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Altera_Forum's avatar
Altera_Forum
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16 years ago

the problem of programming the PCIe pex_exmaple_design

Hi everyone, I'm trying to program a stratix ii gx . According to the user guide,i used two pcs connected by the usb blaster to download the pex_example_design which generated by the pci_expre...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Hey,

If you have top-level pins you have not assigned yet, make sure they are not being assigned by the fitter to pins connected to the PCIe slot. Try disconnecting and grounding the transmit pins. From here it mostly depends on what interface you are using. I use DDR with an Arria GX, and the cpu boots and the core is recognized by the command "lspci" as long as I assert the acknowledge pin on any incoming requests. I think for Avalon ST you have to be sure to assert the ready pin on the transmit ST interface. Oh, make sure your resets are handled correctly, according to the compiler guide in chapter 5: signals. Does any of this help?