Arduino void loop does not loop

Question

I am trying to blink an Array of LEDs hooked up to a pin on the Arduino.

When I upload the code onto my Arduino :

//array of pins
int allLEDPins[4] = {2, 3, 4, 5};

//the chase function
void Chaster(int* anArray) {
  for (int i = 0; i < 5; i++) {
    digitalWrite(allPins[i], HIGH);
    delay(200);
    digitalWrite(allPins[i], LOW);
    delay(200);
  }
}

//setup pins
void setup() {
  pinMode(allPins[0], OUTPUT);
  pinMode(allPins[1], OUTPUT);
  pinMode(allPins[2], OUTPUT);
  pinMode(allPins[3], OUTPUT);
}

void loop() {
  Chaster(allLEDPins);
}

The loop function does not loop. I am using an Arduino Zero in Arduino IDE 1.6.8 on my Windows 10 machine. Thank you in advance.

Arton Dorneles · Accepted Answer · 2016-02-20 15:31:37Z

2

You are accessing an index out of range in the for loop inside the function Chaster. Note that your array allLEDPins have only 4 elements and you tried to access allLEDPins[4] while the last element is allLEDPins[3]. This causes an error during running time.

In order to fix that, replace for (int i = 0; i < 5; i++) by for (int i = 0; i < 4; i++)

edited Feb 20, 2016 at 15:31

answered Feb 20, 2016 at 15:24

Arton Dorneles

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1 Comment

user3520669 Over a year ago

Thank you. By changing the for loop, it all worked out!

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