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SRIO switch between two C6678 EVM boards

Weiyi Tang
Prodigy 110 points

Hi,

I'm trying to make two C6678 EVM boards talk through SRIO. My question is: Can I directly connect the two without a SRIO switch?

If I do need a switch, where can I get a stard alone one? (My google search only shows SRIO switch chip)

I connect SRIO lane 0 of the two EVM boards with two "AMC SMA ULTRA 9000" boards (http://silicontkx.com/SMA-AMCULTRA9000.html) and SMC 4 cables, but couldn't make it work.

Thanks,

Weiyi

  • 0
    TI__Mastermind 42545 points

    You should be able to connect the SRIO of two C6678 EVM cards together using the Ultra9000 and SMA cables.  No SRIO switch is necessary. 

  • 0 in reply to Bill Taboada
    Prodigy 110 points

    Thanks a lot Bill. That confirms what I believe.

    More questions:

    1. I'm using lane 8 on Ultra9000 to do the connection, which I believe is lane 0 on DSP and works for external loopback. The connection is like this: (board1)tx+ => (board2)rx+, (board1)tx- => (board2)rx-, (board2)tx+ => (board1)rx+, (board2)tx- => (board1)rx-. Is this correct?

    2. If I run example code "SRIO_LoopbackDioIsrexampleproject" or "SRIO_LoopbackTestProject" on both EVMs, what kind of code changes do I need to make? What I have done are deviceID and mode (changed from loopback to normal). But it doesn't work. I can get PortOk, but register SP0_ERR_STAT goes to 0x30301 right after PortOk.

    Regards,

    Weiyi