lzbp li / mbed-stm32l0l1-src-1

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Fork of mbed-stm32l0/l1-src by lzbp li

common/Timer.cpp@212:34d62c0b2af6, 2014-05-26 (annotated)

Committer:
mbed_official
Date:
Mon May 26 18:15:07 2014 +0100
Revision:
212:34d62c0b2af6
Parent:
13:0645d8841f51
Child:
358:9d7ef901f004
Synchronized with git revision f65b7d907785089e8dd942446f1c974b3a213a39



Full URL: https://github.com/mbedmicro/mbed/commit/f65b7d907785089e8dd942446f1c974b3a213a39/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #include "Timer.h"
bogdanm 13:0645d8841f51 17 #include "us_ticker_api.h"
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 namespace mbed {
bogdanm 13:0645d8841f51 20
mbed_official 212:34d62c0b2af6 21 Timer::Timer() : _running(), _start(), _time() {
bogdanm 13:0645d8841f51 22 reset();
bogdanm 13:0645d8841f51 23 }
bogdanm 13:0645d8841f51 24
bogdanm 13:0645d8841f51 25 void Timer::start() {
bogdanm 13:0645d8841f51 26 _start = us_ticker_read();
bogdanm 13:0645d8841f51 27 _running = 1;
bogdanm 13:0645d8841f51 28 }
bogdanm 13:0645d8841f51 29
bogdanm 13:0645d8841f51 30 void Timer::stop() {
bogdanm 13:0645d8841f51 31 _time += slicetime();
bogdanm 13:0645d8841f51 32 _running = 0;
bogdanm 13:0645d8841f51 33 }
bogdanm 13:0645d8841f51 34
bogdanm 13:0645d8841f51 35 int Timer::read_us() {
bogdanm 13:0645d8841f51 36 return _time + slicetime();
bogdanm 13:0645d8841f51 37 }
bogdanm 13:0645d8841f51 38
bogdanm 13:0645d8841f51 39 float Timer::read() {
bogdanm 13:0645d8841f51 40 return (float)read_us() / 1000000.0f;
bogdanm 13:0645d8841f51 41 }
bogdanm 13:0645d8841f51 42
bogdanm 13:0645d8841f51 43 int Timer::read_ms() {
bogdanm 13:0645d8841f51 44 return read_us() / 1000;
bogdanm 13:0645d8841f51 45 }
bogdanm 13:0645d8841f51 46
bogdanm 13:0645d8841f51 47 int Timer::slicetime() {
bogdanm 13:0645d8841f51 48 if (_running) {
bogdanm 13:0645d8841f51 49 return us_ticker_read() - _start;
bogdanm 13:0645d8841f51 50 } else {
bogdanm 13:0645d8841f51 51 return 0;
bogdanm 13:0645d8841f51 52 }
bogdanm 13:0645d8841f51 53 }
bogdanm 13:0645d8841f51 54
bogdanm 13:0645d8841f51 55 void Timer::reset() {
bogdanm 13:0645d8841f51 56 _start = us_ticker_read();
bogdanm 13:0645d8841f51 57 _time = 0;
bogdanm 13:0645d8841f51 58 }
bogdanm 13:0645d8841f51 59
bogdanm 13:0645d8841f51 60 #ifdef MBED_OPERATORS
bogdanm 13:0645d8841f51 61 Timer::operator float() {
bogdanm 13:0645d8841f51 62 return read();
bogdanm 13:0645d8841f51 63 }
bogdanm 13:0645d8841f51 64 #endif
bogdanm 13:0645d8841f51 65
bogdanm 13:0645d8841f51 66 } // namespace mbed