C6678 NETCP and subsystem

Mike Pooley

I have an EVM card using a 320C6678.

I can correctly read the DSP Device ID and MAC address from the addresses quoted in the datasheet (0x02620018, 0x02620110, and 0x02620114).

Using the same method I am trying to read the NETCP and subsystem registers at 0x02000000, 0x02000100, 0x020000200, 0x02000300, 0x02000800.

The value from 0x02000000 is 47a8030b, which is not per the datasheet and the other three addresses all return 0.

I haven't done any other preparatory setup, I am just trying to read registers to convince myself I can access the parts of the processor that I think I am.

over 13 years ago

0 ArunMani over 13 years ago

TI__Genius 9915 points

Hi Mike,

by default the PA sub system is shutdown. That might be the reason you are seeing these values. Run the gel file for the evm and then try out.

Thanks,

Arun.

0 Javier Malave-Bonet over 13 years ago in reply to ArunMani

TI__Expert 5805 points

Hi Mike,

I suggest first going over the NetCP, PA, SA and GBE user guides. Links below in the same order.

http://www.ti.com/lit/ug/sprugz6/sprugz6.pdf

http://www.ti.com/lit/ug/sprugs4/sprugs4.pdf

http://www.ti.com/lit/ug/sprugy6/sprugy6.pdf

http://www.ti.com/lit/ug/sprugv9a/sprugv9a.pdf

Address 0x02000000 is the first mailbox register associated to statistic values from PDSP0. These should read 0 by default right after enabling the power and clock domains. So, I agree with Arun that this might be your first issue. Now, the other address don't point to any register in specific. These are reserved locaitons with no registers. Please look at the User Guides for the proper register mapping.

Regards,

Javier

0 Mike Pooley over 13 years ago in reply to Javier Malave-Bonet

Prodigy 50 points

I had looked through the user guides but I had missed an offset. The NETCP (which contains the Gig ethernet etc) starts at 02000000. I had missed the offset in the NETCP user guide which offsets the Gig ethernet by another 90000. I now get the published register contents.

Thanks guys.

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C6678 NETCP and subsystem