// portA for row --> anode (top-0;bottom-7)
// portB for column --> cathode (right-0;left-7)


#include "ecen.h"
# define DELAY 2000000

void setup() {
    volatile char *dir_A=0x21 , *dir_B=0x24;
    *dir_A = 0xff, *dir_B = 0xff;
}

// Light up right-most top LED
/*void loop() {
  outA((0x01));
  outB(~(0x01));
}*/

// Light up left-most top LED
/*void loop() {
  outA((0x01));
  outB(~(0x80));
}*/

// Light up right-most bottom LED
/*void loop() {
  outA((0x80));
  outB(~(0x01));
}*/

// Light up left-most bottom LED
/*void loop() {
  outA((0x80));
  outB(~(0x80));
}*/

//Light up top most row all leds
/*void loop() {
  outA((0x01));
  outB((0x00));
}*/

// Display bottom most row all leds
/*void loop(){
  outA(0x80);
  outB(0x00);
}*/

// Display left most column all leds
/*void loop(){
  outA(0xff);
  outB(0x7f);
}*/

// Display right most column all leds
/*void loop(){
  outA(0xff);
  outB(0xfe);
}*/

// Display diagonal leds [top left - bottom right]
/*void loop(){
  volatile long k;
  for(int i=0;i<8;i++){
    outB(~(128>>i));
    outA(1<<i);
    for(k=0;k<3000;k++);
    outA(0x00);
    
      }
}*/

// Display diagonal leds [top right - bottom rigleftht]
void loop(){
  volatile long k;
  for(int i=0;i<8;i++){
    outB(~(1<<i));
    outA(1<<i);
    for(k=0;k<3000;k++);
    outA(0x00);
      }
}