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esp32/machine_bitstream: Reinstate bitstream bit-bang implementation.

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The bit-bang implementation was replaced with the RMT implementation in
599b61c086.  This commit brings back that
bit-bang code, and allows it to be selected via the new static method:

    esp32.RMT.bitstream_channel(None)

The bit-bang implementation may be useful if the RMT needs to be used for
something else, or if bit-banging is more stable in certain applications.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2022-01-11 17:21:14 +11:00
parent e754c2e84f
commit a3bbd5332b
5 changed files with 119 additions and 9 deletions
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docs/esp32/quickref.rst
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@@ -573,6 +573,9 @@ For low-level driving of a NeoPixel::
400kHz) devices by passing ``timing=0`` when constructing the
``NeoPixel`` object.
The low-level driver uses an RMT channel by default. To configure this see
`RMT.bitstream_channel`.
APA102 (DotStar) uses a different driver as it has an additional clock pin.
Capacitive touch