//T代表trig
//E代表echo
const int T2= 14;
const int E2= 15;
const int T1= 16;
const int E1= 17;
float s1;
float s2;
void setup()
{
Serial.begin(9600); //設(shè)置波特率
pinMode(T1, OUTPUT);
pinMode(E1, INPUT);
pinMode(T2, OUTPUT);
pinMode(E2, INPUT);
}
void loop()
{
digitalWrite(T1, LOW); //低高低電平發(fā)一個短時間脈沖去TrigPin
delayMicroseconds(2); // delayMicroseconds在更小的時間內(nèi)延時準確
digitalWrite(T1, HIGH);
delayMicroseconds(10);
digitalWrite(T1, LOW); //通過這里控制超聲波的發(fā)射
s1 = pulseIn(E1, HIGH) / 58.0; //將回波時間換算成cm
s1 = (int(s1 * 100.0)) / 100.0; //保留兩位小數(shù)
digitalWrite(T2, LOW);
delayMicroseconds(2);
digitalWrite(T2, HIGH);
delayMicroseconds(10);
digitalWrite(T2, LOW);
s2 = pulseIn(E2, HIGH) / 58.0; //將回波時間換算成cm
s2 = (int(s2 * 100.0)) / 100.0; //保留兩位小數(shù)
Serial.print("Distance:");
Serial.print(s1);
Serial.print("cm");
Serial.print("Distance:");
Serial.print(s2);
Serial.print("cm");
Serial.println();
delay(50);
}
|
