ARDUINO TEST EXAMPLE code :
unsigned char i;
unsigned char j;
/*Port Definitions*/
int Max7219_pinCLK = 10;
int Max7219_pinCS = 9;
int Max7219_pinDIN = 8;
unsigned char disp1[10][8]={
{B00000000,B00111100,B01100110,B01100110,B01101110,B01110110,B01100110,B00111100},//0
{B00000000,B00001000,B00011000,B00111000,B00011000,B00011000,B00011000,B00111100},//1
{B00000000,B00111100,B01100110,B00000110,B00001100,B00011000,B00110000,B01111110},//2
{B00000000,B00111100,B01100110,B00000110,B00001100,B00000110,B01100110,B00111100},//3
{B00000000,B00100000,B01100000,B01101100,B01101100,B01111110,B00001100,B00001100},//4
{B00000000,B01111110,B01100000,B01100000,B01111100,B00000110,B01100110,B00111100},//5
{B00000000,B00111100,B01100110,B01100000,B01111100,B01100110,B01100110,B00111100},//6
{B00000000,B01111110,B00000110,B00000110,B00001100,B00011000,B00011000,B00011000},//7
{B00000000,B00111100,B01100110,B01100110,B00111100,B01100110,B01100110,B00111100},//8
{B00000000,B00111100,B01100110,B01100110,B00111110,B00000110,B01100110,B00111100},//9
};
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); //decodifica: BCD
Write_Max7219(0x0a, 0x06); //luminosità
Write_Max7219(0x0b, 0x07); //limite scan;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<10;j++)
{
for(i=1;i<9;i++)
Write_Max7219(i,disp1[j][i-1]);
delay(700);
}
}