Problem with Target connection

The problem seems to be with Nios II, not with your component. Check Nios configuration in sopc builder, in particular jtag debug settings.

Did you previously test your design without the custom component? Did it work?

Cris

Yes, the design is working without custom component. I tried to run different designs too and they are working fine.

Do I need to add some specific setting for jtag when I am adding my owm component.

I have kept the default settings for JTAG.

I tried to rebuild the whole design. Now it is showing following error:

Actual system ID not found on target at base address.

Mumble

Hi Mumble,

jtag default settings are fine.

Then you were right, the problem is with your custom component.

What type of connection does it have in sopc builder?

Does it have an avalon master port or anything else which could block Nios operation?

Cris

I am new to altera and don't know how to check it. kindly suggest.

Now I am getting different error:

Actual system ID not found on target at base address.

Even after removing the custom component.

Mumble

Hi Mumble,

Signal check:

I presume you can easily do it with the SignalTap feature. Anyway I'm quite new to Altera, too and I never used it because I worked more on software side; so I can't give you better hints than looking at the signaltap manual or some tutorial.

For what I've done so far on the hw side, it was enough the raw old method: connecting signals to be tested to some fpga spare pins and recompiling; you can do this if your design recompiles fast.

System id:

Have you any failing timing in Quartus?

If not, it could be that something of the previous configuration is still around. Have you rebuilt everything?

As a last option I'd suggest to create a new project from scratch, with the same source files.

Regards

Cris

Hi Cris,

Thanks alot for your help.

I tried to build whole project from the scratch and this time it worked without a single error :) . I don't know the reason for those errors, as I did exactly the same thing as before.

Thanks,

Mumble.

Hi Mumble,

I don't know. This simply sometimes happens when you start adding, removing, changing, etc. In all dev tools, not only Altera.

If you kept the old project and you want to discover more (possibly to avoid the same mistake in the future...) you can compare the project files and try to find out what's the critical difference.

Cris