int transferData(int fd, SPI_conf* sc, uint8_t *tx, uint8_t *rx, size_t size)
{
	int ret;
	int loop;

	struct spi_ioc_transfer tr = {
		.tx_buf = (unsigned long)tx,
		.rx_buf = (unsigned long)rx,
		.len = size,
		.delay_usecs = sc->delay,
		.speed_hz = sc->speed,
		.bits_per_word = sc->bits,
	};

	ret = write(fd, SPI_IOC_MESSAGE(1), sizeof(uint8_t));
	if (ret < 1)
		pabort("\nCan't send SPI message");

	return 0;
}