I did this by mistake when switching between Arduino Leonardo and Sparkfun Pro Micro 5V (defaults to 3.3V, first in list) clone Boards. Good Luck - and May the Trackball Twinkle in Multiple Colours! Unless you are thoroughly read on the operation of your micro-controller chip.įuse bits are only changed when you do a physical write by click on Write Use caution when reprograming Fuse bits (L-FF, H-D8, E-C8) & Bootloader,Īs incorrect settings may brick your microcontroller. ‘Fuse & Lock bits’ panel should allow changes to bits and recalculate the new byte value. (8 Bit names per Byte, some are blank).Ĭlick on Read for both ‘Fuses & lock bits’Ĭlick on Manage and save a preset for your Pro Micro - also write down your defaults programmed into your micro-controller.Ĭlick on Bit selector it should now show the breakout of your ‘Fuse & Lock bits’ Update bits.xml with any differences or missing Bit names You may need to check Start, Control Panel, System, Device Manager for any device driver issues.Ĭlick on Detect - Your MCU/signature should respond. Your computer should find your AVR programmer. Your MCU ‘signature’ can be verified by starting AVRDUDESS withĬonnect your Pro Micro to your custom wired harness(dual connectors side).Ĭonfirm and connect to the ICSP header(6-pin side) on your USBtinyISP. When finished should look like AVRDUDESS - Configure ‘bits.xml’ Note: ‘Bit No’, and ‘Bit Byte name’ from ATmel pages as you will need to change or add a few ‘Bit Byte names’. Insert after ‘atmega32’ and change name to ‘atmega32u4’. (Keep ‘atmega32’ & ‘atmega328p’ visible.)Ĭopy and paste ‘atmega328p’ XML ‘mcu’ tag group (6 lines) You can collaspse (Alt+2) & uncollaspse (Alt+Shift+2) extra ‘mcu’ tags. Start Notepad++ and load XML file ‘C:\Program Files (x86)\AVRDUDESS\bits.xml’. You will need to add XML ‘mcu’ tag group including attributes for your ATMega32U4 MCU.Īttributes for High/Low/Extended & Lock bits can be found in the three manual pages listed belowĪTmel manual for ATMega32U4 pages: 346 - 348 If you use Arduino IDE, I believe that includes a copy of AVRDUDE within the install package. Via SPI (Serial Peripheral Interface) pins SCLK, MOSI, MISO, SS (Pro Micro holds low)ĭownload and install AVRDUDESS - GUI version of AVRDUDE.ĭownload and install USBtinyISP drivers - follow link to GitHub.ĭownload and install Notepad++ to edit XML file ‘C:\Program Files (x86)\AVRDUDESS\bits.xml’ or any other software to edit XML files. ICSP (In Circuit Serial Programming) 6-Pin Cable coverted to Arduino Pro Micro headers. Harness is a single 3x2 Female JST connector wired into a dual 4x1 Female JST connector, or I used an USBtinyISP Programmer with a custom wire harness to connect a Pro Micro. How I Changed my Pro Micro Fuse bits Arcade Trackball - based off Spinner version 2 View on GitHub How I Changed my Pro Micro Fuse bits How I Changed my Pro Micro Fuse bits | Arcade-Trackball Skip to the content.
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