Tim Ambrose / Mbed 2 deprecated TempAndDistTest

Proof of concept for distance and temperature monitoring

Dependencies:   mbed mbedConnectorInterface mbedEndpointNetwork

hcsr04.cpp@8:c69fe28366d8, 2015-05-06 (annotated)

Committer:
coyotebush
Date:
Wed May 06 04:02:08 2015 +0000
Revision:
8:c69fe28366d8
Parent:
7:939fdc8df95b
Child:
10:338191178cbf
Distance sensing improvements

Who changed what in which revision?

UserRevisionLine numberNew 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 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
Luminoscity 0:cb422b231ea5 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
Luminoscity 0:cb422b231ea5 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
Luminoscity 0:cb422b231ea5 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
Luminoscity 0:cb422b231ea5 8 * furnished to do so, subject to the following conditions:
Luminoscity 0:cb422b231ea5 9 *
Luminoscity 0:cb422b231ea5 10 * The above copyright notice and this permission notice shall be included in all copies or
Luminoscity 0:cb422b231ea5 11 * substantial portions of the Software.
Luminoscity 0:cb422b231ea5 12 *
Luminoscity 0:cb422b231ea5 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
Luminoscity 0:cb422b231ea5 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Luminoscity 0:cb422b231ea5 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
Luminoscity 0:cb422b231ea5 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Luminoscity 0:cb422b231ea5 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Luminoscity 0:cb422b231ea5 18 */
Luminoscity 0:cb422b231ea5 19
Luminoscity 0:cb422b231ea5 20
Luminoscity 0:cb422b231ea5 21 #include "hcsr04.h"
Luminoscity 0:cb422b231ea5 22
Luminoscity 0:cb422b231ea5 23
Luminoscity 0:cb422b231ea5 24 HCSR04::HCSR04(PinName TrigPin,PinName EchoPin):
Luminoscity 0:cb422b231ea5 25 trigger(TrigPin), echo(EchoPin)
Luminoscity 0:cb422b231ea5 26 {
Luminoscity 0:cb422b231ea5 27 pulsetime.stop();
Luminoscity 0:cb422b231ea5 28 pulsetime.reset();
Luminoscity 0:cb422b231ea5 29 echo.rise(this,&HCSR04::isr_rise);
Luminoscity 0:cb422b231ea5 30 echo.fall(this,&HCSR04::isr_fall);
Luminoscity 0:cb422b231ea5 31 trigger=0;
Luminoscity 0:cb422b231ea5 32 }
Luminoscity 0:cb422b231ea5 33
Luminoscity 0:cb422b231ea5 34 HCSR04::~HCSR04()
Luminoscity 0:cb422b231ea5 35 {
Luminoscity 0:cb422b231ea5 36 }
Luminoscity 0:cb422b231ea5 37
Luminoscity 0:cb422b231ea5 38 void HCSR04::isr_rise(void)
Luminoscity 0:cb422b231ea5 39 {
Luminoscity 0:cb422b231ea5 40 pulsetime.start();
coyotebush 8:c69fe28366d8 41 pulsetime.reset();
Luminoscity 0:cb422b231ea5 42 }
Luminoscity 0:cb422b231ea5 43 void HCSR04::start(void)
Luminoscity 0:cb422b231ea5 44 {
coyotebush 7:939fdc8df95b 45 pulsedur = 0;
coyotebush 7:939fdc8df95b 46
Luminoscity 0:cb422b231ea5 47 trigger=1;
Luminoscity 0:cb422b231ea5 48 wait_us(10);
Luminoscity 0:cb422b231ea5 49 trigger=0;
Luminoscity 0:cb422b231ea5 50 }
Luminoscity 0:cb422b231ea5 51
Luminoscity 0:cb422b231ea5 52 void HCSR04::isr_fall(void)
Luminoscity 0:cb422b231ea5 53 {
Luminoscity 0:cb422b231ea5 54 pulsetime.stop();
Luminoscity 0:cb422b231ea5 55 pulsedur = pulsetime.read_us();
Luminoscity 0:cb422b231ea5 56 }
Luminoscity 0:cb422b231ea5 57
Luminoscity 0:cb422b231ea5 58 void HCSR04::rise (void (*fptr)(void))
Luminoscity 0:cb422b231ea5 59 {
Luminoscity 0:cb422b231ea5 60 echo.rise(fptr);
Luminoscity 0:cb422b231ea5 61 }
Luminoscity 0:cb422b231ea5 62 void HCSR04::fall (void (*fptr)(void))
Luminoscity 0:cb422b231ea5 63 {
Luminoscity 0:cb422b231ea5 64 echo.fall(fptr);
Luminoscity 0:cb422b231ea5 65 }
Luminoscity 0:cb422b231ea5 66
coyotebush 8:c69fe28366d8 67 double HCSR04::get_dist_cm()
Luminoscity 0:cb422b231ea5 68 {
coyotebush 8:c69fe28366d8 69 if (pulsedur == 0)
coyotebush 8:c69fe28366d8 70 return -1;
coyotebush 8:c69fe28366d8 71 return pulsedur * kMicrosecondsToCentimeters;
Luminoscity 0:cb422b231ea5 72 }
Luminoscity 0:cb422b231ea5 73 unsigned int HCSR04::get_pulse_us()
Luminoscity 0:cb422b231ea5 74 {
Luminoscity 0:cb422b231ea5 75 return pulsedur;
Luminoscity 0:cb422b231ea5 76 }
Luminoscity 0:cb422b231ea5 77
Luminoscity 0:cb422b231ea5 78
Luminoscity 0:cb422b231ea5 79
Luminoscity 0:cb422b231ea5 80 /*******************************************************
Luminoscity 0:cb422b231ea5 81 Here is a sample code usage
Luminoscity 0:cb422b231ea5 82 *********************************************************
Luminoscity 0:cb422b231ea5 83 #include "hcsr04.h"
Luminoscity 0:cb422b231ea5 84 HCSR04 usensor(p25,p6);
Luminoscity 0:cb422b231ea5 85 int main()
Luminoscity 0:cb422b231ea5 86 {
Luminoscity 0:cb422b231ea5 87 unsigned char count=0;
Luminoscity 0:cb422b231ea5 88 while(1) {
Luminoscity 0:cb422b231ea5 89 usensor.start();
Luminoscity 0:cb422b231ea5 90 wait_ms(500);
Luminoscity 0:cb422b231ea5 91 dist=usensor.get_dist_cm();
Luminoscity 0:cb422b231ea5 92 lcd.cls();
Luminoscity 0:cb422b231ea5 93 lcd.locate(0,0);
Luminoscity 0:cb422b231ea5 94 lcd.printf("cm:%ld",dist );
Luminoscity 0:cb422b231ea5 95
Luminoscity 0:cb422b231ea5 96 count++;
Luminoscity 0:cb422b231ea5 97 lcd.locate(0,1);
Luminoscity 0:cb422b231ea5 98 lcd.printf("Distance =%d",count);
Luminoscity 0:cb422b231ea5 99
Luminoscity 0:cb422b231ea5 100 }
Luminoscity 0:cb422b231ea5 101 */