Head Board Bootloader

The head board is a BTT EBB36 This operates over the CAN bus via a USB to CAN adapter

• https://gist.github.com/jfryman/0c3827079e23d7bc55f9677d2c6b8bec
• https://github.com/bigtreetech/EBB
• STM32G0B1CBT6 64MHz

Checks

To check the CAN port is up and running

ifconfig can0

To check the existing katapult device is reachable over the CAN bus

python3 ~/katapult/scripts/flash_can.py -i can0 -q

Katapult boot loader

Originally these board used to use some software called CanBoot to act as a firmware loader this has now been renamed to Katapult

• https://github.com/Arksine/katapult

Strictly speaking normally we shouldn't need to update this that often

To Build

cd ~
git clone https://github.com/Arksine/katapult
cd katapult
make menuconfig
make clean
make

The configuration options are

• MCU: STM32
• Model: STM32G0B1
• Build Katapult deployment application: 8KiB bootloader
• Clock Reference: 8 MHz crystal
• Communication interface: CAN bus (on PB0/PB1)
• Enable Status LED: check
• Status LED GPIO Pin: PA13

TODO I've not actually updated this on the board we have as it's a hassle to get it into DFU mode with the switches also the existing bootloader seems ok