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Dzar's avatar
Dzar
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Suggestions for Debugging HPS MAC issues?

I am using EMAC0 in a Cyclone V HPS system. On a development board with a similar device (not exactly the same package, but a dual-core ARM Cyclone V part nonetheless) I can set up the MAC/PHY (same ...
FawazJ_Altera's avatar
FawazJ_Altera
Icon for Frequent Contributor rankFrequent Contributor
7 years ago

Hello Dave,

We can debug through DS-5, by reading registers, or through signaltap. There is no specific approach to debug EMAC.

Thanks

Dzar's avatar
Dzar
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

I guess I don't fully understand this. I am looking at the MAC registers in DS-5, but that's not a low enough view. I send seven ARP packets, and see one or two packets received, both with one or more errors (CRC/Alignment/etc.). That's not enough information, I don't think. My logic analyzer and scope show a very nice looking ARP packet going to the FPGA, so why such errors at the MAC?

Are you suggesting there is a way to get internal information from the MAC with Signal Tap? Is this documented? I've never seen that.

Thank you,

Dave