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HC_SR04.cpp
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HC_SR04.cpp
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#include "HC_SR04.h"
double HC_SR04::getDistance()
{
digitalWrite(pinTrigger, LOW);
delayMicroseconds(2);
digitalWrite(pinTrigger, HIGH);
delayMicroseconds(pulseLength_microSec);
digitalWrite(pinTrigger, LOW);
double duration = pulseIn(pinEcho, HIGH);
switch (currentUnit) {
case Units::cms:
return duration / conversionRateCms;
case Units::in:
return duration / conversionRateIn;
default:
return -1;
}
}
HC_SR04::HC_SR04(int pinTrigger)
{
this->pinTrigger = pinTrigger;
this->pinEcho = ++pinTrigger;
InitializePinMode();
}
HC_SR04::HC_SR04(int pinTrigger, int pinEcho) {
this->pinTrigger = pinTrigger;
this->pinEcho = pinEcho;
InitializePinMode();
}
void HC_SR04::setUnits(HC_SR04::Units option) {
currentUnit = option;
}
void HC_SR04::InitializePinMode() {
pinMode(this->pinTrigger, OUTPUT);
pinMode(this->pinEcho, INPUT);
}