/**************************************************
u8g2_font_6x10_mr: A compact font that is 6 pixels wide and 10 pixels high.
u8g2_font_6x12_mr: Slightly taller than the 6x10, providing a bit more legibility.
u8g2_font_7x14_tf: A taller font that is 7 pixels wide and 14 pixels high, good for displays with more vertical space.
u8g2_font_5x8_tf: A smaller font that is 5 pixels wide and 8 pixels high, useful for fitting more text on a screen.

****************************************/
#include <Arduino.h>
#include <U8g2lib.h>

#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
#ifdef U8X8_HAVE_HW_I2C
#include <Wire.h>
#endif

// Initialize the display
U8G2_MAX7219_32X8_F_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ U8X8_PIN_NONE, /* reset=*/ U8X8_PIN_NONE);

void setup(void) {
  // Begin the display
  u8g2.begin();
  // Set the display contrast
  u8g2.setContrast(160);
}

void loop(void) {
  // Set the font for the display uncomment witch you want to use
  // u8g2.setFont(u8g2_font_victoriabold8_8r);
  //u8g2.setFont(u8g2_font_6x10_mr);
  //u8g2.setFont(u8g2_font_6x12_mr);
  // u8g2.setFont(u8g2_font_7x14_tf);
  u8g2.setFont(u8g2_font_5x8_tf);
 


  
  // Calculate the width of the string
  int strWidth = u8g2.getStrWidth("  HI I AM ARVIND FROM INDIA HAVE A NICE DAY");
  
  // Loop to scroll the text from right to left
  for (int i = 64; i >= -strWidth; i--) {
    u8g2.clearBuffer(); // clear the internal memory
    u8g2.drawStr(i, 8, "I AM ARVIND FROM INDIA  HAVE A NICE DAY "); // write something to the internal memory
   
   
   
    u8g2.sendBuffer(); // transfer internal memory to the display
    delay(100); // delay between each scroll step
  }
}