Hello
I bought a 7 segment display to play with on my new Arduino and I have a strange bug I can't seem to find an answer too. I know I should use (and eventually will) a shift register to run this thing, but for the time being, I wanted to run it directly off of the Arduino.
This ugly code works beautifully:
int a = 0; //Anode A is the top
int b = 1; //Anode B is upper right
int dp = 12; // DP
int c = 6; //Anode C is bottom right
int d = 3; //d bottom
int e = 4; // e bottom left
int f = 5; //G middle
int g = 7; //F top left
void setup(){
pinMode(a, OUTPUT); //Setting up pins as outputs
pinMode(b, OUTPUT);
pinMode(c, OUTPUT);
pinMode(d, OUTPUT);
pinMode(e, OUTPUT);
pinMode(f, OUTPUT);
pinMode(g, OUTPUT);
pinMode(dp, OUTPUT);
}
void loop(){
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(dp, LOW);
delay(100);
digitalWrite(a, HIGH);
delay(100);
digitalWrite(a, LOW);
digitalWrite(b, HIGH);
delay(100);
digitalWrite(b, LOW);
digitalWrite(c,HIGH);
delay(100);
digitalWrite(c, LOW);
digitalWrite(d, HIGH);
delay(100);
digitalWrite(d, LOW);
digitalWrite(e, HIGH);
delay(100);
digitalWrite(e, LOW);
digitalWrite(f, HIGH);
delay(100);
digitalWrite(f, LOW);
digitalWrite(g, HIGH);
delay(100);
digitalWrite(g, LOW);
digitalWrite(dp, HIGH);
delay(100);
}
But when I try to put all of this in an array and do essentially the same thing:
int a=0, b=1, c=6, d=3, e=4, f=5, g=7, dp= 12;
int pins[8] = {a, b, c, d, e, f, g, dp};
void setup(){
for (int i = 0; i == 7; i++) {
pinMode(pins[i], OUTPUT);
}
}
void loop()
{
for (int i = 0; i < 8; i++) {
digitalWrite(pins[i], HIGH);
delay(250);
digitalWrite(pins[i], LOW);
delay(250);
}
}
It lights up anode "A" constantly, and dimly lights the rest in sequence like I expect it too. "A" never goes out.
What's really confusing me is that I get perfect results with the first example. The segments light up clearly, and only the segment I ask to light up is lit. Nothing changes about the circuit either between the two sketches either.
Any thoughts?
Changed == to < and no problem!