Spider Klipper Firmware

The firmware installation process for the Fysetc Spider MCU.

Prerequisites

Klipper must be installed onto the Raspberry Pi
It is desirable, though not strictly necessary to have a small sdcard available
Even if you intend to power your Pi with the Spider, during this flashing process, you will find it far more convenient to power your Pi from some other source, such as a regular USB power supply
Voron Design recommends using USB to control the Spider, which simply requires connecting a USB-A to USB-C cable between the Spider and Pi. If you prefer a UART connection, please consult the fysetc documentation for the necessary configuration adjustments.

Build Firmware Image

Run the following:

 sudo apt install make
 cd ~/klipper
 make clean
 make menuconfig

In the menu structure there are a number of items to be selected.
- Select “Enable extra low-level configuration options”
- Set the micro-controller architecture is set to STMicroelectronics STM32
- Set the Processor model to STM32F446
- If your Spider was made after 2021/06/23 (this includes every V2.2), set the Bootloader offset to 32KiB bootloader
- If your Spider was made prior to 2021/06/23, set the Bootloader offset to 64KiB bootloader
- Set the Clock Reference to 12 MHz crystal
- Set the Communication interface to USB (on PA11/PA12) (note: see Fysetc documentation if you intend to use UART rather than USB)
Once the configuration is selected, press q to exit, and “Yes” when asked to save the configuration.
Run the command make
The make command, when completed, creates a firmware file klipper.bin which is stored in the folder /home/pi/klipper/out.

There are multiple options for getting this firmware file installed onto your Spider.

Firmware Installation

Option 1: DFU Firmware Install

Requires a USB connection
Requires the installation of an extra jumper on the Spider
Does NOT require a microSD card

Power off the Spider
Install a jumper between BT0 and 3.3V
Connect Spider & Pi via USB
Power on Spider
From your ssh session, run lsusb. and find the ID of the DFU device.
Run make flash FLASH_DEVICE=1234:5678, replacing 1234:5678 with the ID from the previous step
Power off the Spider
Remove the jumper from BT0/3.3V
Power up the Spider
You can confirm that the flash was successful by running ls /dev/serial/by-id. If the flash was successful, this should now show a klipper device, similar to:

(note: this test is not applicable if the firmware was compiled for UART, rather than USB)

Option 2: SDcard Firmware Install

Works regardless of USB vs UART
Requires a microSD card

Use a tool such as cyberduck or winscp to copy the klipper.bin file off your Pi, onto your computer.
Rename klipper.bin to firmware.bin

Important: If the file is not renamed, the bootloader will not be updated properly.

Ensure that your microSD card is formatted FAT32 (NOT EXFAT!)
Copy firmware.bin onto the microSD card (if this card has previously been used for this process, remove all old firmware.bin and old .bin files)
Power down the Spider
insert the microSD card
Power on the Spider
After a few seconds, the Spider should be flashed
You can confirm that the flash was successful by running ls /dev/serial/by-id. If the flash was successful, this should now show a klipper device, similar to: