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Refactor IOStreamer and QSPI#700

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+1,381-298

Commits

Commits on Sep 22, 2024

• gateware.iostream.IOStreamer: add support for sample delay

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• QSPIController: add support for passing sample delay to IOStreamer

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• Reapply "gateware.iostream.IOStreamer: fix bug for incorrect sampling DDR inputs"

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• IOClocker: fix driving/sample half cycle earlier bug

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• QSPIController: fix wrong edge sampled when divisor==0

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• QSPIControllerApplet: auto-calculate default sample delay

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• added sample delay tests

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• test_iostream: refactor input sample tests so they can be reused

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• test_iostream: sdr input sample test: use any edge to signify sampling

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• gateware.iostream.IOStreamer: fix same-cycle skid buffer push/pop

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• test_iostream: improve docstrings

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• test_iostream: refactor sampling to make it use .sample()

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• iostream ddr testcase: remove glitch mitigation, because new version of SimulatableDDRBuffer is glitchless

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• gateware.iostream.IOStreamer: let o_stream transfer if i_stream not rdy

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• Refactor everything around IOStreamer, and QSPIController

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