Nathan Yonkee 9:d58e77ebd769 81
Nathan Yonkee 9:d58e77ebd769 82 us_timestamp_t Timer::read_high_resolution_us() {
Nathan Yonkee 9:d58e77ebd769 83 core_util_critical_section_enter();
Nathan Yonkee 9:d58e77ebd769 84 us_timestamp_t time = _time + slicetime();
Nathan Yonkee 9:d58e77ebd769 85 core_util_critical_section_exit();
Nathan Yonkee 9:d58e77ebd769 86 return time;
Nathan Yonkee 9:d58e77ebd769 87 }
Nathan Yonkee 9:d58e77ebd769 88
Nathan Yonkee 9:d58e77ebd769 89 us_timestamp_t Timer::slicetime() {
Nathan Yonkee 9:d58e77ebd769 90 us_timestamp_t ret = 0;
Nathan Yonkee 9:d58e77ebd769 91 core_util_critical_section_enter();
Nathan Yonkee 9:d58e77ebd769 92 if (_running) {
Nathan Yonkee 9:d58e77ebd769 93 ret = ticker_read_us(_ticker_data) - _start;
Nathan Yonkee 9:d58e77ebd769 94 }
Nathan Yonkee 9:d58e77ebd769 95 core_util_critical_section_exit();
Nathan Yonkee 9:d58e77ebd769 96 return ret;
Nathan Yonkee 9:d58e77ebd769 97 }
Nathan Yonkee 9:d58e77ebd769 98
Nathan Yonkee 9:d58e77ebd769 99 void Timer::reset() {
Nathan Yonkee 9:d58e77ebd769 100 core_util_critical_section_enter();
Nathan Yonkee 9:d58e77ebd769 101 _start = ticker_read_us(_ticker_data);
Nathan Yonkee 9:d58e77ebd769 102 _time = 0;
Nathan Yonkee 9:d58e77ebd769 103 core_util_critical_section_exit();
Nathan Yonkee 9:d58e77ebd769 104 }
Nathan Yonkee 9:d58e77ebd769 105
Nathan Yonkee 9:d58e77ebd769 106 Timer::operator float() {
Nathan Yonkee 9:d58e77ebd769 107 return read();
Nathan Yonkee 9:d58e77ebd769 108 }
Nathan Yonkee 9:d58e77ebd769 109
Nathan Yonkee 9:d58e77ebd769 110 } // namespace mbed