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drivers/Timer.cpp@175:b96e65c34a4d, 2017-10-02 (annotated)

Committer:
AnnaBridge
Date:
Mon Oct 02 15:33:19 2017 +0100
Revision:
175:b96e65c34a4d
Parent:
168:e84263d55307
Child:
176:af195413fb11
This updates the lib to the mbed lib v 152

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2006-2013 ARM Limited
<> 149:156823d33999 3 *
<> 149:156823d33999 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 5 * you may not use this file except in compliance with the License.
<> 149:156823d33999 6 * You may obtain a copy of the License at
<> 149:156823d33999 7 *
<> 149:156823d33999 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 9 *
<> 149:156823d33999 10 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 13 * See the License for the specific language governing permissions and
<> 149:156823d33999 14 * limitations under the License.
<> 149:156823d33999 15 */
<> 149:156823d33999 16 #include "drivers/Timer.h"
<> 149:156823d33999 17 #include "hal/ticker_api.h"
<> 149:156823d33999 18 #include "hal/us_ticker_api.h"
<> 160:d5399cc887bb 19 #include "platform/mbed_critical.h"
<> 149:156823d33999 20
<> 149:156823d33999 21 namespace mbed {
<> 149:156823d33999 22
<> 149:156823d33999 23 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()) {
<> 149:156823d33999 24 reset();
<> 149:156823d33999 25 }
<> 149:156823d33999 26
<> 149:156823d33999 27 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data) {
<> 149:156823d33999 28 reset();
<> 149:156823d33999 29 }
<> 149:156823d33999 30
<> 149:156823d33999 31 void Timer::start() {
<> 149:156823d33999 32 core_util_critical_section_enter();
<> 149:156823d33999 33 if (!_running) {
AnnaBridge 175:b96e65c34a4d 34 sleep_manager_lock_deep_sleep();
AnnaBridge 168:e84263d55307 35 _start = ticker_read_us(_ticker_data);
<> 149:156823d33999 36 _running = 1;
<> 149:156823d33999 37 }
<> 149:156823d33999 38 core_util_critical_section_exit();
<> 149:156823d33999 39 }
<> 149:156823d33999 40
<> 149:156823d33999 41 void Timer::stop() {
<> 149:156823d33999 42 core_util_critical_section_enter();
<> 149:156823d33999 43 _time += slicetime();
AnnaBridge 175:b96e65c34a4d 44 if (_running) {
AnnaBridge 175:b96e65c34a4d 45 sleep_manager_unlock_deep_sleep();
AnnaBridge 175:b96e65c34a4d 46 }
<> 149:156823d33999 47 _running = 0;
<> 149:156823d33999 48 core_util_critical_section_exit();
<> 149:156823d33999 49 }
<> 149:156823d33999 50
<> 149:156823d33999 51 int Timer::read_us() {
AnnaBridge 168:e84263d55307 52 return read_high_resolution_us();
<> 149:156823d33999 53 }
<> 149:156823d33999 54
<> 149:156823d33999 55 float Timer::read() {
<> 149:156823d33999 56 return (float)read_us() / 1000000.0f;
<> 149:156823d33999 57 }
<> 149:156823d33999 58
<> 149:156823d33999 59 int Timer::read_ms() {
AnnaBridge 168:e84263d55307 60 return read_high_resolution_us() / 1000;
<> 149:156823d33999 61 }
<> 149:156823d33999 62
AnnaBridge 168:e84263d55307 63 us_timestamp_t Timer::read_high_resolution_us() {
<> 149:156823d33999 64 core_util_critical_section_enter();
AnnaBridge 168:e84263d55307 65 us_timestamp_t time = _time + slicetime();
AnnaBridge 168:e84263d55307 66 core_util_critical_section_exit();
AnnaBridge 168:e84263d55307 67 return time;
AnnaBridge 168:e84263d55307 68 }
AnnaBridge 168:e84263d55307 69
AnnaBridge 168:e84263d55307 70 us_timestamp_t Timer::slicetime() {
AnnaBridge 168:e84263d55307 71 us_timestamp_t ret = 0;
AnnaBridge 168:e84263d55307 72 core_util_critical_section_enter();
<> 149:156823d33999 73 if (_running) {
AnnaBridge 168:e84263d55307 74 ret = ticker_read_us(_ticker_data) - _start;
<> 149:156823d33999 75 }
<> 149:156823d33999 76 core_util_critical_section_exit();
<> 149:156823d33999 77 return ret;
<> 149:156823d33999 78 }
<> 149:156823d33999 79
<> 149:156823d33999 80 void Timer::reset() {
<> 149:156823d33999 81 core_util_critical_section_enter();
AnnaBridge 168:e84263d55307 82 _start = ticker_read_us(_ticker_data);
<> 149:156823d33999 83 _time = 0;
<> 149:156823d33999 84 core_util_critical_section_exit();
<> 149:156823d33999 85 }
<> 149:156823d33999 86
<> 149:156823d33999 87 Timer::operator float() {
<> 149:156823d33999 88 return read();
<> 149:156823d33999 89 }
<> 149:156823d33999 90
<> 149:156823d33999 91 } // namespace mbed