throttleToMaxRefreshRate()

static void throttleToMaxRefreshRate ( fl::u32 minMicros )

static

Definition at line 337 of file FastLED.cpp.hpp.

                                                                   {
    if (!minMicros) {
        return;
    }
#if SKETCH_HAS_LARGE_MEMORY
    const fl::u32 spinBudget = fl::detail::getWaitSpinBudgetUs();
#endif
    while (true) {
        const fl::u32 elapsed = fl::micros() - lastshow;
        if (elapsed >= minMicros) {
            return;
        }
#if SKETCH_HAS_LARGE_MEMORY
        const fl::u32 remaining = minMicros - elapsed;
        // Deep yield only while a radio is up AND there is more than the spin
        // budget left to burn. Once inside the budget we spin, because a deep
        // yield costs a whole tick and would overshoot the deadline.
        if (remaining > spinBudget && fl::NetworkDetector::isAnyNetworkActive()) {
            fl::task::yield_system(250);
        } else {
            // taskYIELD()-equivalent: equal-priority tasks still get CPU, but
            // there is no FreeRTOS tick floor, so this stays sub-microsecond.
            fl::task::yield_system(0);
        }
#endif
    }
}

References FL_NO_EXCEPT, fl::detail::getWaitSpinBudgetUs(), fl::net::NetworkDetector::isAnyNetworkActive(), lastshow, fl::micros(), and fl::task::yield_system().

Referenced by CFastLED::show(), and CFastLED::showColor().

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