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Lpc2000

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Message

Re: trouble programming our prototype board w/ lpc210x ISP

2004-01-03 by bclapper29

Yes. We definitely had P0.14 pulled low while programming. We tried 
various combinations of things but primarily it included (1) supply 
power to the device, (2) pull P0.14 (pin 44) low, (3) toggle RST.

We lucked out twice with this process and successfully loaded a small 
program which toggled some LEDs. We feel reasonably confident that we 
were able to get the device into 'ISP' mode, because when we'd supply 
the power, the program would run, then after pulling p0.14 low and 
toggling the RST pin, the program would stop executing.

Originally, we just let the RST pin float.... then changed that after 
reading in the manual that we could also get the LPC in ISP mode when 
pulsing RST after pulling pin 44 low. 

... as Leon suggests, maybe we've got a bad solder connection 
somewhere. We did test all pins involved individually.

Thanks,
Bryan

--- In lpc2100@yahoogroups.com, Robert Adsett <subscriptions@a...> 
wrote:
> One other thing I haven't seen mentioned here yet.  You do have 
P0.14 
> pulled low when you are programming?
> 
> 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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