SiFive HiFive Unleashed


The HiFive Unleashed is a development board with a SiFive FU540-C000 multi-core 64bit RISC-V SoC.

SiFive HiFive Unleashed board

Programming and debugging


Applications for the hifive_unleashed board configuration can be built as usual (see Building an Application) using the corresponding board name:

west build -b hifive_unleashed


Current version has not yet supported flashing binary to onboard Flash ROM.

This board has USB-JTAG interface and this can be used with OpenOCD. Load applications on DDR and run as follows:

openocd -c 'bindto' \
        -f boards/riscv/hifive_unleashed/support/openocd_hifive_unleashed.cfg
riscv64-zephyr-elf-gdb build/zephyr/zephyr.elf
(gdb) target remote :3333
(gdb) c


Refer to the detailed overview about Application Debugging.