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Added Switch-case 2

This commit is contained in:
Tom Igoe 2009-07-01 20:00:53 +00:00
parent dcacaae0bb
commit 072a86826c
1 changed files with 36 additions and 30 deletions
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56
build/shared/dist/examples/Control/switchCase2/switchCase2.pde vendored
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@ -10,7 +10,7 @@
the LEDs off. the LEDs off.
The circuit: The circuit:
* 5 LEDs attached to digital pins 2 through 6 * 5 LEDs attached to digital pins 2 through 6 through 220-ohm resistors
created 1 Jul 2009 created 1 Jul 2009
by Tom Igoe by Tom Igoe
@ -18,41 +18,47 @@
http://www.arduino.cc/en/Tutorial/SwitchCase2 http://www.arduino.cc/en/Tutorial/SwitchCase2
*/ */
// 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() { void setup() {
// initialize serial communication: // initialize serial communication:
Serial.begin(9600); Serial.begin(9600);
// initialize the LED pins:
for (int thisPin = 2; thisPin < 7; thisPin++) {
pinMode(thisPin, OUTPUT);
}
} }
void loop() { void loop() {
// read the sensor: // read the sensor:
int sensorReading = analogRead(0); if (Serial.available() > 0) {
// map the sensor range to a range of four options: int inByte = Serial.read();
int range = map(sensorReading, sensorMin, sensorMax, 0, 3); // do something different depending on the character received.
// The switch statement expects single number values for each case;
// in this exmaple, though, you're using single quotes to tell
// the controller to get the ASCII value for the character. For
// example 'a' = 97, 'b' = 98, and so forth:
// do something different depending on the switch (inByte) {
// range value: case 'a':
switch (range) { digitalWrite(2, HIGH);
case 0: // your hand is on the sensor
Serial.println("dark");
break; break;
case 1: // your hand is close to the sensor case 'b':
Serial.println("dim"); digitalWrite(3, HIGH);
break; break;
case 2: // your hand is a few inches from the sensor case 'c':
Serial.println("medium"); digitalWrite(4, HIGH);
break; break;
case 3: // your hand is nowhere near the sensor case 'd':
Serial.println("bright"); digitalWrite(5, HIGH);
break; break;
case 'e':
digitalWrite(6, HIGH);
break;
default:
// turn all the LEDs off:
for (int thisPin = 2; thisPin < 7; thisPin++) {
digitalWrite(thisPin, LOW);
}
}
}
} }
}