Ultrasonic range finder- Amarino Evaluation shield
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| #include <LiquidCrystal.h> | |
| LiquidCrystal lcd(13, 12, 10, 9, 8, 7); | |
| int TrigPin = 4; | |
| int EchoPin = 2; | |
| void setup() | |
| { | |
| lcd.begin(16, 2); | |
| Serial.begin(9600); | |
| pinMode(TrigPin,OUTPUT); | |
| pinMode(EchoPin,INPUT); | |
| } | |
| void loop() | |
| { | |
| int distance,duration; | |
| digitalWrite(TrigPin,HIGH);//TrigPin prepare high of more than 10us | |
| delayMicroseconds(11); | |
| digitalWrite(TrigPin,LOW); | |
| duration = pulseIn(EchoPin, HIGH);//EchoPin received high start counting until the receiver to the low,return to the count valu | |
| duration = duration/29/2;//Calculating the distance cm | |
| // The speed of sound is 340 m/s or 29 microseconds per centimeter. | |
| lcd.clear(); | |
| lcd.print("Distance:"); | |
| lcd.print(duration); | |
| Serial.print(duration);//Serial display distance | |
| lcd.print("cm"); | |
| Serial.print("cm"); | |
| Serial.println(); | |
| delay(1000); | |
| } |
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