lab4_demo_ultrasonic.ino
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#define BUTTON_PIN 2
#define SONIC_ECHO_PIN 3
#define SONIC_TRIG_PIN 4
const uint8_t debounceDelay = 50;
void setup()
{
/* Käivitame jadaühenduse */
Serial.begin(9600);
/* Seadistame surunupu */
pinMode(BUTTON_PIN, INPUT);
/* Seadistame ultraheli sisendi ja väljundi */
pinMode(SONIC_TRIG_PIN, OUTPUT);
pinMode(SONIC_ECHO_PIN, INPUT);
}
void loop()
{
if (ButtonRead())
{
float distance = GetDistInCm();
Serial.print("Roboti kaugus objektist on: ");
Serial.println(distance);
}
}
float GetDistInCm()
{
/* Saadame ultrahelilaine välja, kestvus 10 us */
digitalWrite(SONIC_TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(SONIC_TRIG_PIN, LOW);
/* Loeme signaali peegeldumise aja */
uint16_t echoTime = pulseIn(SONIC_ECHO_PIN, HIGH);
/* Asenda tagastus korrektse valemiga, mille leiad andmelehelt */
return 0.0f;
}
bool ButtonRead()
{
static bool lastButtonState = LOW;
static uint32_t lastDebounceTime = 0;
static bool buttonState = LOW;
bool btnReadValue = digitalRead(BUTTON_PIN);
if (btnReadValue != lastButtonState) {
lastDebounceTime = millis();
}
if ((millis() - lastDebounceTime) > debounceDelay) {
if (btnReadValue != buttonState) {
buttonState = btnReadValue;
if (buttonState == HIGH) {
return true;
}
}
}
lastButtonState = btnReadValue;
return false;
}