WinAVR was compiled with a 2 year old version of libusb (v0.1.10) instead of the most recent version (v0.1.12), which means that it is incompatible with the original driver that I posted up on the USBtinyISP download page. Thus if you want to use the latest WinAVR, you must uninstall the driver and then reinstall the older (v0.1.10) version which is now available on the download page.
Otherwise, youll get a nasty surprise:
as the device seems to be working, but avrdude can’t “find” it!
If you don’t want to reinstall the driver, you’ll have to replace the avrdude.exe and libusb0.dll with the modified versions (also available and described in detail on the download page).
The other bad news is that I made some mistakes in the code that make it incompatible with 64-bit. Hopefully I will get that tested/fixed for the next revision…not having a 64 bit machine makes it a bit annoying to debug!
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.