SPI.h

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#ifndef __SPI_H__
#define __SPI_H__

#ifdef SUPPORT_SPI

#include "udrv_spimst.h"
#include "Arduino.h"

#define SPI_HAS_TRANSACTION 1

#define SPI_MODE0 0x00
#define SPI_MODE1 0x01
#define SPI_MODE2 0x02
#define SPI_MODE3 0x03

#define SPI_CLOCK_DIV2   2
#define SPI_CLOCK_DIV4   4
#define SPI_CLOCK_DIV8   8
#define SPI_CLOCK_DIV16  16
#define SPI_CLOCK_DIV32  32
#define SPI_CLOCK_DIV64  64
#define SPI_CLOCK_DIV128 128
#define SPI_CLOCK_DIV256 256
#define SPI_CLOCK_DIV512 512

class SPISettings
{
    private:
    uint32_t clockFreq;
    uint8_t dataMode;
    uint8_t bitOrder;   
    friend class SPIClass;

    public:
    SPISettings(uint32_t clock, BitOrder bitOrder, uint8_t dataMode) {
        this->clockFreq = clock;
        this->bitOrder =  bitOrder;
        this->dataMode = dataMode;
    }

    SPISettings() {
        this->clockFreq = 4000000;
        this->bitOrder = MSBFIRST;
        this->dataMode = SPI_MODE0;
    }

};

class SPIClass 
{
    private:
    udrv_spimst_port port;
    bool isInitialized;
    uint8_t bitOrder;

    public:
    SPIClass(udrv_spimst_port port);

    uint8_t transfer(uint8_t data);
    void transfer(const void *tx_buf, void *rx_buf, size_t count);
        
    void begin();

    void end();

    uint16_t transfer16(uint16_t data);

    void transfer(void *buf, size_t count);

    void beginTransaction(SPISettings settings);

    void endTransaction();

    void setBitOrder(BitOrder order);

    void setDataMode(uint8_t mode);

    void setClockDivider(uint32_t uc_div);

    void usingInterrupt();

};

extern SPIClass SPI;

#endif //end SPI.h

#endif