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C6424 HPI Access

Ram R
Intellectual 420 points

Hello

We have 2 C6424s connected via EMIF (master) and HPI (slave), per spruem7b.pdf and spruem9a.pdf. I'm having a bit of trouble getting HPI accesses to work...

Could you (TI) please send me a snippet of (pseudo-)code to exercise the slave via master-CPU/DMA read/writes?

Thanks!

  • 0
    TI__Guru* 84110 points

    Ram,

    Since no one replied to your post this week, it looks like no one has a code snippet they think would help. But we can see if there is a way to help you make some progress. Have you found any more information on your problem in the days since this post?

    Do you have CCS emulation connected to both DSPs? This will be a key tool for debugging your problem. Also, you will want to have a logic analyzer on the bus or at least a multi-channel oscilloscope.

    From studying the two User's Guides that you mentioned above, you know how the interface is supposed to work. For debugging, you will want to write and then read the control word to make sure the hardware interface is working correctly. If you can write the correct value and read back the correct value, that will mean a lot for your success, and you can start debugging the address and data parts of the interface. If you are not able to write and read the correct control word, then you will need to concentrate first on the electrical interface and wiring between the two DSPs.

    Regards,
    RandyP

  • 0 in reply to RandyP
    Intellectual 420 points

    HI Randy

    Thanks for your response. I had to shelve this for a few days to look at other things...

    Back on it now. Will post an update soon.

    -ram