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67 lines
1.7 KiB
Plaintext
67 lines
1.7 KiB
Plaintext
/*
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Switch statement with serial input
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Demonstrates the use of a switch statement. The switch
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statement allows you to choose from among a set of discrete values
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of a variable. It's like a series of if statements.
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To see this sketch in action, open the Serial monitor and send any character.
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The characters a, b, c, d, and e, will turn on LEDs. Any other character will turn
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the LEDs off.
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The circuit:
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* 5 LEDs attached to digital pins 2 through 6 through 220-ohm resistors
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created 1 Jul 2009
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by Tom Igoe
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This example code is in the public domain.
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http://www.arduino.cc/en/Tutorial/SwitchCase2
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*/
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void setup() {
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// initialize serial communication:
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Serial.begin(9600);
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// initialize the LED pins:
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for (int thisPin = 2; thisPin < 7; thisPin++) {
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pinMode(thisPin, OUTPUT);
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}
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}
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void loop() {
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// read the sensor:
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if (Serial.available() > 0) {
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int inByte = Serial.read();
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// do something different depending on the character received.
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// The switch statement expects single number values for each case;
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// in this exmaple, though, you're using single quotes to tell
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// the controller to get the ASCII value for the character. For
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// example 'a' = 97, 'b' = 98, and so forth:
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switch (inByte) {
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case 'a':
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digitalWrite(2, HIGH);
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break;
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case 'b':
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digitalWrite(3, HIGH);
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break;
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case 'c':
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digitalWrite(4, HIGH);
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break;
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case 'd':
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digitalWrite(5, HIGH);
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break;
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case 'e':
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digitalWrite(6, HIGH);
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break;
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default:
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// turn all the LEDs off:
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for (int thisPin = 2; thisPin < 7; thisPin++) {
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digitalWrite(thisPin, LOW);
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}
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}
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}
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}
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