userial

This project is no longer active (some might call it finished). Please use one of the many alternatives on the web. The project source files are left online for historic reasons.

Index

Description

userial is a project building a free USB to I²C/SPI/GPIO bridge, using the Atmel AT90USB647 chip. Hardware and Software are released under an Open Source licence. It supports the following interfaces:

The board communicates with the host computer using a CDC (USB communications device class). This makes it easy to use userial without installing a device driver or special libraries. Due to the ASCII based command interface it is easy to control devices manually with just a terminal emulation. This makes it easy to obtain quick results, to configure devices on-the-fly or to control prototyping boards in a straight-forward way.

Schematics and firmware are available to the public. The firmware is released under the terms of the MIT license and the hardware is released under the terms of the Creative Commons Attribution-Share Alike 3.0 Unported License.

Documentation

Download

If you don't want to build your own hardware, then you might find the micropendous worth a look. The userial firmware should run on an micropendous board with minimal changes.

News

Firmware v1.10 23 July 2013

userial firmware v1.10 released. The changes in this version are:

Firmware v1.9 25 March 2010

userial firmware v1.9 released. The changes in this version are:

Firmware v1.8 31 October 2009

userial firmware v1.8 released. The changes in this version are:

All news can be read in the userial news archive.