emulation debug port fail

Hi all,
I'm developing device driver and using lauterbach to dowload image file to =
evaluation board.
One bad day, while I was downloading and Trace 32 notified: "emualtion debu=
g port fail"
at the line "sys.up".
I investigated and knew that there are 3 reasons may cause this error:
- wrong CPU
- wrong clock
- wrong JTAG pin

but those reason can not happen because I was using this board as usual.
Is there any one faced this error? could you please give me advices for thi=
s error.

Thanks,

Hi,

I have had this problem before,usually Trace32 and the board have lost com=
munication.

There are a few possibilities to try.

Restart Trace32 and reset (power off / on) your target hardware.

Take the system up and down on the Trace32 menu

Reset the board, and software connect Trace32

Also have a look at the Lauterbach web site

Hope this helps

Mark
Symbian

Hi
There are few more possible reasons for this problem
- when the multicore parameters are not correct
- when power source to CPU is not adequate e.g. battery not charged enough =
Or power adapter is not giving required power.

I had this problem for of all the above reasons but following reason was ve=
ry interesting..
I mistakenly connected the JTAG dongle to the side of Lauterbach box (podbu=
s in/out port) and powered it on but later realised my mistake and place th=
e JTAG cable back to the correct port even though I was getting "emulation =
debug port failed" error.=20


If nothing of this works then try with another lautebach box and/or JTAG ca=
ble. At times there are very misterious reasons for this failure that only =
Lauterbach knows.

Hope this helps

NV
Symbian