DSP Book Yeditepe / mbed_f401re

mbed library sources with internal temperature sensor for nucleo f401

common/Timer.cpp@0:7e2bd16f80af, 2015-01-17 (annotated)

Committer:
elessair
Date:
Sat Jan 17 18:03:58 2015 +0000
Revision:
0:7e2bd16f80af
nucleo f401re internal temperature added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:7e2bd16f80af 1 /* mbed Microcontroller Library
elessair 0:7e2bd16f80af 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:7e2bd16f80af 3 *
elessair 0:7e2bd16f80af 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:7e2bd16f80af 5 * you may not use this file except in compliance with the License.
elessair 0:7e2bd16f80af 6 * You may obtain a copy of the License at
elessair 0:7e2bd16f80af 7 *
elessair 0:7e2bd16f80af 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:7e2bd16f80af 9 *
elessair 0:7e2bd16f80af 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:7e2bd16f80af 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:7e2bd16f80af 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:7e2bd16f80af 13 * See the License for the specific language governing permissions and
elessair 0:7e2bd16f80af 14 * limitations under the License.
elessair 0:7e2bd16f80af 15 */
elessair 0:7e2bd16f80af 16 #include "Timer.h"
elessair 0:7e2bd16f80af 17 #include "us_ticker_api.h"
elessair 0:7e2bd16f80af 18
elessair 0:7e2bd16f80af 19 namespace mbed {
elessair 0:7e2bd16f80af 20
elessair 0:7e2bd16f80af 21 Timer::Timer() : _running(), _start(), _time() {
elessair 0:7e2bd16f80af 22 reset();
elessair 0:7e2bd16f80af 23 }
elessair 0:7e2bd16f80af 24
elessair 0:7e2bd16f80af 25 void Timer::start() {
elessair 0:7e2bd16f80af 26 if (!_running) {
elessair 0:7e2bd16f80af 27 _start = us_ticker_read();
elessair 0:7e2bd16f80af 28 _running = 1;
elessair 0:7e2bd16f80af 29 }
elessair 0:7e2bd16f80af 30 }
elessair 0:7e2bd16f80af 31
elessair 0:7e2bd16f80af 32 void Timer::stop() {
elessair 0:7e2bd16f80af 33 _time += slicetime();
elessair 0:7e2bd16f80af 34 _running = 0;
elessair 0:7e2bd16f80af 35 }
elessair 0:7e2bd16f80af 36
elessair 0:7e2bd16f80af 37 int Timer::read_us() {
elessair 0:7e2bd16f80af 38 return _time + slicetime();
elessair 0:7e2bd16f80af 39 }
elessair 0:7e2bd16f80af 40
elessair 0:7e2bd16f80af 41 float Timer::read() {
elessair 0:7e2bd16f80af 42 return (float)read_us() / 1000000.0f;
elessair 0:7e2bd16f80af 43 }
elessair 0:7e2bd16f80af 44
elessair 0:7e2bd16f80af 45 int Timer::read_ms() {
elessair 0:7e2bd16f80af 46 return read_us() / 1000;
elessair 0:7e2bd16f80af 47 }
elessair 0:7e2bd16f80af 48
elessair 0:7e2bd16f80af 49 int Timer::slicetime() {
elessair 0:7e2bd16f80af 50 if (_running) {
elessair 0:7e2bd16f80af 51 return us_ticker_read() - _start;
elessair 0:7e2bd16f80af 52 } else {
elessair 0:7e2bd16f80af 53 return 0;
elessair 0:7e2bd16f80af 54 }
elessair 0:7e2bd16f80af 55 }
elessair 0:7e2bd16f80af 56
elessair 0:7e2bd16f80af 57 void Timer::reset() {
elessair 0:7e2bd16f80af 58 _start = us_ticker_read();
elessair 0:7e2bd16f80af 59 _time = 0;
elessair 0:7e2bd16f80af 60 }
elessair 0:7e2bd16f80af 61
elessair 0:7e2bd16f80af 62 #ifdef MBED_OPERATORS
elessair 0:7e2bd16f80af 63 Timer::operator float() {
elessair 0:7e2bd16f80af 64 return read();
elessair 0:7e2bd16f80af 65 }
elessair 0:7e2bd16f80af 66 #endif
elessair 0:7e2bd16f80af 67
elessair 0:7e2bd16f80af 68 } // namespace mbed