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Re: [lpc2000] Re: Strange ISP Problem

2005-01-25 by Robert Adsett

At 04:36 AM 1/25/05 +0000, you wrote:
>Yes, have tried several different computer with different COM ports.
>At school today I have had access to an oscolliscope and found out
>that the philips program is sending out a string of question marks
>trying to get the chip to respond with Synchronized, but the chip just
>sets there.  However on the same computer and COM port I can fire up
>HyperTerminal send a single "?" and get the Synchronized response as
>expected.  Still at a loss here, can't figure out what would cause this.

Have you tried a different cable?  This is the kind of thing I've seen with 
intermittent connections (cold solder joint, lead sitting on pad w/o 
solder, a broken wire that makes contact as long as the cable sits just 
so).  Also are you using the appropriate power supply for your level 
translator (not running a 5V chip on 3.3V)?

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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