Ermanno Brusadin / mbed-src

mbed library sources

common/Timer.cpp@0:0a673c671a56, 2016-07-27 (annotated)

Committer:
ebrus
Date:
Wed Jul 27 18:35:32 2016 +0000
Revision:
0:0a673c671a56
4

Who changed what in which revision?

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ebrus 0:0a673c671a56 1 /* mbed Microcontroller Library
ebrus 0:0a673c671a56 2 * Copyright (c) 2006-2013 ARM Limited
ebrus 0:0a673c671a56 3 *
ebrus 0:0a673c671a56 4 * Licensed under the Apache License, Version 2.0 (the "License");
ebrus 0:0a673c671a56 5 * you may not use this file except in compliance with the License.
ebrus 0:0a673c671a56 6 * You may obtain a copy of the License at
ebrus 0:0a673c671a56 7 *
ebrus 0:0a673c671a56 8 * http://www.apache.org/licenses/LICENSE-2.0
ebrus 0:0a673c671a56 9 *
ebrus 0:0a673c671a56 10 * Unless required by applicable law or agreed to in writing, software
ebrus 0:0a673c671a56 11 * distributed under the License is distributed on an "AS IS" BASIS,
ebrus 0:0a673c671a56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ebrus 0:0a673c671a56 13 * See the License for the specific language governing permissions and
ebrus 0:0a673c671a56 14 * limitations under the License.
ebrus 0:0a673c671a56 15 */
ebrus 0:0a673c671a56 16 #include "Timer.h"
ebrus 0:0a673c671a56 17 #include "us_ticker_api.h"
ebrus 0:0a673c671a56 18
ebrus 0:0a673c671a56 19 namespace mbed {
ebrus 0:0a673c671a56 20
ebrus 0:0a673c671a56 21 Timer::Timer() : _running(), _start(), _time() {
ebrus 0:0a673c671a56 22 reset();
ebrus 0:0a673c671a56 23 }
ebrus 0:0a673c671a56 24
ebrus 0:0a673c671a56 25 void Timer::start() {
ebrus 0:0a673c671a56 26 _start = us_ticker_read();
ebrus 0:0a673c671a56 27 _running = 1;
ebrus 0:0a673c671a56 28 }
ebrus 0:0a673c671a56 29
ebrus 0:0a673c671a56 30 void Timer::stop() {
ebrus 0:0a673c671a56 31 _time += slicetime();
ebrus 0:0a673c671a56 32 _running = 0;
ebrus 0:0a673c671a56 33 }
ebrus 0:0a673c671a56 34
ebrus 0:0a673c671a56 35 int Timer::read_us() {
ebrus 0:0a673c671a56 36 return _time + slicetime();
ebrus 0:0a673c671a56 37 }
ebrus 0:0a673c671a56 38
ebrus 0:0a673c671a56 39 float Timer::read() {
ebrus 0:0a673c671a56 40 return (float)read_us() / 1000000.0f;
ebrus 0:0a673c671a56 41 }
ebrus 0:0a673c671a56 42
ebrus 0:0a673c671a56 43 int Timer::read_ms() {
ebrus 0:0a673c671a56 44 return read_us() / 1000;
ebrus 0:0a673c671a56 45 }
ebrus 0:0a673c671a56 46
ebrus 0:0a673c671a56 47 int Timer::slicetime() {
ebrus 0:0a673c671a56 48 if (_running) {
ebrus 0:0a673c671a56 49 return us_ticker_read() - _start;
ebrus 0:0a673c671a56 50 } else {
ebrus 0:0a673c671a56 51 return 0;
ebrus 0:0a673c671a56 52 }
ebrus 0:0a673c671a56 53 }
ebrus 0:0a673c671a56 54
ebrus 0:0a673c671a56 55 void Timer::reset() {
ebrus 0:0a673c671a56 56 _start = us_ticker_read();
ebrus 0:0a673c671a56 57 _time = 0;
ebrus 0:0a673c671a56 58 }
ebrus 0:0a673c671a56 59
ebrus 0:0a673c671a56 60 #ifdef MBED_OPERATORS
ebrus 0:0a673c671a56 61 Timer::operator float() {
ebrus 0:0a673c671a56 62 return read();
ebrus 0:0a673c671a56 63 }
ebrus 0:0a673c671a56 64 #endif
ebrus 0:0a673c671a56 65
ebrus 0:0a673c671a56 66 } // namespace mbed