https://github.com/todbot/pico8enc

Lotsa Rotary Encoders on a Raspberry Pi Pico
https://github.com/todbot/pico8enc

circuitpython raspberrypipico rotary-encoder rotary-encoders

Last synced: 4 months ago
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Lotsa Rotary Encoders on a Raspberry Pi Pico

• Host: GitHub
• URL: https://github.com/todbot/pico8enc
• Owner: todbot
• Created: 2021-04-06T03:06:10.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2021-05-07T21:04:55.000Z (almost 4 years ago)
• Last Synced: 2024-09-27T09:23:33.894Z (4 months ago)
• Topics: circuitpython, raspberrypipico, rotary-encoder, rotary-encoders
• Language: Python
• Homepage:
• Size: 8.47 MB
• Stars: 35
• Watchers: 5
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# pico8enc -- 8 rotary encoders on a Raspberry Pi Pico

Turns out you can hook up 8 rotary encoders w/ switches to

Raspberry Pi Pico with no extra hardware. Pretty cool!

With CircuitPython, it becomes pretty easy to actually read these encoders

since all hard, timing-critical work is done inside the C-based `rotaryio`

library that comes standard with CircuitPython.





One "twist" to look out for (haha): the two rotary encoder pins must be hooked up

to adjacent pins on the Pico, because of how `rotaryio` uses the Pico's

PIO module to handle reading the encoder pulses.

The core of the code looks like this:

```py

encoder_pins = ( (board.GP12, board.GP13, board.GP16),  # pin A, pin B, pin for switch

                 (board.GP10, board.GP11, board.GP17),

                 (board.GP8, board.GP9, board.GP18),

                 (board.GP6, board.GP7, board.GP19),

                 # ...

                 )

encoders = []

encoder_buttons = []

for pins in encoder_pins:

    pin_A, pin_B, pin_switch = pins

    encoder = rotaryio.IncrementalEncoder( pin_A, pin_B )

    button = DigitalInOut(pin_switch)

    button.pull = Pull.UP

    encoders.append(encoder)

    encoder_buttons.append(button)

while True:

    for i in range(len(encoders)):

      position = encoders[i].position

      button_press = encoder_buttons[i].value

```