arduino-atmega328p/doc/avr__macros_8h_source.html

#ifndef AVR_MACROS_H_

#define AVR_MACROS_H_


#pragma message ( "avr_macros.h included" )


#ifndef F_CPU

#define F_CPU     16000000UL

#endif


#define F_50Hz    50UL

#define F_100Hz   100UL

#define F_200Hz   200UL

#define F_500Hz   500UL

#define F_1kHz    1000UL

#define F_5kHz    5000UL

#define F_10kHz   10000UL

#define F_20kHz   20000UL

#define F_40kHz   40000UL

#define F_50kHz   50000UL

#define F_100kHz  100000UL

#define F_200kHz  200000UL

#define F_500kHz  500000UL

#define F_1000kHz 1000000UL

#define F_1Mhz    1000000UL

#define F_62500Hz 62500UL

#define F_7812Hz  7812UL

#define F_976Hz   976UL

#define F_244Hz   244UL

#define F_61Hz    61UL

#define ENABLE  0x01

#define DISABLE 0x00


#define BUSY    2

#define ERROR   1

#define OK      0


#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~(1<<bit))

#define sbi(sfr, bit) (_SFR_BYTE(sfr) |=  (1<<bit))


#define SETBIT(ADDRESS,BIT)   (ADDRESS |=  (1<<BIT))

#define CLEARBIT(ADDRESS,BIT) (ADDRESS &= ~(1<<BIT))

#define FLIPBIT(ADDRESS,BIT)  (ADDRESS ^=  (1<<BIT))

#define CHECKBIT(ADDRESS,BIT) (ADDRESS  &  (1<<BIT))


#endif /* AVR_MACROS_H_ */