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Proof of concept for distance and temperature monitoring
Dependencies: mbed mbedConnectorInterface mbedEndpointNetwork
hcsr04.h@10:338191178cbf, 2015-05-18 (annotated)
- Committer:
- coyotebush
- Date:
- Mon May 18 00:44:59 2015 +0000
- Revision:
- 10:338191178cbf
- Parent:
- 8:c69fe28366d8
max distance
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Luminoscity | 0:cb422b231ea5 | 1 | /* Copyright (c) 2013 Prabhu Desai |
Luminoscity | 0:cb422b231ea5 | 2 | * pdtechworld@gmail.com |
Luminoscity | 0:cb422b231ea5 | 3 | * |
Luminoscity | 0:cb422b231ea5 | 4 | * |
Luminoscity | 0:cb422b231ea5 | 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
Luminoscity | 0:cb422b231ea5 | 6 | * and associated documentation files (the "Software"), to deal in the Software without restriction, |
Luminoscity | 0:cb422b231ea5 | 7 | * including without limitation the rights to use, copy, modify, merge, publish, distribute, |
Luminoscity | 0:cb422b231ea5 | 8 | * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is |
Luminoscity | 0:cb422b231ea5 | 9 | * furnished to do so, subject to the following conditions: |
Luminoscity | 0:cb422b231ea5 | 10 | * |
Luminoscity | 0:cb422b231ea5 | 11 | * The above copyright notice and this permission notice shall be included in all copies or |
Luminoscity | 0:cb422b231ea5 | 12 | * substantial portions of the Software. |
Luminoscity | 0:cb422b231ea5 | 13 | * |
Luminoscity | 0:cb422b231ea5 | 14 | * For more details on the sensor : |
Luminoscity | 0:cb422b231ea5 | 15 | * http://www.elecfreaks.com/store/hcsr04-ultrasonic-sensor-distance-measuring-module-p-91.html?zenid=pgm8pgnvaodbe36dibq5s1soi3 |
Luminoscity | 0:cb422b231ea5 | 16 | * |
Luminoscity | 0:cb422b231ea5 | 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
Luminoscity | 0:cb422b231ea5 | 18 | * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
Luminoscity | 0:cb422b231ea5 | 19 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
Luminoscity | 0:cb422b231ea5 | 20 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
Luminoscity | 0:cb422b231ea5 | 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
Luminoscity | 0:cb422b231ea5 | 22 | */ |
Luminoscity | 0:cb422b231ea5 | 23 | |
Luminoscity | 0:cb422b231ea5 | 24 | #ifndef MBED_HCSR04_H |
Luminoscity | 0:cb422b231ea5 | 25 | #define MBED_HCSR04_H |
Luminoscity | 0:cb422b231ea5 | 26 | |
Luminoscity | 0:cb422b231ea5 | 27 | #include "mbed.h" |
Luminoscity | 0:cb422b231ea5 | 28 | |
Luminoscity | 0:cb422b231ea5 | 29 | /** HCSR04 Class(es) |
Luminoscity | 0:cb422b231ea5 | 30 | */ |
Luminoscity | 0:cb422b231ea5 | 31 | |
coyotebush | 8:c69fe28366d8 | 32 | // TODO(CJF): steal clever logic from https://code.google.com/p/arduino-new-ping/ ? |
coyotebush | 8:c69fe28366d8 | 33 | |
Luminoscity | 0:cb422b231ea5 | 34 | class HCSR04 |
Luminoscity | 0:cb422b231ea5 | 35 | { |
Luminoscity | 0:cb422b231ea5 | 36 | public: |
coyotebush | 8:c69fe28366d8 | 37 | static const double kMicrosecondsToCentimeters = 343.0 / 20000; |
coyotebush | 10:338191178cbf | 38 | static const double kBogusPulse = 500 / kMicrosecondsToCentimeters; |
coyotebush | 8:c69fe28366d8 | 39 | |
Luminoscity | 0:cb422b231ea5 | 40 | /** Create a HCSR04 object connected to the specified pin |
Luminoscity | 0:cb422b231ea5 | 41 | * @param pin i/o pin to connect to |
Luminoscity | 0:cb422b231ea5 | 42 | */ |
Luminoscity | 0:cb422b231ea5 | 43 | HCSR04(PinName TrigPin,PinName EchoPin); |
Luminoscity | 0:cb422b231ea5 | 44 | ~HCSR04(); |
Luminoscity | 0:cb422b231ea5 | 45 | |
Luminoscity | 0:cb422b231ea5 | 46 | /** Return the distance from obstacle in cm |
Luminoscity | 0:cb422b231ea5 | 47 | * @param distance in cms and returns -1, in case of failure |
Luminoscity | 0:cb422b231ea5 | 48 | */ |
coyotebush | 8:c69fe28366d8 | 49 | double get_dist_cm(void); |
coyotebush | 10:338191178cbf | 50 | double get_max_dist_cm(void); |
Luminoscity | 0:cb422b231ea5 | 51 | /** Return the pulse duration equal to sonic waves travelling to obstacle and back to receiver. |
Luminoscity | 0:cb422b231ea5 | 52 | * @param pulse duration in microseconds. |
Luminoscity | 0:cb422b231ea5 | 53 | */ |
coyotebush | 10:338191178cbf | 54 | int get_pulse_us(void); |
Luminoscity | 0:cb422b231ea5 | 55 | /** Generates the trigger pulse of 10us on the trigger PIN. |
Luminoscity | 0:cb422b231ea5 | 56 | */ |
Luminoscity | 0:cb422b231ea5 | 57 | void start(void ); |
Luminoscity | 0:cb422b231ea5 | 58 | void isr_rise(void); |
Luminoscity | 0:cb422b231ea5 | 59 | void isr_fall(void); |
Luminoscity | 0:cb422b231ea5 | 60 | void fall (void (*fptr)(void)); |
Luminoscity | 0:cb422b231ea5 | 61 | void rise (void (*fptr)(void)); |
Luminoscity | 0:cb422b231ea5 | 62 | |
Luminoscity | 0:cb422b231ea5 | 63 | |
Luminoscity | 0:cb422b231ea5 | 64 | |
Luminoscity | 0:cb422b231ea5 | 65 | private: |
Luminoscity | 0:cb422b231ea5 | 66 | |
Luminoscity | 0:cb422b231ea5 | 67 | Timer pulsetime; |
Luminoscity | 0:cb422b231ea5 | 68 | DigitalOut trigger; |
Luminoscity | 0:cb422b231ea5 | 69 | InterruptIn echo; |
coyotebush | 10:338191178cbf | 70 | int pulsedur; |
coyotebush | 10:338191178cbf | 71 | int maxpulse; |
Luminoscity | 0:cb422b231ea5 | 72 | }; |
Luminoscity | 0:cb422b231ea5 | 73 | |
Luminoscity | 0:cb422b231ea5 | 74 | #endif |