Function spi_transfer_array

Software/C/GoPiGo3.h:67–77

Transfer length number of bytes. Write from outArray, read to inArray.

// Transfer length number of bytes. Write from outArray, read to inArray.
int spi_transfer_array(uint8_t length, uint8_t *outArray, uint8_t *inArray){
  spi_xfer_struct.len = length;
  spi_xfer_struct.tx_buf = (unsigned long)outArray;
  spi_xfer_struct.rx_buf = (unsigned long)inArray;

  if (ioctl(spi_file_handle, SPI_IOC_MESSAGE(1), &spi_xfer_struct) < 0) {
    return ERROR_SPI_FILE;
  }

  return ERROR_NONE;
}

// Function to call if an error occured that can not be resolved, such as failure to set up SPI
void fatal_error(const char *error){