USB Firmware Compilation

Check DIP Switch

Important Notes

• During normal use, please flip the DIP switch upward
• When flipping, make sure to push it all the way up, otherwise the connection to the lower computer may fail!!!

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SSH Connect to the Upper Computer

Warning

• Before firmware compilation, you need to connect to the upper computer via WiFi SSH

• First, please: Connect to the Upper Computer via WiFi SSH

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• USB Firmware Flashing
• Manually Compile USB Firmware

USB Firmware Flashing

Tip

• The FLYOS-FAST system comes with a pre-compiled USB firmware, no need to manually compile it. Execute the command below to flash.
• You can also choose to manually compile the USB firmware by yourself.

• Enter the following command via SSH connection to the upper computer:

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

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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.

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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)

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Firmware Compilation Operation Guide

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

Starting Firmware Compilation

Below is an introduction on how to compile the firmware:

1. Connect 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 is used to clear previous compilation configurations and firmware; make menuconfig is used to open the Klipper firmware configuration interface.

2. Follow the order below to set each item one by one, completing each before moving on to the next.

   1启用 Enable extra low-level configuration options

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   2Micro-controller Architecture 选择 STMicroelectronics STM32

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   3Processor model 选择 STM32H723

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   4Bootloader offset 选择 128KiB bootloader

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   5Clock Reference 选择 25 MHz crystal

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   6Communication interface 选择 USB (on PA11/PA12)

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   7USB ids 保持默认，无需进入

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   8GPIO pins to set at micro-controller startup 保持为空

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   9GPIO state at micro-controller startup 选择 Not set

   此项是 FLYOS-Klipper 功能。通常保持 Not set；如需设置全部 GPIO 的启动状态，请先阅读 GPIO 启动状态使用说明。

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   10按 Q 键退出配置界面

   (Top)

   Klipper Firmware Configuration

   [*] Enable extra low-level configuration options

   Micro-controller Architecture (STMicroelectronics STM32) --->

   Processor model (STM32H723) --->

   Bootloader offset (128KiB bootloader) --->

   Clock Reference (25 MHz crystal) --->

   Communication interface (USB (on PA11/PA12)) --->

   USB ids --->

   () GPIO pins to set at micro-controller startup

   GPIO state at micro-controller startup (Not set) --->

   [Space/Enter] Toggle/enter[?] Help[/] Search

   [Q] Quit (prompts for save)[Esc] Leave menu

   11出现 Save configuration 时按 Y 保存配置

   Quit

   Save configuration?

   (Y)es(N)o(C)ancel

3. After completing the last two steps above, press Q to exit the configuration interface, then press Y to save the configuration.

4. Return to the command line and enter the following command, then press Enter to start compiling:

   make -j4

   root@flyos-11e5f8 ~/klipper # make -j4

   Compiling out/src/stm32/stm32h7_adc.o

   Compiling out/src/stm32/stm32h7_spi.o

   Compiling out/src/stm32/stm32f0_i2c.o

   Compiling out/src/stm32/usbotg.o

   Compiling out/src/stm32/chipid.o

   Compiling out/src/generic/usb_cdc.o

   Compiling out/src/stm32/hard_pwm.o

   Preprocessing out/src/generic/armcm_link.ld

   Building out/compile_time_request.o

   Version: XXXX

   Linking out/klipper.elf

   Creating bin file out/klipper.bin

   终端末尾出现 Linking out/klipper.elf 和 Creating bin file out/klipper.bin，即表示编译成功。 实际编译时，部分 Compiling 行和 Version 会随 Klipper 与系统版本变化。

Firmware Flashing

Tip

Execute the following command to flash the firmware

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

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HID Flashing Failure Prompt

If the prompt shown in the image below appears, please follow the steps below to troubleshoot:

1. Confirm that the DIP switch is in the correct position
2. If the DIP switch is correct but flashing still fails, please refer to BL Firmware Flashing

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Searching for USB ID

1. Open a browser, enter the IP address of the host computer in the address bar. For example, if my host computer IP is 192.168.101.179, directly input it and press Enter.

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2. Open the WEB interface of the host computer, and find the following in the configuration options of the left sidebar:

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

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

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

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4. Click SERIAL, then refresh.

Refresh in fluidd Loading...

Refresh in mainsail Loading...

5. Copy the ID, click on the arrow indicated to copy.

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

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

Filling in the USB ID

Danger

Please note that the ID below CANNOT be used!!!!

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

1. Close DEVICES and fill in the ID.

Note

• In the configuration file, change:

[mcu] 
serial: /tmp/klipper_host_mcu

• to:

[mcu host] 
serial: /tmp/klipper_host_mcu

• And add:

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

Find [MCU] in fluidd Loading...

Find [MCU] in mainsail Loading...

2. Fill in the ID into the configuration.

Tip

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

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

Danger

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