ifusb is a simple toolkit to access GPIO/UART/SPI/I2C from USB host through microcontroller.
It was initialy attended for use with [coming soon] eink panel controller project, but can be used as a tool for any project, like a Bus Pirate board or a FT2232 chip.
The ifusb board use STM32F042 TSOP chip with libopencm3 for microcontroller side, and libusb for host side.
Hi gogonkt, I'm not sure to understand do you have an example of what you have in mind?