/* The program decribes the concept of multipexing in Embedded System, meaning that only 1 pin
is used to control multiple devices (here A0 (PORTF pin 0) used to control two pins) */

void time_delay(volatile long);

int main(void)
{
  //Setup Diretion register
  volatile char *dir;
  // set the direction of PORTF to OUTPUT
  dir = (char *) 0x30;  // Address of DDRF
  *dir = 0xFF;  // makes all pins of PORTF as OUTPUT

  // set the direction of PORTK to OUTPUT
  dir = (char *) 0x107;   // Address of DDRK
  *dir = 0xFF;  // Makes all pins of PORTK as OUTPUT

  while (1)
  {
    // Setup OUTPUT Register
    volatile char *out;
      // setup output register of PORTK
    out = (char *) 0x108; // Address of PORTK OUTPUT Register
    *out = 0x02;
    // Setup output register of PORTF
    out = (char *) 0x31;  // Address of PORTF OUTPUT Register
    *out = 0x01;
    
      time_delay(1000000);
      // setup output register of PORTK
    out = (char *) 0x108; // Address of PORTK OUTPUT Register
    *out = 0x01;


    // Setup output register of PORTF
    out = (char *) 0x31;  // Address of PORTF OUTPUT Register
    *out = 0x01;
    time_delay(1000000);

  }


}

void time_delay(volatile long del)
{
  for (volatile long i = 0; i < del; i++);
}