DongEun Koak / mbed-src

mbed library sources

Dependents:   Freedman_v2 Nucleo_i2c_OLED_BME280_copy

Fork of mbed-src by mbed official

common/Timer.cpp@358:9d7ef901f004, 2014-10-20 (annotated)

Committer:
mbed_official
Date:
Mon Oct 20 08:45:07 2014 +0100
Revision:
358:9d7ef901f004
Parent:
212:34d62c0b2af6
Child:
525:c320967f86b9
Synchronized with git revision 996e49964cd2c762ffd47bdce32ff3211f997782



Full URL: https://github.com/mbedmicro/mbed/commit/996e49964cd2c762ffd47bdce32ff3211f997782/



API: Timer - start() behavior (bug)fix

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() {
mbed_official 358:9d7ef901f004 26 if (!_running) {
mbed_official 358:9d7ef901f004 27 _start = us_ticker_read();
mbed_official 358:9d7ef901f004 28 _running = 1;
mbed_official 358:9d7ef901f004 29 }
bogdanm 13:0645d8841f51 30 }
bogdanm 13:0645d8841f51 31
bogdanm 13:0645d8841f51 32 void Timer::stop() {
bogdanm 13:0645d8841f51 33 _time += slicetime();
bogdanm 13:0645d8841f51 34 _running = 0;
bogdanm 13:0645d8841f51 35 }
bogdanm 13:0645d8841f51 36
bogdanm 13:0645d8841f51 37 int Timer::read_us() {
bogdanm 13:0645d8841f51 38 return _time + slicetime();
bogdanm 13:0645d8841f51 39 }
bogdanm 13:0645d8841f51 40
bogdanm 13:0645d8841f51 41 float Timer::read() {
bogdanm 13:0645d8841f51 42 return (float)read_us() / 1000000.0f;
bogdanm 13:0645d8841f51 43 }
bogdanm 13:0645d8841f51 44
bogdanm 13:0645d8841f51 45 int Timer::read_ms() {
bogdanm 13:0645d8841f51 46 return read_us() / 1000;
bogdanm 13:0645d8841f51 47 }
bogdanm 13:0645d8841f51 48
bogdanm 13:0645d8841f51 49 int Timer::slicetime() {
bogdanm 13:0645d8841f51 50 if (_running) {
bogdanm 13:0645d8841f51 51 return us_ticker_read() - _start;
bogdanm 13:0645d8841f51 52 } else {
bogdanm 13:0645d8841f51 53 return 0;
bogdanm 13:0645d8841f51 54 }
bogdanm 13:0645d8841f51 55 }
bogdanm 13:0645d8841f51 56
bogdanm 13:0645d8841f51 57 void Timer::reset() {
bogdanm 13:0645d8841f51 58 _start = us_ticker_read();
bogdanm 13:0645d8841f51 59 _time = 0;
bogdanm 13:0645d8841f51 60 }
bogdanm 13:0645d8841f51 61
bogdanm 13:0645d8841f51 62 #ifdef MBED_OPERATORS
bogdanm 13:0645d8841f51 63 Timer::operator float() {
bogdanm 13:0645d8841f51 64 return read();
bogdanm 13:0645d8841f51 65 }
bogdanm 13:0645d8841f51 66 #endif
bogdanm 13:0645d8841f51 67
bogdanm 13:0645d8841f51 68 } // namespace mbed