//no need to setup pin this is done for you
public bool InputPin(PinEnum pin)
{
bool returnValue = false;
//if we havent used the pin before, or if we used it as an output before, set it up
if (!_inExported.Contains(pin) || _outExported.Contains(pin))
{
SetupPin(pin, DirectionEnum.IN);
}
string filename = GetFilenameValue(pin);
if (File.Exists(filename))
{
string readValue = File.ReadAllText(filename);
if (readValue.Length > 0 && readValue[0] == '1')
{
returnValue = true;
}
}
else
{
throw new Exception(string.Format("Cannot read from {0}. File does not exist", pin));
}
Debug.WriteLine("input from pin " + pin + ", value was " + returnValue);
return(returnValue);
}
/// <summary>
/// this gets called automatically when we try and output to, or input from, a pin
/// </summary>
/// <param name="pin"></param>
/// <param name="direction"></param>
private void SetupPin(PinEnum pin, DirectionEnum direction)
{
//unexport if it we're using it already
if (_outExported.Contains(pin) || _inExported.Contains(pin))
{
UnexportPin(pin);
}
//export
File.WriteAllText(GPIO_PATH + "export", GetPinNumber(pin));
Debug.WriteLine("exporting pin " + pin + " as " + direction);
// set i/o direction
File.WriteAllText(GPIO_PATH + pin + "/direction", direction.ToString().ToLower());
//record the fact that we've setup that pin
if (direction == DirectionEnum.OUT)
{
_outExported.Add(pin);
}
else
{
_inExported.Add(pin);
}
}
//no need to setup pin this is done for you
public void OutputPin(PinEnum pin, bool value)
{
//if we havent used the pin before, or if we used it as an input before, set it up
if (!_outExported.Contains(pin) || _inExported.Contains(pin)) SetupPin(pin, DirectionEnum.OUT);
string writeValue = "0";
if (value) writeValue = "1";
File.WriteAllText(GetFilenameValue(pin), writeValue);
Debug.WriteLine("output to pin " + pin + ", value was " + value);
}
private string GetFilenameValue(PinEnum pin)
{
string result;
if (_filenames4Values.TryGetValue((int)pin, out result))
{
return(result);
}
result = GPIO_PATH + pin + "/value";
_filenames4Values.Add((int)pin, result);
return(result);
}
/// <summary>
/// Meldet alle <i>Direct Show</i> Ein- und Ausgänge dieses Filters. Diese
/// sind abhängig vom aktuellen Betriebsmodus als Demultiplexer oder
/// Datenquelle.
/// </summary>
/// <returns>Eine Auflistung über die Ein- und Ausgänge.</returns>
public IEnumPins EnumPins()
{
// Create
var pinEnum = new PinEnum();
// Fill pins
if (DataManager != null)
{
// Report all
pinEnum.Add(DataManager);
pinEnum.Add(DataManager.TIFConnector);
}
// Report
return(pinEnum);
}
//no need to setup pin this is done for you
public void OutputPin(PinEnum pin, bool value)
{
//if we havent used the pin before, or if we used it as an input before, set it up
if (!_outExported.Contains(pin) || _inExported.Contains(pin))
{
SetupPin(pin, DirectionEnum.OUT);
}
string writeValue = "0";
if (value)
{
writeValue = "1";
}
File.WriteAllText(GetFilenameValue(pin), writeValue);
Debug.WriteLine("output to pin " + pin + ", value was " + value);
}
/// <summary>
/// this gets called automatically when we try and output to, or input from, a pin
/// </summary>
/// <param name="pin"></param>
/// <param name="direction"></param>
private void SetupPin(PinEnum pin, DirectionEnum direction)
{
//unexport if it we're using it already
if (_outExported.Contains(pin) || _inExported.Contains(pin)) UnexportPin(pin);
//export
File.WriteAllText(GPIO_PATH + "export", GetPinNumber(pin));
Debug.WriteLine("exporting pin " + pin + " as " + direction);
// set i/o direction
File.WriteAllText(GPIO_PATH + pin + "/direction", direction.ToString().ToLower());
//record the fact that we've setup that pin
if (direction == DirectionEnum.OUT)
_outExported.Add(pin);
else
_inExported.Add(pin);
}
/// <summary>
/// if for any reason you want to unexport a particular pin use this, otherwise just call CleanUpAllPins when you're done
/// </summary>
/// <param name="pin"></param>
public void UnexportPin(PinEnum pin)
{
bool found = false;
if (_outExported.Contains(pin))
{
found = true;
_outExported.Remove(pin);
}
if (_inExported.Contains(pin))
{
found = true;
_inExported.Remove(pin);
}
if (found)
{
File.WriteAllText(GPIO_PATH + "unexport", GetPinNumber(pin));
Debug.WriteLine("unexporting pin " + pin);
}
}
/// <summary>
/// Meldet alle <i>Direct Show</i> Ein- und Ausgänge dieses Filters. Diese
/// sind abhängig vom aktuellen Betriebsmodus als Demultiplexer oder
/// Datenquelle.
/// </summary>
/// <returns>Eine Auflistung über die Ein- und Ausgänge.</returns>
public IEnumPins EnumPins()
{
// Create
PinEnum pinEnum = new PinEnum();
// Audio
if (m_Audio != null)
{
if (m_Audio.Pin != null)
{
pinEnum.Add(m_Audio.Pin);
}
}
if (m_Video != null)
{
if (m_Video.Pin != null)
{
pinEnum.Add(m_Video.Pin);
}
}
// Report
return(pinEnum);
}
public SetPinCommand(PinEnum pin, sbyte number, ushort value)
{
Pin = pin;
Number = number;
Value = value;
}
private static string GetPinNumber(PinEnum pin)
{
return(((int)pin).ToString()); //e.g. returns 17 for enum value of gpio17
}
//no need to setup pin this is done for you
public bool InputPin(PinEnum pin)
{
bool returnValue = false;
//if we havent used the pin before, or if we used it as an output before, set it up
if (!_inExported.Contains(pin) || _outExported.Contains(pin)) SetupPin(pin, DirectionEnum.IN);
string filename = GetFilenameValue(pin);
if (File.Exists(filename))
{
string readValue = File.ReadAllText(filename);
if (readValue.Length > 0 && readValue[0] == '1') returnValue = true;
}
else
throw new Exception(string.Format("Cannot read from {0}. File does not exist", pin));
Debug.WriteLine("input from pin " + pin + ", value was " + returnValue);
return returnValue;
}
private static string GetPinNumber(PinEnum pin)
{
return ((int)pin).ToString(); //e.g. returns 17 for enum value of gpio17
}
/// <summary>
/// if for any reason you want to unexport a particular pin use this, otherwise just call CleanUpAllPins when you're done
/// </summary>
/// <param name="pin"></param>
public void UnexportPin(PinEnum pin)
{
bool found = false;
if (_outExported.Contains(pin))
{
found = true;
_outExported.Remove(pin);
}
if (_inExported.Contains(pin))
{
found = true;
_inExported.Remove(pin);
}
if (found)
{
File.WriteAllText(GPIO_PATH + "unexport", GetPinNumber(pin));
Debug.WriteLine("unexporting pin " + pin);
}
}
private string GetFilenameValue(PinEnum pin)
{
string result;
if (_filenames4Values.TryGetValue((int)pin, out result))
return result;
result = GPIO_PATH + pin + "/value";
_filenames4Values.Add((int)pin,result);
return result;
}
