Honored Contributor II
05-27-2017 08:17 AM
I used Cyclone V GX PCIE Hard IP with Avalon-ST interface, I don't use Qsys to generate the PCIE core, but use the IP catalog in the project.Now I can receive the correct memory read data from PC, and send the correct data to PC by cpID TLP. But the PC can not receive any data when I send by the DMA with either 3 header aligned TLP nor 4 header aligned TLP. I have used the logic analyer to capture the DMA address which the PC send, and the address I send to PC in DMA is correct. Does it need to enable some signal to open DMA function or need to adjust some signal before starting DMA? Please send me a example of DMA tx of Cyclone V GX PCIE Hard IP with Avalon-ST interface but without Qsys. Thanks very much!!!