terom@49: #define false       0
terom@49: #define true        1
terom@49: 
terom@58: typedef uint8_t byte;
terom@58: 
terom@49: typedef volatile uint8_t ioport_t;
terom@49: 
terom@49: static inline ioport_t tbi(ioport_t *port, int bit)
terom@49: {
terom@49:     return *port & (1 << bit);
terom@49: }
terom@49: 
terom@49: static inline void sbi(ioport_t *port, int bit)
terom@49: {
terom@49:     *port |= (1 << bit);
terom@49: }
terom@49: 
terom@49: static inline void cbi(ioport_t *port, int bit)
terom@49: {
terom@49:     *port &= ~(1 << bit);
terom@49: }
terom@49: 
terom@49: static inline void xbi(ioport_t *port, int bit)
terom@49: {
terom@49:     *port ^= (1 << bit);
terom@49: }