mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

drivers/Timer.cpp@181:57724642e740, 2018-02-16 (annotated)

Committer:
AnnaBridge
Date:
Fri Feb 16 16:09:33 2018 +0000
Revision:
181:57724642e740
Parent:
175:af195413fb11
Child:
186:707f6e361f3e
mbed-dev library. Release version 159.

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"
AnnaBridge 175:af195413fb11 20 #include "hal/lp_ticker_api.h"
<> 149:156823d33999 21
<> 149:156823d33999 22 namespace mbed {
<> 149:156823d33999 23
AnnaBridge 175:af195413fb11 24 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()), _lock_deepsleep(true) {
<> 149:156823d33999 25 reset();
<> 149:156823d33999 26 }
<> 149:156823d33999 27
AnnaBridge 175:af195413fb11 28 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data), _lock_deepsleep(true) {
<> 149:156823d33999 29 reset();
AnnaBridge 175:af195413fb11 30 #if DEVICE_LOWPOWERTIMER
AnnaBridge 175:af195413fb11 31 _lock_deepsleep = (data != get_lp_ticker_data());
AnnaBridge 175:af195413fb11 32 #endif
AnnaBridge 175:af195413fb11 33 }
AnnaBridge 175:af195413fb11 34
AnnaBridge 175:af195413fb11 35 Timer::~Timer() {
AnnaBridge 175:af195413fb11 36 core_util_critical_section_enter();
AnnaBridge 175:af195413fb11 37 if (_running) {
AnnaBridge 175:af195413fb11 38 if(_lock_deepsleep) {
AnnaBridge 175:af195413fb11 39 sleep_manager_unlock_deep_sleep();
AnnaBridge 175:af195413fb11 40 }
AnnaBridge 175:af195413fb11 41 }
AnnaBridge 175:af195413fb11 42 _running = 0;
AnnaBridge 175:af195413fb11 43 core_util_critical_section_exit();
<> 149:156823d33999 44 }
<> 149:156823d33999 45
<> 149:156823d33999 46 void Timer::start() {
<> 149:156823d33999 47 core_util_critical_section_enter();
<> 149:156823d33999 48 if (!_running) {
AnnaBridge 175:af195413fb11 49 if(_lock_deepsleep) {
AnnaBridge 175:af195413fb11 50 sleep_manager_lock_deep_sleep();
AnnaBridge 175:af195413fb11 51 }
AnnaBridge 167:e84263d55307 52 _start = ticker_read_us(_ticker_data);
<> 149:156823d33999 53 _running = 1;
<> 149:156823d33999 54 }
<> 149:156823d33999 55 core_util_critical_section_exit();
<> 149:156823d33999 56 }
<> 149:156823d33999 57
<> 149:156823d33999 58 void Timer::stop() {
<> 149:156823d33999 59 core_util_critical_section_enter();
<> 149:156823d33999 60 _time += slicetime();
AnnaBridge 174:b96e65c34a4d 61 if (_running) {
AnnaBridge 175:af195413fb11 62 if(_lock_deepsleep) {
AnnaBridge 175:af195413fb11 63 sleep_manager_unlock_deep_sleep();
AnnaBridge 175:af195413fb11 64 }
AnnaBridge 174:b96e65c34a4d 65 }
<> 149:156823d33999 66 _running = 0;
<> 149:156823d33999 67 core_util_critical_section_exit();
<> 149:156823d33999 68 }
<> 149:156823d33999 69
<> 149:156823d33999 70 int Timer::read_us() {
AnnaBridge 167:e84263d55307 71 return read_high_resolution_us();
<> 149:156823d33999 72 }
<> 149:156823d33999 73
<> 149:156823d33999 74 float Timer::read() {
<> 149:156823d33999 75 return (float)read_us() / 1000000.0f;
<> 149:156823d33999 76 }
<> 149:156823d33999 77
<> 149:156823d33999 78 int Timer::read_ms() {
AnnaBridge 167:e84263d55307 79 return read_high_resolution_us() / 1000;
<> 149:156823d33999 80 }
<> 149:156823d33999 81
AnnaBridge 167:e84263d55307 82 us_timestamp_t Timer::read_high_resolution_us() {
<> 149:156823d33999 83 core_util_critical_section_enter();
AnnaBridge 167:e84263d55307 84 us_timestamp_t time = _time + slicetime();
AnnaBridge 167:e84263d55307 85 core_util_critical_section_exit();
AnnaBridge 167:e84263d55307 86 return time;
AnnaBridge 167:e84263d55307 87 }
AnnaBridge 167:e84263d55307 88
AnnaBridge 167:e84263d55307 89 us_timestamp_t Timer::slicetime() {
AnnaBridge 167:e84263d55307 90 us_timestamp_t ret = 0;
AnnaBridge 167:e84263d55307 91 core_util_critical_section_enter();
<> 149:156823d33999 92 if (_running) {
AnnaBridge 167:e84263d55307 93 ret = ticker_read_us(_ticker_data) - _start;
<> 149:156823d33999 94 }
<> 149:156823d33999 95 core_util_critical_section_exit();
<> 149:156823d33999 96 return ret;
<> 149:156823d33999 97 }
<> 149:156823d33999 98
<> 149:156823d33999 99 void Timer::reset() {
<> 149:156823d33999 100 core_util_critical_section_enter();
AnnaBridge 167:e84263d55307 101 _start = ticker_read_us(_ticker_data);
<> 149:156823d33999 102 _time = 0;
<> 149:156823d33999 103 core_util_critical_section_exit();
<> 149:156823d33999 104 }
<> 149:156823d33999 105
<> 149:156823d33999 106 Timer::operator float() {
<> 149:156823d33999 107 return read();
<> 149:156823d33999 108 }
<> 149:156823d33999 109
<> 149:156823d33999 110 } // namespace mbed