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Prusa-Firmware/BUILDING.md

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Build instructions for Original Prusa i3 MK2/S/MM Firmware

Step 1 - Download and Install/Unpack Arduino

Download and install the Arduino IDE. The most recent version 1.8.5 is available here: https://www.arduino.cc/en/Main/Software

If you already use another Arduino IDE version for other projects and don't want to upgrade to the latest setup, you may want to install a stand-alone (ZIP file) version rather than using the "Windows Installer".

Step 2 - Prepare the Arduino toolchain

  1. Open the IDE
  2. Open file/preferences and set additional boards manager URL to the RAMBo repository:
    https:// raw.githubusercontent.com/ultimachine/ArduinoAddons/master/package_ultimachine_index.json
  3. Open Tools/Boards/Boards Manager and install the RAMBo board:
    "RepRap Arduino-compatible Mother Board (RAMBo) by UltiMachine"
  4. Close the IDE.
  5. Open the IDE and select the RAMBo as target board from the Tools submenu.
  6. Close the IDE

Step 3 - Download PRUSA i3 MK2 Firmware

You can either clone the prusa3d/Prusa-Firmware repository to a local path or download the ZIP file from and unpack it from here: https://github.com/prusa3d/Prusa-Firmware/tree/MK2

Specific released versions of source code in either .zip or .tar.gz packages can be found here: https://github.com/prusa3d/Prusa-Firmware/releases

Step 4 - Configure the Printer Firmware - select variant

The following configurations are availble in the Prusa-Firmware/Firmware/variants directory. (See How-to-choose-firmware.pdf for help choosing configuration.)

  • 1_75mm_MK1-RAMBo10a-E3Dv6full.h
  • 1_75mm_MK1-RAMBo13a-E3Dv6full.h
  • 1_75mm_MK2-MultiMaterial-RAMBo10a-E3Dv6full.h
  • 1_75mm_MK2-MultiMaterial-RAMBo13a-E3Dv6full.h
  • 1_75mm_MK2-RAMBo10a-E3Dv6full.h
  • 1_75mm_MK2-RAMBo13a-E3Dv6full.h

Copy and rename the file representing your configuration to the Firmware directory as Configuration_prusa.h Example:

$ cp Firmware/variants/1_75mm_MK1-RAMBo13a-E3Dv6full.h Firmware/Configuration_prusa.h

Step 5 - Build the Firmware

  1. Open the IDE
  2. Open firmware project with File -> Open... Navigate to and open:
    Prusa-Firmware/Firmware/Firmware.ino
  3. Compile the firmware with Sketch -> Verify/Compile (CTRL-R) --or--
  4. Export the compiled binary with Sketch -> Export compiled Binary (CTRL-ALT-S).
    You will find the exported binary in Prusa-Firmware/Firmware/Firmware.ino.rambo.hex

Step 6 - Upload the Firmware

You can upload the new firmare to the printer using either:

  • The Prusa3D Firmware Updater (download from https://www.prusa3d.com/drivers/)

  • Directly via the Arduino IDE (Select Tools -> Port and 115200 baud rate)

  • avrdude (either direct or thru OctoPrint, etc.). Example command-line:

$ avrdude -v -p m2560 -c wiring -P /dev/ttyUSB0 -b 115200 -U "flash:w:firmware.hex:i" -D