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Two DSPs in a one chain -Problem (pleas refer to image)

Elric
Expert 1250 points

We have two DSPs in a one chain, in our board.

Currently we setup the code composer as one DSP and one bypass. When we connect to the DSP that we setup, it runs correctly. While this DSP continues to run, we change the bypass and the DSP from code composer setup, so that our active DSP is the other one. We can connect without a problem in this way. However, after we load the code and start to run, it gives an error and disconnects. Apperantly it seems this problem is born when we run the two DSPs together. Do you have any idea why or what should cause this problem?

Note: Our emulator is  xds510usb emulator.

Thank you in advance,

Erman

  • 0
    Expert 1250 points

    We were able to correct the previous problem. But still we can not setup two DSPs together without adjusting one of them as bypass.

    You may enlarge the image by opening it in a new tab. The area within red mark is our setup. We created it referencing the setup of evmdm6437. The below setup is the one that works, one DSP is in bypass mode and we can only connect the one DSP we defined. Is there anything wrong in our setup? Any suggestions?

     

     

     

  • 0 in reply to Elric
    TI__Mastermind 41665 points

    You should be able to connect to both devices like shown in your red encircled configuration, it looks correct to me. Unfortunately I do not get to work with many multi processor boards so I have not used this sort of configuration much myself, however the C6455 EVM is setup like that with two processors and it allows you to connect to both properly, I just tried it out myself, below is the config.

    Just as a long shot it may be worth updating your emulator's drivers and perhaps CCS service pack, beyond that you may want to check how your JTAG schematic is done.

  • 0 in reply to Bernie Thompson TI
    Expert 1250 points

    I was away, looking to some matters other than DSP.

    These are (this one and the one about vpbeclk clock voltage) very satisfactory answers. Thanks Bernie and Juan.