[Arduino] MAX 7219 模組

不多說，照片先來一張模組的照片，這個模組

搭配一顆Max7219 IC以及8*8 LED 矩陣，可以大大簡化我們對16支

腳位的控制，只要將編碼好的值寫入即可。

首先先接一下線，版子上面有5支腳


模組             Arduino
VCC    ---> VCC
GND   ---> GND
DIN     ----> Digital 8
CS       ---> Digital 9
CLK     ----> Digital 10

unsigned char i;
unsigned char j; 
 
int Max7219_pinCLK = 10;
int Max7219_pinCS = 9;
int Max7219_pinDIN = 8;


unsigned char disp2[6][8]={
  0x00,0x20, 0x20, 0x20, 0x20, 0x20, 0x3C, 0x00,  // L
  0x00,0x38, 0x10, 0x10, 0x10, 0x10, 0x38, 0x00,  // I
  0x00,0x20, 0x20, 0x20, 0x20, 0x20, 0x3C, 0x00,  // L
  0x00,0x38, 0x10, 0x10, 0x10, 0x10, 0x38, 0x00,  // I
  0x00,0x18, 0x24, 0x24, 0x24, 0x3C, 0x24, 0x00,  // A
  0x00,0x32, 0x2A, 0x26, 0x22, 0x22, 0x22, 0x00,  // N
};

 
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);
    DATA = DATA<<1;
    digitalWrite(Max7219_pinCLK,HIGH);
  }                                 
}
 
void Write_Max7219(unsigned char address,unsigned char dat)
{
  digitalWrite(Max7219_pinCS,LOW);
  Write_Max7219_byte(address);          
  Write_Max7219_byte(dat);               
  digitalWrite(Max7219_pinCS,HIGH);
}
 
void Init_MAX7219(void)
{
  Write_Max7219(0x09, 0x00);      
  Write_Max7219(0x0a, 0x03);      
  Write_Max7219(0x0b, 0x07);       
  Write_Max7219(0x0c, 0x01);      
  Write_Max7219(0x0f, 0x00);      
}
 
void setup()
{
 
  pinMode(Max7219_pinCLK,OUTPUT);
  pinMode(Max7219_pinCS,OUTPUT);
  pinMode(Max7219_pinDIN,OUTPUT);
  delay(50);
  Init_MAX7219();
}
 
void loop()
{ 
  for(j=0;j<6;j++)
  {
    for(i=1;i<9;i++)
      Write_Max7219(i,disp2[j][i-1]);
    delay(1000);
  }   
}

這樣子就會連續的顯示

L  ->  I  -> L ->  I  ->  A  -> N


程式碼來源：

http://www.electroschematics.com/10510/arduino-8-8-led-matrix/