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Proejct2
hcsr04.h
- Committer:
- prabhuvd
- Date:
- 2013-03-30
- Revision:
- 7:71da0dbf4400
- Parent:
- 6:4be4fcd0c171
File content as of revision 7:71da0dbf4400:
/* Copyright (c) 2013 Prabhu Desai * pdtechworld@gmail.com * * * 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. * * For more details on the sensor : * http://www.elecfreaks.com/store/hcsr04-ultrasonic-sensor-distance-measuring-module-p-91.html?zenid=pgm8pgnvaodbe36dibq5s1soi3 * * 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_HCSR04_H #define MBED_HCSR04_H #include "mbed.h" /** HCSR04 Class(es) */ class HCSR04 { public: /** Create a HCSR04 object connected to the specified pin * @param pin i/o pin to connect to */ HCSR04(PinName TrigPin,PinName EchoPin); ~HCSR04(); /** Return the distance from obstacle in cm * @param distance in cms and returns -1, in case of failure */ unsigned int get_dist_cm(void); /** Return the pulse duration equal to sonic waves travelling to obstacle and back to receiver. * @param pulse duration in microseconds. */ unsigned int get_pulse_us(void); /** Generates the trigger pulse of 10us on the trigger PIN. */ void start(void ); void isr_rise(void); void isr_fall(void); void fall (void (*fptr)(void)); void rise (void (*fptr)(void)); private: Timer pulsetime; DigitalOut trigger; InterruptIn echo; unsigned int pulsedur; unsigned int distance; }; #endif