//GRobotronics 29/3/2014


unsigned char i;
unsigned char j; 
/*Port Definitions*/
int Max7219_pinCLK = 2;
int Max7219_pinCS = 1;
int Max7219_pinDIN = 0;

const int analogInPin = 3; 
int sensorValue = 0;       

unsigned char disp1[2][8]={
{0x00, 0x64, 0x62, 0x02, 0x02, 0x62, 0x64, 0x00},//0
{0x00, 0x22, 0x64, 0x04, 0x04, 0x64, 0x22, 0x00},//1

};
 
 
 
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£j??code of LED
        Write_Max7219_byte(dat);               //data£j??figure on LED 
        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()
{ 
 sensorValue = analogRead(analogInPin);
 if(sensorValue<500) happy();
 else sad();
   
   		
}
void happy(){
  for(i=1;i<9;i++){
   Write_Max7219(i,disp1[0][i-1]);
   }
}

void sad(){
  for(j=1;j<9;j++){
   Write_Max7219(j,disp1[1][j-1]);
   }
}