Lerking/micropython
1
0
Fork 0
mirror of https://github.com/micropython/micropython.git synced 2026-01-05 03:30:14 +01:00
Code Issues Actions 52 Packages Projects Releases Wiki Activity

docs/esp32: Add documentation for esp32.PCNT.

Browse Source 
Document the new `esp32.PCNT` class for hardware pulse counting.

Originally authored by: Jonathan Hogg <me@jonathanhogg.com>

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
This commit is contained in:
Jonathan Hogg
2022-09-10 17:08:27 +01:00
committed by Damien George
parent c3f3339c87
commit e54553c496
2 changed files with 163 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
docs/esp32/quickref.rst
View File

@@ -566,6 +566,27 @@ ESP32 S2:
Provided to deinit the adc driver.
Pulse Counter (pin pulse/edge counting)
---------------------------------------
The ESP32 provides up to 8 pulse counter peripherals depending on the hardware,
with id 0..7. These can be configured to count rising and/or falling edges on
any input pin.
Use the :ref:`esp32.PCNT <esp32.PCNT>` class::
from machine import Pin
from esp32 import PCNT
counter = PCNT(0, pin=Pin(2), rising=PCNT.INCREMENT) # create counter
counter.start() # start counter
count = counter.value() # read count, -32768..32767
counter.value(0) # reset counter
count = counter.value(0) # read and reset
The PCNT hardware supports monitoring multiple pins in a single unit to
implement quadrature decoding or up/down signal counters.
Software SPI bus
----------------