Steve Kim / mbed-src

mbed library sources(for async_print)

Dependents:   AsyncPrint

Fork of mbed-src by mbed official

api/Timer.h@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Parent:
10:3bc89ef62ce7
Child:
525:c320967f86b9
Update mbed sources to revision 64

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 #ifndef MBED_TIMER_H
bogdanm 13:0645d8841f51 17 #define MBED_TIMER_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include "platform.h"
bogdanm 13:0645d8841f51 20
bogdanm 13:0645d8841f51 21 namespace mbed {
bogdanm 13:0645d8841f51 22
bogdanm 13:0645d8841f51 23 /** A general purpose timer
bogdanm 13:0645d8841f51 24 *
bogdanm 13:0645d8841f51 25 * Example:
bogdanm 13:0645d8841f51 26 * @code
bogdanm 13:0645d8841f51 27 * // Count the time to toggle a LED
bogdanm 13:0645d8841f51 28 *
bogdanm 13:0645d8841f51 29 * #include "mbed.h"
bogdanm 13:0645d8841f51 30 *
bogdanm 13:0645d8841f51 31 * Timer timer;
bogdanm 13:0645d8841f51 32 * DigitalOut led(LED1);
bogdanm 13:0645d8841f51 33 * int begin, end;
bogdanm 13:0645d8841f51 34 *
bogdanm 13:0645d8841f51 35 * int main() {
bogdanm 13:0645d8841f51 36 * timer.start();
bogdanm 13:0645d8841f51 37 * begin = timer.read_us();
bogdanm 13:0645d8841f51 38 * led = !led;
bogdanm 13:0645d8841f51 39 * end = timer.read_us();
bogdanm 13:0645d8841f51 40 * printf("Toggle the led takes %d us", end - begin);
bogdanm 13:0645d8841f51 41 * }
bogdanm 13:0645d8841f51 42 * @endcode
bogdanm 13:0645d8841f51 43 */
bogdanm 13:0645d8841f51 44 class Timer {
bogdanm 13:0645d8841f51 45
bogdanm 13:0645d8841f51 46 public:
bogdanm 13:0645d8841f51 47 Timer();
bogdanm 13:0645d8841f51 48
bogdanm 13:0645d8841f51 49 /** Start the timer
bogdanm 13:0645d8841f51 50 */
bogdanm 13:0645d8841f51 51 void start();
bogdanm 13:0645d8841f51 52
bogdanm 13:0645d8841f51 53 /** Stop the timer
bogdanm 13:0645d8841f51 54 */
bogdanm 13:0645d8841f51 55 void stop();
bogdanm 13:0645d8841f51 56
bogdanm 13:0645d8841f51 57 /** Reset the timer to 0.
bogdanm 13:0645d8841f51 58 *
bogdanm 13:0645d8841f51 59 * If it was already counting, it will continue
bogdanm 13:0645d8841f51 60 */
bogdanm 13:0645d8841f51 61 void reset();
bogdanm 13:0645d8841f51 62
bogdanm 13:0645d8841f51 63 /** Get the time passed in seconds
bogdanm 13:0645d8841f51 64 */
bogdanm 13:0645d8841f51 65 float read();
bogdanm 13:0645d8841f51 66
bogdanm 13:0645d8841f51 67 /** Get the time passed in mili-seconds
bogdanm 13:0645d8841f51 68 */
bogdanm 13:0645d8841f51 69 int read_ms();
bogdanm 13:0645d8841f51 70
bogdanm 13:0645d8841f51 71 /** Get the time passed in micro-seconds
bogdanm 13:0645d8841f51 72 */
bogdanm 13:0645d8841f51 73 int read_us();
bogdanm 13:0645d8841f51 74
bogdanm 13:0645d8841f51 75 #ifdef MBED_OPERATORS
bogdanm 13:0645d8841f51 76 operator float();
bogdanm 13:0645d8841f51 77 #endif
bogdanm 13:0645d8841f51 78
bogdanm 13:0645d8841f51 79 protected:
bogdanm 13:0645d8841f51 80 int slicetime();
bogdanm 13:0645d8841f51 81 int _running; // whether the timer is running
bogdanm 13:0645d8841f51 82 unsigned int _start; // the start time of the latest slice
bogdanm 13:0645d8841f51 83 int _time; // any accumulated time from previous slices
bogdanm 13:0645d8841f51 84 };
bogdanm 13:0645d8841f51 85
bogdanm 13:0645d8841f51 86 } // namespace mbed
bogdanm 13:0645d8841f51 87
bogdanm 13:0645d8841f51 88 #endif