01-04-2019 05:25 AM
I have instantiated the PCIe example design on the ZC706 board and debugging via ILA. I was able to see the Xilinx PCI device 7024 on the host upon lspci enumeration. But now (with no change to the design, but just repowering the setup), lspci does not show the xilinx core on the list of PCI devices. Also, the user_lnk_up is static to '0' and pl_ltssm_state is stuck to "00100". Any thoughts on where to debug next?
01-04-2019 09:58 AM
I find pl_ltssm_state is a 6-bit signal with 7-series Gen2 hard block. Can you let us know the 6-bit value on pl_ltssm_state signal?
01-04-2019 01:37 PM
I believe you meant 0x08 --> "001000". This is "8: Polling Compliance, Send_Pattern"
When you repower the setup, do you follow the steps below? If not, can you try this sequence?
1. Keep the host machine powered OFF
2. Program the FPGA
3. Power on the host machine