Synchronize multiple boards with a pair of lvds

Discussion in 'VHDL' started by LilacSkin, Mar 21, 2008.

  1. LilacSkin

    LilacSkin Guest


    In order to synchronize multiple boards, I want to use a pair of lvds.

    All my boards are clocked with the same frequency, and when the
    master board receive a "trigger enable", I want it sends signals (with
    the pair of lvds) to the other boards in order to synchronize them.

    Do you have an idea how to do that with a state machine, I suppose ?

    LilacSkin, Mar 21, 2008
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  2. LilacSkin

    KJ Guest

    Is there some reason the obvious approach (below) won't meet some
    requirement that you left out of your post?

    Sync_To_Other_Boards <= Trigger_Enable;

    KJ, Mar 21, 2008
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  3. I suppose.
    I would also consider buying a core
    for one lane of pci express bus.

    -- Mike Treseler
    Mike Treseler, Mar 21, 2008
  4. Assuming it meets your data rate requirements I would use a simple biphase
    mark code for the inter-board data. This is trivial to generate and decode
    if you are willing to operate the link at, say, 1/16 the master clock speed,
    and it doesn't require synchronization or preambles like Manchester or
    differential Manchester encoding.
    David Spencer, Mar 21, 2008
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