array question

Using Arduino Programming Questions
1

Ok so i'm making a led cube and all that's left to do is program the arduino.

/*
*3D LED Cube (Preliminary Code)
*Counts to 25 then convert to Binary and Light Cube
*
*/


int ledPins[6];
int pinCount = 6;
int iterations = 24;
int timer = 100;

void setup() {
  int pins;
  for(int pins = 0; pins < pinCount; pins++)  {
    pinMode(ledPins[pins],OUTPUT);}
//  pinMode(2, OUTPUT); // Sets pin '2' as LSB
//  pinMode(3, OUTPUT); // 
//  pinMode(4, OUTPUT); //  COMMENTED OUT; SMALLER CODE ABOVE
//  pinMode(5, OUTPUT); //
//  pinMode(6, OUTPUT); // Sets pin '6' as MSB
}
void loop(){
  int Iiterations;
  for(int Iiterations = 0; Iiterations < iterations; Iiterations++)  {
  digitalWrite (6,HIGH);
  }
}

The program above is what i have so far...but just for starters im only going to light up the top layer of cube in a counting sequence to help me understand arduino better. Now what i have my arduino connected to is 2(two) 74hc4514 4:16 demultiplexers. I only want to use 5-6 outputs on my arduino to control the cube using binary code to select an led
EX: 00000 = Led 1; 00001 = led 2;......01010 = led 11.
The issue that i'm having is i want to store each individual bit in the array.
EX: The binary 0(zero) will be stored in the array as 0|0|0|0|0; 1 = 0|0|0|0|1........ect.
I know how to convert to binary but as far as separating the number and storing these values i get stuck...
... Im not asking anyone to write the code or anything but what is the best method to go about doing this??

2

Variable names differing only by case is a bug waiting to happen.

3

Iiterations

I - iterations ? What's the rationale behind this strange naming scheme ?

4

Seems to work for Apple. :slight_smile:

5

AWOL:
Seems to work for Apple. :slight_smile:

For Aapple, probably... If he worked for Apple, he'd write iIterations... :stuck_out_tongue:

6

the i at the beginning stands for initial... so that i know that it starts at zero... im more of a hardware person... im fairly new to programming. I know some basics but i want to understand more how to use arrays. i think the best way to do it is to count in binary from 0 to 24 and just have it display on the top layer of the cube rather than using a 7 segment led display

7

Ok let's try to be constructive...

void loop(){
    // local variable to be used as for() index -> ok (more on its name later)
    int Iiterations;
    // the index variable is redeclared -> ok but makes previous declaration redundant
    for(int Iiterations = 0; Iiterations < iterations; Iiterations++)  {
        // no need to repeatedly "write" the same state to a pin
        digitalWrite (6,HIGH);
    }
}

About the variable names, better (and more standard) choices would have been:

void loop(){
    int i;
    for(i = 0; i < numIterations; i++)  {
        digitalWrite (6,HIGH);
    }
}
8

I don't really see the point of setting the same pin high more than once, unless you just need to kill some time.