// (Worksheet 4.5.1 - Pin Maps, Initialization)

// (Worksheet 4.5.1 Number 4.)
// The const keyword is a variable qualifier that tells the compiler that we don't want this variable's value to change
// It is a great way to define things like pins and colors.
// Here we define all the i/o pins by name; once, and only once.
//
const int red1=13;
const int red2=12;

// Adjust the numbers of the Arduino digital i/o pins to match your group’s schematic.
// Add 4 more lines of code to assign pin numbers for the Blue and Green pins. 

const int row0 = 0;
const int row1 = 1;

// Add 6 more lines of code to assign pin numbers for the remaining 6 rows.

// Add 1 line of code to define a constant for the magneticSensor.



// (Worksheet 4.5.1 Number 5.)
// Add 3 lines of code to define aliases for red, blue, and green. 
// These constants help us navigate through the image file

// putting the color and row pins in arrays lets us reference them with loop counters
// defining a variable outside of the program loops makes it global so every function in this file can reference it.

// (Worksheet 4.5.1 Number 6.)
// Define a constant array for the 8 row pins.
const int rowPin[8] = {
  row0, row1, //Finish this statement. 
};


// (Worksheet 4.5.1 Number 7.)
// Define an array that contains the first Red, Green, and Blue color pins. 
int colorPin[3] = {
  //Add array elements here
};

// (Worksheet 4.5.1 Number 7.)
// The second row of color pins is necessary because each pin can only drive four LEDs at a time at 10mA each.
// Define another array called colorPin2 that contains the second set of Red, Green, and Blue 
// color pins using the above array as an example.
 

// To turn on an LED, we have to set the Color pin HIGH and the row pin LOW.  
// Only one Color pin should be on at a time.
// To avoid driving the LED backwards we can't drive the row pins HIGH, we have to turn them off by 
// setting them up as INPUTS

// (Worksheet 4.5.1 Number 8.)
// Write a function here that will turn all 6 color pins off by using the “digitalWrite” 
// command and setting the color pins LOW.  You have been given the initial function 
// definition statement and one of the necessary “digitalWrite” statements.
// You need to fill in the rest of the statements that the function will 
// do when it is called. 
// 
void clearColorPins(void) {
  // Turn all color drivers off
  digitalWrite(red1,LOW);
   
}

// Here is a function that will turn OFF only one pair of color pins.  
// This routine could be used instead of clearColorPins if we are careful to keep track of
// which one is on.
void clearColorPin(int color) {
  digitalWrite(colorPin[color],LOW);
  digitalWrite(colorPin2[color],LOW);
}

// (Worksheet 4.5.1 Number 9.)
// Write a function called setColorPin() that will turn ON one pair of color pins. 
void setColorPin(int color) {
  // make sure only one color is on at a time - turn everything off first then turn the one we want on
    
}


// (Worksheet 4.5.1 Number 10.)
// Setting the pin mode to OUTPUT turns the LED on, setting pin mode to INPUT turns the 
// LED off.  The value should always be LOW.  
// Write a function called setRowPin(int row) to set (turn on) a row pin. 

// Write a function called clearRowPin(int row) to clear (turn off) a row pin.  (Worksheet 4.5.1 Number 10.)



// Everything above this point is a definition.
// setup() is where things actually start to run.
void setup() {
  // put your setup code here, to run once:

  // (Worksheet 4.5.1 Number 11.)
  // The color pins will be driven HIGH to turn them on, LOW to turn them off
  // for starters we turn them all off and set them as outputs
  clearColorPins(); // We have a function to set them all low
  
  // Now set the pinModes - I've given you one, do the rest
  pinMode(red1,OUTPUT);
  
  // (Worksheet 4.5.1 Number 11.)
  // The row pins will always be LOW
  // We turn them on and off by changing their pinMode
  // Add code to set the value LOW and pinMode to INPUT for each row pin (Worksheet 4.3.2 Number 11.)
  digitalWrite(row0,LOW); // need 7 more
  
  pinMode(row0,INPUT);  // need 7 more: is there an easier way to do this?


  // (Worksheet 4.5.1 Number 11.)
  // Write the necessary statements to set the magnetic sensor as an INPUT with a value of HIGH.

    
  // (Worksheet 4.5.1 Number 13, 14 & 15.)    
  // Write code here to turn your LED ON and OFF and change its color.  
  // Use the functions we've created in this worksheet.

 
}

void loop() {
  }