1 | /*
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2 | * Ultrasonic.cpp
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3 | * A library for ultrasonic ranger
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4 | *
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5 | * Copyright (c) 2012 seeed technology inc.
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6 | * Website : www.seeed.cc
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7 | * Author : LG, FrankieChu
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8 | * Create Time: Jan 17,2013
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9 | * Change Log :
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10 | *
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11 | * The MIT License (MIT)
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12 | *
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13 | * Permission is hereby granted, free of charge, to any person obtaining a copy
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14 | * of this software and associated documentation files (the "Software"), to deal
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15 | * in the Software without restriction, including without limitation the rights
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16 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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17 | * copies of the Software, and to permit persons to whom the Software is
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18 | * furnished to do so, subject to the following conditions:
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19 | *
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20 | * The above copyright notice and this permission notice shall be included in
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21 | * all copies or substantial portions of the Software.
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22 | *
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23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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24 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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25 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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26 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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27 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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28 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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29 | * THE SOFTWARE.
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30 | */
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31 | #include <stdio.h>
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32 | #include <string.h>
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33 | #include <inttypes.h>
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34 | #include "Arduino.h"
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35 | #include "Ultrasonic.h"
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36 |
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37 | Ultrasonic::Ultrasonic(int pin)
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38 | {
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39 | _pin = pin;
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40 | }
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41 | /*The measured distance from the range 0 to 400 Centimeters*/
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42 | long Ultrasonic::MeasureInCentimeters(void)
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43 | {
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44 | pinMode(_pin, OUTPUT);
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45 | digitalWrite(_pin, LOW);
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46 | delayMicroseconds(2);
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47 | digitalWrite(_pin, HIGH);
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48 | delayMicroseconds(5);
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49 | digitalWrite(_pin,LOW);
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50 | pinMode(_pin,INPUT);
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51 | long duration;
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52 | duration = pulseIn(_pin,HIGH);
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53 | long RangeInCentimeters;
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54 | RangeInCentimeters = duration/29/2;
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55 | return RangeInCentimeters;
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56 | }
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57 | /*The measured distance from the range 0 to 157 Inches*/
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58 | long Ultrasonic::MeasureInInches(void)
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59 | {
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60 | pinMode(_pin, OUTPUT);
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61 | digitalWrite(_pin, LOW);
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62 | delayMicroseconds(2);
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63 | digitalWrite(_pin, HIGH);
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64 | delayMicroseconds(5);
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65 | digitalWrite(_pin,LOW);
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66 | pinMode(_pin,INPUT);
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67 | long duration;
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68 | duration = pulseIn(_pin,HIGH);
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69 | long RangeInInches;
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70 | RangeInInches = duration/74/2;
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71 | return RangeInInches;
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72 | }
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