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Altera_Forum
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12 years ago

Link to SRAM Qsys Tutorial 8 Bit sought

Hmm like many others I'm stunned at how difficult it is to add an SRAM component to a NIOS system. Two days and so far all I can get is a mishmash of signals that seem to bear no relation to...
Altera_Forum's avatar
Altera_Forum
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12 years ago

An Update - please if anyone has any extra information - I am really trying hard here but no joy.

I have tried three different methods each with the same (or similar) result - Address lines working away fine when running a small test C program writing to the correct memory locations.

But no data writes occurring. No activity on the Tristate Data bus lines.

Here are the images from two of the attempts I have made - one using the Generic Tri contrller and the other using a VHDL with Avalon Slave.

At present I do not have a ram chip installed I just want to see the data lines move on my scope.

I haven't put the instruction line onto the RAM for this reason - and so I'm running the etst program from internal ram.

Any ideas welcome. Am I running into problems because I have this all in a schematic whereas most examples seem to stop at the system level?

Can I test the ram lines using the COmmand console without having a ram installed?