matrix.c

Interfacing AVR to LED, Tact switch+7-segment, Matrix Keypad, HD44780 Character LCD and LED dot matr

#include <mega32.h>
#include <delay.h>

unsigned char k;
unsigned char arr[8]={0x18, 0x3C, 0x66, 0x66, 0x7E, 0x66, 0x66, 0x00};
//unsigned char arr[8]={0x7E, 0x33, 0x33, 0x3E, 0x33, 0x33, 0x7E, 0x00};
//unsigned char arr[8]={0x1E, 0x33, 0x60, 0x60, 0x60, 0x33, 0x1E, 0x00};
                                         
void main(void)
{

PORTA=0xFF;
DDRA=0xFF;

PORTB=0xFF;
DDRB=0xFF;

while (1)
        {
                for(k=0;k<=7;k++)
                {
                        PORTA=arr[k];
                        PORTB&=~(1<<k);
                        delay_us(100);
                        PORTB=0xFF;
                }
        } 
}