USB Bridge CAN Firmware Flashing

SSH into the Host

Warning

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

• First, please: Connect to the host via WiFi SSH

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USB Bridge CAN Firmware Flashing

USB Bridge CAN Firmware Flashing

Tip

• The FLYOS-FAST system has a pre-compiled USB Bridge CAN firmware. There's no need to manually compile the firmware; you can flash it by executing the command below.
• Alternatively, you can choose Manually Compile USB Bridge CAN Firmware to compile the firmware yourself.

• The FAST system defaults to a 1M rate. If you need 500K, you need to modify the canbus_bitrate rate in the system configuration.

• This command flashes the 1M USB Bridge CAN Firmware.

fly-flash -d auto -h -f /usr/lib/firmware/klipper/stm32h723-128k-usbcan-1m.bin

• This command flashes the 500k USB Bridge CAN Firmware.

fly-flash -d auto -h -f /usr/lib/firmware/klipper/stm32h723-128k-usbcan-500k.bin

Manually Compile USB Bridge CAN Firmware

Manually Compile USB Bridge CAN Firmware

Klipper Firmware Compilation and Configuration Page Operation Instructions

tip

Please ensure that the keyboard input method is in half-width mode, i.e., English mode.

1. The up arrow key ↑, down arrow key ↓ are used to move the cursor up and down to select menu items.
2. The confirm key Enter or space key Space is used to check the menu or enter a sub-menu.
3. The exit key ESC is used to return to the previous menu.
4. The Q key is used to exit the Klipper firmware configuration page.
5. The Y key, when exiting the Klipper firmware configuration page and there is a prompt, click the Y key to save the configuration file.

warning

If there are fewer options in the configuration page, please first check [ ] Enable extra low-level configuration options to display some hidden options.

Below is the introduction on how to compile the firmware:

• After connecting to 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 is to delete previous compilation data and firmware, make menuconfig is to compile the firmware, after execution, the following interface should appear

  

• Select Enable extra low-level configuration options and press Enter

  

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

  

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

  

• Select Bootloader offset, select: 128KiB bootloader

  

• Select Clock Reference (8 MHz crystal), select: 25 MHz crystal

  

• Select Communication interface, select: USB to CAN bus bridge (USB on PA11/PA12)

  

• Press the Q key. When Save configuration appears, then press the Y key.

• The configuration should now be saved, and you will have exited to the command line interface.

• Enter the command below to start compiling. It will take some time.

make -j4

• If the final output shows the content below, the compilation was successful.

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Firmware Flashing

tip

Execute the command below to flash the firmware.

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

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Search for CAN ID

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

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

For fluidd: {…}, click into it to find printer.cfg

For mainsail: Machine, click into it to find printer.cfg

3. After clicking into printer.cfg, click on DEVICES in the upper right corner.

4. Click CAN, then refresh.

   Refresh in fluidd

   Refresh in mainsail

5. Copy the ID; click the arrow to copy it.

   In fluidd, confirm whether the item pointed to by the first arrow is Klipper; if so, click the arrow on the right to copy it.

   In mainsail, confirm whether the item pointed to by the first arrow is Klipper; if so, click the arrow on the right to copy it.

Fill in CAN ID

1. Close DEVICES and fill in the ID

Note

• Please change the following in the configuration file:

[mcu] 
serial: /tmp/klipper_host_mcu

to

[mcu host] 
serial: /tmp/klipper_host_mcu

• Add:

[mcu]
canbus_uuid: <Replace this with the ID you just looked up>

In fluidd, find [MCU]

In mainsail, find [MCU]

2. Fill the ID into the configuration

tip

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

3. If Klipper shows a message ADC out of range, this is normal. Connect the heated bed and thermistor to the mainboard, and configure the thermistor pins for the extruder and heated bed, then save and restart.

dangerous

Note: All IDs shown in the documentation are examples. Each mainboard has a different ID, so please fill in the actual ID you obtained.

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