Computertechnik mit Mikrocontrollern

KAPITEL 13. AUFBAU DES SYSTEMS 164
void wait ()
{
// unsigned char cnt1,cnt2,cnt3; // does not work with -O2 and -O3
// volatile unsigned char cnt1,cnt2,cnt3;
register cnt1,cnt2,cnt3;
for (cnt1=100;cnt1;cnt1--)
for (cnt2=100;cnt2;cnt2--)
for (cnt3=100;cnt3;cnt3--);
}
#define led_DDR DDRB // LED
#define led_PORT PORTB
#define led_PIN PINB
#define led_PB PB5
main()
{
led_DDR |= 1