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esp32/esp32_rmt: Change RMT.source_freq() to class method.

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To create an esp32.RMT() instance with an optimum (i.e. highest resolution)
clock_div is currently awkward because you need to know the source clock
frequency to calculate the best clock_div, but unfortunately that is only
currently available as an source_freq() method on the instance after you
have already created it.  So RMT.source_freq() should really be a class
method, not an instance method.  This change is backwards compatible for
existing code because you can still reference that function from an
instance, or now also, from the class.

Signed-off-by: Mark Blakeney <mark.blakeney@bullet-systems.net>
This commit is contained in:
Mark Blakeney
2023-10-24 10:24:26 +10:00
committed by Damien George
parent f07f90f1ab
commit fbb7c32040
2 changed files with 7 additions and 4 deletions
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docs/library/esp32.rst
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@@ -226,7 +226,7 @@ For more details see Espressif's `ESP-IDF RMT documentation.
``100``) and the output level to apply the carrier to (a boolean as per
*idle_level*).
.. method:: RMT.source_freq()
.. classmethod:: RMT.source_freq()
Returns the source clock frequency. Currently the source clock is not
configurable so this will always return 80MHz.