Lpc2000

--- In lpc2000@yahoogroups.com, Robert Adsett <subscriptions@a...> wrote:
> At 06:48 PM 1/8/05 +0000, you wrote:
> >On the subject of feeling the need to try to program above
> >38400...we've got >200K of Thumb code and thousands of chips to ISP in
> >the future...I know it will make a difference to our to our PCB
> >subcontractor.
> 
> Yep for high volume it will make a big difference.  It might be
worth your 
> while to bootstrap to a higher baud rate.  It's something I've been
meaning 
> to work on when I get some time.  The idea is the initial ISP would 
> download a a small download program to RAM and run it.  It would
then set 
> the serial port to a higher baud rate and use a binary download 
> protocol.  The higher might get you a factor of 3 (if you can match
rates 
> closely enough), the reduced overhead of the binary protocol would
get you 
> a factor of 2.  All this minus the actual programming overhead and
the time 
> to download the initial stub.
> 
> Another option in volume might be to get the parts preprogrammed
(assuming 
> they run identical programs).  That gets it out of your
subcontractors way 
> entirely.
> 
> For a lot of the stuff I've done functional testing made the
programming 
> time disappear into the noise.
> 
> 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.

I'll take a look next week on the actual data quality being received
transmitted at the CPU. I agree with you, from the table in the user
manual for the LPC2106 you can run at 115200 at 12.288 MHz, so at
12MHz even though we'll probably have a small percentage error per
bit, we should still be OK.

Jane