text: /* 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.
   */
  #include "Timer.h"
  #include "us_ticker_api.h"
  
  namespace mbed {
  
  Timer::Timer() : _running(), _start(), _time() {
      reset();
  }
  
  void Timer::start() {
      _start = us_ticker_read();
      _running = 1;
  }
  
  void Timer::stop() {
      _time += slicetime();
      _running = 0;
  }
  
  int Timer::read_us() {
      return _time + slicetime();
  }
  
  float Timer::read() {
      return (float)read_us() / 1000000.0f;
  }
  
  int Timer::read_ms() {
      return read_us() / 1000;
  }
  
  int Timer::slicetime() {
      if (_running) {
          return us_ticker_read() - _start;
      } else {
          return 0;
      }
  }
  
  void Timer::reset() {
      _start = us_ticker_read();
      _time = 0;
  }
  
  #ifdef MBED_OPERATORS
  Timer::operator float() {
      return read();
  }
  #endif
  
  } // namespace mbed
  