LED Dot Matrix Display

				
					#define CLK 5
#define CS 6
#define DIN 7

byte num1[9] = {0x00,0x01,0x03,0x07,0x0f,0x1f,0x3f,0x7f,0xff};
byte num2[9] = {0x00,0x80,0xc0,0xe0,0xf0,0xf8,0xfe,0xfe,0xff};
byte num3[9] = {0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};

void setup() {
  // Initialize pins
  pinMode(DIN, OUTPUT);
  pinMode(CLK, OUTPUT);
  pinMode(CS, OUTPUT);
  sendCmd(0x09, 0x00);  // Turn off decoding mode
  sendCmd(0x0A, 0x03);  // Brightness setting (low brightness)
  sendCmd(0x0B, 0x07);  // Scan all 8 digits
  sendCmd(0x0C, 0x01);  // Normal working mode
  sendCmd(0x0F, 0x00);  // Turn off test mode
}
void loop() {
  for(int i=0;i<9;i++){
    sendCmd(1,num1[i]);//line 1
    delay(100);
    }
  for(int i=0;i<9;i++){
    sendCmd(2,num2[i]);//line 2
    delay(100);
    }
  for(int i=0;i<9;i++){
    sendCmd(3,num3[i]);//line 3
    delay(100);
    }
  for(int i=0;i<256;i++){
    sendCmd(4,i);//Line 4
    delay(50);
  }
}
void sendCmd(byte add1, byte dat1) {//Communication program
  digitalWrite(CS, LOW);    // Before communication, it is necessary to lower the voltage level
  for(byte i=0; i<8; i++){  //Shipping address
    digitalWrite(CLK, LOW);//Prepare to send
    digitalWrite(DIN,add1 & 0x80);//High bit in front
    add1 <<= 1;
    digitalWrite(CLK, HIGH);
  }
  // Send data
  for(byte i=0; i<8; i++){
    digitalWrite(CLK, LOW);
    digitalWrite(DIN,dat1 & 0x80);  
    dat1 <<= 1; 
    digitalWrite(CLK, HIGH); 
  }
  digitalWrite(CS, HIGH);//All data needs to be sent before raising the voltage level
}