I have an application that requires a CPU core to be completely isolated in order to achieve fast and precise GPIO timing. I have tried some libraries like WiringOP on Orange PI and able to achieve relatively fast GPIO switching (1.7 MHz), but it seems the Linux kernel adds some delays. According to this discussion: Max ARISC CLK and step-rates ? (https://github.com/orangecnc/h3_arisc_firmware/issues/13), “at least 50 us of latency every millisecond”. Any way to avoid or minimize those delays ?
