/*This software is provided in an “AS IS” condition,NO WARRANTIES in any form apply to this software.
 picmicrolab.com 10.17.2017
***************************************************************************************************************
//Arduino 7-Segment LED Display MAX7219

*/


//2- Data Out
//3- CLK
//4 -Load
int DataOUT = 2;
int CLK = 3;
int Load = 4;
void setup() 
{
 // initialize I/O pins.
   pinMode(DataOUT, OUTPUT); //
   pinMode(CLK, OUTPUT); //
   pinMode(Load, OUTPUT); //

   SendDataMax7219(0xfc,0xff);//Normal Operation
   SendDataMax7219(0xf9,0xff);//Decode Mode - Code B Font
   //SendDataMax7219(0xff,0xff);//Display Test
    //SendDataMax7219(0xfa,0xf0);//Intensity
}

void loop() 
{
SendDataMax7219(0xf1,0x00);// - Show 0 - Code B Font
delay(1000);
SendDataMax7219(0xf1,0x01);// - Show 1
delay(1000);
SendDataMax7219(0xf1,0x02);// - Show 2
delay(1000);
SendDataMax7219(0xf1,0x03);// - Show 3
delay(1000);
SendDataMax7219(0xf1,0x04);// - Show 4
delay(1000);
SendDataMax7219(0xf1,0x05);// - Show 5
delay(1000);
SendDataMax7219(0xf1,0x06);// - Show 6
delay(1000);
SendDataMax7219(0xf1,0x07);// - Show 7
delay(1000);
SendDataMax7219(0xf1,0x08);// - Show 8
delay(1000);
SendDataMax7219(0xf1,0x09);// - Show 9
delay(1000);
}

void SendDataMax7219(int HighByte,int LowByte)
{
  //---------------Send High Byte--------------
  for(int i=7;i>-1;i--)
  {
   if(bitRead(HighByte, i)== HIGH)
   {
   digitalWrite(DataOUT,HIGH);
   //delay(1);
   digitalWrite(CLK,HIGH);
   //delay(1);
   digitalWrite(CLK,LOW);
   //delay(1);
   }
   if(bitRead(HighByte, i)== LOW)
   {
   digitalWrite(DataOUT,LOW);
   //delay(1);
   digitalWrite(CLK,HIGH);
   //delay(1);
   digitalWrite(CLK,LOW);
   //delay(1);
   }

  }
  //------------------------------------------
  //---------------Send Low Byte--------------
  for(int i=7;i>-1;i--)
  {
   if(bitRead(LowByte, i)== HIGH)
   {
   digitalWrite(DataOUT,HIGH);
   //delay(1);
   digitalWrite(CLK,HIGH);
   //delay(1);
   digitalWrite(CLK,LOW);
   //delay(1);
   }
   if(bitRead(LowByte, i)== LOW)
   {
   digitalWrite(DataOUT,LOW);
   //delay(1);
   digitalWrite(CLK,HIGH);
   //delay(1);
   digitalWrite(CLK,LOW);
   //delay(1);
   }
   
  }
  //----------------------------------------
  //--------Load 16 bit number in MAX7219---
   //delay(1);
   digitalWrite(Load,HIGH);
   //delay(1);
   digitalWrite(Load,LOW);
   //delay(1);

  //----------------------------------------

}