Bei Chen Liu / mbed-src

mbed library sources

Fork of mbed-src by mbed official

cpp/Timer.cpp@0:fd0d7bdfcdc2, 2012-11-20 (annotated)

Committer:
mbed_official
Date:
Tue Nov 20 17:24:08 2012 +0000
Revision:
0:fd0d7bdfcdc2
Child:
2:143cac498751
mbed sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
mbed_official 0:fd0d7bdfcdc2 2 * Copyright (c) 2006-2012 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
mbed_official 0:fd0d7bdfcdc2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mbed_official 0:fd0d7bdfcdc2 5 * of this software and associated documentation files (the "Software"), to deal
mbed_official 0:fd0d7bdfcdc2 6 * in the Software without restriction, including without limitation the rights
mbed_official 0:fd0d7bdfcdc2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mbed_official 0:fd0d7bdfcdc2 8 * copies of the Software, and to permit persons to whom the Software is
mbed_official 0:fd0d7bdfcdc2 9 * furnished to do so, subject to the following conditions:
mbed_official 0:fd0d7bdfcdc2 10 *
mbed_official 0:fd0d7bdfcdc2 11 * The above copyright notice and this permission notice shall be included in
mbed_official 0:fd0d7bdfcdc2 12 * all copies or substantial portions of the Software.
mbed_official 0:fd0d7bdfcdc2 13 *
mbed_official 0:fd0d7bdfcdc2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mbed_official 0:fd0d7bdfcdc2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mbed_official 0:fd0d7bdfcdc2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mbed_official 0:fd0d7bdfcdc2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mbed_official 0:fd0d7bdfcdc2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:fd0d7bdfcdc2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mbed_official 0:fd0d7bdfcdc2 20 * SOFTWARE.
mbed_official 0:fd0d7bdfcdc2 21 */
mbed_official 0:fd0d7bdfcdc2 22 #include "Timer.h"
mbed_official 0:fd0d7bdfcdc2 23 #include "us_ticker_api.h"
mbed_official 0:fd0d7bdfcdc2 24
mbed_official 0:fd0d7bdfcdc2 25 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 26
mbed_official 0:fd0d7bdfcdc2 27 Timer::Timer() {
mbed_official 0:fd0d7bdfcdc2 28 reset();
mbed_official 0:fd0d7bdfcdc2 29 }
mbed_official 0:fd0d7bdfcdc2 30
mbed_official 0:fd0d7bdfcdc2 31 void Timer::start() {
mbed_official 0:fd0d7bdfcdc2 32 _start = us_ticker_read();
mbed_official 0:fd0d7bdfcdc2 33 _running = 1;
mbed_official 0:fd0d7bdfcdc2 34 }
mbed_official 0:fd0d7bdfcdc2 35
mbed_official 0:fd0d7bdfcdc2 36 void Timer::stop() {
mbed_official 0:fd0d7bdfcdc2 37 _time += slicetime();
mbed_official 0:fd0d7bdfcdc2 38 _running = 0;
mbed_official 0:fd0d7bdfcdc2 39 }
mbed_official 0:fd0d7bdfcdc2 40
mbed_official 0:fd0d7bdfcdc2 41 int Timer::read_us() {
mbed_official 0:fd0d7bdfcdc2 42 return _time + slicetime();
mbed_official 0:fd0d7bdfcdc2 43 }
mbed_official 0:fd0d7bdfcdc2 44
mbed_official 0:fd0d7bdfcdc2 45 float Timer::read() {
mbed_official 0:fd0d7bdfcdc2 46 return (float)read_us() / 1000000.0;
mbed_official 0:fd0d7bdfcdc2 47 }
mbed_official 0:fd0d7bdfcdc2 48
mbed_official 0:fd0d7bdfcdc2 49 int Timer::read_ms() {
mbed_official 0:fd0d7bdfcdc2 50 return read_us() / 1000;
mbed_official 0:fd0d7bdfcdc2 51 }
mbed_official 0:fd0d7bdfcdc2 52
mbed_official 0:fd0d7bdfcdc2 53 int Timer::slicetime() {
mbed_official 0:fd0d7bdfcdc2 54 if (_running) {
mbed_official 0:fd0d7bdfcdc2 55 return us_ticker_read() - _start;
mbed_official 0:fd0d7bdfcdc2 56 } else {
mbed_official 0:fd0d7bdfcdc2 57 return 0;
mbed_official 0:fd0d7bdfcdc2 58 }
mbed_official 0:fd0d7bdfcdc2 59 }
mbed_official 0:fd0d7bdfcdc2 60
mbed_official 0:fd0d7bdfcdc2 61 void Timer::reset() {
mbed_official 0:fd0d7bdfcdc2 62 _start = us_ticker_read();
mbed_official 0:fd0d7bdfcdc2 63 _time = 0;
mbed_official 0:fd0d7bdfcdc2 64 }
mbed_official 0:fd0d7bdfcdc2 65
mbed_official 0:fd0d7bdfcdc2 66 #ifdef MBED_OPERATORS
mbed_official 0:fd0d7bdfcdc2 67 Timer::operator float() {
mbed_official 0:fd0d7bdfcdc2 68 return read();
mbed_official 0:fd0d7bdfcdc2 69 }
mbed_official 0:fd0d7bdfcdc2 70 #endif
mbed_official 0:fd0d7bdfcdc2 71
mbed_official 0:fd0d7bdfcdc2 72 } // namespace mbed