RS232 Firmware Compilation

Start Compilation

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.

Use tools like MobaXterm, PuTTY, etc., to SSH into the host.

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)

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

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

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

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Select Enable extra low-level configuration options and press Enter

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

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

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Select Bootloader offset, choose:NO bootloader

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Select Clock Reference (8 MHz crystal), choose:25 MHz crystal

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Communication interface, select:Serial (on USART1 PA10/PA9)

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Select GPIO pins to set at microcontroller startup, input: !PA15 Note: The exclamation mark is uppercase.
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Press the Q key, when Save configuration appears, then press the Y key
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The configuration should now be saved and you will be returned to the command line interface
Enter the following command to start compilation; it may take some time

make -j4

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

Tip

The top is the RESET button, and the bottom is the BOOT button

There are two methods to enter DFU
First method: With the mainboard completely powered off, hold the BOOT button, then connect one end of a data cable (with data transmission capability) to the mainboard and the other end to the host computer.
Second method: Connect one end of a data cable (with data transmission capability) to the mainboard and the other end to the host computer. Hold the BOOT button, then press the RST button. Release the RST button, and finally release the BOOT button.
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Install the flashing tool
- No need to install the flashing tool for the FLY host computer
- If you need to install it, please note: The host computer must have internet access for proper installation
- If already installed, there is no need to install again
```
sudo apt update
sudo apt install dfu-util -y
```
Run the following command to check if the connection is successful.
```
lsusb
```
- If no DFU device is found, please try re-entering flashing mode
- Due to system version differences, it may display a different name. If you see 0483:df11, it indicates that the flashing mode has been entered
  
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Flash the firmware
- Run the command below to start flashing. Replace <full path of firmware file> with the actual firmware file path
```
sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D <full path of firmware file>
```
If the message File downloaded successfully appears as shown below, the flashing is successful

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Tip
After flashing is complete, be sure to completely power off the motherboard once.