Hi all,

I'm developing a pcb which uses the at91sam3s4b as main processor. I try to talk to it via jtag useing an olimex arm-usb-jtag dongle and openocd.
It is not working, the only response I get is that is finds the right chip ID. Using a osciloscoop I a signal on all relevant jtag pins (TDI,TDO, TMS and CLK), all digital io seems to be there. However I cant open a telnet session to localhost port 4444, I don't get a telnet prompt.
Does anybody have any suggestions?

I am not familiar with those tools, but if you can't telnet maybe the firewall is blocking that port.

Windows typically disables ports it does not know.

I've only recently started to use openocd (with a success, however ) but I do have an idea:
If you don't have your adapter_khz value set properly in a script, maybe openocd looses connection with the chip and it shutsdown? That might be the reason of your problems with connection to localhost 4444.

The problem is solved, the at91sam3 on my PCB was broken, on a new PCB everything works just fine