elif board_id == ap_board.JETSON_XAVIER:
from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
from adafruit_blinka.microcontroller.tegra.t194.pin import Pin
+ elif detector.board.SIFIVE_UNLEASHED:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.hfu540.pin import Pin
elif board_id == ap_board.PINE64:
from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
from adafruit_blinka.microcontroller.allwinner.a64.pin import Pin