//no need to setup pin this is done for you
public bool InputPin(RaspiGpio 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, enumDirection.IN);
}
string filename = GPIO_PATH + pin.ToString() + "/value";
if (File.Exists(filename))
{
string readValue = File.ReadAllText(filename);
if (readValue != null && readValue.Length > 0 && readValue[0] == '1')
{
returnValue = true;
}
}
else
{
throw new Exception(string.Format("Cannot read from {0}. File does not exist", pin));
}
if (DEBUG)
{
Console.WriteLine("input from pin " + pin + ", value was " + returnValue);
}
return(returnValue);
}
//this gets called automatically when we try and output to, or input from, a pin
private void SetupPin(RaspiGpio pin, enumDirection 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));
if (DEBUG)
{
Console.WriteLine("exporting pin " + pin + " as " + direction);
}
// set i/o direction
File.WriteAllText(GPIO_PATH + pin.ToString() + "/direction", direction.ToString().ToLower());
//record the fact that we've setup that pin
if (direction == enumDirection.OUT)
{
outExported.Add(pin);
}
else
{
inExported.Add(pin);
}
}
//no need to setup pin this is done for you
public void OutputPin(RaspiGpio 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, enumDirection.OUT);
}
string writeValue = "0";
if (value)
{
writeValue = "1";
}
File.WriteAllText(GPIO_PATH + pin.ToString() + "/value", writeValue);
if (DEBUG)
{
Console.WriteLine("output to pin " + pin + ", value was " + value);
}
}
//if for any reason you want to unexport a particular pin use this, otherwise just call CleanUpAllPins when you're done
public void UnexportPin(RaspiGpio 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));
if (DEBUG)
{
Console.WriteLine("unexporting pin " + pin);
}
}
}
//this gets called automatically when we try and output to, or input from, a pin
private void SetupPin(RaspiGpio pin, enumDirection 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));
if (DEBUG) Console.WriteLine("exporting pin " + pin + " as " + direction);
// set i/o direction
File.WriteAllText(GPIO_PATH + pin.ToString() + "/direction", direction.ToString().ToLower());
//record the fact that we've setup that pin
if (direction == enumDirection.OUT)
outExported.Add(pin);
else
inExported.Add(pin);
}
private string GetPinNumber(RaspiGpio pin)
{
return ((int)pin).ToString(); //e.g. returns 17 for enum value of gpio17
}
//if for any reason you want to unexport a particular pin use this, otherwise just call CleanUpAllPins when you're done
public void UnexportPin(RaspiGpio 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));
if (DEBUG) Console.WriteLine("unexporting pin " + pin);
}
}
//no need to setup pin this is done for you
public void OutputPin(RaspiGpio 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, enumDirection.OUT);
string writeValue = "0";
if (value) writeValue = "1";
File.WriteAllText(GPIO_PATH + pin.ToString() + "/value", writeValue);
if (DEBUG) Console.WriteLine("output to pin " + pin + ", value was " + value);
}
//no need to setup pin this is done for you
public bool InputPin(RaspiGpio 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, enumDirection.IN);
string filename = GPIO_PATH + pin.ToString() + "/value";
if (File.Exists(filename))
{
string readValue = File.ReadAllText(filename);
if (readValue != null && readValue.Length > 0 && readValue[0] == '1') returnValue = true;
}
else
throw new Exception(string.Format("Cannot read from {0}. File does not exist", pin));
if (DEBUG) Console.WriteLine("input from pin " + pin + ", value was " + returnValue);
return returnValue;
}
private string GetPinNumber(RaspiGpio pin)
{
return(((int)pin).ToString()); //e.g. returns 17 for enum value of gpio17
}
