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Diffstat (limited to 'docs/esp32')
| -rw-r--r-- | docs/esp32/quickref.rst | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/docs/esp32/quickref.rst b/docs/esp32/quickref.rst index 7127cc402..2c667a0f0 100644 --- a/docs/esp32/quickref.rst +++ b/docs/esp32/quickref.rst @@ -587,6 +587,21 @@ Use the :ref:`esp32.PCNT <esp32.PCNT>` class:: The PCNT hardware supports monitoring multiple pins in a single unit to implement quadrature decoding or up/down signal counters. +See the :ref:`machine.Counter <machine.Counter>` and +:ref:`machine.Encoder <machine.Encoder>` classes for simpler abstractions of +common pulse counting applications:: + + from machine import Pin, Counter + + counter = Counter(0, Pin(2)) # create a counter as above and start it + count = counter.value() # read the count as an arbitrary precision signed integer + + encoder = Encoder(0, Pin(12), Pin(14)) # create an encoder and begin counting + count = encoder.value() # read the count as an arbitrary precision signed integer + +Note that the id passed to these ``Counter()`` and ``Encoder()`` objects must be +a PCNT id. + Software SPI bus ---------------- |