mirror of
https://github.com/arduino/Arduino.git
synced 2024-12-13 23:48:46 +01:00
8f48433f33
This is required for Auto Format compatibility because it has the undesirable effect of indenting only unindented contents of multi-lline comments, thus altering the relative indentation of the text. The exception is the Max/MSP patches as I did not know whether indentation would break them.
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
/*
|
|
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, put the board and sensor in a well-lit
|
|
room, open the Serial Monitor, 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
|
|
modified 9 Apr 2012
|
|
by Tom Igoe
|
|
|
|
This example code is in the public domain.
|
|
|
|
http://www.arduino.cc/en/Tutorial/SwitchCase
|
|
*/
|
|
|
|
// these constants won't change. They are the
|
|
// lowest and highest readings you get from your sensor:
|
|
const int sensorMin = 0; // sensor minimum, discovered through experiment
|
|
const int sensorMax = 600; // sensor maximum, discovered through experiment
|
|
|
|
void setup() {
|
|
// initialize serial communication:
|
|
Serial.begin(9600);
|
|
}
|
|
|
|
void loop() {
|
|
// read the sensor:
|
|
int sensorReading = analogRead(A0);
|
|
// 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;
|
|
}
|
|
delay(1); // delay in between reads for stability
|
|
}
|