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Also found a race condition between timer_disable and redraw, which
would happen if I debugger-paused inside common_hal_rgbmatrix_timer_disable
or put a delay or print inside it. That's what pausing inside reconstruct
fixes.
So that the "right timer" can be chosen, `timer_allocate` now gets the `self`
pointer. It's guaranteed at this point that the pin information is accurate,
so you can e.g., find a PWM unit related to the pins themselves.
This required touching each port to add the parameter even though it's
unused everywhere but raspberrypi.
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Among other things this fixes a problem with blanking the display
and Closes #3664.
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this is compile-tested on
stm32f405 feather
matrixportal
nrf52840 feather
but not actually tested-tested.
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This brings in the following, and updates us to the 1.0.4 release tag:
Submodule lib/protomatter 2a1ba8fa4..5f07ec618:
> Bumping version for release
> Merge pull request #21 from makermelissa/master
> Merge pull request #20 from makermelissa/master
> Merge pull request #18 from jepler/fix-cpy-3184
> Merge pull request #14 from hierophect/cpy-timer-allocator
We previously had the _changes_ of jepler/fix-cpy-3184 and
hierophect/cpy-timer-allocator but not their merge commits.
The only other changes in protomatter were one formatting change in the
core, plus several Arduino sketches. So this should make no practical
difference for CPy.
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e.g., allocating a 192x32x6bpp matrix would be enough to trigger this
reliably on a Metro M4 Express using the "memory hogging" layout.
Allocating 64x32x6bpp could trigger it, but somewhat unreliably.
There are several things going on here:
* we make the failing call with interrupts off
* we were throwing an exception with interrupts off
* protomatter failed badly in _PM_free when it was partially-initialized
Incorporate the fix from protomatter, switch to a non-throwing malloc
variant, and ensure that interrupts get turned back on.
This decreases the quality of the MemoryError (it cannot report the size
of the failed allocation) but allows CircuitPython to survive, rather
than faulting.
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Testing performed: on stm32f405 feather, all pins change in plausible ways
on a logic probe. Didn't actually drive a display yet.
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