daisychaining MAX7219

Using Arduino LEDs and Multiplexing
2

Well, if, for example, you have 4 max7219, you would do something like this:

    for (x = 1; x<8; x=x+1){
      digitalWrite (ss0, LOW);
      for (int m=0; m<4, m++) {
        SPI.transfer (x);
        SPI.transfer(displayArrayG [x-1]);// array 0 to 7
      }
      digitalWrite (ss0, HIGH);
    }

Paul