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> > On Fri, 6 Jun 1997, Chris Johns wrote: > > > > I got it from a friend of mine, but you can also find it on > > ftp://ftp.cygnus.com > > I'm not sure about the directory, but I think /pub/gdb > > file is gdb-bdm-patches.tar.gz or similar. > > > > the patch is relative to gdb-4.13 but I patched a gdb-4.16 with it > > (had to tweak the gdb/Makefile) > > I did the 4.13 patches some time back, when I still was at the University. > The patches have somehow wandered to Cygnus, but haven't been updated since > then. > > Rob: If you read this, could you please add a pointer in > ftp://ftp.cygnus.com/pub/embedded > to the URL below? 4.13 is definately obsolete. > > Last summer I did the move to 4.16 and added some more features. > > see: > ftp://ftp.lpr.e-technik.tu-muenchen.de/pub/bdm/gdb-4.16-bdm-patches.tgz > > A word to porting the driver and the gdb patches to ColdFire: > > Unfortunately I have neither a ColdFire-System nor a data book available, > but I have heard there are more features in the ColdFire BDM interface, > than in CPU32 (trigger capability on access to specific addresses). > > The driver for CPU32 and CPU32+ boils down to send the BDM commands over > the BDM send/receive line. _If_ this is still a 10/8 pin connector with the > same timing, you can use the many available PD parallel port BDM > interfaces, and so probably the driver with only minor changes. But this > needs very careful checking re. timing, etc. Especially the single > stepping is very critical. However, it seems workable. > Sorry chaps but the BDM interface on Coldfire is very different from that on CPU32 - it also uses a 26 pin connector and not the CPU32 8 or 10 pins. However it is a much better BDM interface than CPU32 in that it allows dynamic access to memory, on-chip breakpoints (better than 68360) and nearly non-intrusive tracing of program execution. On the down side you cant do a simple BDM parallel cable interface since the BDM serial transfer has to be synchronised to the CPU which is just not possible without some extra hardware in the cable header. I should point out that Noral who I work for makes BDM interfaces for both CPU32 and Coldfire ... but I will say no more. Regards. --------------------------------------------------- Tony Armitstead tonya@noral.co.uk Noral Micrologics Ltd. http://www.noral.com Logic House, Gate St. ftp://ftp.noral.com Blackburn, Lancs. Tel: 01254 682092 England, UK. Fax: 01254 680847 ---------------------------------------------------