Hi Tomek, Please take a look:
https://github.com/apache/nuttx/blob/master/arch/xtensa/src/esp32/esp32_qencoder.c It was tested with common rotary encoders (i.e. those used on 3D Printers to select items on UI menu). I didn't test it at high frequencies, but according with this thread https://esp32.com/viewtopic.php?t=7011 it could work up to 40MHz (APB Freq / 2) if you disable the input filter. BR, Alan On 2/18/23, Tomek CEDRO <to...@cedro.info> wrote: > Hello world :-) > > Is PCNT peripheral supported on ESP32 port in NuttX? > > I am building a new device that will use industrial rotary encoder > with pulses up to 1..3MHz so GPIO/IRQ processing is probably not a > good idea. > > I am wondering if there are such rotary use cases in NuttX? > > I wanted to use RISC-V CPU.. I have whole bunch of ESP32-C3.. but it > has no PCNT peripheral that sounds like a perfect candidate for the > task.. so I will probably use ESP32 :-) > > Any hints welcome :-) > Tomek > > -- > CeDeROM, SQ7MHZ, http://www.tomek.cedro.info >
