stephen mathenge / Mbed OS final-water-level_2

How to measure water in a reservoir

Dependencies:   Cayenne-MQTT-mbed Cayenne-LPP

HCSR04/hcsr04.cpp@0:7bfeb237e600, 2019-03-08 (annotated)

Committer:
wamae
Date:
Fri Mar 08 11:34:56 2019 +0000
Revision:
0:7bfeb237e600
working code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wamae 0:7bfeb237e600 1 /* Copyright (c) 2013 Prabhu Desai
wamae 0:7bfeb237e600 2 * pdtechworld@gmail.com
wamae 0:7bfeb237e600 3 *
wamae 0:7bfeb237e600 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
wamae 0:7bfeb237e600 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
wamae 0:7bfeb237e600 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
wamae 0:7bfeb237e600 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
wamae 0:7bfeb237e600 8 * furnished to do so, subject to the following conditions:
wamae 0:7bfeb237e600 9 *
wamae 0:7bfeb237e600 10 * The above copyright notice and this permission notice shall be included in all copies or
wamae 0:7bfeb237e600 11 * substantial portions of the Software.
wamae 0:7bfeb237e600 12 *
wamae 0:7bfeb237e600 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
wamae 0:7bfeb237e600 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
wamae 0:7bfeb237e600 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
wamae 0:7bfeb237e600 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
wamae 0:7bfeb237e600 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
wamae 0:7bfeb237e600 18 */
wamae 0:7bfeb237e600 19
wamae 0:7bfeb237e600 20
wamae 0:7bfeb237e600 21 #include "hcsr04.h"
wamae 0:7bfeb237e600 22
wamae 0:7bfeb237e600 23
wamae 0:7bfeb237e600 24 HCSR04::HCSR04(PinName TrigPin,PinName EchoPin):
wamae 0:7bfeb237e600 25 trigger(TrigPin), echo(EchoPin)
wamae 0:7bfeb237e600 26 {
wamae 0:7bfeb237e600 27 pulsetime.stop();
wamae 0:7bfeb237e600 28 pulsetime.reset();
wamae 0:7bfeb237e600 29 echo.rise(this,&HCSR04::isr_rise);
wamae 0:7bfeb237e600 30 echo.fall(this,&HCSR04::isr_fall);
wamae 0:7bfeb237e600 31 trigger=0;
wamae 0:7bfeb237e600 32 }
wamae 0:7bfeb237e600 33
wamae 0:7bfeb237e600 34 HCSR04::~HCSR04()
wamae 0:7bfeb237e600 35 {
wamae 0:7bfeb237e600 36 }
wamae 0:7bfeb237e600 37
wamae 0:7bfeb237e600 38 void HCSR04::isr_rise(void)
wamae 0:7bfeb237e600 39 {
wamae 0:7bfeb237e600 40 pulsetime.start();
wamae 0:7bfeb237e600 41 }
wamae 0:7bfeb237e600 42 void HCSR04::start(void)
wamae 0:7bfeb237e600 43 {
wamae 0:7bfeb237e600 44 trigger=1;
wamae 0:7bfeb237e600 45 wait_us(10);
wamae 0:7bfeb237e600 46 trigger=0;
wamae 0:7bfeb237e600 47 }
wamae 0:7bfeb237e600 48
wamae 0:7bfeb237e600 49 void HCSR04::isr_fall(void)
wamae 0:7bfeb237e600 50 {
wamae 0:7bfeb237e600 51 pulsetime.stop();
wamae 0:7bfeb237e600 52 pulsedur = pulsetime.read_us();
wamae 0:7bfeb237e600 53 distance= (pulsedur*343)/20000;
wamae 0:7bfeb237e600 54 pulsetime.reset();
wamae 0:7bfeb237e600 55 }
wamae 0:7bfeb237e600 56
wamae 0:7bfeb237e600 57 void HCSR04::rise (void (*fptr)(void))
wamae 0:7bfeb237e600 58 {
wamae 0:7bfeb237e600 59 echo.rise(fptr);
wamae 0:7bfeb237e600 60 }
wamae 0:7bfeb237e600 61 void HCSR04::fall (void (*fptr)(void))
wamae 0:7bfeb237e600 62 {
wamae 0:7bfeb237e600 63 echo.fall(fptr);
wamae 0:7bfeb237e600 64 }
wamae 0:7bfeb237e600 65
wamae 0:7bfeb237e600 66 unsigned int HCSR04::get_dist_cm()
wamae 0:7bfeb237e600 67 {
wamae 0:7bfeb237e600 68 return distance;
wamae 0:7bfeb237e600 69 }
wamae 0:7bfeb237e600 70 unsigned int HCSR04::get_pulse_us()
wamae 0:7bfeb237e600 71 {
wamae 0:7bfeb237e600 72 return pulsedur;
wamae 0:7bfeb237e600 73 }
wamae 0:7bfeb237e600 74
wamae 0:7bfeb237e600 75
wamae 0:7bfeb237e600 76
wamae 0:7bfeb237e600 77 /*******************************************************
wamae 0:7bfeb237e600 78 Here is a sample code usage
wamae 0:7bfeb237e600 79 *********************************************************
wamae 0:7bfeb237e600 80 #include "hcsr04.h"
wamae 0:7bfeb237e600 81 HCSR04 usensor(p25,p6);
wamae 0:7bfeb237e600 82 int main()
wamae 0:7bfeb237e600 83 {
wamae 0:7bfeb237e600 84 unsigned char count=0;
wamae 0:7bfeb237e600 85 while(1) {
wamae 0:7bfeb237e600 86 usensor.start();
wamae 0:7bfeb237e600 87 wait_ms(500);
wamae 0:7bfeb237e600 88 dist=usensor.get_dist_cm();
wamae 0:7bfeb237e600 89 lcd.cls();
wamae 0:7bfeb237e600 90 lcd.locate(0,0);
wamae 0:7bfeb237e600 91 lcd.printf("cm:%ld",dist );
wamae 0:7bfeb237e600 92
wamae 0:7bfeb237e600 93 count++;
wamae 0:7bfeb237e600 94 lcd.locate(0,1);
wamae 0:7bfeb237e600 95 lcd.printf("Distance =%d",count);
wamae 0:7bfeb237e600 96
wamae 0:7bfeb237e600 97 }
wamae 0:7bfeb237e600 98 */