#define F_CPU 1000000L
#include <avr/io.h>



//assembly routines
//sreg.s
extern void hc595_byte(uint8_t byte);
extern void hc595_init();
extern void main_loop();
int main(){
  DDRD = 0xFF;
  
  hc595_init();
  hc595_byte(0x55);
  main_loop();
  while(1);
}