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Altera_Forum
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15 years ago

Tristate bridge can't read data

I have a problem with a tristate bridge which intefaces between Nios and a few ram devices external to the sopc system. I can correctly write data to the devices but I can't read anything: reads a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi Daixiwen,

The same configuration always worked in the previous project, and I changed it recompiled a lot of times in the past.

Now I simply copied that project, changed something not related to the bridge and recompiled for a new hardware.

Moreover the current target has a better speed grade (-6 vs -8), so I expected it would be even less critical. Am I right supposing this?

I will now follow your advice and I'll try to increase the wait states, in order to test if the problem is here.

Regards