Lpc2000

> >I would have thought the Philips LPC2000 flash utility would have
> >a option that sets a protection bit after its done flashing the
> >LPC2194.  The closest thing I've seen is message 2619:
> >http://groups.yahoo.com/group/lpc2000/message/2619
> >Can anyone help me with some pointers?

> That's pretty well the sum total of it.  The flash is read protected
> by having a specific location programmed to a specific value.  I
> suspect everyone who uses it has it in their startup since the
> location is just above the exception vectors.

Hi Robert, thanks for the reply!

As it usually happens, pretty much after I pushed the button to post my
question I looked in the most recent LPC21xx/22xx user guide.  On page 269
there is a VERY short paragraph on Code Read Protection.  This should be
very easy to do with the Keil compiler.  All I should need is:
const unsigned int CodeReadProtect _at_ 0x000001Fc = 0x87654321;

I'll give it a try and see if it works...

Greg Deuerling
Fermi National Accelerator Laboratory
Feynman Computing Center, Room 370, MS 368
P.O.Box 500 Batavia, IL 60510
(630)840-4629     FAX  (630)840-5406
Electronic Systems Engineering Group
Work: egads@...v
Personal: gdeuerling@...

  
________________________________________
From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf
Of Robert Adsett
Sent: Monday, April 25, 2005 1:56 PM
To: lpc2000@yahoogroups.com
Subject: Re: [lpc2000] Code read protection in the LPC2194


At 06:19 PM 4/25/05 +0000, gregdeuerling wrote:
>I know the LPC2196 with Bootloader 1.61 or above supports code read
>protection (CRP).  I've searched Philip's site, I've searched the
>LPC2000 Yahoo groups, and I searched the Keil compiler site and have
>not found any REAL info on how to protect the code in my LPC2194 from
>being read out.  Is there any documentation out there on how to do
>this?
>
>I would have thought the Philips LPC2000 flash utility would have a
>option that sets a protection bit after its done flashing the LPC2194.
>
>The closest thing I've seen is message 2619:
>http://groups.yahoo.com/group/lpc2000/message/2619
>
>Can anyone help me with some pointers?

That's pretty well the sum total of it.  The flash is read protected by 
having a specific location programmed to a specific value.  I suspect 
everyone who uses it has it in their startup since the location is just 
above the exception vectors.

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
http://www.aeolusdevelopment.com/


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