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USB Bridge CAN Firmware Compilation

Start Compilation​

Brief Guide to Firmware Compilation​

Notes​

  • Network: Ensure the host (Raspberry Pi, etc.) is connected to the internet.
  • Login Method: Must log in via SSH over the network; serial port access is disabled.
  • Input Method: Keep the keyboard in English half-width mode.

SSH Login and User Switching​

Use tools like MobaXterm, PuTTY, etc., to SSH into the host.

Switch User:​

  • Standard System (Official Raspberry Pi system, etc.)
    Do not use root; switch to a regular user: 
    su <username>
  • FLY Host System (FlyOS-FAST system)
    Only supports login as root user (password: mellow)

Firmware Compilation Operation Guide​

In the Klipper firmware configuration interface, only keyboard operations are supported; the mouse cannot be used.

KeyFunction
↑ / ↓Move cursor up/down to select menu items
Enter / SpaceConfirm selection, check options, or enter submenus
ESCReturn to the previous menu
QExit the configuration interface
YIf prompted when exiting, press Y to save the configuration

Start Firmware Compilation​

The following describes how to compile the firmware:

  • After connecting via SSH, enter the following command and press Enter:

    cd ~/klipper && rm -rf ~/klipper/.config && rm -rf ~/klipper/out && make menuconfig

  • rm -rf ~/klipper/.config && rm -rf ~/klipper/out removes previous compilation data and firmware

  • make menuconfig compiles the firmware, after execution the following interface should appear

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  • Select Enable extra low-level configuration options and press Enter

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  • Enter the Micro-controller Architecture menu, then select STMicroelectronics STM32 and press Enter

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  • Enter the Processor model menu, select STM32F407 and press Enter

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  • Select Bootloader offset, choose: 32KiB bootloader

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  • Select Communication interface, choose: USB to CAN bus bridge (USB on PA11/PA12)

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  • Press the Q key, when Save configuration appears, press the Y key
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  • The configuration should now be saved and you should return to the command line interface
  • Enter the following command to start compilation, it will take some time
make -j4
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  • The following output at the end indicates successful compilation
  • Due to Klipper version issues, as long as out/klipper.bin appears, it indicates success 
    Linking out/klipper.elf
    Creating bin file out/klipper.bin

Flashing Firmware​

Preparation​

  • Before starting to flash the firmware, please connect via SSH over the network
  • Off-brand memory cards may cause flashing to fail. Please use the recommended memory cards below to update the firmware
  • You need to prepare a TF card with a capacity not exceeding 32G. It is recommended that the transfer speed of the TF card be Class 10 or above. It is recommended to use TF cards from brands such as SanDisk

Download Firmware​

  1. Use the previously prepared TF card

  2. Format using SDFormatter

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  3. Use MobaXterm_Personal, find the klipper folder in the left file directory, select it, then find out and open it

    Caution
    • Notes for Ordinary Systems
      • This applies to ordinary host computer systems such as Raspberry Pi, FLY Pi, etc.
      • The compiled firmware is located in the /home/<your host computer username>/klipper/out/ directory
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  4. Download klipper.bin to the TF card, and rename it to firmware.bin

    firmware.bin
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Windows File Extension Display

Windows may hide file extensions by default, which can easily result in the file being saved as firmware.bin.txt or firmware.bin.bin. Before renaming the firmware, enable extension display in File Explorer:

  1. Open any folder.
  2. Click on View at the top.
  3. Check the File name extensions box.
  4. When renaming the file, make sure the complete file name is firmware.bin.
  1. Power off the motherboard, insert the TF card into the motherboard
  2. Power on the motherboard, wait for 10 seconds
  3. Remove the TF card, insert it into the computer. If firmware.bin in the SD card has disappeared and FLY.CUR appears, the flashing is successful
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Searching for CAN ID After Flashing​

After the firmware is flashed and the motherboard is powered on again, please proceed to search for the CAN ID.

View CAN ID Retrieval Method

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