bool ConnectionFSC::CheckChecksum ( )

inlineprivate

Definition at line 82 of file fscctrl.cc.

References FSC::BinaryOutput_t::ad7719_values, FSC::BinaryOutput_t::ad7719_values_checksum, FSC::BinaryOutput_t::adc_values, FSC::BinaryOutput_t::adc_values_checksum, Tools::Fletcher16(), FSC::kNumResistanceChannels, and FSC::kNumVoltageChannels.

    {
        const uint16_t volt_checksum = Tools::Fletcher16(fMsg.adc_values,    kNumVoltageChannels);
        const uint16_t resi_checksum = Tools::Fletcher16(fMsg.ad7719_values, kNumResistanceChannels);

        const bool volt_ok = volt_checksum == fMsg.adc_values_checksum;
        const bool resi_ok = resi_checksum == fMsg.ad7719_values_checksum;

        if (volt_ok && resi_ok)
            return true;

        fNumConsecutiveErrors++;

        ostringstream out;
        out << "Checksum error (V:";
        out << hex << setfill('0');

        if (volt_ok)
            out << "----|----";
        else
        {
            out << setw(4) << volt_checksum;
            out << "|";
            out << setw(4) << fMsg.adc_values_checksum;
        }

        out << ", R:";

        if (resi_ok)
            out << "----|----";
        else
        {
            out << setw(4) << resi_checksum;
            out << "|";
            out << setw(4) << fMsg.ad7719_values_checksum;
        }

        out << ",  " << dec;
        out << "Nok=" << fNumConsecutiveMessages << ", ";
        out << "Nerr=" << fNumConsecutiveErrors << ")";

        Warn(out);

        fNumConsecutiveMessages = 0;

        return false;
    }

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