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Lpc2000

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

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Re: [lpc2000] Re: ISP

2004-05-29 by Robert Adsett

Definitely check out James comments.  I've a few questions/comments myself.

At 10:50 PM 5/28/04 +0000, you wrote:
>I have connected the Rx input (3.3V level from the Kickstart board
>to the Rx input (directly at processor) on my board. The upload
>still fails (it works on the Kickstart board, which is sending echos
>and operating in parallel) but the Tx stops sometime during the
>upload on mine [Tx obviously not connected to ISP utility - only for
>monitoring]).

I've re-read this several times thinking I've read it wrong.  Let me see if 
I've got this right.

- You have TX from the PC hooked up to RX on the kickstart board and RX on 
your board.
- You have RX on the PC hooked up to TX on the kickstart board.

Is this the only way you have tested it?

If you haven't run your board alone, I suggest you do so because the 
symptoms you are reporting are exactly what I would expect from this 
hookup.  As long as the micros don't have to do anything (or the kickstart 
is slower than yours) they will stay in sync.  As soon as  your micro takes 
longer than the kickstart to perform an operation it will receive a command 
before it is ready for it and .....

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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