twi.h

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#ifndef TWI_H_
#define TWI_H_
 
    #ifndef F_PER
        #define F_PER 10000000UL
    #endif
 
    #ifndef F_TWI
        #define F_TWI 100000UL
    #endif 
 
    #ifndef T_RISE
        #define T_RISE 1/(float)10000000.0
    #endif
 
    #ifndef TWI_BITRATE
        #define TWI_BITRATE (unsigned char)(((float)F_PER)/(float)((F_TWI<<1)) - 5UL - ((unsigned int)(F_PER * (T_RISE))>>1))
    #endif
 
    #ifndef TWI_ADDRESS
        #define TWI_ADDRESS 0x42
    #endif
 
    #ifndef TWI_BROADCAST
        #define TWI_BROADCAST 0x00
    #endif
 
    #ifndef TWI_TIMEOUT
        #define TWI_TIMEOUT TWI_TIMEOUT_DISABLED_gc
    #endif
    
    #ifndef TWI_PORTMUX
        #define TWI_PORTMUX PORTMUX_TWI0_ALT2_gc
    #endif
 
    #ifndef TWI_TWIE
        // #define TWI_TWIE
    #endif
 
    #include <avr/io.h>
 
    #ifndef TWI_TWIE
        #include <avr/interrupt.h>
    #endif
 
    #include "../../../common/defines/TWI_defines.h"
    #include "../../../common/enums/TWI_enums.h"
 
    unsigned char twi_init(void);
            void twi_disable(void);
    unsigned char twi_status(void);
 
    #ifndef TWI_TWIE
        TWI_Error twi_start(void);
            void twi_stop(void);
        TWI_Error twi_address(unsigned char address, TWI_Operation operation);
        TWI_Error twi_set(unsigned char data);
        TWI_Error twi_get(unsigned char *data, TWI_Acknowledge acknowledge);
    #endif
 
#endif /* TWI_H_ */