Klipper Configuration for the Fly-SB2040-V2 on CANbus

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Important: This guide assumes you have a working Klipper host installation on a Raspberry Pi or compatible device

Compile Klipper firmware for Fly-SB2040-V2

Tip: To read more about the KCONFIG_CONFIG option, see here

ssh to your klipper host console
cd to the klipper directory
```
cd ~/klipper
```

Run make clean

make clean KCONFIG_CONFIG=config.sb2040v2

Open menuconfig

make menuconfig KCONFIG_CONFIG=config.sb2040v2

Important: As of FlyOS v3.1, the default CAN speed is 1000000. These instructions have been updated to reflect that speed as default.
Your host system may be set up for a different default CAN speed. Use nano /etc/network/interfaces.d/can0 to check the speed

Set the following settings
- [*] Enable extra low-level configuration options
- Micro-controller Architecture (Raspberry Pi RP2040)
- Bootloader offset (16KiB bootloader)
- Communication interface (CAN bus)
- (4) CAN RX gpio number
- (5) CAN TX gpio number
- (1000000) CAN bus speed
- (gpio24) GPIO pins to set at micro-controller startup
  
  Klipper Menu Config CAN
Quit and save the configuration

Run Make to compile the firmware

make KCONFIG_CONFIG=config.sb2040v2 -j4

Flash Klipper CANbus firmware with Katapult over CANbus

Connect the Fly-SB2040-V2 to your power supply.
Install the 120ohm jumper if this is the only MCU on your CAN bus other than the CAN adapter used by the klipper host. See here for more information.

Get the Fly-SB2040-V2 UUID buy running the following script.
```
~/katapult/scripts/flash_can.py -i can0 -q
```
If CAN devices are detected the above command will return the following.
```
Detected uuid: 8248a4b16ede, Application: Katapult
```
Flash Can Query
Each device will have a unique uuid. In the above example, 8248a4b16ede is the micro-controller’s canbus uuid.
Save the UUID for the next step and for using in your printer.cfg file.

Flash the klipper firmware to the Fly-SB2040-V2 by running the following command.

python3 ~/katapult/scripts/flash_can.py -i can0 -f ~/klipper/out/klipper.bin -u {paste your UUID here}

Example

python3 ~/katapult/scripts/flash_can.py -i can0 -f ~/klipper/out/klipper.bin -u 8248a4b16ede

You should get a download progress bar and File downloaded successfuly when the burning is complete.

Burn Klipper firmware over CANbus
Your Fly-SB2040-V2 should now have klipper firmware installed and be ready to use.

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