Function maybeShutdownIsr

src/fl/system/pin.cpp.hpp:195–202

Shutdown ISR if no ISR-backend channels remain

// Shutdown ISR if no ISR-backend channels remain
void maybeShutdownIsr() {
    PwmStateData& st = state();
    if (!st.isr_active) return;
    if (countIsrChannels() > 0) return;

    fl::isr::detach_handler(st.isr_handle);
    st.isr_active = false;
}

// Release a channel and cleanup
void releaseChannel(PwmPinState* ch) {