1 #ifndef QMSK_PORT_H

     2 #define QMSK_PORT_H

     3 

     4 #include <avr/io.h>

     5 

     6 typedef volatile uint8_t ioport_t;

     7 

     8 static inline ioport_t tbi(ioport_t *port, uint8_t bit)

     9 {

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

    11 }

    12 

    13 static inline void sbi(ioport_t *port, uint8_t bit)

    14 {

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

    16 }

    17 

    18 static inline void cbi(ioport_t *port, uint8_t bit)

    19 {

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

    21 }

    22 

    23 static inline void xbi(ioport_t *port, uint8_t bit)

    24 {

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

    26 }

    27 #endif