xermicus/gd32vf103

Sipeed Longan Nano

Hello world for a GD32VF103CBT6 RISC-V dev board.

Prerequisites

Rust

Recent nightly toolchain with the corresponding target:

rustup default nightly
rustup target add riscv32imac-unknown-none-elf

Dependencies

• RISC-V GNU toolchain
• dfu-utils Important use the latest git version, see this issue

Install GNU toolchain on arch linux:

pacman -S riscv32-elf-gdb riscv32-elf-binutils

How to build & flash

Inside this repo:

cargo xbuild && \
riscv32-elf-objcopy -O binary target/riscv32imac-unknown-none-elf/debug/gd32vf103 firmware.bin

Connect the board, while holding down then BOOT0 button shortly press the RESET button to enter dfu bootloader mode. Flash using dfu-util:

sudo dfu-util -a 0 -s 0x08000000:leave -D firmware.bin

Resources & starting points

• pcein/rust-sipeed-longan-nano Thank you!
• gd32v-rust/gd32vf103-example Thank you!
• Datasheet, CPU Manual