Bo^Dick

int main(void){  DDRB = 0xFF; // outport for monitoring result  DDRD = 0b00000111; // port connected to spi slave devices    PORTD |= 0b00000011;    uint32_t result=0; // buffer for result  uint8_t i; // counter variable  Delay(100000);    PORTD &= ~_BV(0); // pull pin 0 low (enable slave #1)  Delay(100);    while(1)  {    result = 0; // clear result buffer			for (i=0; i<19; i++)	{      PORTD |= _BV(2); // pull clock high	  	  Delay(100);      result |= ((PIND & _BV(3))!=0)<<18; // read data bit	  result >>= 1; // and shift right		  Delay(100);	  PORTD &= ~_BV(2); // pull clock low	  Delay(100);    }	PORTB = result>>12;	PORTD |= _BV(0); // slave disable	Delay(100);      PORTD &= ~_BV(0); // slave enable	Delay(100);  }  return 0;}