I would agree that one would have to know the MCU
architecture before writing in C. I have seen ppl.
written embedded C without knowledge of the MCU
assembly. But it is not a good practice not to know
assembly for the machine that you are working on so
often.

John

--- William Chops Westfield <westfw@mac.com> wrote:

> 
> On Oct 25, 2005, at 8:34 AM, Sam wrote:
> 
> > Some say that using assembler your are more "in
> control" of how code
> > will be placed in memory after building and that
> generally assembler
> > is faster. Is it true?
> >
> Yes, it's probably true.  The question is "how often
> do you actually
> need that sort of control or that (usually small)
> increment of speed?"
> MOST programs do not need to be as small and fast as
> possible; they
> only need to be small enough and fast enough.
> 
> 
> > I would prefer to write code in C because writing
> it is faster.
> 
> Also true "in general."  There are times I've spent
> a long while trying
> to get a compiler to do something tricky, eventually
> giving up and
> taking the 10 minutes it takes to write the function
> in assembler.
> As other have pointed out, you probably need to
> understand a good bit
> of assembler before you can write C programs for a
> microcontroller
> anyway...
> 
> BillW
> 
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