Lpc2000

----- Original Message ----- 
From: "bclapper29" <clapper@...>
To: <lpc2100@yahoogroups.com>
Sent: Sunday, January 04, 2004 4:07 AM
Subject: [lpc2100] Re: trouble programming our prototype board w/ lpc210x
ISP


> --- In lpc2100@yahoogroups.com, Robert Adsett <subscriptions@a...>
> wrote:
> ...snip....
> > Did you try a different CPU than the one you hooked up to the
> serial port
> > directly?  The CPU is 5V tolerant but I doubt it likes RS-232
> levels very
> > much.  That would damage the Rx line on the CPU (It might even
> appear to be
> > intermittent).
> >
>
> The first time we tried it directly from the serial port and when it
> didn't work, we thought we fried the Tx and Rx pins - subsequently,
> we connected to the Tx and Rx lines on the Ashling board. (Which went
> through the MAX3232 converter. This brought the voltage down to 3.3.
>
> > Also you mentioned that you are pretty sure you got it into ISP
> mode
> > because the program doesn't start (sounds like a good test).  Have
> you
> > tried simply using a serial terminal to run through the first few
> steps of
> > the communication when it is in that mode?  And compared it with
> the
> > ashling board?
> >
>
> Actually we didn't try that. Would we use Hyperterminal or Telnet?
> Not sure exactly how to do this. Any examples published anywhere?
> I assume that using this technique we could step through the ISP
> protocol to confirm if we are talking to the device? Right?

It's documented in the User Manual: p 179.

Hyperterminal should work.

Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html