Re: [uCsimm] Development of Dragonball - Coldfire board for ucLinux

From: James Dekorse (
Date: Fri Apr 28 2000 - 01:14:32 EDT


  I do this currently on the MPC823 (PPC embedded variant) and also in the
past on the M68332. I cannot say for certain, but believe this is

  The initial parameters that I set up with the BDM on the 823 are system
protextion control, clearing reset statuses and programming memory (which
consists of programming the UPMA/UPMB and MPTR. I do not know what the
equivalent Coldfire registers are , but am guessing they ae similar.

  Motorola has complete documentation on their website of all their
processors in .PDF format. Here you will find details on teh BDM. It can
also depend on the ICE that you connect through. I use EST (now
WindRiver) visionIce and visionProbe.


> Two questions:
> If I use Coldfire it is easy to debug with the BDM interface, but:
> - Is it possible to initialize the processor and the DRAM, get
> some programm code into the RAM and run it, by the BDM interface?
> There will be no preprogrammt ROM or Flash memory.
> Operation like in bootstrap mode of the Dragonball.
> If I use Dragonball it is easy to get the first code into it
> with the serial interface and the bootstrap mode, but:
> - I found no in-circuid emulation tools for it.
> Did anybody know something?
> I would be very happy if someone can help me with some information ;-)
> Best regards,
> Ralf
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