Bob Seque / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

common/Timer.cpp@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "Timer.h"
bogdanm 0:9b334a45a8ff 17 #include "ticker_api.h"
bogdanm 0:9b334a45a8ff 18 #include "us_ticker_api.h"
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 namespace mbed {
bogdanm 0:9b334a45a8ff 21
bogdanm 0:9b334a45a8ff 22 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()) {
bogdanm 0:9b334a45a8ff 23 reset();
bogdanm 0:9b334a45a8ff 24 }
bogdanm 0:9b334a45a8ff 25
bogdanm 0:9b334a45a8ff 26 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data) {
bogdanm 0:9b334a45a8ff 27 reset();
bogdanm 0:9b334a45a8ff 28 }
bogdanm 0:9b334a45a8ff 29
bogdanm 0:9b334a45a8ff 30 void Timer::start() {
bogdanm 0:9b334a45a8ff 31 if (!_running) {
bogdanm 0:9b334a45a8ff 32 _start = ticker_read(_ticker_data);
bogdanm 0:9b334a45a8ff 33 _running = 1;
bogdanm 0:9b334a45a8ff 34 }
bogdanm 0:9b334a45a8ff 35 }
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 void Timer::stop() {
bogdanm 0:9b334a45a8ff 38 _time += slicetime();
bogdanm 0:9b334a45a8ff 39 _running = 0;
bogdanm 0:9b334a45a8ff 40 }
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 int Timer::read_us() {
bogdanm 0:9b334a45a8ff 43 return _time + slicetime();
bogdanm 0:9b334a45a8ff 44 }
bogdanm 0:9b334a45a8ff 45
bogdanm 0:9b334a45a8ff 46 float Timer::read() {
bogdanm 0:9b334a45a8ff 47 return (float)read_us() / 1000000.0f;
bogdanm 0:9b334a45a8ff 48 }
bogdanm 0:9b334a45a8ff 49
bogdanm 0:9b334a45a8ff 50 int Timer::read_ms() {
bogdanm 0:9b334a45a8ff 51 return read_us() / 1000;
bogdanm 0:9b334a45a8ff 52 }
bogdanm 0:9b334a45a8ff 53
bogdanm 0:9b334a45a8ff 54 int Timer::slicetime() {
bogdanm 0:9b334a45a8ff 55 if (_running) {
bogdanm 0:9b334a45a8ff 56 return ticker_read(_ticker_data) - _start;
bogdanm 0:9b334a45a8ff 57 } else {
bogdanm 0:9b334a45a8ff 58 return 0;
bogdanm 0:9b334a45a8ff 59 }
bogdanm 0:9b334a45a8ff 60 }
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 void Timer::reset() {
bogdanm 0:9b334a45a8ff 63 _start = ticker_read(_ticker_data);
bogdanm 0:9b334a45a8ff 64 _time = 0;
bogdanm 0:9b334a45a8ff 65 }
bogdanm 0:9b334a45a8ff 66
bogdanm 0:9b334a45a8ff 67 #ifdef MBED_OPERATORS
bogdanm 0:9b334a45a8ff 68 Timer::operator float() {
bogdanm 0:9b334a45a8ff 69 return read();
bogdanm 0:9b334a45a8ff 70 }
bogdanm 0:9b334a45a8ff 71 #endif
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73 } // namespace mbed