Yahoo Groups archive

Lpc2000

Index last updated: 2026-04-28 23:31 UTC

Message

external memory on LPC2214

2006-04-25 by Timo Bruderek

Hi All !!

I am a student at University of applied science Augsburg and currently
working on my Final Year Project.
It is a Webserverboard based on a LPC2214 with 4MB external SRAM to be
able to run uCLinux.
I build the board and tested the external memory using a little test
routine.
I wrote  a value to a pointer in the external SRAM and read it back.
Everything looks ok so far, but if i load ucLinux in the SRAM, i get an
interrupt for an undefinded intstruction.
If i use OpenOCD and have a look at the memory, i saw, that the content
is not right. The upper half-word is on a different address the the
lower half-word. It looks like that the upper half-words have on offset.

If i write to memory using a pointer in a C-routine, everthing looks ok
!! Even if i check the content of the memory with OpenOCD. !!

Has anybody an idea, where i can have a look for the error ??

Thanks,
Timo

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.