#define PORTB_BASE_ADDR 0x23
#define PORTC_BASE_ADDR 0x26
#define PORTD_BASE_ADDR 0x29
struct port
{
  uint8_t PINx;
  uint8_t DDRx;
  uint8_t PORTx;
};
//int var;
//int *ptr = &var;

//struct port s1;
struct port *gpiob = (struct port *)PORTB_BASE_ADDR;
struct port *gpioc = (struct port *)PORTC_BASE_ADDR;
struct port *gpiod = (struct port *)PORTD_BASE_ADDR;

void setup() {
  // put your setup code here, to run once:
   //var = 5;
  // *ptr = 5;
  // struct PORT *sptr;
 // s1.PINx = 5;//dot variables
  gpiob -> DDRx |= (1<<5);
 // gpiob -> DDRBx = 5;
 // gpiob -> PORTx = 5;
}

void loop() {
  // put your main code here, to run repeatedly:
  gpiob -> PORTx |= (1<<0);
    delay(1000);
   gpiob -> PORTx |= (1<<1);
    delay(1000);
   gpiob -> PORTx |= (1<<2);
    delay(1000);
   gpiob -> PORTx |= (1<<3);
    //*((volatile uint8_t *)0x24) |= (1<<5);
  delay(1000);
  gpiob -> PORTx &= ~(1<<0);
    delay(1000);
  gpiob -> PORTx &= ~(1<<1);
    delay(1000);
  gpiob -> PORTx &= ~(1<<2);
    delay(1000);
  gpiob -> PORTx &= ~(1<<3);
    //*((volatile uint8_t *)0x24) &= ~(1<<5);
  delay(1000);
}