Re: Startup code



Jack Klein wrote:
> On 29 Jun 2005 01:58:33 -0700, ravikumar.n@xxxxxxxxxxxxxxxx wrote in
> comp.arch.embedded:
>
> >
> >
> > Hi all,
> >
> > I am Ravikumar.N, new to embedded systems programming. I have
> > heard a term known as "startup Code" that will be executed in all the
> > processors.
> >
> > Please tell me:
> > 1) what is the meaning of "startup Code"
> > 2) What function it does.
> > 3) Who has to write the startup code.
> > 4) What should be the contents of a "Startup Code".
> >
> > With Regards,
> > Ravi Kumar.N
>
> What amazes me here, considering all the replies to the OP I see here
> so far, is nobody has mentioned one of the most important reasons for
> having boot code.
>
> How do you do a complete memory test before calling the C start-up
> code that requires at least some memory be working? How do you test
> the watchdog chip by forcing a reset?
>
> Don't any of you do serious POST testing of your hardware?

Of course we do, what do you think? :)

But strictly speaking the startup code as provided by
some compilers provides the minimum code from the reset
until the jump to the main function in C.

.

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