app.c

AVR Devolpment Board

#include "avr/io.h"
#include "util/delay.h"
#include "avr/pgmspace.h"
#include "avr/interrupt.h"

const prog_char SegCode[16]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; 
unsigned char DisBuffer[8];

volatile unsigned int Count=0;

void delay_ms(unsigned int ms)
{
	while(ms--)
		_delay_ms(1);
}

void Scanf(void)
{
	unsigned char i=0;
	for(i=0;i<8;i++)
	{
		PORTB = pgm_read_byte(&SegCode[DisBuffer[i]]);
		PORTA&=~(1<<PA4);
		PORTA|= (1<<PA4);
			
				
		PORTB = (1<<i);
		PORTA&=~(1<<PA5);
		PORTA|= (1<<PA5);
		

		_delay_ms(2);
	}
}

void IntInit(void)
{
	PORTD|= (1<<PD2)|(1<<PD3);
	DDRD &=~((1<<PD2)|(1<<PD3));
	MCUCR|= (1<<ISC11)|(0<<ISC10)|(1<<ISC01)|(0<<ISC00);
	GICR |= (1<<INT1)|(1<<INT0);
	sei();
}

int main(void)
{

	/* Set LED and Smg LE pin as output , databus as output */
	DDRA |=(1<<PA4)|(1<<PA5)|(1<<PA6); 
	DDRB  = 0xFF;

	/* Off the LED display */
	PORTB = 0xFF;
	PORTA|= (1<<PA6);	
	PORTA&=~(1<<PA6);

	IntInit();
	while(1)
	{
		DisBuffer[0]=0;
		DisBuffer[1]=0;
		DisBuffer[2]=0;
		DisBuffer[3]=Count/10000%10;
		DisBuffer[4]=Count/1000%10;
		DisBuffer[5]=Count/100%10;
		DisBuffer[6]=Count/10%10;
		DisBuffer[7]=Count/1%10;
		
		Scanf();
	}
	return 0;
}

SIGNAL(INT0_vect)
{
	GIFR&=~(1<<INT0);
	if(!(PIND&(1<<PD2)))
	{
		Count++;
	}
}

SIGNAL(INT1_vect)
{
	GIFR&=~(1<<INT1);
	if(!(PIND&(1<<PD3)))
	{
		Count--;
	}
}