Cube Hack part II (software)

I’ve created a Google code project with the snappy title of avr-usb-rgb-led. It is based on the hid-custom-rq example from AVR usb examples. I’ve added 3 new commands, one for each LED. It uses a software PWM to control the brightness of each LED based on the value set.

There is a coresponding program using libusb which allows you to send the commands, it simply allows you to set the colour of the cube with an RGB tuple on the command line.

To get the code you need to check out using subversion. To flash the chip you probably want to use the makefile.

This entry was posted in ATTiny45, AVR, Electronics, Firmware, Software, Uncategorized and tagged , , , . Bookmark the permalink.

6 Responses to Cube Hack part II (software)

  1. Pingback: Cube follow up « Dave’s Blog

  2. Dennis says:

    OK our little project group over at the forums got it compiled and working with linux now, after a few minor issues with permissions of the executable in question. It seems to access the usb device, superuser privileges are needed, why/how could this be? Anyway we found a workaround to this too, and now plans are to re-write my python notifier scripts to work with your USB notifier too.
    Further plans are to port these to Windows at a later point in time, could you recommend a C compiler for this task maybe? (I thought maybe MinGW, but since I still have no real clue about C I thought I’d better ask here)

    Just wanted to say thank you for inspiration and help, if you’d like to have a second nice “USB dongle” style notifier let me know I’ll gladly donate one. 😉

    keep it up,


  3. Dennis says:

    Hi Dave,

    I happened to talk to Scott Merryfield, author of “Scotts gmail notifier” software – which coincidentally is also a capslock notifier software 😉 – (see, and he agreed to include hardware support for your “avr-rgb-usb-led” device. But since I’ve not managed to get VisualC++ to compile anything at all (and I do not own a Mac do do the work with), I want to ask you if you could kindly provide a precompiled version of that “set-led.exe” so Scott can start toying with it (and the hardware I’m about to send him for the purpose).(?)



  4. Scott says:

    Scott’s Gmail Alert is 100% free and works with that LED program now!

  5. hi , i want to know pls , tht howand wht if we put in attiny45 so tht it start communicating with host pc thrgh .rply as fast as possible. Is their any changes r necessary to be done in pc.



  6. Brian says:

    Where is your code for software PWM? I’m having a hard time understanding it compared to (in my opinion) the relatively straightforward hardwarePWM.

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