Lpc2000

Hi Martin,

Is it a positive pulse? or negative?

.. Thanks for your help,

bryan




--- In lpc2100@yahoogroups.com, capiman@t... wrote:
> Hello,
> 
> two hints:
> 
> 1) Please restart the ISP software on PC after each trial. Bug ?
> 2) You need a reset pulse on RST, not a constant level !
> 
> When you don't use the ISP, but instead use a terminal programme,
> you can send a '?' at any baudrate (i use 115200, 8N1) and when 
everything
> is correct,
> LPC should answer with "Synchronized" once (!). After this the '?' 
is echoed
> back to PC.
> When you reset LPC again, it answers again once with "Synchronized".
> 
> Hope it helps,
> 
>       Martin
> 
> ----- Original Message ----- 
> From: "bclapper29" <clapper@d...>
> To: <lpc2100@yahoogroups.com>
> Sent: Friday, January 02, 2004 9:57 PM
> Subject: [lpc2100] trouble programming our prototype board w/ 
lpc210x ISP
> 
> 
> > We are working on a prototype board of our product with the 
LPC2105.
> > When we try to flash our program, we are getting an error "can't
> > communicate with test board". We have a serial cable connected to 
the
> > Uart0 ports (pins 13, 14) through a MAX3232 converter.
> >
> > On the test board side, we have verified that the VDD3.3 and 
VDD1.8
> > and GND are all connected correctly. RST is tied high and pin 44
> > (P0.14) is tied low (to enable flash program mode). We checked to
> > make sure the oscillator is operating correctly - it is.
> >
> > We, of course, have checked and rechecked that Tx and Rx are
> > configured correctly from the pc to the test board.
> >
> > I'm wondering if anyone has encountered any issues when 
programming
> > the LPC that might be helpful for us to solve our dilemma? Is 
there
> > something missing?
> >
> > Also, the other thing that we are confused about is when the flash
> > programming utility gives us an error, we can't see any activity 
on
> > either the Tx or Rx lines. We put a scope on those pins. How can 
it
> > know whether or not it can connect to the test board, if it 
doesn't
> > communicate to it?
> >
> > Any help would be greatly appreciated.
> >
> > Thanks,
> > Bryan
> >
> >
> >
> >
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> >
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> >
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> >