/*
  Scrolling text in four 8x8 LED Dot Matrix displays
  using MaxMatrix library
*/

#include "MaxMatrix.h"
//#include "character_map.h"
#include "dor_matrix_font.h"

MaxMatrix My_LED_Dot_Matrix(DATA_IN, LOAD_IN, CLOCK_IN, MAX7219_IN_USE);

byte buffer[MAX_BUFFER];
char msg_text1[]= " Microprocessor and Microcontroller Systems   ";     //string text 1
char msg_text2[]= " Scrolling text demo in LED Dot Matrix Displays  "; //string text 2
char msg_text3[]= " using MaxMatrix Library in Arduino UNO   ";        //string text 3

void setup() 
{
  My_LED_Dot_Matrix.init();                       //module initialize
  My_LED_Dot_Matrix.setIntensity(LED_INTENSITY);  //dot matix intensity 0-15
}
void loop() 
{
  printStringWithShift(msg_text1, SCROLL_SPEED); //scroll and display msg_text1 
  printStringWithShift(msg_text2, SCROLL_SPEED); //scroll and display msg_text2
  printStringWithShift(msg_text3, SCROLL_SPEED); //scroll and display msg_text3  
}

//Display the extracted characters with scrolling
void printCharWithShift(char char_display, int shift_speed) 
{
  if (char_display < MAX_COL) 
    return;
    
  char_display -= MAX_COL;
  memcpy_P(buffer, char_map + MAX_INDEX*char_display, MAX_INDEX);
  
  My_LED_Dot_Matrix.writeSprite(MAX_COL, MIN_COL, buffer);
  My_LED_Dot_Matrix.setColumn(MAX_COL + buffer[MIN_BUF_INDEX], MIN_INDEX);
  
  for (int buff_index = MIN_BUF_INDEX; buff_index < buffer[MIN_BUF_INDEX] + 1; buff_index++)
  {
    delay(shift_speed);
    My_LED_Dot_Matrix.shiftLeft(false, false);
  }
}

// Extract the characters from the text string
void printStringWithShift(char* ptr_char, int shift_speed) 
{
  while (*ptr_char != NOT_EMPTY) 
  {
    printCharWithShift(*ptr_char, shift_speed);
    ptr_char++;
  }
}