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WIP use more low-level API for control transfers #18

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WIP use more low-level API for control transfers #18

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tlyu
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@tlyu tlyu commented Nov 25, 2022

Working proof of concept. This is kind of mixed up with trace logging code for now, but I'll clean it up in a bit.

Drawbacks include some stricter constraints on the callers of USBCore_::recvControl: the destination can't be of automatic duration, and the call will complete before the read actually occurs.

@tlyu tlyu force-pushed the wip-moar-ll branch 2 times, most recently from 75ca72f to 95ab0e5 Compare November 25, 2022 22:50
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tlyu commented Nov 27, 2022

On further reflection, maybe we should rename recvControl if we're going to choose this approach. The resulting API behavior is really different from the stream-based API of the AVR Arduino core. In particular, the destination buffer for the receive isn't filled until some unknown time after the recvControl call returns.

@tlyu tlyu mentioned this pull request Nov 29, 2022
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obra commented Nov 30, 2022

For 3988c50, can you update it to talk about the why of the changes?

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tlyu commented Nov 30, 2022

For 3988c50, can you update it to talk about the why of the changes?

Done. I also took a closer look and decided that some of those changes were fine after all (avoiding changing a disabled endpoint). The change that really needed to be undone was only clearing the halt condition if the endpoint status was set to STALL.

@tlyu tlyu force-pushed the wip-moar-ll branch 4 times, most recently from 80bc571 to 2629cf2 Compare December 1, 2022 21:12
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tlyu commented Dec 1, 2022

This is almost in a state suitable for use in an experimental snapshot. I've conditionalized the trace logging under -DUSBCORE_TRACE, so it won't slow things down when used with Chrysalis.

@tlyu tlyu force-pushed the wip-moar-ll branch 11 times, most recently from 750f349 to 9128955 Compare February 24, 2023 21:08
@tlyu tlyu force-pushed the wip-moar-ll branch 2 times, most recently from 9bc76df to e3f8643 Compare March 6, 2023 23:52
@tlyu tlyu force-pushed the wip-moar-ll branch 4 times, most recently from e7d070d to a5ba581 Compare March 15, 2023 01:44
@tlyu tlyu force-pushed the wip-moar-ll branch 5 times, most recently from 75ff8f6 to 9bd4db9 Compare March 17, 2023 01:30
@tlyu
delay clearing WKUPIF
3725203 
This prevents some spurious wakeup interrupts. Mostly, it helps keep
debug counters looking reasonable given what's actually happening on
the bus.
@tlyu
add USB error logging hooks
f654a44 
Add error logging hooks for USB. This is conditionalized on
-DUSBCORE_ERROR_HOOKS, because they can cause slowdowns in USB
environments with lots of errors.
@tlyu
add USB debug counters
4ac879b
@tlyu
WIP timeouts
38289e7
@tlyu
WIP don't wait for USB config
6d2cd34
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@tlyu @obra