/*F********************************************************************
* We always have to include the library
**********************************************************************/
#include "LedControl.h"

/*I*******************************************************
 Now we need a LedControl to work with.
 ***** These pin numbers will probably not work with your hardware *****
 pin 12 is connected to the DataIn 
 pin 11 is connected to the CLK 
 pin 10 is connected to LOAD 
 We have only a single MAX72XX.
 ********************************************************/

//************************* DEFINES ************************************

//************************* PROTOTYPES ************************************
void writeArduinoOn7Segment(); 
void scrollDigits(); 

//************************* VARIABLES ************************************
LedControl lc = LedControl( 12, 11, 10, 1 );

unsigned long delaytime = 250; // always wait a bit between display updates 

/*F********************************************************************
*
**********************************************************************/
void 
setup() 
{
	// MAX72XX IN POWER-SAVING MODE ON STARTUP, NEEDS A WAKEUP CALL
	lc.shutdown( 0, false );
	lc.setIntensity( 0, 8);                // SET BRIGHTNESS TO A MEDIUM VALUE
	lc.clearDisplay( 0 );                                 // AND CLEAR DISPLAY
}
/*F********************************************************************
*
**********************************************************************/
void 
loop() 
{ 
	writeArduinoOn7Segment();
	scrollDigits();
}
/*F********************************************************************
* This method will display characters for word "Arduino" one after other on
 digit 0. 
**********************************************************************/
void 
writeArduinoOn7Segment() 
{
	lc.setChar( 0, 0, 'a', false);
	delay( delaytime );
	lc.setRow( 0, 0, 0x05 );
	delay( delaytime );
	lc.setChar( 0, 0, 'd', false );
	delay( delaytime );
	lc.setRow( 0, 0, 0x1c );
	delay( delaytime );
	lc.setRow( 0, 0, B00010000 );
	delay( delaytime );
	lc.setRow( 0, 0, 0x15);
	delay( delaytime );
	lc.setRow( 0, 0, 0x1D);
	delay( delaytime );
	lc.clearDisplay( 0 );
	delay( delaytime );
} 
/*F********************************************************************
* This method will scroll all the hexa-decimal numbers and letters on the 
display. You will need at least four 7-Segment digits. otherwise it won't 
really look that good.
**********************************************************************/
void 
scrollDigits() 
{
	for( int i =0; i < 13; i++) 
	{
		lc.setDigit( 0, 3, i, false );
		lc.setDigit( 0, 2, i + 1, false );
		lc.setDigit( 0, 1, i + 2, false );
		lc.setDigit( 0, 0, i + 3, false );
		delay( delaytime );
	}
	lc.clearDisplay( 0 );
	delay( delaytime );
}