USB Firmware Compilation

Check the DIP Switch

Important

For normal use, please set the DIP switch to the upward position.
When adjusting the DIP switch, ensure it is fully pushed upward, otherwise it may fail to connect to the lower computer!!!

SSH into the Upper Computer

Warning

Before compiling the firmware, you need to connect to the upper computer via SSH using Wi-Fi.

First, please: Connect to the upper computer via SSH using Wi-Fi

USB Firmware Flashing
Manually Compile USB Firmware

USB Firmware Flashing

Note

The FLYOS-FAST system comes with a pre-compiled USB firmware, so manual compilation is not required. You can flash the firmware by executing the command below.
Alternatively, you can choose to manually compile the USB firmware and compile it yourself.

Connect to the upper computer via SSH and enter the following command:

fly-flash -d auto -h -f /usr/lib/firmware/klipper/stm32h723-128k-usb.bin

Firmware Compilation Quick Guide

Notes

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.

Switching Users:

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).

Firmware Compilation Operation Guide

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

Below is an introduction on how to compile the firmware:

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

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

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

Loading...
Select Enable extra low-level configuration options and press the Enter key.

Loading...
Navigate to the Micro-controller Architecture menu, then select STMicroelectronics STM32 and press the Enter key.

Loading...
Go to the Processor model menu and select STM32H723, then press Enter.

Loading...
Select Bootloader offset and choose: 128KiB bootloader.

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

Loading...
For Communication interface, select: USB (on PA11/PA12).

Loading...

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

make -j4

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

Firmware Flashing

Tip

Execute the following command to flash the firmware.

fly-flash -d auto -h -f /data/klipper/out/klipper.bin

Searching for USB ID

Open your browser, enter the IP address of the host computer in the address bar. For example, if the host IP is 192.168.101.179, type it in and press Enter.

After accessing the host's WEB interface, find the following in the configuration options on the left sidebar:

For fluidd: Click on {…} to enter, then find printer.cfg.

For mainsail: Click on Machine to enter, then find printer.cfg.

Click on printer.cfg to enter, then click on DEVICES in the top right corner.

Click on SERIAL, then refresh.

Refresh in fluidd.

Refresh in mainsail.

Copy the ID. Click on the indicated arrow to copy.

In fluidd, ensure ttyACM exists and that Path by ID is present. This is the USB ID.

In mainsail, ensure ttyACM exists and that Path by ID is present. This is the USB ID.

Filling in the USB ID

Danger

The ID shown below is an example and CANNOT be used !!!!

serial: /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0

Close the DEVICES window and fill in the ID.

Important

In the configuration file, change:

[mcu] 
serial: /tmp/klipper_host_mcu

[mcu host] 
serial: /tmp/klipper_host_mcu

And add:

[mcu]
serial: <Replace this with the ID you just queried>

Find [MCU] in fluidd.

Find [MCU] in mainsail.

Fill the ID into the configuration.

Tip

After filling in the ID, click SAVE & RESTART in the top right corner.

If Klipper prompts ADC out of range, this is normal. Connect the heated bed and thermistor to the mainboard, configure the thermistor pins for the hotend and heated bed, then save and restart.

Danger

Note: All IDs appearing in this document are examples. The actual ID for each mainboard is different. Please fill in the ID you actually obtained.

Check the DIP Switch​

SSH into the Upper Computer​

USB Firmware Flashing​

Firmware Compilation Quick Guide​

Notes​

SSH Login and User Switching​

Switching Users:​

Firmware Compilation Operation Guide​

Firmware Flashing​

Searching for USB ID​

Filling in the USB ID​