Cooper Liu
/
Eurobot2013_IR
Eurobot 2013 IR testbench
PwmIn/PwmIn.h
- Committer:
- xiaxia686
- Date:
- 2012-11-14
- Revision:
- 1:818904abef3d
- Parent:
- 0:5ebe36076172
File content as of revision 1:818904abef3d:
/* mbed PwmIn Library * Copyright (c) 2008-2010, sford * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #ifndef MBED_PWMIN_H #define MBED_PWMIN_H #include "mbed.h" /** PwmIn class to read PWM inputs * * Uses InterruptIn to measure the changes on the input * and record the time they occur * * @note uses InterruptIn, so not available on p19/p20 */ class DummyCT; class PwmIn { public: /** Create a PwmIn * * @param p The pwm input pin (must support InterruptIn) */ PwmIn(PinName p); /** Read the current period * * @returns the period in seconds */ float period(); /** Read the current pulsewidth * * @returns the pulsewidth in seconds */ float pulsewidth(); /** Read the current dutycycle * * @returns the dutycycle as a percentage, represented between 0.0-1.0 */ float dutycycle(); /** A assigns a callback function when a new reading is available **/ void (*callbackfunc)(float dutycycle); DummyCT* callbackobj; void (DummyCT::*mcallbackfunc)(float dutycycle); protected: void rise(); void fall(); InterruptIn _p; Timer _t; float _pulsewidth, _period; }; #endif