public LTC2943Service() : base((int)LTC2943_Constants.ADDRESS)
{
this.Enabled = this.InitSensor();
_batteryUnderChargeGpio = ProcessorPin.Gpio33;//GPIO33, led di carica
GpioGlobalConnection.Add(_batteryUnderChargeGpio, false);
GpioGlobalConnection.GlobalConnectionPin.PinStatusChanged += GlobalConnectionPin_PinStatusChanged;
_chargeStatus = ChargeStatusType.NotCharging;
_prescalerSelected = PRESCALER_1024;
_batteryUnderChargeStatus = true;
BATTERY_NOMINAL_VOLTAGE = 7.2;
BATTERY_MAX_VOLTAGE = 8.38;
}
private async Task ReadContinuosly(CancellationToken cancellationToken)
{
GaugeEventArgs eventArgs = new GaugeEventArgs();
ChargeStatusType previousStatus = ChargeStatusType.NotCharging;
bool chargeCompleted = false;
while (!cancellationToken.IsCancellationRequested)
{
try
{
//read values from module
ElectricCurrent a = ReadCurrent();
ElectricPotentialDc v = ReadVoltage();
Temperature t = ReadTemperature();
byte s = ReadStatusRegister();
ElectricCharge c = ReadAccumulatedCharge();
//set status
if (_batteryUnderChargeStatus)
{
if (a.Milliamperes < 0)
{
_chargeStatus = ChargeStatusType.Discharging;
}
else if (a.Milliamperes > 0 && a.Milliamperes <= 1 && v.Value > BATTERY_MAX_VOLTAGE)
{
_chargeStatus = ChargeStatusType.NotCharging;
}
else if (a.Milliamperes > 0 && a.Milliamperes <= 1 && v.Value >= BATTERY_NOMINAL_VOLTAGE)
{
_chargeStatus = ChargeStatusType.Completed;
}
}
else
{
if (v.VoltsDc >= BATTERY_NOMINAL_VOLTAGE && a.Milliamperes > 10)
{
_chargeStatus = ChargeStatusType.Charging;
}
}
//calculate remaining charge
double remainingCharge = BATTERY_CAPACITY_MAH + (c.Coulombs * COULOMBS_TO_MILLIAMPEREHOUR) - QBATMAX; //mAh
double remainingTime = Math.Abs(remainingCharge / a.Milliamperes); // hours
double maxTime = Math.Abs(BATTERY_CAPACITY_MAH / a.Milliamperes); //hours
double remainigPercentage = Math.Round(100 * remainingTime / maxTime, 2);
switch (_chargeStatus)
{
case ChargeStatusType.Charging:
remainingTime = maxTime - remainingTime;
chargeCompleted = false;
if ((s & 32) == 32 || eventArgs.Charge.Coulombs >= c.Coulombs) //during charging got overflow, set percentage to 99 and not save anything on db
{
remainigPercentage = 100;
}
break;
case ChargeStatusType.Discharging:
// if charge is too low, close app
chargeCompleted = false;
if (remainigPercentage <= 20)
{
Console.WriteLine("Close APP {0}", remainigPercentage);
}
if ((s & 32) == 32) //during discharging got overflow, set percentage to 99 and not save anything on db
{
remainigPercentage = 0;
}
break;
case ChargeStatusType.Completed:
if (!chargeCompleted)
{
SetChargingComplete();
chargeCompleted = true;
SaveLastCharge(QBATMAX);
}
remainigPercentage = 100;
break;
case ChargeStatusType.NotCharging:
chargeCompleted = false;
break;
}
Console.WriteLine("{0} {1} {2} {3} {4} {5}", remainingCharge, remainingTime, maxTime, remainigPercentage, s, _chargeStatus);
//aggiorna e scatena eventi
if ((Math.Abs(remainigPercentage - eventArgs.ChargePercentage) >= 1) || previousStatus != _chargeStatus)
{
eventArgs.Charge = c;
eventArgs.Current = a;
eventArgs.Temperature = t;
eventArgs.Voltage = v;
eventArgs.ChargePercentage = remainigPercentage > 100 ? 100 : remainigPercentage;
eventArgs.Status = s;
eventArgs.RemainingTime = TimeSpan.FromHours(remainingTime);
eventArgs.LedOn = !_batteryUnderChargeStatus;
Console.WriteLine(string.Format("LTC: charge= {0}, status= {1}, %={2}, v={3}, a={4}, t={5}, cs={6}", c, s, remainigPercentage, v.Value, a.Milliamperes, t, _chargeStatus));
//save last charge to db. to be used at startup, next switch off/switch on
SaveLastCharge(c.Value);
previousStatus = _chargeStatus;
OnGaugeChanged?.Invoke(eventArgs);
}
await Task.Delay(10000, cancellationToken);
}
catch (Exception e)
{
Console.WriteLine("Error: {0}, {1}", e.Message, e.InnerException.Message);
}
}
Console.WriteLine("Stopping LTC2943 reading task.");
}
