song zhao / smartball_project_test_board

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Dependencies:   BLE_API nRF51822

Fork of BLE_NODE_TEST by Yihui Xiong

mbed-src/common/Timer.cpp@9:05f0b5a3a70a, 2014-10-29 (annotated)

Committer:
yihui
Date:
Wed Oct 29 06:23:47 2014 +0000
Revision:
9:05f0b5a3a70a
initial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 9:05f0b5a3a70a 1 /* mbed Microcontroller Library
yihui 9:05f0b5a3a70a 2 * Copyright (c) 2006-2013 ARM Limited
yihui 9:05f0b5a3a70a 3 *
yihui 9:05f0b5a3a70a 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 9:05f0b5a3a70a 5 * you may not use this file except in compliance with the License.
yihui 9:05f0b5a3a70a 6 * You may obtain a copy of the License at
yihui 9:05f0b5a3a70a 7 *
yihui 9:05f0b5a3a70a 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 9:05f0b5a3a70a 9 *
yihui 9:05f0b5a3a70a 10 * Unless required by applicable law or agreed to in writing, software
yihui 9:05f0b5a3a70a 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 9:05f0b5a3a70a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 9:05f0b5a3a70a 13 * See the License for the specific language governing permissions and
yihui 9:05f0b5a3a70a 14 * limitations under the License.
yihui 9:05f0b5a3a70a 15 */
yihui 9:05f0b5a3a70a 16 #include "Timer.h"
yihui 9:05f0b5a3a70a 17 #include "us_ticker_api.h"
yihui 9:05f0b5a3a70a 18
yihui 9:05f0b5a3a70a 19 namespace mbed {
yihui 9:05f0b5a3a70a 20
yihui 9:05f0b5a3a70a 21 Timer::Timer() : _running(), _start(), _time() {
yihui 9:05f0b5a3a70a 22 reset();
yihui 9:05f0b5a3a70a 23 }
yihui 9:05f0b5a3a70a 24
yihui 9:05f0b5a3a70a 25 void Timer::start() {
yihui 9:05f0b5a3a70a 26 if (!_running) {
yihui 9:05f0b5a3a70a 27 _start = us_ticker_read();
yihui 9:05f0b5a3a70a 28 _running = 1;
yihui 9:05f0b5a3a70a 29 }
yihui 9:05f0b5a3a70a 30 }
yihui 9:05f0b5a3a70a 31
yihui 9:05f0b5a3a70a 32 void Timer::stop() {
yihui 9:05f0b5a3a70a 33 _time += slicetime();
yihui 9:05f0b5a3a70a 34 _running = 0;
yihui 9:05f0b5a3a70a 35 }
yihui 9:05f0b5a3a70a 36
yihui 9:05f0b5a3a70a 37 int Timer::read_us() {
yihui 9:05f0b5a3a70a 38 return _time + slicetime();
yihui 9:05f0b5a3a70a 39 }
yihui 9:05f0b5a3a70a 40
yihui 9:05f0b5a3a70a 41 float Timer::read() {
yihui 9:05f0b5a3a70a 42 return (float)read_us() / 1000000.0f;
yihui 9:05f0b5a3a70a 43 }
yihui 9:05f0b5a3a70a 44
yihui 9:05f0b5a3a70a 45 int Timer::read_ms() {
yihui 9:05f0b5a3a70a 46 return read_us() / 1000;
yihui 9:05f0b5a3a70a 47 }
yihui 9:05f0b5a3a70a 48
yihui 9:05f0b5a3a70a 49 int Timer::slicetime() {
yihui 9:05f0b5a3a70a 50 if (_running) {
yihui 9:05f0b5a3a70a 51 return us_ticker_read() - _start;
yihui 9:05f0b5a3a70a 52 } else {
yihui 9:05f0b5a3a70a 53 return 0;
yihui 9:05f0b5a3a70a 54 }
yihui 9:05f0b5a3a70a 55 }
yihui 9:05f0b5a3a70a 56
yihui 9:05f0b5a3a70a 57 void Timer::reset() {
yihui 9:05f0b5a3a70a 58 _start = us_ticker_read();
yihui 9:05f0b5a3a70a 59 _time = 0;
yihui 9:05f0b5a3a70a 60 }
yihui 9:05f0b5a3a70a 61
yihui 9:05f0b5a3a70a 62 #ifdef MBED_OPERATORS
yihui 9:05f0b5a3a70a 63 Timer::operator float() {
yihui 9:05f0b5a3a70a 64 return read();
yihui 9:05f0b5a3a70a 65 }
yihui 9:05f0b5a3a70a 66 #endif
yihui 9:05f0b5a3a70a 67
yihui 9:05f0b5a3a70a 68 } // namespace mbed