Lpc2000

Hi everyone,
   
  I obtain the following message when i try to download the code with J-Link;
   
  "Could not identify firmware(identification string has length of 0)"
   
  or 
   
  "Received 0xFFFFFFFF as core Id.
  No communication with core"
   
  I checked all J-Link connections and LPC pins.
   
  I use;
  MCU :  LPC2131
  Comp:  IAR 4.30A
   
  I hope someone can help me.
  Have a nice day,
   

		
---------------------------------
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[Non-text portions of this message have been removed]

Serdar,

Your jtag speed is set too fast. The segger driver 3.10d will help a
lot. You can also set the speed to fixed at 1000, assuming your CCLK
is 12mhz or better. These are set in the JLink selection in Options.

Hope this helps

--- In lpc2000@yahoogroups.com, Serdar Demirdag <SerdarDemirdag@...>
wrote:
>
> Hi everyone,
>    
>   I obtain the following message when i try to download the code
with J-Link;
>    
>   "Could not identify firmware(identification string has length of 0)"
>    
>   or 
>    
>   "Received 0xFFFFFFFF as core Id.
>   No communication with core"
>    
>   I checked all J-Link connections and LPC pins.
>    
>   I use;
>   MCU :  LPC2131
>   Comp:  IAR 4.30A
>    
>   I hope someone can help me.
>   Have a nice day,
>    
> 
> 		
> ---------------------------------
>  Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, &
more on new and used cars.

> 
> [Non-text portions of this message have been removed]
>

--- In lpc2000@yahoogroups.com, "arm7dude" <arm7dude@...> wrote:
>

Thanks for your attention dude,
but your advice doesnt work at all..
I can programme the flash only twice and i dont know how..
Is there any thing else to do? 

Thanks for your help... 






> Serdar,
> 
> Your jtag speed is set too fast. The segger driver 3.10d will help 
a
> lot. You can also set the speed to fixed at 1000, assuming your 
CCLK
> is 12mhz or better. These are set in the JLink selection in 
Options.
> 
> Hope this helps
> 
> --- In lpc2000@yahoogroups.com, Serdar Demirdag <SerdarDemirdag@>
> wrote:
> >
> > Hi everyone,
> >    
> >   I obtain the following message when i try to download the code
> with J-Link;
> >    
> >   "Could not identify firmware(identification string has length 
of 0)"

> >    
> >   or 
> >    
> >   "Received 0xFFFFFFFF as core Id.
> >   No communication with core"
> >    
> >   I checked all J-Link connections and LPC pins.
> >    
> >   I use;
> >   MCU :  LPC2131
> >   Comp:  IAR 4.30A
> >    
> >   I hope someone can help me.
> >   Have a nice day,
> >    
> > 
> > 		
> > ---------------------------------
> >  Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, &
> more on new and used cars.
> > 
> > [Non-text portions of this message have been removed]
> >
>