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Embedded C code for Single 7 Segment display


Sample code for Single 7 Segment display delay subroutine.
Following code can be using for AVR series ICs like: ATmega8, ATmega16, ATmega32. 

 

#include <avr/io.h>
#include <util/delay.h>

#define	 DISPLAY_PORT	PORTD
#define	 DISPLAY_DDR	DDRD

#define	 ZERO       0x77 
#define	 ONE        0x41
#define	 TWO        0x3B
#define	 THREE      0x6B
#define	 FOUR       0x4D
#define	 FIVE       0x6E
#define	 SIX        0x7E
#define	 SEVEN      0x43
#define	 EIGHT      0x7F
#define	 NINE       0x6F
#define	 DOT        0x80

int main(void)
{
	DISPLAY_DDR=0xFF;
	DISPLAY_PORT=0x00;
	
	while(1)
	{	
		DISPLAY_PORT=ZERO;
		_delay_ms(1000);
	
		DISPLAY_PORT=ONE;
		_delay_ms(1000);
	
		DISPLAY_PORT=TWO;
		_delay_ms(1000);
	
		DISPLAY_PORT=THREE;
		_delay_ms(1000);
	
		DISPLAY_PORT=FOUR;
		_delay_ms(1000);
	
		DISPLAY_PORT=FIVE;
		_delay_ms(1000);
	
		DISPLAY_PORT=SIX;
		_delay_ms(1000);
	
		DISPLAY_PORT=SEVEN;
		_delay_ms(1000);
	
		DISPLAY_PORT=EIGHT;
		_delay_ms(1000);
	
		DISPLAY_PORT=NINE;
		_delay_ms(1000);
	
		DISPLAY_PORT=DOT;
		_delay_ms(1000);	
	}	
	return 0;
}