Honored Contributor
Honored Contributorthank you for your help,
I succeeded in using the mSGDMA devices, in a loopback demo. My understanding is the new TSE driver suite that comes in a BSP requires mSGDMA devices, no longer SGDMA. So now I got something that should be fairly close to what I want. I have a NIOS2 + TSE + two mSGDMA devices and a dedicated OCM for DMA descriptors. The point is I am trying to create a basic design to use the TCP demo application, now I can get the app to start but it is stuck at "Auto negotiation passed" and simply hangs there. The two NicheStack tasks (tick & netmain) are both created. The MDIO interface seems to be working and the drivers seems to do the job. But then it requests a hardware reset, reinitiates a negotiation & just freezes. Any ideas what I might be doing wrong? I noticed on an online tutorial that what comes next is related to DMA devices, could that possibly be related to my OCM/DMA whatever SOC I did wrong? https://alteraforum.com/forum/attachment.php?attachmentid=15825&stc=1
Occasional ContributorHi,
I am trying to implement triple speed ethernet in Cyclone 10 FPGA. I have integrated triple speed ethernet core in platform designer in qsys. If i pump data and do loop back in system side of MAC, its working fine. I am able to monitor Start of packet, data valid, data, End of packet properly in signal tap. Now my aim is that i try to capture the streaming data in system side of MAC directly in Nios side memory. For this i am using Modular Scatter gather DMA. For receive data i am using one MSGDMA in streaming to memory mode and one for transmit data i am using one MSGDMA in memory to streaming mode. I try to capture data in descriptor memory in onchip ram. But i am not getting any data.
I have doubt about my connections of MSGDMA in Qsys.There are no any specific examples detailing how to use MSGDMA with TSE. Some people have done it with SGDMA . I am using quartus 18.1. So how to go about it. How to capture data in onchip RAM.
Kindly guide
Av
