/// <summary>
/// Dispose this instance and release managed resources.
/// </summary>
/// <param name="disposing">
/// If set to <c>true</c> disposing and not finalizing.
/// </param>
private void Dispose(Boolean disposing)
{
if (this._isDisposed)
{
return;
}
if (this._registerSelectPort != null)
{
this._registerSelectPort.Dispose();
this._registerSelectPort = null;
}
if (this._readWritePort != null)
{
this._readWritePort.Dispose();
this._readWritePort = null;
}
if (this._enablePort != null)
{
this._enablePort.Dispose();
this._enablePort = null;
}
if ((this._dataPorts != null) && (this._dataPorts.Length > 0))
{
for (Int32 i = 0; i < 8; i++)
{
if (this._dataPorts[i] != null)
{
this._dataPorts[i].Dispose();
}
}
Array.Clear(this._dataPorts, 0, this._dataPorts.Length);
}
if (disposing)
{
GC.SuppressFinalize(this);
}
this._isDisposed = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="CyrusBuilt.MonoPi.LCD.GpioMemLcdTransferProvider"/>
/// class with the mode flag, register select pin, read/write pin,
/// enable pin, and data pins.
/// </summary>
/// <param name="fourBitMode">
/// If set to true, switch to four bit mode instead of 8 bit mode.
/// </param>
/// <param name="rs">
/// The number of the CPU pin that is connected to the RS (Register Select)
/// pin on the LCD.
/// </param>
/// <param name="rw">
/// The number of the CPU pin that is connected to the RW (Read/Write)
/// pin on the LCD.
/// </param>
/// <param name="enable">
/// The number of the CPU pin that is connected to the enable pin
/// on the LCD.
/// </param>
/// <param name="d0">
/// Data line 0.
/// </param>
/// <param name="d1">
/// Data line 1.
/// </param>
/// <param name="d2">
/// Data line 2.
/// </param>
/// <param name="d3">
/// Data line 3.
/// </param>
/// <param name="d4">
/// Data line 4.
/// </param>
/// <param name="d5">
/// Data line 5.
/// </param>
/// <param name="d6">
/// Data line 6.
/// </param>
/// <param name="d7">
/// Data line 7.
/// </param>
/// <remarks>
/// The display can be controlled using 4 or 8 data lines. If the former,
/// omit the pin numbers for d0 to d3 and leave those lines disconnected.
/// The RW pin can be tied to ground instead of connected to a pin on the
/// Arduino; If so, omit it from this constructor's parameters.
/// </remarks>
/// <exception cref="ArgumentException">
/// <paramref name="rs"/> and <paramref name="enable"/> cannot be set to
/// <see cref="GpioPins.GPIO_NONE"/>.
/// </exception>
public GpioMemLcdTransferProvider(Boolean fourBitMode, GpioPins rs, GpioPins rw, GpioPins enable,
GpioPins d0, GpioPins d1, GpioPins d2, GpioPins d3, GpioPins d4,
GpioPins d5, GpioPins d6, GpioPins d7)
{
this._fourBitMode = fourBitMode;
if (rs == GpioPins.GPIO_NONE)
{
throw new ArgumentException("rs");
}
this._registerSelectPort = new GpioMem(rs, PinMode.OUT);
this._registerSelectPort.Provision();
// We can save a pin by not using RW. Indicate by passing GpioPins.GPIO_NONE
// instead of pin # (RW is optional).
if (rw != GpioPins.GPIO_NONE)
{
this._readWritePort = new GpioMem(rw, PinMode.OUT);
this._readWritePort.Provision();
}
if (enable == GpioPins.GPIO_NONE)
{
throw new ArgumentException("enable");
}
this._enablePort = new GpioMem(enable, PinMode.OUT);
this._enablePort.Provision();
GpioPins[] dataPins = { d0, d1, d2, d3, d4, d5, d6, d7 };
this._dataPorts = new GpioMem[8];
for (Int32 i = 0; i < 8; i++)
{
if (dataPins[i] == GpioPins.GPIO_NONE)
{
this._dataPorts[i] = new GpioMem(dataPins[i], PinMode.OUT);
this._dataPorts[i].Provision();
}
}
}
