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Trying to load Marlin firmware onto bricked Ultimaker 2

andy1583

By andy1583
in Ultimaker 3D printers

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andy1583

andy1583 0

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Posted · Trying to load Marlin firmware onto bricked Ultimaker 2

Hi all,

I acquired a couple of Ultimaker 2s recently, with both appearing to have bricked 2560 chips on the control board.

Both boards have had their chips removed, with one being replaced.

I've managed to get the Arduino bootloader onto it and it is reading back ok, but the board isn't showing up as a USB device on Windows, so I can't upload the Marlin firmware to it.

Am I missing something? The 24V stuff appears to be working ok, and I get an LED on when the board is powered through the power supply, but nothing on the USB.

Is there a way to load the firmware onto the 2560 through another method other than USB?

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    Daid

    Daid 303

    Posted
    Posted · Trying to load Marlin firmware onto bricked Ultimaker 2

    There is also an ATMega16U2 (Or ATMega8U2, or ATMega32U2) on there. It's located near the USB connector.

    It needs the USB serial firmware from Arduino:

    atmega16u2-Mega2560-Rev3.hex @ https://github.com/arduino/Arduino/tree/master/hardware/arduino/avr/firmwares/atmegaxxu2/arduino-usbserial

    Seeing that you manage to put a bootloader on there, it sounds like you have a working AVR ISP. With that you could also just load the firmware on the ATMega2560, instead of just the bootloader.

    You also need to program the proper fuses. Fuses for the ATMega16U2:

    ef d9 fc

    Fuses for the ATMega2560:

    ff d0 fd

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