#include <SPI.h>
#define N1 10
#define N2 9
#define N3 8

byte Decode = 0x9;
byte Intensity = 0xA;
byte Scan = 0xB;
byte Shutdown = 0xC;
byte Test = 0xF;

byte A[] = {0x1F, 0x28, 0x48, 0x88, 0x88, 0x48, 0x28, 0x1F};
byte B[] = {0xFF, 0x91, 0x91, 0x91, 0x91, 0x91, 0x69, 0x06};
// Number 3
byte n1[] = {0x00, 0x7E, 0x81, 0x81, 0x81, 0x81, 0x7E, 0x00};
// Number 4
byte n2[] = {0x00, 0x7E, 0x81, 0x81, 0x81, 0x81, 0x7E, 0x00};
// Number 5
byte n3[] = {0x00, 0x72, 0x89, 0x89, 0x89, 0x89, 0x7E, 0x00}; 

void max7219(byte cs, byte r,byte d){
  digitalWrite(cs, LOW);  //選取晶片
  SPI.transfer(r);  //暫存器位址
  SPI.transfer(d);  //資料
  digitalWrite(cs, HIGH);  //取消選取晶片
}
void clear(byte cs){
  for(int i = 1;i <= 8;i++){
    max7219(cs, i, 0);
  }
}

void setup() {
  pinMode(N1, OUTPUT);
  pinMode(N2, OUTPUT);
  pinMode(N3, OUTPUT);

  SPI.begin();
  SPI.setClockDivider(SPI_CLOCK_DIV64);
  digitalWrite(N1, HIGH);
  digitalWrite(N2, HIGH);
  digitalWrite(N3, HIGH);
  delay(1);
  #if 0
  max7219(N1, Decode,0);
  max7219(N1, Intensity,7);
  max7219(N1, Scan,7);
  max7219(N1, Shutdown,1);
  max7219(N1, Test,0);
  clear(N1);

  max7219(N2, Decode,0);
  max7219(N2, Intensity,7);
  max7219(N2, Scan,7);
  max7219(N2, Shutdown,1);
  max7219(N2, Test,0);
  clear(N2);

  max7219(N3, Decode,0);
  max7219(N3, Intensity,7);
  max7219(N3, Scan,7);
  max7219(N3, Shutdown,1);
  max7219(N3, Test,0);
  clear(N3);
  #endif
  //delay(1000);
}

void loop() {
for(int i = 0; i< 8;i++){
    max7219(N1, i+1, n1[i]);
  }

  for(int i = 0; i< 8;i++){
    max7219(N2, i+1, n2[i]);
  }

  for(int i = 0; i< 8;i++){
    max7219(N3, i+1, n3[i]);
  }

  delay(500);
  clear(N1);
  clear(N2);
  clear(N3);
  delay(500);
}