USB Firmware Compilation

SSH Connection to the Host

Warning

Before firmware compilation, you need to connect to the host via WiFi SSH.

First, please: Use WiFi to Connect to Host SSH

USB Firmware Flashing
Manual USB Firmware Compilation

USB Firmware Flashing

Tip

A USB firmware has been pre-compiled in the FLYOS-FAST system, so there is no need to manually compile the firmware. You can flash it by executing the command below.
Alternatively, you can choose Manual USB Firmware Compilation to compile the firmware yourself.

Connect to the host via SSH and enter the following command:

fly-flash -d auto -h -f /usr/lib/firmware/klipper/stm32f407-32k-usb.bin

Firmware Compilation Quick Guide

Important Notes

Network: Ensure the host machine (Raspberry Pi, etc.) is connected to the network.
Login Method: Must log in via SSH over the network; serial port login is disabled.
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 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	When exiting, press Y to save configuration if prompted

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

Among these, rm -rf ~/klipper/.config && rm -rf ~/klipper/out deletes previous compilation data and firmware.
make menuconfig is for compiling the firmware. After execution, the following interface should appear:

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

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

Loading...
Navigate to the Processor model menu, select STM32F407, and press Enter.

Loading...
Select Bootloader offset, and choose: 32KiB bootloader.

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 exit back to the command line interface.
Enter the following command to start compilation. This will take some time.

make -j4

If the following content is output at the end, the compilation is successful.
Due to Klipper version differences, as long as out/klipper.bin appears, it 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 my host IP is 192.168.101.179, type it directly and press Enter.

Open the host's WEB interface, find the configuration option in the left sidebar:

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

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

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

Click SERIAL, then refresh.

Refreshing in fluidd

Refreshing in mainsail

Copy the ID. Click where the arrow points to copy.

In fluidd, check if ttyAMC exists and ensure the Path by ID exists. This is the USB ID.

In mainsail, check if ttyAMC exists and ensure the Path by ID exists. This is the USB ID.

Filling in the USB ID

dangerous

Please note: The ID below CANNOT be used!!!!

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

Close DEVICES and fill in the ID.

Important Note

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.

dangerous

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.

SSH Connection to the Host​

USB Firmware Flashing​

Firmware Compilation Quick Guide​

Important Notes​

SSH Login and User Switching​

Switching Users:​

Firmware Compilation Operation Guide​

Start Firmware Compilation​

Firmware Flashing​

Searching for USB ID​

Filling in the USB ID​