Lpc2000

We developed a prototype board with an LPC 2138 and JTAG interface. It
worked initially as I was able to program it using the IAR and JLINK.
After several reprogramming steps, the chip isn't responding anymore.
I see activity on output ports that are used by my application this
indicates the core seems to be fine. When I try to debug the
application in IAR, I get the error message: Received 0 as core Id. No
communication with core. I get the same error message using Segger
comandline tools. The chip doesn't respond to ISP commands. Is there
any way to erase the Flash completely?

I am having the same problem.  It has happened on 2 out of 5 boards so 
far.  I am using the LPC2131 and Keil ULINK.  I tried reprogramming 
with the Philips Flash Utility over UART0, but that doesn't even 
work.  Does it work for you?

Good Luck
Dave B

Yeah exactly. the bootloader doesn't respond either. We've only rolled
out 2 prototype boards so far and 1 was bad. It wasn't bad off the bat
but after a few debug cycles, it died. Do you recall exactly what you
did before running up to the failure? It must be something that I'm
doing wrong. I have the exact same program running on an IAR dev board
and it's debugging very well.

The only difference between our board and the IAR board is that we
have a buffer chip in between for protection so I'm sure the PC
couldn't have fried it.

--- In lpc2000@yahoogroups.com, "drb5599" <dbutler@c...> wrote:

> I am having the same problem.  It has happened on 2 out of 5 boards so 
> far.  I am using the LPC2131 and Keil ULINK.  I tried reprogramming 
> with the Philips Flash Utility over UART0, but that doesn't even 
> work.  Does it work for you?
> 
> Good Luck
> Dave B

sengoontoh,
It does sound like we have very similar situations.

This board I had reprogrammed via Philips Flash Utility several 
times.  The processor was running, I was measuring some temperature 
sensors and watching a PWM signal I was generating to control a 
fan.  I was spitting lots of messages out UART0 to my terminal 
(TERATERM) so I knew the processor was running correctly and my data 
was good.  

Then I "intentionally" pulled P0.25(AD0.4)straight to ground, it was 
tied to the output of an opamp thru a 100 ohm resistor.  I am using 
this ADC channel and wanted to see my program output change based on 
this situation.  Then it stopped.

I have not been able to do anything since.  However, I just 
discovered that pin41, the ISP line is always low.  My ISP circuit 
is identical to the MCB eval board, i.e. a 10k pull-up to 3.3V.  So, 
I tried everything to figure out why this line would always be low.  
The last thing I just tried was to lift the LPC2131 pin41 (ISP) off 
the board, now the ISP line is high.  So, it must be shorted in the 
chip?

I am going to look at my other board that failed and see if it's the 
same thing.  I can't image what caused that pin to blow??????

I guess, I will try and solder a new chip down and try to keep going.

-Dave




--- In lpc2000@yahoogroups.com, "sengoontoh" <sengoontoh@y...> wrote:
> Yeah exactly. the bootloader doesn't respond either. We've only 
rolled
> out 2 prototype boards so far and 1 was bad. It wasn't bad off the 
bat
> but after a few debug cycles, it died. Do you recall exactly what 
you
> did before running up to the failure? It must be something that I'm
> doing wrong. I have the exact same program running on an IAR dev 
board
> and it's debugging very well.
> 
> The only difference between our board and the IAR board is that we
> have a buffer chip in between for protection so I'm sure the PC
> couldn't have fried it.
> 
> --- In lpc2000@yahoogroups.com, "drb5599" <dbutler@c...> wrote:
> > I am having the same problem.  It has happened on 2 out of 5 
boards so 
> > far.  I am using the LPC2131 and Keil ULINK.  I tried 
reprogramming 

> > with the Philips Flash Utility over UART0, but that doesn't even 
> > work.  Does it work for you?
> > 
> > Good Luck
> > Dave B