private Task printOnLcd()
{
while (!_cts.IsCancellationRequested)
{
List <string> line1 = prepairLine1();
foreach (var content in line1)
{
SymbolConfig.initilizeSymbols();
LCD.prints(content);
LCD.gotoSecondLine();
printLine2();
try
{
Task.Delay(3500).Wait(_cts.Token);
}
catch (Exception e)
{
Debug.WriteLine("cancel LCD-Writing Task");
return(Task.CompletedTask);
}
LCD.clrscr();
}
}
return(Task.CompletedTask);
}
private void printLine2()
{
LCD.prints(" ");
this.LCD.printSymbol(SymbolConfig.busySymbolAddress);
LCD.prints(" ");
this.LCD.printSymbol(SymbolConfig.batterySymbolAddress);
LCD.prints(" ");
this.LCD.printSymbol(SymbolConfig.initSymbolAddress);
LCD.prints(" ");
this.LCD.printSymbol(SymbolConfig.volumeSymbolAddress);
LCD.prints(" ");
}
/// <summary>
/// Method to wrap updating the LCD with fixed information.
/// </summary>
public void updateLCD()
{
if (RasPi.isTestMode())
{
return;
}
LCD.initiateLCD();
cancelWritingWait();
CheckTurnOnBacklight();
_writingOnLcd = Task.Run(async() => await printOnLcd(), _cts.Token);
}
/// <summary>
/// Executes the Command SendToLCD in dependency of the parsed parameter
/// </summary>
/// <param name="parameter">Either a text:string which is to be printed on lcd
/// or a #command:string e.g #reset to clear the display
/// and terminate all tasks related to a previous call
/// </param>
/// <returns>The provided text or a status information.</returns>
public string SendToLCD(string text)
{
const int charsMaxInLine = 16;
if (text == "#reset")
{
LCD.resetLCD();
return("Reset display");
}
if (text.Length <= charsMaxInLine)
{
LCD.writeToLCD(text);
}
else if (text.Length <= 2 * charsMaxInLine)
{
LCD.printInTwoLines(text);
}
else
{
throw new Exception("Text too long to print on LCD");
}
return(text);
}