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Two Questions about SRIO boot load mode in C6455

xian zhang76757
Prodigy 115 points

First , put the slave DSP in boot load mode, the host DSP send the code to the slave DSP through NWRITE packets. The question is I donot do anything to the slave DSP ,including the expoling the system and intilizeing the device, but the slave DSP can excute the code . I want to why , the steps in the datasheet are not all necessary?

Second, after the slave is srio boot loaded, it cannot be srio boot loaded any more. I think I must reset the slave DSP , but the slave DSP donnot have a PCI interface. In this occasion, how can I reset the DSP ? Or, there is another reason that the slave DSP cannot be srio boot load again?

  • 0
    TI__Guru* 84110 points

    xian zhang,

    First, it sounds like you are able to boot load the DSP and execute the code. I do not understand why you have concerns with this if it is working. All of the steps in the datasheet are necessary, although I am not certain what steps in the datasheet you are referencing - I did not find these. The document that describes the boot modes is the Bootloader User's Guide, which may be what you meant. The steps in this document are required unless otherwise stated.

    Second, the boot process occurs at reset and not after that. The boot process is only repeated after another reset. This is the defined behavior of the device. Your SRIO master can always write new program or data to the slave C6455, but it must be careful to avoid interfering with the operation of the C6455 while it is running.

    Why do you want to boot load again?

    Regards,
    RandyP

     

    If you need more help, please reply back. If this answers the question, please click  Verify Answer  , below.

  • 0 in reply to RandyP
    Prodigy 115 points

    I think a boot mode should be support another boot without cutting off the power supply.

    Can I conncet with you by just replying the email or I must have to reply in the community?

    As I said before, the slave DSP was not enable to PCI interface, the only way the master DSP connect with the slave DSP is to send maintence packets. In this occasion, how can I put the slave DSP to the reset state?

  • 0 in reply to RandyP
    Prodigy 115 points

    Thank you very much for your answering !