mirror of
https://github.com/arduino/Arduino.git
synced 2024-12-05 16:24:12 +01:00
48 lines
1.0 KiB
C++
48 lines
1.0 KiB
C++
/*
|
|
For Loop Iteration
|
|
|
|
Demonstrates the use of a for() loop.
|
|
Lights multiple LEDs in sequence, then in reverse.
|
|
|
|
The circuit:
|
|
* LEDs from pins 2 through 7 to ground
|
|
|
|
created 2006
|
|
by David A. Mellis
|
|
modified 30 Aug 2011
|
|
by Tom Igoe
|
|
|
|
This example code is in the public domain.
|
|
|
|
http://www.arduino.cc/en/Tutorial/ForLoop
|
|
*/
|
|
|
|
int timer = 100; // The higher the number, the slower the timing.
|
|
|
|
void setup() {
|
|
// use a for loop to initialize each pin as an output:
|
|
for (int thisPin = 2; thisPin < 8; thisPin++) {
|
|
pinMode(thisPin, OUTPUT);
|
|
}
|
|
}
|
|
|
|
void loop() {
|
|
// loop from the lowest pin to the highest:
|
|
for (int thisPin = 2; thisPin < 8; thisPin++) {
|
|
// turn the pin on:
|
|
digitalWrite(thisPin, HIGH);
|
|
delay(timer);
|
|
// turn the pin off:
|
|
digitalWrite(thisPin, LOW);
|
|
}
|
|
|
|
// loop from the highest pin to the lowest:
|
|
for (int thisPin = 7; thisPin >= 2; thisPin--) {
|
|
// turn the pin on:
|
|
digitalWrite(thisPin, HIGH);
|
|
delay(timer);
|
|
// turn the pin off:
|
|
digitalWrite(thisPin, LOW);
|
|
}
|
|
}
|