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Altera_Forum
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15 years ago

Trouble making networking work with National Semiconductor DP83848J PHY

I'm still working on getting networking going on my soft processor. I've made a lot of progress but currently have exhausted my ideas for troubleshooting. I'm hoping the veterans of the foru...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

So I had some success... I found some noise on one signal and changed some cabling and now I can transmit from my board out. When I ping from my board (running linux) I can clearly see the output in wireshark on my PC and my PC responding. But the replies are not seen by my board.

I then tried switching to an MMU-less design and testing under Micrium + HAL with their simple socket server. The simple socket server completes all MAC initialization steps and reports no errors. But again, when I attempt to connect no response for traffic inbound to my board.

So I either have a noise problem or a design problem.

I need to isolate the problem between noise, design, or driver. I think I can pretty well eliminate driver because I get the same behavior with Linux on MMU as with Micrium + HAL on no-mmu.

Any suggestions on what tools or techniques to isolate my problem?

David