1 #include <util/delay.h>

     2 

     3 #define false       0

     4 #define true        1

     5 

     6 typedef volatile uint8_t ioport_t;

     7 

     8 static inline ioport_t tbi(ioport_t *port, int bit)

     9 {

    10     return *port & (1 << bit);

    11 }

    12 

    13 static inline void sbi(ioport_t *port, int bit)

    14 {

    15     *port |= (1 << bit);

    16 }

    17 

    18 static inline void cbi(ioport_t *port, int bit)

    19 {

    20     *port &= ~(1 << bit);

    21 }

    22 

    23 static inline void xbi(ioport_t *port, int bit)

    24 {

    25     *port ^= (1 << bit);

    26 }

    27 

    28 void delay_1s ()

    29 {

    30     // busyloop

    31     _delay_ms(1000);

    32 }