Breizh Entropy Congress (2010)
I launched the first edition of the Breizh Entropy Congress, held in Rennes in April 2010. This meeting brought together a few hundred people interested in DIY and open source.
Passionate individuals and non-profit organizations from the region of Rennes, Brittany, France invite you to participate in the first Breizh Entropy Congress. This inter-disciplinary event focuses on free (as in freedom) creations and culture. Through a meeting fostering open-mindedness, exchange of ideas and learning, we hope to show solutions to technical, social and political problems, and celebrate free, reclaimed and creative art and technology.
RT2501U/RT2571W Wi-Fi driver for ultra-embedded devices (2006)
This driver enables the use of the low-cost RT2501U/RT2571W SoftMAC Wi-Fi cards on platforms with very limited resources.
It is particularily well-suited for cost-sensitive consumer electronic devices. This driver has been used in mass production with the Nabaztag/tag devices (aka Nabaztag V2). Following the demise of Violet, the driver is now open source.
Features
- Industry-proven
- Written in C
- High portability
- Low memory footprint
- Low CPU resource usage
- Integrates 802.11-compatible stack
- Supports Client (managed) mode
- Supports Access point mode
- Supports WEP
- Supports WPA-PSK
Typical environment
- 30MHz ARM7-based microcontroller
- 64kB Flash*
- 64kB RAM*
- USB host controller (DMA-capable or with shared memory)
- Any Wi-Fi card based on the Ralink RT2501U/RT2571W chipset
- USB stack (not included)
- TCP/IP stack (not included)
Prism54 (2005-2006)
I have worked on the reverse engineering of the SoftMAC Wi-Fi chipsets from Intersil ("Prism54" chipsets), and used to be a maintainer of the prism54.org website.
I have notably developed :
- p54u, a FreeBSD driver that supported the SoftMAC chipsets.
- documentation about the internals of them (memory maps, on-chip peripherals, ...), obtained by experimentations.
- FreeMAC, an attempt at writing a GPL firmware for those chipsets.
- Microstumbler, a project aimed at autonomous Wi-Fi scanning using only the Wi-Fi card and a couple of external components.
I have now discontinued works related to Prism54 ; and prism54.org now links to p54, which is a more up-to-date driver for Linux and recommended for today's users. For archival purposes, the old project pages can be found here the mailing list archives are here : prism54-devel and prism54-users. Snapshots of the latest SVN revisions have been put here.