//8x8 Dotmatrix scanning
void setup() {
// put your setup code here, to run once:
volatile char *dirf,*dirl;
volatile char *outf,*outl;
dirf=0x30;
dirl=0x10A;
outf=0x31;
outl=0x10B;
*dirf=0xFF;
*dirl=0xFF;
char row=0,col=0;
while(1)
{
for(row=0;row<8;row++)
{
*outl=~(1<<row);
for(col=0;col<8;col++)
{
*outf=1<<col;
delay(500);
}
}
}
}