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| author | Damien George <damien@micropython.org> | 2022-01-11 17:21:14 +1100 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2022-01-14 16:40:01 +1100 |
| commit | a3bbd5332bff0a67204196d2e365ad10ff773d58 (patch) | |
| tree | b244f384ac3160c554ebaede573ac51c1c9b47d7 /docs/library | |
| parent | e754c2e84f1845313411a68c26821d613e66934e (diff) | |
esp32/machine_bitstream: Reinstate bitstream bit-bang implementation.
The bit-bang implementation was replaced with the RMT implementation in
599b61c08687ca077e3b0e115d5b76affcc673ca. 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>
Diffstat (limited to 'docs/library')
| -rw-r--r-- | docs/library/esp32.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/library/esp32.rst b/docs/library/esp32.rst index e3c25d265..ff1c99a55 100644 --- a/docs/library/esp32.rst +++ b/docs/library/esp32.rst @@ -250,6 +250,17 @@ For more details see Espressif's `ESP-IDF RMT documentation. new sequence of pulses. Looping sequences longer than 126 pulses is not supported by the hardware. +.. staticmethod:: RMT.bitstream_channel([value]) + + Select which RMT channel is used by the `machine.bitstream` implementation. + *value* can be ``None`` or a valid RMT channel number. The default RMT + channel is the highest numbered one. + + Passing in ``None`` disables the use of RMT and instead selects a bit-banging + implementation for `machine.bitstream`. + + Passing in no argument will not change the channel. This function returns + the current channel number. Ultra-Low-Power co-processor ---------------------------- |