This is the mail archive of the crossgcc@sourceware.cygnus.com mailing list for the crossgcc project.
See the CrossGCC FAQ for lots more infromation.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
On Mon, Jan 24, 2000 at 12:34:31PM -0500, Quality Quorum wrote: > I am sick an tired of various BDMs to the extent that I am going to > put together BDM interface implemented by FPGA/CPLD which will work > over standard EPP port, and I am going to make verilog/vhdl code for > the thing available along with gdb target code supporting it. Don't reinvent the wheel... There's already a plethora of BDM interfaces out there including, but not limited to - motorola two-chip PD interface - public five chip interface - P&E ICD interface - Pavel Pisa's(?) P&E clone(?) (16v8 PAL based) - various other commercial solutions from EST, softaid, and god knows who else... and this is just CPU32... I have no idea if any of these work with Coldfire or PowerPC. the two-chip is unsuitable due to timing issues. the five-chip is unsuitable if you want control over the BERR\ line. [1] the P&E/Pavel Pisa ICD interface lacks a clean driver. [2] Ideally support for all of these could be put under the same driver structure and distributed WITH gdb, or at the very least folded under the same set of patches. [3] [1] I was in the process of modifying my five chip to allow direct banging of BERR\, when a working BDM interface box from EST showed up on my desk. Pricy thing, but it works without me having to fiddle with it. I've been trying to get a working CPU32 BDM interface under linux now for about two and a half months. I'm certainly no hardware expert or programming wizard, but it seems like in the time the 683xx line of CPUs have been out, a free-software/hardware geek ought to have put something together that works. I guess there's far less people designing embedded systems in their living rooms than are hacking on free software... ;) [2] of the two linux BDM drivers sets I've seen, the Chris Johns / Eric Norum driver appears to be the cleanest. I'd suggest using it as the base from which to hack on... -- Aaron J. Grier | Frye Electronics, Tigard, OR | aaron@frye.com "The simplistic anthropomorphism which asserts that source code has a life separate from its creator or maintainer is the product of one too many viewings of Tron." -- paraphrasing of anonymous post on /. ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sourceware.cygnus.com
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |