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Altera_Forum
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17 years ago

PCI Express-to-DDR2 SDRAM Ref Dsgn Locks up PC

Hello, I have an Arria GX PCIe Development Kit and I am having trouble running the PCI Express-to-DDR2 SDRAM Reference Design. Here are the steps I take, and here is the problem that occurs: ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

An additional note. After the 'DMA still pending' message box appears, the whole PC is locked up. The only way to recover is to manually reboot the system.

Another noticed behavior is after an undetermined amount of time, all registers go to 1's. For instance, all the configurations space registers viewed from SIIGXPCIE.exe go to 0xFFFF...

The same can be said for the DMA control registers. This event seems to occur at variable amounts of time, and even if no memory transactions occur (DMA or register). The 'DMA Still Pending' message box might be a side effect of everything being set to 1's and the DMA Still Active bit remaining high.