void MagicUnit::getSomeVoltage(std::uint64_t w_data, double &val)
{
    std::uint64_t r_data = 0;
    hwRead((int)Address::Voltage, 3, w_data, 2, &r_data);
    val = r_data;
    val /= 16; // shit right 4 bits
    val *= 0.004;
    val -= 8.192;
}