public void Setup(int pin, Direction direction, PullUpDown pullUpDown)
{
Pin pinObj;
if (pins.ContainsKey(pin))
{
pinObj = pins[pin];
}
else
{
pinObj = new Pin();
// export pin
Export(pin);
// create direction streams
pinObj.DirectionStream = new FileStream(string.Format(GpioPinDirectionPath, pin), FileMode.Open,
FileAccess.ReadWrite, FileShare.ReadWrite);
pinObj.DirectionWriter = new StreamWriter(pinObj.DirectionStream, Encoding.ASCII);
pinObj.DirectionReader = new StreamReader(pinObj.DirectionStream, Encoding.ASCII);
// create value streams
pinObj.ValueStream = new FileStream(string.Format(GpioPinValuePath, pin), FileMode.Open,
FileAccess.ReadWrite, FileShare.ReadWrite);
pinObj.ValueWriter = new StreamWriter(pinObj.ValueStream, Encoding.ASCII);
pinObj.ValueReader = new StreamReader(pinObj.ValueStream, Encoding.ASCII);
pins.Add(pin, pinObj);
}
// set pin direction
PosixUtils.Echo(pinObj.DirectionWriter, direction == Direction.Input ? "in" : "out");
// TODO : and pull up down ?
}
private void Unexport(int pin)
{
if (!IsExported(pin))
{
return;
}
PosixUtils.Echo(unexportWriter, pin.ToString());
}
private void OutputGpio(Pin pin, HighLow value, long duration = -1)
{
PosixUtils.Echo(pin.ValueWriter, value == HighLow.High ? "1" : "0");
if (duration != -1)
{
operatingSystemService.NanoSleep(duration);
}
}