Nick PooleAnyone with FreeRTOS knowledge know why I would be seeing occasional delays (in the 10s of microseconds) in starting a SPI transfer on esp32? It's usually the first of several consecutive transactions after not accessing it for a millisecond or so.
Nick PooleI'm using the Arduino SPI bindings, but I'm not calling beginTransaction() or endTransaction() because the mutex is expensive and unnecessary, only one function ever accesses the SPI. I only call beginTransaction() at startup. I am manually toggling the CS pins, but that should not create the sporadic delay I'm seeing. Should I talk to the SPI Master driver directly? Can I give the SPI driver a core affinity and would it help to pin it to the core where the function that calls it is pinned?