#include "letters.h"
#include <EEPROM.h>

//Defines column pins
#define C0 22
#define C1 23
#define C2 24
#define C3 25
#define C4 26
#define C5 27
#define C6 28
#define C7 29

//Defines row pins
#define R0 32
#define R1 33
#define R2 34
#define R3 35
#define R4 36
#define R5 37
#define R6 38
#define R7 39

String toPrint = "zach"; //Sets the text to be printed
char wordChar[4]; //Creates a character array to store the characters
int printLen = 0;

const int rows[] = { //Creates an array of the rows
  R0, R1, R2, R3, R4, R5, R6, R7
};

const int cols[] = { //Creates an array of the columns
  C0, C1, C2, C3, C4, C5, C6, C7
};

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  
  for(int i = 0; i < 8; i++) { //Sets all of the pins to output
    pinMode(rows[i], OUTPUT);
    pinMode(cols[i], OUTPUT);
  }
  clearMatrix(); //Clears the leds
  for (int i = 0; i < toPrint.length(); i++) { //Writes the characters to the array
    wordChar[i] = toPrint.charAt(i);
  }
  printLen = toPrint.length();
}

void loop() {

  int letterIndex;
  
  for (int letterStep = 0; letterStep < printLen; letterStep++) { //Steps through each letter
    char let = wordChar[letterStep]; //Sets the character next being displayed
    for (int i = 0; i < 26; i++) { //Checks the letter against each entry in the alphabet array
      if (letterArray[i] == let) {
        letterIndex = i;
        break;
      } 
      if (i == 25) { //Non numeric character
        letterIndex = 26;
      }      
    }
    
    for (int offset = -6; offset < 6; offset++) { //Sets the offset
      for (int column = 0; column < 8; column++) { //Steps through each column
        if (offset + column <= 8 && offset + column >= 0) {  //Checks if indicies are within the correct range
          for (int row = 0; row < 8; row++) { //Steps through each row in the column
            digitalWrite(rows[row], library_display[letterIndex][row][column + offset]); //turns on if the character table is 1
          }
        }
        digitalWrite(cols[column], LOW); //Sets the column targeted to low
        delay(1); //delay to breifly flash the led on
        digitalWrite(cols[column], HIGH); //Sets the column targeted to high
      }
      clearMatrix(); // clear matrix
      delay(100); //waits 100ms before drawing the next frame
    }
  }
}

void clearMatrix() { //Clears the matrix
  for(int i = 0; i < 8; i++) {
    digitalWrite(rows[i], LOW); //Sets all the rows to low
    digitalWrite(cols[i], HIGH); //Sets all the columns to high
  }
}