SPI clock and data

I’m using the Logic Pro 8 to look at SPI signals. On a scope, the clock is correct. I see 6 bytes clocked out as expected. On the Logic Pro 8, nothing looks right. The clock isn’t even close. I see 4-6 pulses that look random. It feels like a setup/tool issue but I can’t find anything that would seem to fix the problem. Any ideas?

See this post for some ideas:

Specifically:

… as well as:

  • Check analog vs. digital view and confirm waveform/signal quality
  • Check sample rate(s) are fast enough
    (Target: 10+X the SCLK frequency)
  • Check ground connection(s)
    (Suggest SCLK channel on SPI as it’s highest frequency signal)

Hope that helps!

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