Qaxe

Qaxe is a quad-BM1366 Miner based on the PiAxe and BitAxe.

rev1: is tested and operating at about 1.7TH/s average speed.
rev2: working fine with the expected speed of ~1.8TH/s avg after some minor modifications (330µF caps are wrongly placed, see rev3)
rev3: Fixed Caps placement and added Boot-Switch. It should put the STM32 into DFU bootloader but not tested yet. rev3.1: Added pulldown on PB2 that is needed for booting the USB bootloader

ASICs

The QAxe uses 4 ASICs of type BM1366.

Installation via CMSIS-DAP Programmer

As programming/debug adapter the Picoprobe firmware running on a Raspi Pico works best:
https://github.com/rp-rs/rp2040-project-template/blob/main/debug_probes.md / https://github.com/raspberrypi/picoprobe/releases/tag/picoprobe-cmsis-v1.0.3

There also is a little board with only 3 parts that gives a nice low-cost solution to flash the Qaxe:
https://github.com/shufps/raspi-pico-dap

On rev3 there should be the option to boot the stm32 (by pressing the boot-button on reset) into DFU-Bootloader mode what makes flashing via USB and without CMSIS-DAP programmer possible.

Compiling and Flashing

Instructions for flashing using the CMSIS-DAP adapter:

# install curl
sudo apt install curl

# install rust
curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf | sh

# add to ~/.bash.rc (afterwards, opening a new terminal is needed)
echo 'source "$HOME/.cargo/env"' >> ~/.bashrc

# clone repository
git clone https://github.com/shufps/qaxe

# clone submodules
cd qaxe
git submodule init
git submodule update

# add rust target for rev2/3
rustup target add thumbv7m-none-eabi

# or add rust target for rev1
rustup target add thumbv6m-none-eabi

# build firmware for rev2
cd firmware/fw-rev2
# or
cd firmware/fw-rev3
./build.sh

# run firmware (this also flashes it to the stm32)
./run.sh

Installation via USB Bootloader on rev3

The STM32L151CC variant has an integrated DFU Bootloader that should be started when pressing the boot button during reset.

Afterwards it should be possible to flash the firmware without CMSIS-DAP:

# install cargo-binutils and llvm tools
cargo install cargo-binutils
rustup component add llvm-tools-preview

# create the firmware.bin
cargo objcopy --release --bin qaxe -- -O binary qaxe-rev3.bin

# install dfu-utils
sudo apt-get install dfu-util

now start the stm32 in DFU mode by pressing `boot` on the `rev3` board (only works with the STM32L151CC variant)

# after booting, list the devices
dfu-util --list

# flash the binary
dfu-util -a 0 -s 0x08000000:leave -D qaxe-rev2.bin

Mining Client

Stratum Mining Client:
https://github.com/shufps/piaxe-miner

Misc

If you like this project and want to support future work, feel free to donate to: bc1q29hp4fqtks2wzpmfwtpac64fnr8ujw2nvnra04

mustafatufan / qaxe