mbed library sources. Supersedes mbed-src.
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drivers/Timer.h
- Committer:
- AnnaBridge
- Date:
- 2017-06-21
- Revision:
- 167:e84263d55307
- Parent:
- 149:156823d33999
- Child:
- 168:9672193075cf
File content as of revision 167:e84263d55307:
/* 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/platform.h" #include "hal/ticker_api.h" namespace mbed { /** \addtogroup drivers */ /** A general purpose timer * * @note Synchronization level: Interrupt safe * * 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 * @ingroup drivers */ class Timer { public: Timer(); Timer(const ticker_data_t *data); /** 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 * * @returns Time passed in seconds */ float read(); /** Get the time passed in milli-seconds * * @returns Time passed in milli seconds */ int read_ms(); /** Get the time passed in micro-seconds * * @returns Time passed in micro seconds */ int read_us(); /** An operator shorthand for read() */ operator float(); /** Get in a high resolution type the time passed in micro-seconds. */ us_timestamp_t read_high_resolution_us(); protected: us_timestamp_t slicetime(); int _running; // whether the timer is running us_timestamp_t _start; // the start time of the latest slice us_timestamp_t _time; // any accumulated time from previous slices const ticker_data_t *_ticker_data; }; } // namespace mbed #endif