Stratix IV Development Kit (DK-DEV-4SGX230N) - PCIe 2.x 128-bit Avalon-ST Endpoint

I have implemented a PCIe 2.x 128-bit Avalon-ST endpoint on the Stratix IV Development Kit.

I have so far been able to read the configuration space of the device; however, I have been unable to observe, via signal-tap, a write operation on the FIFO.

The FIFO is Avalon-ST (and packet) enabled. The *in_ready and *out-ready of the FIFO are both asserted, of which, means that the FIFO is ready to receive data from the PCIe core and its 128-bit Avalon-ST interface.

I am asking if someone can look over my IO connections for this particular development kit to make sure that I have all of the required clocks, controls, etc. setup so that the SERDES interface functions properly. I believe I do have it connected properly; however, I just need to bounce it off someone else. The documentation with-regards-to custom endpoint development, outside of the QSsys flow, is very limited; therefore, I may have missed a vital IO connection? If not, it must have something to do with my RTOS interface to the PCIe device. I have used this same RTOS access method on a 64-bit Avalon-MM endpoint implementation without issue.

Any feedback would be greatly appreciated!

Thanks!

Attached Files

• s4gx_gen2x4_assignments.txt (2.6 KB)