// Send power to the heater
private void pwmHeater(object sender, object e)
{
if (BrewingTimer.StillCounting())
{
counter++;
double cykle = Math.Min(u, 100 - u);
cykle = (int)Math.Round(100 / cykle);
if (counter < 100)
{
double modu = counter % cykle;
if (u > 50)
{
modu = 1 - modu;
}
if (modu > 0 && heaterOn)
{
heaterPin.Write(GpioPinValue.Low);
indicatorPin.Write(GpioPinValue.Low);
heaterOn = false;
}
else if (modu <= 0 && !heaterOn)
{
heaterPin.Write(GpioPinValue.High);
indicatorPin.Write(GpioPinValue.High);
heaterOn = true;
}
else
{
// heaterPin is in correct state; do nothing
}
}
else
{ // Cykle finnished sett heaterPin low for safty issues
counter = 0;
heaterPin.Write(GpioPinValue.Low);
indicatorPin.Write(GpioPinValue.Low);
heaterOn = false;
}
}
else if (heaterOn)
{
heaterPin.Write(GpioPinValue.Low);
indicatorPin.Write(GpioPinValue.Low);
}
}
// part of simulator
private void updateTemp(object sender, object e)
{
convertADCreadingsToTempature();
if (BrewingTimer.StillCounting())
{
// error
var error = setTemp[MainPage.index] - curTemp;
if (!userSetPower)
{
Debug.Write("I 1: " + ((1.0 / Ti) * error));
// Regulator
p = Kp * error;
i += (1.0 / Ti) * error;
Debug.Write(" I 2:" + i);
//i = i * Kp;
//Debug.WriteLine("I 3:" + i);
i = Math.Max(Math.Min((100.0 / Kp), i), (-100.0 / Kp)); // Anti windup
Debug.Write(" I 3:" + i);
Debug.WriteLine(" I 4:" + (i * Kp));
u = p + (i * Kp);
u = Math.Max(Math.Min(100, u), 0); // Min value 0 Max value 100
}
// Change in temp (Simulated data remp region 0-105)
//var dTemp = u * (PMAX / (double)(CP * M));
//var tempDiff = 20 - curTemp;
//curTemp += (dTemp + (0.2 * tempDiff));
//curTemp = Math.Min(Math.Max(curTemp, 0), 102);
if (setTemp[MainPage.index] - curTemp < 1)
{
ready = true;
}
else
{
ready = false;
}
//System.Diagnostics.Debug.WriteLine("Set temp = " + setTemp + " Cur temp = " + curTemp + " Pådrag = " + dTemp);
}
else
{
u = 0;
}
}