spi.h

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#ifndef SPI_H_
#define SPI_H_
 
    #ifndef SPI2X_ENABLE
        //#define SPI2X_ENABLE
 
        #ifdef _DOXYGEN_    // Used for documentation, can be ignored
            #define SPI2X_ENABLE
        #endif
    #endif
 
    #ifndef SPI_CLOCK
        #define SPI_CLOCK SPI_PRESC_DIV4_gc
    #endif
 
    #ifndef SPI_PORTMUX
        #define SPI_PORTMUX PORTMUX_SPI0_DEFAULT_gc
 
        #ifdef _DOXYGEN_    // Used for documentation, can be ignored
            #define SPI_PORTMUX PORTMUX_SPI0_DEFAULT_gc
        #endif
    #endif
 
    #ifndef SPI_PORT
        #define SPI_PORT PORTA
    #endif
 
    #ifndef SPI_MOSI
        #define SPI_MOSI PIN1_bm
    #endif
    
    #ifndef SPI_MISO
        #define SPI_MISO SET_PIN(2, _bm)
 
        #ifndef SPI_MISO_PINCTRL
            #define SPI_MISO_PINCTRL SET_PIN(2, CTRL)
        #endif
    #endif
 
    #ifndef SPI_SCK
        #define SPI_SCK PIN3_bm
    #endif
 
    #ifndef SPI_SS
        #define SPI_SS SET_PIN(4, _bm)
 
        #ifndef SPI_ENABLE_MASTER_ABORT
            #define SPI_ENABLE_MASTER_ABORT
 
            #ifndef SPI_SS_PINCTRL
                #define SPI_SS_PINCTRL SET_PIN(4, CTRL)
            #endif
        #endif
    #endif
 
    #ifndef SPI_SPIE
        // #define SPI_SPIE
    #endif
 
    #include <avr/io.h>
    #include "../../../common/enums/SPI_enums.h"
    #include "../../../common/macros/PORT_macros.h"
 
    SPI_Status spi_init(SPI_Direction direction, SPI_Polarity setup, SPI_Phase sample);
    void spi_disable(void);
    void spi_select(SPI_Select mode);
 
    #ifndef SPI_SPIE
        unsigned char spi_transfer(unsigned char data);
    #endif
 
#endif /* SPI_H_ */