Code runs slower on JTAG

Hi,

it appears funny but interesting. I am debugging a problem and for
which I am using TRACE32 JTAG interface on ARM platform. But when I try
to run system without attaching JTAG it crashing where as at the same
time once i mount it on JTAG it runs smoothly

I observed that JTAG introduces some delay so i introduced some delays
at specific locations but still it is same ...

Anybody came across such problem .. your views will be really helpful

Regards 
Wrongmove

wrongmove wrote:
> I observed that JTAG introduces some delay so i introduced some delays
> at specific locations but still it is same ...
Are you using any output to the term.view in trace32, that usualy gives a
lot of delay.

-- 
Med venlig hilsen/mojn/regards
Martin Hansen
Center for Software Innovation
Stenager 2, DK-6400 S�nderborg, Web: www.cfsi.dk

"wrongmove" ...

> it appears funny but interesting. I am debugging a problem and for
> which I am using TRACE32 JTAG interface on ARM platform. But when I try
> to run system without attaching JTAG it crashing where as at the same
> time once i mount it on JTAG it runs smoothly

Now what is it, "code runs slower" or "system crashes"?

You do have the JTAG lines properly pulled up and down with resistors so
TMS=1 and nTRST=0 when the JTAG is not connected? If not, that could cause
this problem.

Regards,
Arie de Muynck

Where can we find interfaces to JTAG? i am trying to configure Virtex
-II FPGA w/out using any softwares. The project requires me to write my
own software in C to download the bit file to the device.. what kind of
interfaces are needed for this.. i am using Windows as a platform

found a problem .. following error was causing problem

int* res = 0

.....

res = 25;   /*Magical line causing this problem */

.....