Lpc2000

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@...>
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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