int MAXPINCLK = 10; // Define Digital Port 10
int MAXPINCS = 9; // Define Digital Port 9
int MAXPINDIN = 8; // Define Digital Port 8
 
unsigned char x; //occupies bytes on the memory 
unsigned char y; //occupies bytes on the memory
 
unsigned char disp1[38][8]={
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C}, //Char 0 
{0x10,0x18,0x14,0x10,0x10,0x10,0x10,0x10}, //Char 1 
{0x7E,0x2,0x2,0x7E,0x40,0x40,0x40,0x7E}, //Char 2 
{0x3E,0x2,0x2,0x3E,0x2,0x2,0x3E,0x0}, //Char 3  
{0x8,0x18,0x28,0x48,0xFE,0x8,0x8,0x8}, //Char 4 
{0x3C,0x20,0x20,0x3C,0x4,0x4,0x3C,0x0}, //Char 5 
{0x3C,0x20,0x20,0x3C,0x24,0x24,0x3C,0x0}, //Char 6 
{0x3E,0x22,0x4,0x8,0x8,0x8,0x8,0x8}, //Char 7  
{0x0,0x3E,0x22,0x22,0x3E,0x22,0x22,0x3E}, //Char 8 
{0x3E,0x22,0x22,0x3E,0x2,0x2,0x2,0x3E}, //Char 9 
{0x8,0x14,0x22,0x3E,0x22,0x22,0x22,0x22}, //Char A 
{0x3C,0x22,0x22,0x3E,0x22,0x22,0x3C,0x0}, //Char B 
{0x3C,0x40,0x40,0x40,0x40,0x40,0x3C,0x0}, //Char C 
{0x7C,0x42,0x42,0x42,0x42,0x42,0x7C,0x0}, //Char D 
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x7C}, //Char E 
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x40}, //Char F 
{0x3C,0x40,0x40,0x40,0x40,0x44,0x44,0x3C}, //Char G
{0x44,0x44,0x44,0x7C,0x44,0x44,0x44,0x44}, //Char H
{0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x7C}, //Char I
{0x3C,0x8,0x8,0x8,0x8,0x8,0x48,0x30}, //Char J
{0x0,0x24,0x28,0x30,0x20,0x30,0x28,0x24}, //Char K
{0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x7C}, //Char L
{0x81,0xC3,0xA5,0x99,0x81,0x81,0x81,0x81}, //Char M
{0x0,0x42,0x62,0x52,0x4A,0x46,0x42,0x0}, //Char N
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C}, //Char O
{0x3C,0x22,0x22,0x22,0x3C,0x20,0x20,0x20}, //Char P
{0x1C,0x22,0x22,0x22,0x22,0x26,0x22,0x1D}, //Char Q
{0x3C,0x22,0x22,0x22,0x3C,0x24,0x22,0x21}, //Char R
{0x0,0x1E,0x20,0x20,0x3E,0x2,0x2,0x3C}, //Char S
{0x0,0x3E,0x8,0x8,0x8,0x8,0x8,0x8}, //Char T
{0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1C}, //Char U
{0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18}, //Char V
{0x0,0x49,0x49,0x49,0x49,0x2A,0x1C,0x0}, //Char W
{0x0,0x41,0x22,0x14,0x8,0x14,0x22,0x41}, //Char X
{0x41,0x22,0x14,0x8,0x8,0x8,0x8,0x8}, //Char Y
{0x0,0x7F,0x2,0x4,0x8,0x10,0x20,0x7F}, //Char Z
};
 
void MX7219_WRITE_byte(unsigned char DATA)  {   
            unsigned char x;
     digitalWrite(MAXPINCS,LOW); 
     for(x=8;x>=1;x--)
          {   
             digitalWrite(MAXPINCLK,LOW);
             digitalWrite(MAXPINDIN,DATA&0x80);// Extracting a bit data
             DATA = DATA<<1;
             digitalWrite(MAXPINCLK,HIGH);
           }                                 
}
 
void MX7219_WRITE(unsigned char address,unsigned char dat) {
        digitalWrite(MAXPINCS,LOW);
        MX7219_WRITE_byte(address);           // The address code of the LED
        MX7219_WRITE_byte(dat);               //The data figure on LED 
        digitalWrite(MAXPINCS,HIGH);
}
 
void InitMAX7219(void) {
 MX7219_WRITE(0x09, 0x00);       //Set decoding BCD
 MX7219_WRITE(0x0a, 0x03);       //Set the brightness 
 MX7219_WRITE(0x0b, 0x07);       //Set scan & limit 8 LEDs
 MX7219_WRITE(0x0c, 0x01);       //On power-down mode is 0，normal mode is 1
 MX7219_WRITE(0x0f, 0x00);       //To test display 1 EOT，display 0
}
 
void setup() {
  
  pinMode(MAXPINCLK,OUTPUT);
  pinMode(MAXPINCS,OUTPUT);
  pinMode(MAXPINDIN,OUTPUT);
  delay(50);
  InitMAX7219();
}
 
void loop() { 
   for(y=0;y<38;y++) {
   for(x=1;x<9;x++)
    MX7219_WRITE(x,disp1[y][x-1]);
    delay(500);
  } 
}