poll()

IChannelDriver::DriverState fl::SpiChannelEngineAdapter::poll ( )

overridevirtual

Query driver state and perform maintenance.

Returns

Current driver state (READY, BUSY, DRAINING, or ERROR)

Note

Checks isBusy(), releases buffers when complete

Implements fl::IChannelDriver.

Definition at line 264 of file spi_channel_adapter.cpp.hpp.

                                                                     {
    // Check if ANY controller is busy
    bool anyBusy = false;
    for (const auto& ctrl : mControllers) {
        if (ctrl.controller && ctrl.controller->isBusy()) {
            anyBusy = true;
            break;
        }
    }
 
    if (anyBusy) {
        return DriverState::BUSY;
    }
 
    // All controllers idle - release transmitting channels
    if (!mTransmittingChannels.empty()) {
        FL_DBG("SpiChannelEngineAdapter: Releasing " << mTransmittingChannels.size() << " completed channels");
 
        for (const auto& channel : mTransmittingChannels) {
            if (channel) {
                channel->setInUse(false);
            }
        }
        mTransmittingChannels.clear();
    }
 
    // Check for draining state
    if (!mEnqueuedChannels.empty()) {
        return DriverState::DRAINING;
    }
 
    return DriverState::READY;
}

References FL_DBG, fl::FL_NO_EXCEPT, mControllers, mEnqueuedChannels, and mTransmittingChannels.

Referenced by ~SpiChannelEngineAdapter().

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