U23 2007/Evil Solutions/neu.c

1. include <avr/io.h>

void delay(uint8_t); int main(void){

/* * Pin 1: Clock * Pin 2: Shift / Load * Pin 3: Data */ DDRA = 0xFB; DDRC = 0xFF; PORTA = 0xFB;

uint8_t aussen; uint8_t wert;

while(1) { wert = 0x00; PORTA = 0x00; delay(1); PORTA = 0x02; delay(1);

if (PORTA & ~(0xFB)){ // DATA ist gesetzt wert++; } wert <<= 1;

for (aussen = 0; aussen < 3 ; aussen++) { PORTA = 0x03; delay(1); if (PORTA & ~(0xFB)){ // DATA ist gesetzt wert++; } wert <<= 1; PORTA = 0x02; delay(1); }

PORTC = wert;

}

return 0; }

/*

* 01 , 02, 04, 08
*/

void delay(uint8_t adelay){

uint16_t a; uint16_t b;

for (a=0; a < adelay; a++) for (b=0; b < 0xFF; b++){ PORTB = 0x00; /*nix*/ } }