blob: f1edb2546b29aed154af13b0a255ac4163915a0b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/*
Switch statement
Demonstrates the use of a switch statement. The switch statement
allows you to choose from among a set of discrete values of a
variable. It's like a series of if statements.
To see this sketch in action, but the board and sensor in a well-lit
room, open the serial monitor, and and move your hand gradually down
over the sensor.
The circuit:
* photoresistor from analog in 0 to +5V
* 10K resistor from analog in 0 to ground
created 1 Jul 2009
by Tom Igoe
Ported to the Maple 27 May 2010
by Bryan Newbold
http://leaflabs.com/docs/lang/cpp/switchcase.html
*/
// These constants won't change:
const int sensorMin = 0; // sensor minimum, discovered through experiment
const int sensorMax = 600; // sensor maximum, discovered through experiment
void setup() {
Serial.begin(115200); // Ignored by Maple. But needed by boards using hardware serial via a USB to Serial adaptor
pinMode(0, INPUT_ANALOG);
}
void loop() {
// Read the sensor:
int sensorReading = analogRead(0);
// Map the sensor range to a range of four options:
int range = map(sensorReading, sensorMin, sensorMax, 0, 3);
// Do something different depending on the range value:
switch (range) {
case 0: // your hand is on the sensor
Serial.println("dark");
break;
case 1: // your hand is close to the sensor
Serial.println("dim");
break;
case 2: // your hand is a few inches from the sensor
Serial.println("medium");
break;
case 3: // your hand is nowhere near the sensor
Serial.println("bright");
break;
}
}
|
