public bool read(Device dev)
{
var thermo = (Thermostat)dev;
if (thermo == null || _weather == null)
{
return(false);
}
var now = dev.Frame.now();
if (_last_time == DateTime.MinValue)
{
_last_time = dev.Frame.now();
_current_temp.C = _weather.Temperature();
}
var time_diff = (now - _last_time).TotalSeconds;
if (time_diff < 5e-3) //5 ms resolution on simulation for now
{
return(true);
}
//hack hack hack to disable the IO temporarily.
var input = dev.Input;
var output = dev.Output;
dev.resetIO();
var val = typeof(Thermostat).GetProperty("Value");
var temp = new Temperature();
var outside_temp = _weather.Temperature(now);
var plant_drive = UpdatePlant(thermo, _current_temp.C, outside_temp);
var external_diff = outside_temp - _current_temp.C;
_current_temp.C += (external_diff * _thermal_rate) * time_diff + plant_drive * time_diff;
temp.C = _current_temp.C;
val.SetValue(thermo, temp);
_last_time = now;
//hack hack hack to restore the IO
dev.resetIO(input, output);
return(true);
}
public SimTempInput(IWeather weather)
{
_weather = weather;
_current_temp = new Temperature()
{
C = _weather.Temperature()
};
_last_time = DateTime.MinValue;
_running = false;
_thermal_rate = 1.0e-2;
}