Lpc2000

Hi,

I was messing with a Keil MCB2100 board and made the
mistake of clearing PINSEL2 register with all zero's.
It was only after that I noticed in the user manual
that clearing this bits can cause the loss of debug!!!

Anyway, keil seems to come up with a JTAG DEVICE NOT
FOUND since I did this and no matter what I try I
cannot get it to connect.

Any ideas how I fix it?

David

 


		
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At 07:21 AM 2/23/05 -0800, David Bermingham wrote:
>I was messing with a Keil MCB2100 board and made the
>mistake of clearing PINSEL2 register with all zero's.
>It was only after that I noticed in the user manual
>that clearing this bits can cause the loss of debug!!!
>
>Anyway, keil seems to come up with a JTAG DEVICE NOT
>FOUND since I did this and no matter what I try I
>cannot get it to connect.
>
>Any ideas how I fix it?

Serial ISP download to overwrite the troublesome program (or even just 
erase the chip)?

As I recall from other posts (perhaps incorrectly) you can get a JTAG link 
if you manage to connect before the program runs but that may be a bit of 
an issue.

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

Thanks Robert...
That sorted it!!

David

--- Robert Adsett
<subscriptions@...> wrote:

> At 07:21 AM 2/23/05 -0800, David Bermingham wrote:
> >I was messing with a Keil MCB2100 board and made
> the
> >mistake of clearing PINSEL2 register with all
> zero's.
> >It was only after that I noticed in the user manual
> >that clearing this bits can cause the loss of
> debug!!!
> >
> >Anyway, keil seems to come up with a JTAG DEVICE
> NOT
> >FOUND since I did this and no matter what I try I
> >cannot get it to connect.
> >
> >Any ideas how I fix it?
> 
> Serial ISP download to overwrite the troublesome
> program (or even just 
> erase the chip)?
> 
> As I recall from other posts (perhaps incorrectly)
> you can get a JTAG link 
> if you manage to connect before the program runs but
> that may be a bit of 
> an issue.
> 
> 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
> 
> 



		
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Also pulling P0.14 down should work.

--Peter

--- In lpc2000@yahoogroups.com, David Bermingham <crwpulsar@y...> wrote:

> Hi,
> 
> I was messing with a Keil MCB2100 board and made the
> mistake of clearing PINSEL2 register with all zero's.
> It was only after that I noticed in the user manual
> that clearing this bits can cause the loss of debug!!!
> 
> Anyway, keil seems to come up with a JTAG DEVICE NOT
> FOUND since I did this and no matter what I try I
> cannot get it to connect.
> 
> Any ideas how I fix it?
> 
> David
> 
>  
> 
> 
> 		
> __________________________________ 
> Do you Yahoo!? 
> Read only the mail you want - Yahoo! Mail SpamGuard. 
> http://promotions.yahoo.com/new_mail