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@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
188:bcfe06ba3d64 
mbed library release version 165

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
AnnaBridge 189:f392fc9709a3 3 * SPDX-License-Identifier: Apache-2.0
<> 149:156823d33999 4 *
<> 149:156823d33999 5 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 6 * you may not use this file except in compliance with the License.
<> 149:156823d33999 7 * You may obtain a copy of the License at
<> 149:156823d33999 8 *
<> 149:156823d33999 9 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 10 *
<> 149:156823d33999 11 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 12 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 14 * See the License for the specific language governing permissions and
<> 149:156823d33999 15 * limitations under the License.
<> 149:156823d33999 16 */
<> 149:156823d33999 17 #include "drivers/Timer.h"
<> 149:156823d33999 18 #include "hal/ticker_api.h"
<> 149:156823d33999 19 #include "hal/us_ticker_api.h"
<> 160:d5399cc887bb 20 #include "platform/mbed_critical.h"
AnnaBridge 175:af195413fb11 21 #include "hal/lp_ticker_api.h"
<> 149:156823d33999 22
<> 149:156823d33999 23 namespace mbed {
<> 149:156823d33999 24
AnnaBridge 187:0387e8f68319 25 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()), _lock_deepsleep(true)
AnnaBridge 187:0387e8f68319 26 {
<> 149:156823d33999 27 reset();
<> 149:156823d33999 28 }
<> 149:156823d33999 29
AnnaBridge 187:0387e8f68319 30 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data), _lock_deepsleep(true)
AnnaBridge 187:0387e8f68319 31 {
<> 149:156823d33999 32 reset();
Anna Bridge 186:707f6e361f3e 33 #if DEVICE_LPTICKER
AnnaBridge 175:af195413fb11 34 _lock_deepsleep = (data != get_lp_ticker_data());
AnnaBridge 175:af195413fb11 35 #endif
AnnaBridge 175:af195413fb11 36 }
AnnaBridge 175:af195413fb11 37
AnnaBridge 187:0387e8f68319 38 Timer::~Timer()
AnnaBridge 187:0387e8f68319 39 {
AnnaBridge 175:af195413fb11 40 core_util_critical_section_enter();
AnnaBridge 175:af195413fb11 41 if (_running) {
AnnaBridge 187:0387e8f68319 42 if (_lock_deepsleep) {
AnnaBridge 175:af195413fb11 43 sleep_manager_unlock_deep_sleep();
AnnaBridge 175:af195413fb11 44 }
AnnaBridge 175:af195413fb11 45 }
AnnaBridge 175:af195413fb11 46 _running = 0;
AnnaBridge 175:af195413fb11 47 core_util_critical_section_exit();
<> 149:156823d33999 48 }
<> 149:156823d33999 49
AnnaBridge 187:0387e8f68319 50 void Timer::start()
AnnaBridge 187:0387e8f68319 51 {
<> 149:156823d33999 52 core_util_critical_section_enter();
<> 149:156823d33999 53 if (!_running) {
AnnaBridge 187:0387e8f68319 54 if (_lock_deepsleep) {
AnnaBridge 175:af195413fb11 55 sleep_manager_lock_deep_sleep();
AnnaBridge 175:af195413fb11 56 }
AnnaBridge 167:e84263d55307 57 _start = ticker_read_us(_ticker_data);
<> 149:156823d33999 58 _running = 1;
<> 149:156823d33999 59 }
<> 149:156823d33999 60 core_util_critical_section_exit();
<> 149:156823d33999 61 }
<> 149:156823d33999 62
AnnaBridge 187:0387e8f68319 63 void Timer::stop()
AnnaBridge 187:0387e8f68319 64 {
<> 149:156823d33999 65 core_util_critical_section_enter();
<> 149:156823d33999 66 _time += slicetime();
AnnaBridge 174:b96e65c34a4d 67 if (_running) {
AnnaBridge 187:0387e8f68319 68 if (_lock_deepsleep) {
AnnaBridge 175:af195413fb11 69 sleep_manager_unlock_deep_sleep();
AnnaBridge 175:af195413fb11 70 }
AnnaBridge 174:b96e65c34a4d 71 }
<> 149:156823d33999 72 _running = 0;
<> 149:156823d33999 73 core_util_critical_section_exit();
<> 149:156823d33999 74 }
<> 149:156823d33999 75
AnnaBridge 187:0387e8f68319 76 int Timer::read_us()
AnnaBridge 187:0387e8f68319 77 {
AnnaBridge 167:e84263d55307 78 return read_high_resolution_us();
<> 149:156823d33999 79 }
<> 149:156823d33999 80
AnnaBridge 187:0387e8f68319 81 float Timer::read()
AnnaBridge 187:0387e8f68319 82 {
AnnaBridge 188:bcfe06ba3d64 83 return (float)read_high_resolution_us() / 1000000.0f;
<> 149:156823d33999 84 }
<> 149:156823d33999 85
AnnaBridge 187:0387e8f68319 86 int Timer::read_ms()
AnnaBridge 187:0387e8f68319 87 {
AnnaBridge 167:e84263d55307 88 return read_high_resolution_us() / 1000;
<> 149:156823d33999 89 }
<> 149:156823d33999 90
AnnaBridge 187:0387e8f68319 91 us_timestamp_t Timer::read_high_resolution_us()
AnnaBridge 187:0387e8f68319 92 {
<> 149:156823d33999 93 core_util_critical_section_enter();
AnnaBridge 167:e84263d55307 94 us_timestamp_t time = _time + slicetime();
AnnaBridge 167:e84263d55307 95 core_util_critical_section_exit();
AnnaBridge 167:e84263d55307 96 return time;
AnnaBridge 167:e84263d55307 97 }
AnnaBridge 167:e84263d55307 98
AnnaBridge 187:0387e8f68319 99 us_timestamp_t Timer::slicetime()
AnnaBridge 187:0387e8f68319 100 {
AnnaBridge 167:e84263d55307 101 us_timestamp_t ret = 0;
AnnaBridge 167:e84263d55307 102 core_util_critical_section_enter();
<> 149:156823d33999 103 if (_running) {
AnnaBridge 167:e84263d55307 104 ret = ticker_read_us(_ticker_data) - _start;
<> 149:156823d33999 105 }
<> 149:156823d33999 106 core_util_critical_section_exit();
<> 149:156823d33999 107 return ret;
<> 149:156823d33999 108 }
<> 149:156823d33999 109
AnnaBridge 187:0387e8f68319 110 void Timer::reset()
AnnaBridge 187:0387e8f68319 111 {
<> 149:156823d33999 112 core_util_critical_section_enter();
AnnaBridge 167:e84263d55307 113 _start = ticker_read_us(_ticker_data);
<> 149:156823d33999 114 _time = 0;
<> 149:156823d33999 115 core_util_critical_section_exit();
<> 149:156823d33999 116 }
<> 149:156823d33999 117
AnnaBridge 187:0387e8f68319 118 Timer::operator float()
AnnaBridge 187:0387e8f68319 119 {
<> 149:156823d33999 120 return read();
<> 149:156823d33999 121 }
<> 149:156823d33999 122
<> 149:156823d33999 123 } // namespace mbed