Garbage Collectors / TrashSensors

temperature and distance

Fork of TrashSensors by Corey Ford

hcsr04.h@0:3f335fc50cef, 2015-05-24 (annotated)

Committer:
coyotebush
Date:
Sun May 24 20:45:32 2015 +0000
Revision:
0:3f335fc50cef
extract sensor code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
coyotebush 0:3f335fc50cef 1 /* Copyright (c) 2013 Prabhu Desai
coyotebush 0:3f335fc50cef 2 * pdtechworld@gmail.com
coyotebush 0:3f335fc50cef 3 *
coyotebush 0:3f335fc50cef 4 *
coyotebush 0:3f335fc50cef 5 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
coyotebush 0:3f335fc50cef 6 * and associated documentation files (the "Software"), to deal in the Software without restriction,
coyotebush 0:3f335fc50cef 7 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
coyotebush 0:3f335fc50cef 8 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
coyotebush 0:3f335fc50cef 9 * furnished to do so, subject to the following conditions:
coyotebush 0:3f335fc50cef 10 *
coyotebush 0:3f335fc50cef 11 * The above copyright notice and this permission notice shall be included in all copies or
coyotebush 0:3f335fc50cef 12 * substantial portions of the Software.
coyotebush 0:3f335fc50cef 13 *
coyotebush 0:3f335fc50cef 14 * For more details on the sensor :
coyotebush 0:3f335fc50cef 15 * http://www.elecfreaks.com/store/hcsr04-ultrasonic-sensor-distance-measuring-module-p-91.html?zenid=pgm8pgnvaodbe36dibq5s1soi3
coyotebush 0:3f335fc50cef 16 *
coyotebush 0:3f335fc50cef 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
coyotebush 0:3f335fc50cef 18 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
coyotebush 0:3f335fc50cef 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
coyotebush 0:3f335fc50cef 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
coyotebush 0:3f335fc50cef 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
coyotebush 0:3f335fc50cef 22 */
coyotebush 0:3f335fc50cef 23
coyotebush 0:3f335fc50cef 24 #ifndef MBED_HCSR04_H
coyotebush 0:3f335fc50cef 25 #define MBED_HCSR04_H
coyotebush 0:3f335fc50cef 26
coyotebush 0:3f335fc50cef 27 #include "mbed.h"
coyotebush 0:3f335fc50cef 28
coyotebush 0:3f335fc50cef 29 /** HCSR04 Class(es)
coyotebush 0:3f335fc50cef 30 */
coyotebush 0:3f335fc50cef 31
coyotebush 0:3f335fc50cef 32 // TODO(CJF): steal clever logic from https://code.google.com/p/arduino-new-ping/ ?
coyotebush 0:3f335fc50cef 33
coyotebush 0:3f335fc50cef 34 class HCSR04
coyotebush 0:3f335fc50cef 35 {
coyotebush 0:3f335fc50cef 36 public:
coyotebush 0:3f335fc50cef 37 static const double kMicrosecondsToCentimeters = 343.0 / 20000;
coyotebush 0:3f335fc50cef 38 static const double kBogusPulse = 500 / kMicrosecondsToCentimeters;
coyotebush 0:3f335fc50cef 39
coyotebush 0:3f335fc50cef 40 /** Create a HCSR04 object connected to the specified pin
coyotebush 0:3f335fc50cef 41 * @param pin i/o pin to connect to
coyotebush 0:3f335fc50cef 42 */
coyotebush 0:3f335fc50cef 43 HCSR04(PinName TrigPin,PinName EchoPin);
coyotebush 0:3f335fc50cef 44 ~HCSR04();
coyotebush 0:3f335fc50cef 45
coyotebush 0:3f335fc50cef 46 /** Return the distance from obstacle in cm
coyotebush 0:3f335fc50cef 47 * @param distance in cms and returns -1, in case of failure
coyotebush 0:3f335fc50cef 48 */
coyotebush 0:3f335fc50cef 49 double get_dist_cm(void);
coyotebush 0:3f335fc50cef 50 double get_max_dist_cm(void);
coyotebush 0:3f335fc50cef 51 /** Return the pulse duration equal to sonic waves travelling to obstacle and back to receiver.
coyotebush 0:3f335fc50cef 52 * @param pulse duration in microseconds.
coyotebush 0:3f335fc50cef 53 */
coyotebush 0:3f335fc50cef 54 int get_pulse_us(void);
coyotebush 0:3f335fc50cef 55 /** Generates the trigger pulse of 10us on the trigger PIN.
coyotebush 0:3f335fc50cef 56 */
coyotebush 0:3f335fc50cef 57 void start(void );
coyotebush 0:3f335fc50cef 58 void isr_rise(void);
coyotebush 0:3f335fc50cef 59 void isr_fall(void);
coyotebush 0:3f335fc50cef 60 void fall (void (*fptr)(void));
coyotebush 0:3f335fc50cef 61 void rise (void (*fptr)(void));
coyotebush 0:3f335fc50cef 62
coyotebush 0:3f335fc50cef 63
coyotebush 0:3f335fc50cef 64
coyotebush 0:3f335fc50cef 65 private:
coyotebush 0:3f335fc50cef 66
coyotebush 0:3f335fc50cef 67 Timer pulsetime;
coyotebush 0:3f335fc50cef 68 DigitalOut trigger;
coyotebush 0:3f335fc50cef 69 InterruptIn echo;
coyotebush 0:3f335fc50cef 70 int pulsedur;
coyotebush 0:3f335fc50cef 71 int maxpulse;
coyotebush 0:3f335fc50cef 72 };
coyotebush 0:3f335fc50cef 73
coyotebush 0:3f335fc50cef 74 #endif