General discussion • Re: Rotary Encoder RPi 4B in C

Code:

Name:   rotary-encoderInfo:   Overlay for GPIO connected rotary encoder.Load:   dtoverlay=rotary-encoder,<param>=<val>Params: pin_a                   GPIO connected to rotary encoder channel A                                (default 4).        pin_b                   GPIO connected to rotary encoder channel B                                (default 17).         relative_axis           register a relative axis rather than an                                absolute one. Relative axis will only                                 generate +1/-1 events on the input device,                                hence no steps need to be passed.        linux_axis              the input subsystem axis to map to this                                 rotary encoder. Defaults to 0 (ABS_X / REL_X)        rollover                Automatic rollover when the rotary value                                becomes greater than the specified steps or                                smaller than 0. For absolute axis only.        steps-per-period        Number of steps (stable states) per period.                                The values have the following meaning:                                1: Full-period mode (default)                                2: Half-period mode                                 4: Quarter-period mode         steps                   Number of steps in a full turnaround of the                                encoder. Only relevant for absolute axis.                                Defaults to 24 which is a typical value for                                such devices.        wakeup                  Boolean, rotary encoder can wake up the                                system.        encoding                String, the method used to encode steps.                                Supported are "gray" (the default and more                                 common) and "binary".