USB Bridge CAN Firmware Compilation

Start Compilation

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

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

Standard Systems (Raspberry Pi official system, etc.)
Do not use root. Switch to a regular user:
```
su <username>
```
FLY Host Machine (FlyOS-FAST system)
Only supports logging in as the root user (password: mellow).

In the Klipper firmware configuration interface, only keyboard operations are supported; mouse usage is not possible.

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

Here, rm -rf ~/klipper/.config && rm -rf ~/klipper/out deletes previous compilation data and firmware
make menuconfig compiles the firmware. After execution, the following interface should appear
Here, rm -rf ~/klipper/.config && rm -rf ~/klipper/out deletes previous compilation data and firmware, and 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 the Enter key

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

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

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Select Bootloader offset and choose: 128KiB bootloader

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

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

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Press the Q key, and when Save configuration appears, press the Y key
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The configuration should now be saved, and you will have exited to the command line interface
Enter the following command to start compilation. This process may take some time.

make -j4

The compilation is successful if the following content is output at the end
Due to Klipper version differences, the appearance of out/klipper.bin indicates success
```
Linking out/klipper.elf
Creating bin file out/klipper.bin
```

Before starting to flash the firmware, please first Connect via SSH using network
Off-brand memory cards may cause flashing failures. Please try to use the recommended memory cards below for firmware updates.
Prepare a TF card with a capacity not exceeding 32G. It is recommended that the TF card's transfer speed must be class10 or higher. SanDisk and other reputable brands are recommended.

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

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Use the left file directory in MobaXterm_Personal to find klipper, then locate and open out.
- Regular System Firmware Download Directory
- FlyOS-FAST System Firmware Download Directory
Caution

Notes for Regular Systems

This applies to regular host systems like Raspberry Pi, FLY Pi, etc.

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 mainboard and insert the TF card.
Power on the mainboard and wait for 10 seconds.
Remove the TF card and insert it into the computer. If firmware.bin disappears from the SD card and FLY.CUR appears, the flashing was successful.

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