Lpc2000

On 25 Sep 2005 at 15:41, lehighuboy wrote:

> 
> The code is segmented to several C files by function, and a few 
> variables are shared across functions. I defined those variables in
> the first compiled C file, however the other functions in subsequent
> files doesn't see them during the compile. I rather not lump
> everything into one file therefore I wanted to define global variables
> for all C files.

This looks like a C problem, not a LPC2000 specific problem.


If you define a global variable

int foo; 

in one C module, and you want to access it from a different module,
then you need to define

extern int foo;

in the other module. This is standard C.

I suggest that you buy a book on C programming. If you are still struggling
with basic C concepts, then writing C for an embedded processor is going
to catch you out at some point. Just do not buy anything written by Herbert Schildt.
"Kernighan and Ritchie, The C Programming Language, 2nd Edition" is a good 
book to get.

Regards
  Anton


> Thanks, Garrett
> 
> --- In lpc2000@yahoogroups.com, "Anton Erasmus" <antone@s...> wrote: >
> On 25 Sep 2005 at 4:11, lehighuboy wrote: > > > The following question
> involves an LPC2129 and Keil ARM IDE, AA and > > CARM compiler. > > >
> > Are global variables defined in the startup.s file? And, if that's >
> > correct, then where should the code be placed? Finally, how would
> you > > define a global float, unsigned int, char, and const char
> variables? > > (please respond with examples) > > > > Thank you for
> your help! > > > Why would you want to define global variables in the
> startup.s file ? > Define them as you would when writing normal C
> code. The only thing > the startup.s file does, is to setup a suitable
> environment for the C > application to run in, as defined in Standard
> C. > > Regards >   Anton Erasmus > -- > A J Erasmus
> 
> 
> 
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-- 
A J Erasmus