countio – Support for edge counting

The countio module contains logic to read and count edge transistions

Warning

This module is not available in some SAMD21 (aka M0) builds. See the Support Matrix for more info.

All classes change hardware state and should be deinitialized when they are no longer needed if the program continues after use. To do so, either call deinit() or use a context manager. See Lifetime and ContextManagers for more info.

class countio.Counter(pin_a: microcontroller.Pin)

Counter will keep track of the number of falling edge transistions (pulses) on a given pin

Create a Counter object associated with the given pin. It tracks the number of falling pulses relative when the object is constructed.

Parameters

pin_a (Pin) – Pin to read pulses from.

For example:

import countio
import time
from board import *

pin_counter = countio.Counter(board.D1)
#reset the count after 100 counts
while True:
    if pin_counter.count == 100:
        pin_counter.reset()
    print(pin_counter.count)

count :int

The current count in terms of pulses.

deinit(self) → None

Deinitializes the Counter and releases any hardware resources for reuse.

__enter__(self) → Counter

No-op used by Context Managers.

__exit__(self) → None

Automatically deinitializes the hardware when exiting a context. See Lifetime and ContextManagers for more info.

reset(self) → None

Resets the count back to 0.