Re: Starting with No Byte Access

This sounds like the software guy who maybe does not
understand the hardware. It is not as simple as
merely not performing byte accesses ! You must fully
understand the bus interface of the ColdFire and when
the BE lines are in fact used. In general, when you
speak of BE you are concerned about write access only.
 However, there is nothing in software you can really
do about the bus interface treatment of mis-aligned
write access. Alas, your only solution is to patch
the board.

> For SwiftX on processors with byte-addressable
> external memory (e.g.
> Coldfire), do you know how to bring bring SwiftX up
> with no byte addressing?
> A h/w design flaw swapped the byte enable lines
> going into the 16-bit SRAM
> chips so only long accesses work. Pressing F9
> causes SwiftX to lock up.
> The code enters POWER-UP START GO DEBUG-LOOP XTL and
> ACK where HALT is
> issued; it doesn't get past that.

        
                
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Received on Thu Dec 16 2004 - 09:50:10 PST