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@187:0387e8f68319, 2018-09-06 (annotated)

Committer:
AnnaBridge
Date:
Thu Sep 06 13:40:20 2018 +0100
Revision:
187:0387e8f68319
Parent:
186:707f6e361f3e
Child:
188:bcfe06ba3d64
mbed-dev library. Release version 163

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 187:0387e8f68319 24 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()), _lock_deepsleep(true)
AnnaBridge 187:0387e8f68319 25 {
<> 149:156823d33999 26 reset();
<> 149:156823d33999 27 }
<> 149:156823d33999 28
AnnaBridge 187:0387e8f68319 29 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data), _lock_deepsleep(true)
AnnaBridge 187:0387e8f68319 30 {
<> 149:156823d33999 31 reset();
Anna Bridge 186:707f6e361f3e 32 #if DEVICE_LPTICKER
AnnaBridge 175:af195413fb11 33 _lock_deepsleep = (data != get_lp_ticker_data());
AnnaBridge 175:af195413fb11 34 #endif
AnnaBridge 175:af195413fb11 35 }
AnnaBridge 175:af195413fb11 36
AnnaBridge 187:0387e8f68319 37 Timer::~Timer()
AnnaBridge 187:0387e8f68319 38 {
AnnaBridge 175:af195413fb11 39 core_util_critical_section_enter();
AnnaBridge 175:af195413fb11 40 if (_running) {
AnnaBridge 187:0387e8f68319 41 if (_lock_deepsleep) {
AnnaBridge 175:af195413fb11 42 sleep_manager_unlock_deep_sleep();
AnnaBridge 175:af195413fb11 43 }
AnnaBridge 175:af195413fb11 44 }
AnnaBridge 175:af195413fb11 45 _running = 0;
AnnaBridge 175:af195413fb11 46 core_util_critical_section_exit();
<> 149:156823d33999 47 }
<> 149:156823d33999 48
AnnaBridge 187:0387e8f68319 49 void Timer::start()
AnnaBridge 187:0387e8f68319 50 {
<> 149:156823d33999 51 core_util_critical_section_enter();
<> 149:156823d33999 52 if (!_running) {
AnnaBridge 187:0387e8f68319 53 if (_lock_deepsleep) {
AnnaBridge 175:af195413fb11 54 sleep_manager_lock_deep_sleep();
AnnaBridge 175:af195413fb11 55 }
AnnaBridge 167:e84263d55307 56 _start = ticker_read_us(_ticker_data);
<> 149:156823d33999 57 _running = 1;
<> 149:156823d33999 58 }
<> 149:156823d33999 59 core_util_critical_section_exit();
<> 149:156823d33999 60 }
<> 149:156823d33999 61
AnnaBridge 187:0387e8f68319 62 void Timer::stop()
AnnaBridge 187:0387e8f68319 63 {
<> 149:156823d33999 64 core_util_critical_section_enter();
<> 149:156823d33999 65 _time += slicetime();
AnnaBridge 174:b96e65c34a4d 66 if (_running) {
AnnaBridge 187:0387e8f68319 67 if (_lock_deepsleep) {
AnnaBridge 175:af195413fb11 68 sleep_manager_unlock_deep_sleep();
AnnaBridge 175:af195413fb11 69 }
AnnaBridge 174:b96e65c34a4d 70 }
<> 149:156823d33999 71 _running = 0;
<> 149:156823d33999 72 core_util_critical_section_exit();
<> 149:156823d33999 73 }
<> 149:156823d33999 74
AnnaBridge 187:0387e8f68319 75 int Timer::read_us()
AnnaBridge 187:0387e8f68319 76 {
AnnaBridge 167:e84263d55307 77 return read_high_resolution_us();
<> 149:156823d33999 78 }
<> 149:156823d33999 79
AnnaBridge 187:0387e8f68319 80 float Timer::read()
AnnaBridge 187:0387e8f68319 81 {
<> 149:156823d33999 82 return (float)read_us() / 1000000.0f;
<> 149:156823d33999 83 }
<> 149:156823d33999 84
AnnaBridge 187:0387e8f68319 85 int Timer::read_ms()
AnnaBridge 187:0387e8f68319 86 {
AnnaBridge 167:e84263d55307 87 return read_high_resolution_us() / 1000;
<> 149:156823d33999 88 }
<> 149:156823d33999 89
AnnaBridge 187:0387e8f68319 90 us_timestamp_t Timer::read_high_resolution_us()
AnnaBridge 187:0387e8f68319 91 {
<> 149:156823d33999 92 core_util_critical_section_enter();
AnnaBridge 167:e84263d55307 93 us_timestamp_t time = _time + slicetime();
AnnaBridge 167:e84263d55307 94 core_util_critical_section_exit();
AnnaBridge 167:e84263d55307 95 return time;
AnnaBridge 167:e84263d55307 96 }
AnnaBridge 167:e84263d55307 97
AnnaBridge 187:0387e8f68319 98 us_timestamp_t Timer::slicetime()
AnnaBridge 187:0387e8f68319 99 {
AnnaBridge 167:e84263d55307 100 us_timestamp_t ret = 0;
AnnaBridge 167:e84263d55307 101 core_util_critical_section_enter();
<> 149:156823d33999 102 if (_running) {
AnnaBridge 167:e84263d55307 103 ret = ticker_read_us(_ticker_data) - _start;
<> 149:156823d33999 104 }
<> 149:156823d33999 105 core_util_critical_section_exit();
<> 149:156823d33999 106 return ret;
<> 149:156823d33999 107 }
<> 149:156823d33999 108
AnnaBridge 187:0387e8f68319 109 void Timer::reset()
AnnaBridge 187:0387e8f68319 110 {
<> 149:156823d33999 111 core_util_critical_section_enter();
AnnaBridge 167:e84263d55307 112 _start = ticker_read_us(_ticker_data);
<> 149:156823d33999 113 _time = 0;
<> 149:156823d33999 114 core_util_critical_section_exit();
<> 149:156823d33999 115 }
<> 149:156823d33999 116
AnnaBridge 187:0387e8f68319 117 Timer::operator float()
AnnaBridge 187:0387e8f68319 118 {
<> 149:156823d33999 119 return read();
<> 149:156823d33999 120 }
<> 149:156823d33999 121
<> 149:156823d33999 122 } // namespace mbed