Re: Startup code


"Meindert Sprang" <mhsprang@xxxxxxxxxxxxxxxxxxx> wrote in message
news:11c4t1rcaohggba@xxxxxxxxxxxxxxxxxxxxx

> I'd like to disagree with this. In all compilers I used so far, the
startup
> code only set's up the very basic things like the stack pointer, code and
> data segments dependig on the CPU used and initializing all variables and
> constants.

> The rest, like further processor and peripheral initialisation is
> done in user written C functions.

That is still startup code, even if written in C.

And so far, I have never written start up
> code, I could always use the start up code supplied by the compiler
vendor,
> which is automatically chosed and configured by most IDE's.

The compiler vendor will not typically know how the processor
is connected to the other devices, such as memory bus widths,
clock timings etc. That's why YOU (the designer) has to write it.

There seems to be this perception that startup code is specifically
assembler. It *could* be written that way but I've always
written my startup code in a combination of C and assembler.

Richard [in PE12]


.

Relevant Pages

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