#include "portselection.h"
#include "functions.h"
volatile char x,y,z,u;
volatile long t_delay;
void setup() {
  init_port();
}
/*char input_k(){
  volatile char *port_k_in = 0x106;
  return *port_k_in;
}*/
void loop() {
  x = input_k();
      while((x & (0xff)) == 0x00){
        x = input_k();
      }
      Serial.println("x");
      for(t_delay=0;t_delay<100000;t_delay++);
      y = input_k();
      while((y & (0xff)) == 0x00){
        y = input_k();
      }
      Serial.println("y");
      for(t_delay=0;t_delay<100000;t_delay++);
      z = input_k();
      while((z & (0xff)) == 0x00){
        z = input_k();
      }
      Serial.println("z");
      for(t_delay=0;t_delay<100000;t_delay++);
      u = input_k();
      while((u & (0xff)) == 0x00){
        u = input_k();
      }
      Serial.println("u");
      for(t_delay=0;t_delay<100000;t_delay++);
        if((x & 0x01)== 0x01){
          if((y & 0x02)== 0x02){
            if((z & 0x04)== 0x04){
              if((u & 0x08)== 0x08){
                output_f(0x10);
                for(t_delay=0;t_delay<1000000;t_delay++);
                output_f(0x00);
              }
              else {
                Serial.println("Wrong input");
              }
            }
            else {
              Serial.println("Wrong input");
            }
          }
          else {
            Serial.println("Wrong input");
          }
        }
        else {
          Serial.println("Wrong input");
        }
}