Hi,

When you say "embedded", are we talking about what seems typically described as
"embedded" these days (i.e. embedded PC - 4MB RAM, 20GB Hard disk), or more like
the environment that I am used to, which is (admittedly large in PIC terms) 4K
RAM, 128KB code space? Joking aside, we write our applications in a logical mix
of C/assembler and are probably subject to similar constraints as you
are.....and we enjoy maintainability at the expense of code size , as you might
expect. I had the belief that any decent embedded C programmer would be acutely
aware of how their C affected matters in terms of generated assembler (in which
case, your management would be correct as you get someone that could do both). I
don't think it defeats the object of C to look into the assembler listing to
optimise how you have written a routine; you are merely providing a level of
abstraction which may or may not be a good thing; usually good, though.
I cannot give you any real numbers, sorry.

Regards
Dan

Is it not written in 'Code Complete' about eductating your management? ; )






Sam WILLIAMS <sam.williams@HS.UTC.COM>
12/04/2000 00:34


Please respond to pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>

To:   PICLIST@MITVMA.MIT.EDU
cc:    (bcc: Dan Lloyd/GBPTD/ABB)
Subject:  Question: C vs Asm

Security Level:?         Internal



I am attempting to create a test environment that will answer the question
regarding the viability of using C vs assembler for PIC programming. I know most
of the arguments, but I was wondering if anyone had any references to hard data
that had been accumulated using a large number of test programs. I know the
request may sound stupid, but  company management currently believes that  C
would give us a better opportunity for finding programmers. Code size could be
the caveat. We are developing code for embedded aerospace control applications
which means we have very tight constraints on component selection and use.

Any help would be greatly appreciated.

--- Sam Williams



>>> wf@BLUSOFT.ORG.BR 04/11 7:35 PM >>>
Hi again...

Can the parallel port PC force a Interrupt (INTERRUPT REQUEST) when some
external event occur?

Thanks!

mIGUEL



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