// From http://www.electrodragon.com/w/Dot_Matrix_Display_Kit_w/MAX7219_IC,_PCB

unsigned char i;
unsigned char j; 
/*Port Definitions*/
int Max7219_pinCLK = 10;
int Max7219_pinCS = 9;
int Max7219_pinDIN = 8;

unsigned char disp1[38][8]={
  {
    0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C  }
  ,//0
  {
    0x10,0x18,0x14,0x10,0x10,0x10,0x10,0x10  }
  ,//1
  {
    0x7E,0x2,0x2,0x7E,0x40,0x40,0x40,0x7E  }
  ,//2
  {
    0x3E,0x2,0x2,0x3E,0x2,0x2,0x3E,0x0  }
  ,//3
  {
    0x8,0x18,0x28,0x48,0xFE,0x8,0x8,0x8  }
  ,//4
  {
    0x3C,0x20,0x20,0x3C,0x4,0x4,0x3C,0x0  }
  ,//5
  {
    0x3C,0x20,0x20,0x3C,0x24,0x24,0x3C,0x0  }
  ,//6
  {
    0x3E,0x22,0x4,0x8,0x8,0x8,0x8,0x8  }
  ,//7
  {
    0x0,0x3E,0x22,0x22,0x3E,0x22,0x22,0x3E  }
  ,//8
  {
    0x3E,0x22,0x22,0x3E,0x2,0x2,0x2,0x3E  }
  ,//9
  {
    0x8,0x14,0x22,0x3E,0x22,0x22,0x22,0x22  }
  ,//A
  {
    0x3C,0x22,0x22,0x3E,0x22,0x22,0x3C,0x0  }
  ,//B
  {
    0x3C,0x40,0x40,0x40,0x40,0x40,0x3C,0x0  }
  ,//C
  {
    0x7C,0x42,0x42,0x42,0x42,0x42,0x7C,0x0  }
  ,//D
  {
    0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x7C  }
  ,//E
  {
    0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x40  }
  ,//F
  {
    0x3C,0x40,0x40,0x40,0x40,0x44,0x44,0x3C  }
  ,//G
  {
    0x44,0x44,0x44,0x7C,0x44,0x44,0x44,0x44  }
  ,//H
  {
    0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x7C  }
  ,//I
  {
    0x3C,0x8,0x8,0x8,0x8,0x8,0x48,0x30  }
  ,//J
  {
    0x0,0x24,0x28,0x30,0x20,0x30,0x28,0x24  }
  ,//K
  {
    0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x7C  }
  ,//L
  {
    0x81,0xC3,0xA5,0x99,0x81,0x81,0x81,0x81  }
  ,//M
  {
    0x0,0x42,0x62,0x52,0x4A,0x46,0x42,0x0  }
  ,//N
  {
    0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C  }
  ,//O
  {
    0x3C,0x22,0x22,0x22,0x3C,0x20,0x20,0x20  }
  ,//P
  {
    0x1C,0x22,0x22,0x22,0x22,0x26,0x22,0x1D  }
  ,//Q
  {
    0x3C,0x22,0x22,0x22,0x3C,0x24,0x22,0x21  }
  ,//R
  {
    0x0,0x1E,0x20,0x20,0x3E,0x2,0x2,0x3C  }
  ,//S
  {
    0x0,0x3E,0x8,0x8,0x8,0x8,0x8,0x8  }
  ,//T
  {
    0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1C  }
  ,//U
  {
    0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18  }
  ,//V
  {
    0x0,0x49,0x49,0x49,0x49,0x2A,0x1C,0x0  }
  ,//W
  {
    0x0,0x41,0x22,0x14,0x8,0x14,0x22,0x41  }
  ,//X
  {
    0x41,0x22,0x14,0x8,0x8,0x8,0x8,0x8  }
  ,//Y
  {
    0x0,0x7F,0x2,0x4,0x8,0x10,0x20,0x7F  }
  ,//Z
};



void Write_Max7219_byte(unsigned char DATA) 
{   
  unsigned char i;
  digitalWrite(Max7219_pinCS,LOW);		
  for(i=8;i>=1;i--)
  {		  
    digitalWrite(Max7219_pinCLK,LOW);
    digitalWrite(Max7219_pinDIN,DATA&0x80);// Extracting a bit data
    DATA = DATA<<1;
    digitalWrite(Max7219_pinCLK,HIGH);
  }                                 
}


void Write_Max7219(unsigned char address,unsigned char dat)
{
  digitalWrite(Max7219_pinCS,LOW);
  Write_Max7219_byte(address);           //address，code of LED
  Write_Max7219_byte(dat);               //data，figure on LED 
  digitalWrite(Max7219_pinCS,HIGH);
}

void Init_MAX7219(void)
{
  Write_Max7219(0x09, 0x00);       //decoding ：BCD
  Write_Max7219(0x0a, 0x03);       //brightness 
  Write_Max7219(0x0b, 0x07);       //scanlimit；8 LEDs
  Write_Max7219(0x0c, 0x01);       //power-down mode：0，normal mode：1
  Write_Max7219(0x0f, 0x00);       //test display：1；EOT，display：0
}



void setup()
{

  pinMode(Max7219_pinCLK,OUTPUT);
  pinMode(Max7219_pinCS,OUTPUT);
  pinMode(Max7219_pinDIN,OUTPUT);
  delay(50);
  Init_MAX7219();
}


void loop()
{ 
  for(j=0;j<38;j++)
  {
    for(i=1;i<9;i++)
      Write_Max7219(i,disp1[j][i-1]);
    delay(500);
  } 		
}