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• MCU: ARM Cortex-M0 STM32F072C8T6 48MHz with CAN bus
• Stepper Dirver: Onboard TMC2209 in UART mode, UART address: 00, Rsense: 0.11R
• Onboard Accelerometer Sensor: ADXL345
• Onboard Temperature IC: Max31865 Select 2 / 4 lines PT100 / PT1000 by DIP switch (no Max31865 verson have not this feature)
• Input Voltage: DC12V-DC24V 6A
• Logic Voltage: DC 3.3V
• Heating Interface: Hotend (E0), maximum output current: 5A
• Fan Interfaces: two CNC fans (FAN0, FAN1)
• Maximum Output Current of Fan Interface: 1A, Peak Value 1.5A
• Expansion Interfaces: EndStop, I2C, Probe, RGB, PT100/PT1000, USB interface, CAN Interface
• Temperature Sensor Interface Optional: 1 Channel 100K NTC or PT1000(TH0), 1 Channel PT100/PT1000
• USB Communication Interface: USB-Type-C
• DC 5V Maximum Output Current: 1A

• Only supports Klipper at the present.

• EBB36 CAN V1.0
  
  
• EBB42 CAN V1.0
  
  

1. Precompiled firmware(The source code version used isCommits on Nov 20, 2023)

   • firmware_USB.bin Use USB to communicate with raspberry pi / BTT Pi.
   • firmware_canbus.bin Use CAN bus to communicate with raspberry pi / BTT Pi, baudrate = 1000K.

2. Build your own firmware
   

   1. Refer toklipper's official installation to download klipper source code to raspberry pi

   2. Building the micro-controller with the configuration shown below.

      • [*] Enable extra low-level configuration options
      • Micro-controller Architecture =STMicroelectronics STM32
      • Processor model =STM32F072
      • IF USE CanBoot
        • Bootloader offset =8KiB bootloader
      • ELSE
        • Bootloader offset =No bootloader
      • Clock Reference =8 MHz crystal
      • IF USE USB
        • Communication interface =USB (on PA11/PA12)
      • ElSE IF USE CAN bus
        • Communication interface =CAN bus (on PB8/PB9)
        • (1000000) CAN bus speed

      
      

   3. Once the configuration is selected, pressq to exit, and "Yes" when asked to save the configuration.

   4. Run the commandmake

   5. Theklipper.bin file will be generated in the folderhome/pi/kliiper/out when themake command completed. And you can use the windows computer under the same LAN as raspberry pi to copyklipper.bin from raspberry pi to the computer withpscp command in the CMD terminal. such aspscp -C pi@192.168.0.101:/home/pi/klipper/out/klipper.bin c:\klipper.bin(The terminal may prompt thatThe server's host key is not cached and askStore key in cache?((y/n), Please typey to store. And then it will ask for a password, please type the default passwordraspberry for raspberry pi)

• sample-bigtreetech-ebb-canbus-v1.0.cfg includes all the correct pinout for EBB36 & 42 CAN V1.0

• MCU: ARM Cortex-M0+ STM32G0B1CBT6 64MHz whit FDCAN bus
• All other parameters are the same as EBB36 & 42 CAN V1.0

• Only supports Klipper at the present.

• EBB36 CAN V1.1 and V1.2
  
  
• EBB42 CAN V1.1 and V1.2
  
  

1. Precompiled firmware(The source code version used isCommits on Nov 20, 2023)

   • firmware_USB.bin Use USB to communicate with raspberry pi.
   • firmware_canbus.bin Use CAN bus to communicate with raspberry pi, baudrate = 1000K.

2. Build your own firmware
   

   1. Refer toklipper's official installation to download klipper source code to raspberry pi

   2. Building the micro-controller with the configuration shown below.

      • [*] Enable extra low-level configuration options
      • Micro-controller Architecture =STMicroelectronics STM32
      • Processor model =STM32G0B1
      • IF USE CanBoot
        • Bootloader offset =8KiB bootloader
      • ELSE
        • Bootloader offset =No bootloader
      • Clock Reference =8 MHz crystal
      • IF USE USB
        • Communication interface =USB (on PA11/PA12)
      • ElSE IF USE CAN bus
        • Communication interface =CAN bus (on PB0/PB1)
        • (1000000) CAN bus speed

      
      

   3. Once the configuration is selected, pressq to exit, and "Yes" when asked to save the configuration.

   4. Run the commandmake

   5. Theklipper.bin file will be generated in the folderhome/pi/kliiper/out when themake command completed. And you can use the windows computer under the same LAN as raspberry pi to copyklipper.bin from raspberry pi to the computer withpscp command in the CMD terminal. such aspscp -C pi@192.168.0.101:/home/pi/klipper/out/klipper.bin c:\klipper.bin(The terminal may prompt thatThe server's host key is not cached and askStore key in cache?((y/n), Please typey to store. And then it will ask for a password, please type the default passwordraspberry for raspberry pi)

(Only for EBB 36/42 CAN V1.1)
STM32G0B1CB needs to jump to the System memory area to run bootloader (written by STMicroelectronics) when using DFU to update firmware through the Type-C port. Referring to the description in manualAN2606, The initialization process of this bootloader is shown in the following figure:

The IO of USART will be configured before going to the USB DFU mode.
After going to DFU mode, PA2 will be configured to output high level by bootloader in System memory area refer to thedatasheet of STM32G0B1CB

PA2 is used for the hotend MOSFET in EBB36 & 42 CAN V1.1, The high level in the DFU mode change the hotend into heating state. Therefore, please pay attention to disconnect the main power VIN of the hotend when using the DFU of Type-C port to update the firmware, or ensure that the firmware update is completed soon and goto the normal working mode. Never keep MCU in DFU mode for a long time when the main power supply and hotend are connected.

• sample-bigtreetech-ebb-canbus-v1.1.cfg includes all the correct pinout for EBB CAN 36&42 V1.1

V1.2 compared with v1.1: only the IO of hotend is changed fromPA2 toPB13

• sample-bigtreetech-ebb-canbus-v1.2.cfg includes all the correct pinout for EBB CAN 36&42 V1.2

• MCU: ARM Cortex-M0+ STM32G0B1CBT6 64MHz whit FDCAN bus
• Stepper Dirver:
  • TMC2209 Version: Onboard TMC2209 in UART mode, UART address: 00, Rsense: 0.11R
  • TMC2240 Version: Onboard TMC2240 in SPI mode
• Onboard Accelerometer Sensor: ADXL345
• Onboard Temperature IC: Max31865 Select 2 / 4 lines PT100 / PT1000 by DIP switch
• Input Voltage: DC12V-DC24V 9A
• Logic Voltage: DC 3.3V
• Heating Interface: Hotend (E0), maximum output current: 5A
• Fan Interfaces:
  • 2 x CNC fans (FAN1, FAN2)
  • 1 x 4-wire fan (4W_FAN)
• Maximum Output Current of Fan Interface: 1A, Peak Value 1.5A
• Expansion Interfaces: EndStop, Bltouch, Proximity(NPN & PNP), RGB, PT100/PT1000, USB, CAN, SPI
• Temperature Sensor Interface Optional: 1 Channel 100K NTC or PT1000(TH0), 1 Channel PT100/PT1000 (Max31865)
• USB Communication Interface: USB-Type-C
• DC 5V Maximum Output Current: 1A

• Only supports Klipper at the present.

• EBB SB2240 CAN V1.0
  
  
• EBB SB2209 CAN V1.0
  
  

1. Precompiled firmware(The source code version used isCommits on Jan 8, 2023)

   • firmware_USB.bin Use USB to communicate with host.
   • firmware_canbus.bin Use CAN bus to communicate with host, baudrate = 1M.
   • firmware_canbus_8k_bootloader.bin Use CAN bus to communicate with host, baudrate = 1M, 8KB bootloader for Canboot.

2. Build your own firmware
   

   1. Refer toklipper's official installation to download klipper source code to host

   2. Building the micro-controller with the configuration shown below.

      • [*] Enable extra low-level configuration options
      • Micro-controller Architecture =STMicroelectronics STM32
      • Processor model =STM32G0B1
      • IF USE CanBoot
        • Bootloader offset =8KiB bootloader
      • ELSE
        • Bootloader offset =No bootloader
      • Clock Reference =8 MHz crystal
      • IF USE USB
        • Communication interface =USB (on PA11/PA12)
      • ElSE IF USE CAN bus
        • Communication interface =CAN bus (on PB0/PB1)
      • (1000000) CAN bus speed

      
      

   3. Once the configuration is selected, pressq to exit, and "Yes" when asked to save the configuration.

   4. Run the commandmake

   5. Theklipper.bin file will be generated in the folderhome/pi/kliiper/out when themake command completed. And you can use the windows computer under the same LAN as host to copyklipper.bin from host to the computer withpscp command in the CMD terminal. such aspscp -C pi@192.168.0.101:/home/pi/klipper/out/klipper.bin c:\klipper.bin(The terminal may prompt thatThe server's host key is not cached and askStore key in cache?((y/n), Please typey to store. And then it will ask for a password, please type the default passwordraspberry for raspberry pi orbiqu for CB1)

• sample-bigtreetech-ebb-sb-canbus-v1.0.cfg includes all the correct pinout for EBB SB2240_2209 CAN V1.0
• TMC2209 Version: uncomment tmc2209 config and comment tmc2240 config

  [tmc2209 extruder]uart_pin: EBBCan: PA15run_current: 0.650stealthchop_threshold: 999999# [tmc2240 extruder]# cs_pin: EBBCan: PA15# spi_bus: spi2_PB2_PB11_PB10# run_current: 0.650# stealthchop_threshold: 999999

• TMC2240 Version: uncomment tmc2240 config and comment tmc2209 config

  # [tmc2209 extruder]# uart_pin: EBBCan: PA15# run_current: 0.650# stealthchop_threshold: 999999[tmc2240 extruder]cs_pin: EBBCan: PA15# spi_bus: spi2_PB2_PB11_PB10driver_TPFD: 0run_current: 0.650stealthchop_threshold: 999999

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https://www.biqu.equipment/products/bigtreetech-ebb-36-42-can-bus-for-connecting-klipper-expansion-device