u-wire by cpldcpu is a minimal (but spec-compliant!) USB firmware for the AVR atTiny10 microcontroller. Using very clever assembly code, it provides support for the mandatory transactions required for usb implementations using only 1kB of program memory and 32 bytes of RAM. It can be used to build simple USB devices.
The standard kernel-mode windows driver provided here can be used to recognize and communicate with devices running cpldcpu's firmware.
- Tested with WDK for Windows 10, version 2004 (will likely work with other versions)
- Visual Studio with the Windows SDK and C++ tools
- Spectre-mitigated libraries for your target environment (selected in Visual Studio installation)
A bare-bones pyQt 5 GUI is included in /app/. It acts as a wrapper around C code that uses IOCTL requests to communicate with the driver interface. The driver must of course already be installed.
Some debugging output showing the device driver is working correctly:
