激光传感器的使用

 1 int lasersend = 2;
 2 
 3 int laserrev = 3;
 4 
 5 int revled = 13;
 6 
 7 int val;
 8 
 9 void setup() {
10 
11   // put your setup code here, to run once:
12 
13   pinMode(lasersend, OUTPUT);
14 
15   pinMode(laserrev, INPUT);
16 
17   pinMode(revled, OUTPUT);
18 
19   digitalWrite(lasersend; HIGH);
20 
21 }
22 
23  
24 
25 void loop() {
26 
27   // put your main code here, to run repeatedly:
28 
29   val = digitalRead(laserrev);
30 
31   if (val == HIGH)
32 
33   {
34 
35     digitalWrite(revled, HIGH);
36 
37   }
38 
39   else {
40 
41     digitalWrite(revled, LOW);
42 
43   }
44 
45 }