Lpc2000

At 10:58 PM 11/10/04 +0000, you wrote:

>Hello,
>
>
>I want use the flash into the arm since are only more or less 50 bytes
>the constants variables!!!
>
>I would like somebody to see if this boot.s works with IAP??
>
>the boot.s that I use is:
>

<snip>


>Well, the startup has to reserve space for the IAP working memory.  Other
>
>than that there shouldn't be an issue with startup code.  Personally I'd
>
>use an external serial (SPI or I2C FRAM or EE) for parameter storage in
>
>order to allow finer grained updating (ie byte at a time).  On the other
>
>hand a large block of relatively constant (such as calibration)
>parameters
>
>would work well.

The simple answer is no.  It doesn't reserve the space needed.  The 
simplest place to reserve it would actually be in the ld file.

As a quick fix change the following in the ld file

MEMORY {
   flash : ORIGIN = 0, LENGTH = 120K
   ram : ORIGIN = 0x40000000, LENGTH = 16K
   }

__ram_size__ = 16K;

Change the LENGTH parameter of ram: and the size of __ram_size__ to leave 
the amount of space needed at the top of ram.  You'll have to read the 
documentation I don't remember what the amount of space needed is.  Feel 
free to contribute it back to the newlib-lpc collection.  It's not been 
added so far because no-one who is contributing (including me) has needed 
and contributed the change.  It is on my list by rather low on it.

Robert


" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III