#include <Adafruit_BusIO_Register.h>

// Define which interface to use by setting the unused interface to NULL!

#define SPIDEVICE_CS 10
Adafruit_SPIDevice *spi_dev = NULL; // new Adafruit_SPIDevice(SPIDEVICE_CS);

#define I2C_ADDRESS 0x5D
Adafruit_I2CDevice *i2c_dev = new Adafruit_I2CDevice(I2C_ADDRESS);

void setup() {
  while (!Serial) { delay(10); }
  Serial.begin(115200);
  Serial.println("I2C or SPI device register test");

  if (spi_dev && !spi_dev->begin()) {
    Serial.println("Could not initialize SPI device");
  }

  if (i2c_dev) {
    if (i2c_dev->begin()) {
      Serial.print("Device found on I2C address 0x");
      Serial.println(i2c_dev->address(), HEX);
    } else {
      Serial.print("Did not find I2C device at 0x");
      Serial.println(i2c_dev->address(), HEX);
    }
  }

  Adafruit_BusIO_Register id_reg = Adafruit_BusIO_Register(i2c_dev, spi_dev, ADDRBIT8_HIGH_TOREAD, 0x0F);
  uint8_t id=0;
  id_reg.read(&id);
  Serial.print("ID register = 0x"); Serial.println(id, HEX);
}

void loop() {
  
}