Adding ssram to NIOS

Hello Andreas!

Thanks for your reply!

Here is a report (http://passworld.co.jp/forummsp430/viewforum.php?f=18) of what I did. The first tutorial works fine, the second one

will certainly work as soon as I can solve the SSRAM clock problem.

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Hi,

I think you just have to put a clock signal with apropriate frequency (same frequency as defined in sopc) on this pin.

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Yes, I know that, but my problem is simply: how do I do that?

I know from many sources (schematics, other sample programs, etc) that the clock

has to be wired to PIN_A9 (as far as I remember correctly) and that the SSRAM

clock has to be wired to PIN_A2. When I added the NIOS processor in SOPC builder,

the clock signal was automagically generated and could be found in the "*_inst.v" file.

Now in pin planner, I have assigned the clock pin to A2 and it works (the first tutorial

works).

Now I canot assign the clock to A9. Not in pin planner anyway, because in this case

SSRAM will have a clock, but NIOS will have no clock anymore.

I suspect I have to create a new node (for instance ssram_clk), and use one of the

tools to make a bridge from sysclk (input) to ssram_clk (output).

So in short: how would you do that?

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Follow the advices in this thread:

Damn, I can´t post links so use google and take the first hit. Google for:

"Problems with pin assignments with Cyclone III starter board"

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Yes, in the meantime, I found the solution, and there is an extensive

explanation in my "Tutorial 2-1: NIOS + SRAM" in the link above.

Thanks!

Pascal