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Altera_Forum's avatar
Altera_Forum
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11 years ago

PCIe memory access trouble about CycloneV Avalon-MM Hard IP for PCIe

Hello. I develop a CycloneV board to communicate to external CPU by PCIe. So, I use the Avalon-MM Cyclone V HardIP for PCIe(quartus ver13.1). I try to read access from external CPU to...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

When you read back 0xffff_ffff, what you're actually getting is -1, which indicates that the read has failed. Are you sure you have all of the wires correctly connected, and they follow the user guide?

Also, if you just want to transfer data over PCIe, you should look at riffa.ucsd.edu