USB Bridge CAN Firmware Flashing

SSH into the Host Computer

Warning

• Before compiling the firmware, use wifi to connect to the host computer SSH

• First please: Use wifi to connect to the host computer SSH

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USB Bridge CAN Firmware Flashing

USB Bridge CAN Firmware Flashing

Tip

• A USB bridge CAN firmware has been pre-compiled in the FLYOS-FAST system, no need to manually compile the firmware, execute the command below to flash
• You can also choose to manually compile the USB bridge CAN firmware and compile it yourself

• Choose carefully according to your device, FLY system defaults to 1M

• The C5 system defaults to 1M speed, if you need 500K, modify the canbus_bitrate speed in the system configuration

• This command flashes the 1M USB bridge CAN firmware

fly-flash -d c5 -h -f /usr/lib/firmware/klipper-h723-128k-usbcan-1m.bin

• This command flashes the 500k USB bridge CAN firmware

fly-flash -d c5 -h -f /usr/lib/firmware/klipper-h723-128k-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, and then press Y key when Save configuration appears

• Now the configuration should be saved, and it returns to the command line interface

• Enter the following command to start compiling, it takes some time

make -j4

• Finally, if the following content is output, the compilation is successful

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Firmware Flashing

tip

Execute the following command to flash the firmware

sudo fly-flash -d c5 -h -f ~/klipper/out/klipper.bin

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Search for CAN ID

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

2. Open the host computer's web interface, 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. Click on printer.cfg, then click DEVICES in the upper right corner.

4. Click CAN, then refresh.

   Refresh for fluidd

   Refresh for mainsail

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

   For fluidd, confirm the first arrow points to Klipper, then click the right arrow to copy.

   For mainsail, confirm the first arrow points to Klipper, then click the right arrow to copy.

Enter the CAN ID

1. Close DEVICES and enter 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 queried>

In fluidd, find [MCU]

In mainsail, find [MCU]

2. Enter the ID into the configuration

tip

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

3. If Klipper displays 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 in this document are examples. Each mainboard has a unique ID, so please enter the actual ID you obtained.

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