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Altera_Forum's avatar
Altera_Forum
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15 years ago

PCIe freezing

Hi, I have strange problem with PCIe IP. I have a custom board with ArriaGX and PCIe instantiated using MegaCore flow with AvalonST interface. The PCIe works (there are some DMAs running, targe...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi Matthias,

right now I have simplified everything that is possible - the FPGA design now consist only of PCIe IP and some virtual pins - rx_ready is '1', rx_mask is '0', there is some reset logic, interrupt and msi are '0', and the tx side is grounded also.

PC detects my device and I am able to write to it. The driver is now just a "skeleton driver" that only connects to my device and then writes to to it, nothing else. After the write sequence is started, the PC freezes - sometimes it does it immediatelly, sometimes after a few seconds.

I will add some detection logic for detecting non-posted requests, if there is a need to answer to some request, also I will create a detector for the error condition from the very beginning of this post. But after that I am stuck.

This is already the simplest design that I can make - there is nothing more left to put away and it still freezes... Do you have any simple design that has only the Soft PCIe and some driver that communicates with it that you could share with me? Or do you know about any that I could use? Maybe there could be some problem with the hardware...

Martin