Fly Gemini V2 CAN hat
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Fly Gemini V2 CAN hat
Overview
The Fly Can Hat board was made to perform the same functions as the UTOC board, allowing the Fly-Pi/Fly-Gemini V1.1/V2.0 to directly connect to CAN bus boards for Can communication.
- Compatilbe Boards
Dimensions
Top and Bottom View
Installation
- Just below the CAN hat header is a set of 8 DIP switches.
- Set switches 1,2,5 and 6 to the ON position when using the CAN Hat to connect the SBC to the STM32F405 over the internal CAN connection.
Fly-Gemini V2 DIP Switches set for internal CAN bus link to the STM32F405 MCU - On Gemini align the Red pin header on the Can Hat with the red socket on the main board. The black pin header should align to the black socket.
Warning: Inserting the CAN Hat backwards can short board components causing damage.
Klipper Host CAN0 file configuration
The Fly OS operating system ships with a CAN0 file pre configured. You only need to edit the file if you want to use a bus speed other than 5000000.
Important: This guide assumes you have a working Klipper host installation on a Fly Gemini, Fly Pi, Raspberry Pi or compatible device
- SSH to your Klipper host and create a new can0 file in the /ect/network/interfaces.d folder
sudo nano /etc/network/interfaces.d/can0
- Enter the following information.
allow-hotplug can0
iface can0 can static
bitrate 500000
up ifconfig $IFACE txqueuelen 1024
pre-up ip link set can0 type can bitrate 500000
pre-up ip link set can0 txqueuelen 1024
Note: Use the same bitrate you use on your can tool boards. This can be 250000, 500000 or 1000000. Bitrates of 500000 and 1000000 are prefered.
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enter Ctrl+X to save the can0 file
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Reboot your klipper host.
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This should be all you need to do if you are using a Fly UTOC-1, UTOC-3 or Mellow CANhat for the Gemini and Fly Pi. Other CAN bus adapters may need aditional configuration steps.