se/SE/stuff/P5_Automation-library-dev/Adafruit_BusIO/Adafruit_SPIDevice.h

#include <SPI.h>

#ifndef Adafruit_SPIDevice_h
#define Adafruit_SPIDevice_h

// some modern SPI definitions don't have BitOrder enum
#if (defined(__AVR__) && !defined(ARDUINO_ARCH_MEGAAVR)) ||                    \
    defined(ESP8266) || defined(TEENSYDUINO) ||                                \
    defined(ARDUINO_ARCH_SPRESENSE) || defined(ARDUINO_attinyxy7) ||           \
    defined(ARDUINO_attinyxy6) || defined(ARDUINO_attinyxy4) ||                \
    defined(ARDUINO_attinyxy2)
typedef enum _BitOrder {
  SPI_BITORDER_MSBFIRST = MSBFIRST,
  SPI_BITORDER_LSBFIRST = LSBFIRST,
} BitOrder;

#elif defined(ESP32)

// some modern SPI definitions don't have BitOrder enum and have different SPI
// mode defines
typedef enum _BitOrder {
  SPI_BITORDER_MSBFIRST = SPI_MSBFIRST,
  SPI_BITORDER_LSBFIRST = SPI_LSBFIRST,
} BitOrder;

#else
// Some platforms have a BitOrder enum but its named MSBFIRST/LSBFIRST
#define SPI_BITORDER_MSBFIRST MSBFIRST
#define SPI_BITORDER_LSBFIRST LSBFIRST
#endif

/**! The class which defines how we will talk to this device over SPI **/
class Adafruit_SPIDevice {
public:
  Adafruit_SPIDevice(int8_t cspin, uint32_t freq = 1000000,
                     BitOrder dataOrder = SPI_BITORDER_MSBFIRST,
                     uint8_t dataMode = SPI_MODE0, SPIClass *theSPI = &SPI);

  Adafruit_SPIDevice(int8_t cspin, int8_t sck, int8_t miso, int8_t mosi,
                     uint32_t freq = 1000000,
                     BitOrder dataOrder = SPI_BITORDER_MSBFIRST,
                     uint8_t dataMode = SPI_MODE0);

  bool begin(void);
  bool read(uint8_t *buffer, size_t len, uint8_t sendvalue = 0xFF);
  bool write(uint8_t *buffer, size_t len, uint8_t *prefix_buffer = NULL,
             size_t prefix_len = 0);
  bool write_then_read(uint8_t *write_buffer, size_t write_len,
                       uint8_t *read_buffer, size_t read_len,
                       uint8_t sendvalue = 0xFF);

  uint8_t transfer(uint8_t send);
  void transfer(uint8_t *buffer, size_t len);

private:
  SPIClass *_spi;
  SPISettings *_spiSetting;
  uint32_t _freq;
  BitOrder _dataOrder;
  uint8_t _dataMode;

  int8_t _cs, _sck, _mosi, _miso;
  bool _begun;
};

#endif // Adafruit_SPIDevice_h