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Altera_Forum's avatar
Altera_Forum
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14 years ago

Modifying QSys PCIe reference design to have dual port OCM

Hi everyone, I am trying to modify the QSys PCIe reference design (AN431) for a Cyclone IV Starter Kit equivalent. The reference design works on my board after I modified the pin mappings ...
Altera_Forum's avatar
Altera_Forum
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13 years ago

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Hi everyone,

I am trying to modify the QSys PCIe reference design (AN431) for a Cyclone IV Starter Kit equivalent.

The problem is DMA transfer now is intermittent and fails on occasion. The smaller the transfer size, the higher the likelihood of success. When it succeeds, the transfer takes place at the full speed that it did prior to modification.

So, my question is, why is it failing and what can I do to fix this?

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Hello, serendipity!

Did you find the cause of Your problem?