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38 lines
982 B
Plaintext
38 lines
982 B
Plaintext
/*
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* Loop
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* by David A. Mellis
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*
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* Lights multiple LEDs in sequence, then in reverse. Demonstrates
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* the use of a for() loop and arrays.
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*
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* http://www.arduino.cc/en/Tutorial/Loop
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*/
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int timer = 100; // The higher the number, the slower the timing.
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int pins[] = { 2, 3, 4, 5, 6, 7 }; // an array of pin numbers
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int num_pins = 6; // the number of pins (i.e. the length of the array)
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void setup()
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{
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int i;
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for (i = 0; i < num_pins; i++) // the array elements are numbered from 0 to num_pins - 1
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pinMode(pins[i], OUTPUT); // set each pin as an output
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}
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void loop()
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{
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int i;
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for (i = 0; i < num_pins; i++) { // loop through each pin...
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digitalWrite(pins[i], HIGH); // turning it on,
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delay(timer); // pausing,
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digitalWrite(pins[i], LOW); // and turning it off.
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}
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for (i = num_pins - 1; i >= 0; i--) {
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digitalWrite(i, HIGH);
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delay(timer);
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digitalWrite(i, LOW);
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}
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}
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