Anyone measured the SPI timings between a Duet3 and a RPi?
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I'm trying to get an idea of how fast the RPi can actually shuffle data across the SPI bus at a 1MHz clock frequency. I'm playing with my Jetson Nano and I'm seeing an interval between bytes of about 150us. That seems a little long and I can adjust it but it would be good to know what the RPi does and what the Duet3 can handle.
Chan 2: MOSI
Chan 3: CLK
Chan4: CS0 -
There is some timing info mentioned in this thread (I thought I'd seen more about spi speeds, but couldn't find it just now)
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@bearer Yeah don't see anything relevant.
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If 1-5Mhz and up to 30 full frames/sec doesnt help hopefully this does
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@bearer "Frame" is a nebulous term
Is "Time" per division or for the window and what was going on at the time, just housekeeping?
Think you could get a capture while sending a large gcode file to the Duet3? -
Hehe, I defer to the almighty creator for the terminology:P
Time is per division yeah. Realized after I'd squared it away you did your capture at 25us, and I did the one I was hoping would be a close match at 20ms
Not sure what it was doing, the first few frames at boot. Might find the time to set it up later, will post back if I do.
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@bearer No worries! Don't go to any trouble. I was just curious.
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Is this where I say trouble is my middle name?
