USB Bridge CAN Firmware Compilation

Start Compilation

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.

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

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)

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

Key	Function
↑ / ↓	Move cursor up/down to select menu items
Enter / Space	Confirm selection, check options, or enter submenus
ESC	Return to the previous menu
Q	Exit the configuration interface
Y	If prompted when exiting, press Y to save the configuration

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

Where rm -rf ~/klipper/.config && rm -rf ~/klipper/out removes the previous compilation data and firmware
make menuconfig compiles the firmware; after execution, the interface shown below should appear
Where rm -rf ~/klipper/.config && rm -rf ~/klipper/out removes the previous compilation data and firmware, make menuconfig compiles the firmware; after execution, the interface shown below should appear

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Select Enable extra low-level configuration options, press the Enter key

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

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Enter the menu Processor model, select STM32H723, press the Enter key

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Select Bootloader offset, choose: 128KiB bootloader

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Select Clock Reference (8 MHz crystal), choose: 25 MHz crystal

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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, then 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 the compilation; it will take a while

make -j4

Finally, the following output indicates a successful compilation
Due to different Klipper versions, the appearance of out/klipper.bin alone signifies success
```
Linking out/klipper.elf
Creating bin file out/klipper.bin
```

Before starting to burn the firmware, please first connect via SSH using the network
Off-brand memory cards may cause burning failures. Please try to use the recommended memory cards below to update the firmware.
You need to prepare a TF card with a capacity not exceeding 32G, and it is recommended that the transfer speed of the TF card must be class10 or above. It is recommended to use TF cards from brands such as SanDisk.

Use the previously prepared TF card.
Format it using SDFormatter.

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Use MobaXterm_Personal to find the klipper directory in the file list on the left, then select it, find and open the out folder.
- Firmware Download Directory for Standard Systems
- Firmware Download Directory for FlyOS-FAST System
Caution

Notes for standard systems

This applies to standard host systems such as Raspberry Pi and FLY Pi.

The compiled firmware is located in the /home/<your host username>/klipper/out/ directory.

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Caution

Notes for FlyOS-FAST system

Firmware directory for FAST system.

The compiled firmware is located in the /data/klipper/out/ directory.

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Download klipper.bin to the TF card and rename it to firmware.bin.
```
firmware.bin
```
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Power off the motherboard and insert the TF card into the motherboard.
Power on the motherboard and wait for 10 seconds.
Remove the TF card and insert it into the computer. If the firmware.bin file on the SD card disappears and a file named FLY.CUR appears, the burning is successful.

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