mbed library sources(for async_print)
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Diff: api/Timer.h
- Revision:
- 10:3bc89ef62ce7
- Parent:
- 9:0ce32e54c9a7
- Child:
- 13:0645d8841f51
--- a/api/Timer.h Mon Jun 10 16:03:00 2013 +0100 +++ b/api/Timer.h Fri Jun 14 17:49:17 2013 +0100 @@ -1,88 +1,88 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2013 ARM Limited - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef MBED_TIMER_H -#define MBED_TIMER_H - -#include "platform.h" - -namespace mbed { - -/** A general purpose timer - * - * Example: - * @code - * // Count the time to toggle a LED - * - * #include "mbed.h" - * - * Timer timer; - * DigitalOut led(LED1); - * int begin, end; - * - * int main() { - * timer.start(); - * begin = timer.read_us(); - * led = !led; - * end = timer.read_us(); - * printf("Toggle the led takes %d us", end - begin); - * } - * @endcode - */ -class Timer { - -public: - Timer(); - - /** Start the timer - */ - void start(); - - /** Stop the timer - */ - void stop(); - - /** Reset the timer to 0. - * - * If it was already counting, it will continue - */ - void reset(); - - /** Get the time passed in seconds - */ - float read(); - - /** Get the time passed in mili-seconds - */ - int read_ms(); - - /** Get the time passed in micro-seconds - */ - int read_us(); - -#ifdef MBED_OPERATORS - operator float(); -#endif - -protected: - int slicetime(); - int _running; // whether the timer is running - unsigned int _start; // the start time of the latest slice - int _time; // any accumulated time from previous slices -}; - -} // namespace mbed - -#endif +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef MBED_TIMER_H +#define MBED_TIMER_H + +#include "platform.h" + +namespace mbed { + +/** A general purpose timer + * + * Example: + * @code + * // Count the time to toggle a LED + * + * #include "mbed.h" + * + * Timer timer; + * DigitalOut led(LED1); + * int begin, end; + * + * int main() { + * timer.start(); + * begin = timer.read_us(); + * led = !led; + * end = timer.read_us(); + * printf("Toggle the led takes %d us", end - begin); + * } + * @endcode + */ +class Timer { + +public: + Timer(); + + /** Start the timer + */ + void start(); + + /** Stop the timer + */ + void stop(); + + /** Reset the timer to 0. + * + * If it was already counting, it will continue + */ + void reset(); + + /** Get the time passed in seconds + */ + float read(); + + /** Get the time passed in mili-seconds + */ + int read_ms(); + + /** Get the time passed in micro-seconds + */ + int read_us(); + +#ifdef MBED_OPERATORS + operator float(); +#endif + +protected: + int slicetime(); + int _running; // whether the timer is running + unsigned int _start; // the start time of the latest slice + int _time; // any accumulated time from previous slices +}; + +} // namespace mbed + +#endif