QUERY · ISSUE

ESP32 Pulse Counter Driver

openby nevercastopened 2019-10-16updated 2021-12-13

port-esp32

Add a driver for ESP32 Pulse Counter Hardware.

Related to: #5214

CANDIDATE · ISSUE

Request to integrate quadrature decoder support via pulse count unit into ESP32 port

closedby sengpwopened 2020-02-03updated 2025-10-03

port-esp32

For ESP 32 exist a solution to use the on chip pulse counter modules (PULSE_CNT) for interfacing multiple (up to 8) quadrature encoded signals. I used the code successfully and integrated it into lv-micropython V1.12.
Think many people would benefit from this code being available within standard micropython too.
For description of module, integration and code see:
https://forum.littlevgl.com/t/example-for-working-with-a-rotary-encoder/1509/20

best regards,

Peter # @

Assessment

S Sonnet · high

Both issues request ESP32 PCNT hardware support, but with different scopes. #5216 asks for a general-purpose PCNT driver. #5602 asks specifically for quadrature decoder support using the same PCNT hardware. Quadrature decoding is a specific use case built on top of PCNT, not the same feature request — #5216's general driver would not necessarily fulfill #5602's quadrature-specific requirements (direction tracking, multi-channel rotary encoder handling). Same hardware peripheral, overlapping but non-identical scope.

Suggested action

Keep both open but link them. When implementing the PCNT driver from #5216, consider whether the API design can accommodate the quadrature decoder use case described in #5602. Resolving #5216 may partially address #5602 but will not close it unless quadrature decoding is explicitly included.

ESP32 Pulse Counter Driver

Request to integrate quadrature decoder support via pulse count unit into ESP32 port

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