select-channel

C++ implementation

#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD

node {

    void evaluate(Context ctx) {
        // The node responds only if there is an input pulse
        if (!isInputDirty<input_UPD>(ctx))
            return;

        uint8_t channel = getValue<input_CHAN>(ctx);
        if (channel > 7) return;

        auto wire = getValue<input_I2C>(ctx);

        wire->beginTransmission(getValue<input_ADDR>(ctx));
        wire->write(1 << channel);
        wire->endTransmission();  

        emitValue<output_Done>(ctx, 1);
    }
}