DDR and DDR2 as a main memory

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What error messages are you getting, what are you trying exactly, does something hang or error out or get a warning?

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On both of boards i do not get any message.I mean i can not start debug.

Message, i get when i am trying to start is:

using cable "usb-blaster [usb-0]", device 1, instance 0x00

pausing target processor: not responding.

resetting and trying again: failed

leaving target processor paused

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Where are your reset and exception vectors pointed to?

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Now Reset vector and exception vector are pointing to DDR memory. Now i do not have in my design(temporary) EPCS memory.

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Does you system come out of reset?

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Yes

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Do you have valid clocks everywhere they are used?

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I am pretty sure, that YES.

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Does the DDR pass calibration?

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I do not know. What is this DDR calibration and how to perform it, if i need/must?

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Have these boards been tested or worked with other designs, just not with your

current design?

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One of the boards(the board whit DDR and not with DDR2) is working with other design, and the second one - i didn't see him working.

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Have you tried to run a simple hello world program running from ddr?

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For design with DDR I am trying simple "Hello word" application ONLY and it does not work.

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Have you tried to run a simple hello world program with a nios system not connected to ddr just to verify you have working knowlege of the nios ide and that your board generally works?

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One of the boards(the board whit DDR and not with DDR2) it is working great, but for second one ,as i said before - i didn't see him working.

Thank you,Kevin.

Slava.