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applet.interface.better_la: a more performant logic analyzer #490

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anuejn
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@anuejn anuejn commented Nov 15, 2023

This PR implements a more performant logic analyzer applet. Performance is still not great but much better than with the event analyzer based one.
It would be very nice to add DDR support for capture & maybe a faster capture clock domain for more accurate timing. However, it is unclear if that actually makes sense based on the short captures I am already getting with this. Maybe USB lag-spikes are the issue here, but that needs further investigations.

I am very happy to take any suggestions on the code style & would be happy to work on it so that this could one day live upstream since i believe that this would also be valuable to many other people

@anuejn anuejn marked this pull request as draft November 15, 2023 23:58
@anuejn anuejn changed the title More performant logic analyzer applet applet.interface.better_la: Add a more performant logic analyzer applet Nov 16, 2023
@anuejn anuejn changed the title applet.interface.better_la: Add a more performant logic analyzer applet applet.interface.better_la: a more performant logic analyzer Nov 16, 2023
@wanda-phi
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The loose fixes here look like they should be in their own PRs?

@whitequark
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Maybe USB lag-spikes are the issue here, but that needs further investigations.

They are and this is why compression is needed.

this implements dynamic priority based scheduling in the LAArbiter.
Also it does improvements on the host-side python
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3 participants