/// <summary>
/// Initializes a new instance of the <see cref="Mcp23008InputBinaryPin"/> class.
/// </summary>
/// <param name="connection">The connection.</param>
/// <param name="pin">The pin.</param>
/// <param name="resistor">The resistor.</param>
/// <param name="polarity">The polarity.</param>
public Mcp23008InputBinaryPin(Mcp23008I2cConnection connection, Mcp23008Pin pin,
Mcp23008PinResistor resistor = Mcp23008PinResistor.None,
Mcp23008PinPolarity polarity = Mcp23008PinPolarity.Normal)
{
this.connection = connection;
this.pin = pin;
connection.SetDirection(pin, Mcp23008PinDirection.Input);
connection.SetResistor(pin, resistor);
connection.SetPolarity(pin, polarity);
}
/// <summary>
/// Gets the pin status.
/// </summary>
/// <param name="pin">The pin.</param>
/// <returns>The pin status.</returns>
public bool GetPinStatus(Mcp23008Pin pin)
{
var register = Register.GPIO;
connection.WriteByte((byte)register);
var status = connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
return((status & bit) != 0x00);
}
/// <summary>
/// Initializes a new instance of the <see cref="Mcp23008OutputBinaryPin"/> class.
/// </summary>
/// <param name="connection">The connection.</param>
/// <param name="pin">The pin.</param>
/// <param name="resistor">The resistor.</param>
/// <param name="polarity">The polarity.</param>
public Mcp23008OutputBinaryPin(Mcp23008I2cConnection connection, Mcp23008Pin pin,
Mcp23008PinResistor resistor = Mcp23008PinResistor.None,
Mcp23008PinPolarity polarity = Mcp23008PinPolarity.Normal)
{
this.connection = connection;
this.pin = pin;
connection.SetDirection(pin, Mcp23008PinDirection.Output);
connection.SetResistor(pin, resistor);
connection.SetPolarity(pin, polarity);
}
private static Hd44780Configuration LoadMcp23008Configuration(IEnumerable <string> args)
{
var addressText = args.SkipWhile(s => !String.Equals(s, "mcp23008", StringComparison.InvariantCultureIgnoreCase)).Skip(1).DefaultIfEmpty("0x20").First();
var address = addressText.StartsWith("0x", StringComparison.InvariantCultureIgnoreCase)
? Int32.Parse(addressText.Substring(2), NumberStyles.HexNumber)
: Int32.Parse(addressText);
const Mcp23008Pin registerSelectPin = Mcp23008Pin.Pin1;
const Mcp23008Pin clockPin = Mcp23008Pin.Pin2;
const Mcp23008Pin backlightPin = Mcp23008Pin.Pin7;
var dataPins = new[]
{
Mcp23008Pin.Pin3,
Mcp23008Pin.Pin4,
Mcp23008Pin.Pin5,
Mcp23008Pin.Pin6
};
Console.WriteLine();
Console.WriteLine("Using I2C connection over MCP23008 Expander");
Console.WriteLine("\tRegister Select: {0}", registerSelectPin);
Console.WriteLine("\tClock: {0}", clockPin);
Console.WriteLine("\tData 1: {0}", dataPins[0]);
Console.WriteLine("\tData 2: {0}", dataPins[1]);
Console.WriteLine("\tData 3: {0}", dataPins[2]);
Console.WriteLine("\tData 4: {0}", dataPins[3]);
Console.WriteLine("\tBacklight: {0}", backlightPin);
Console.WriteLine("\tRead/write: GND");
Console.WriteLine();
const ConnectorPin sdaPin = ConnectorPin.P1Pin03;
const ConnectorPin sclPin = ConnectorPin.P1Pin05;
var driver = new I2cDriver(sdaPin.ToProcessor(), sclPin.ToProcessor())
{
ClockDivider = 512
};
var connection = new Mcp23008I2cConnection(driver.Connect(address));
var retVal = new Hd44780Configuration(driver)
{
Pins = new Hd44780Pins(
connection.Out(registerSelectPin),
connection.Out(clockPin),
dataPins.Select(pin => (IOutputBinaryPin)connection.Out(pin)))
};
retVal.Pins.Backlight = connection.Out(backlightPin);
return(retVal);
}
/// <summary>
/// Sets the resistor.
/// </summary>
/// <param name="pin">The pin.</param>
/// <param name="resistor">The resistor.</param>
public void SetResistor(Mcp23008Pin pin, Mcp23008PinResistor resistor)
{
var register = Register.GPPU;
connection.WriteByte((byte)register);
var resistors = connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
var newResistors = (resistor == Mcp23008PinResistor.PullUp)
? resistors | bit
: resistors & ~bit;
connection.Write(new[] { (byte)register, (byte)newResistors });
}
/// <summary>
/// Sets the polarity.
/// </summary>
/// <param name="pin">The pin.</param>
/// <param name="polarity">The polarity.</param>
public void SetPolarity(Mcp23008Pin pin, Mcp23008PinPolarity polarity)
{
var register = Register.IPOL;
connection.WriteByte((byte)register);
var polarities = connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
var newPolarities = (polarity == Mcp23008PinPolarity.Inverted)
? polarities | bit
: polarities & ~bit;
connection.Write(new[] { (byte)register, (byte)newPolarities });
}
/// <summary>
/// Sets the direction.
/// </summary>
/// <param name="pin">The pin.</param>
/// <param name="direction">The direction.</param>
public void SetDirection(Mcp23008Pin pin, Mcp23008PinDirection direction)
{
var register = Register.IODIR;
connection.WriteByte((byte)register);
var directions = connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
var newDirections = (direction == Mcp23008PinDirection.Input)
? directions | bit
: directions & ~bit;
connection.Write(new[] { (byte)register, (byte)newDirections });
}
/// <summary>
/// Sets the pin status.
/// </summary>
/// <param name="pin">The pin.</param>
/// <param name="enabled">if set to <c>true</c>, pin is enabled.</param>
public void SetPinStatus(Mcp23008Pin pin, bool enabled)
{
var register = Register.GPIO;
connection.WriteByte((byte)register);
var status = connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
var newStatus = enabled
? status | bit
: status & ~bit;
connection.Write((byte)register, (byte)newStatus);
}
/// <summary>
/// Sets the resistor.
/// </summary>
/// <param name="pin">The pin.</param>
/// <param name="resistor">The resistor.</param>
public void SetResistor(Mcp23008Pin pin, Mcp23008PinResistor resistor)
{
var register = Register.Gppu;
this.connection.WriteByte((byte)register);
var resistors = this.connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
var newResistors = resistor == Mcp23008PinResistor.PullUp
? resistors | bit
: resistors & ~bit;
this.connection.Write((byte)register, (byte)newResistors);
}
/// <summary>
/// Sets the polarity.
/// </summary>
/// <param name="pin">The pin.</param>
/// <param name="polarity">The polarity.</param>
public void SetPolarity(Mcp23008Pin pin, Mcp23008PinPolarity polarity)
{
var register = Register.Ipol;
this.connection.WriteByte((byte)register);
var polarities = this.connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
var newPolarities = polarity == Mcp23008PinPolarity.Inverted
? polarities | bit
: polarities & ~bit;
this.connection.Write((byte)register, (byte)newPolarities);
}
/// <summary>
/// Sets the direction.
/// </summary>
/// <param name="pin">The pin.</param>
/// <param name="direction">The direction.</param>
public void SetDirection(Mcp23008Pin pin, Mcp23008PinDirection direction)
{
var register = Register.Iodir;
this.connection.WriteByte((byte)register);
var directions = this.connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
var newDirections = direction == Mcp23008PinDirection.Input
? directions | bit
: directions & ~bit;
this.connection.Write((byte)register, (byte)newDirections);
}
/// <summary>
/// Toogles the specified pin.
/// </summary>
/// <param name="pin">The pin.</param>
public void Toogle(Mcp23008Pin pin)
{
var register = Register.GPIO;
connection.WriteByte((byte)register);
var status = connection.ReadByte();
var bit = (byte)((int)pin & 0xFF);
var bitEnabled = (status & bit) != 0x00;
var newBitEnabled = !bitEnabled;
var newStatus = newBitEnabled
? status | bit
: status & ~bit;
connection.Write((byte)register, (byte)newStatus);
}
/// <summary>
/// Creates an input binary pin.
/// </summary>
/// <param name="connection">The connection.</param>
/// <param name="pin">The pin.</param>
/// <param name="resistor">The resistor.</param>
/// <param name="polarity">The polarity.</param>
/// <returns>The pin.</returns>
public static Mcp23008InputBinaryPin In(this Mcp23008I2cConnection connection, Mcp23008Pin pin, Mcp23008PinResistor resistor = Mcp23008PinResistor.None, Mcp23008PinPolarity polarity = Mcp23008PinPolarity.Normal)
{
return(new Mcp23008InputBinaryPin(connection, pin, resistor, polarity));
}
/// <summary>
/// Creates an output binary pin.
/// </summary>
/// <param name="connection">The connection.</param>
/// <param name="pin">The pin.</param>
/// <param name="resistor">The resistor.</param>
/// <param name="polarity">The polarity.</param>
/// <returns>The pin.</returns>
public static Mcp23008OutputBinaryPin Out(this Mcp23008I2cConnection connection, Mcp23008Pin pin, Mcp23008PinResistor resistor = Mcp23008PinResistor.None, Mcp23008PinPolarity polarity = Mcp23008PinPolarity.Normal)
{
return new Mcp23008OutputBinaryPin(connection, pin, resistor, polarity);
}
/// <summary>
/// Creates an output binary pin.
/// </summary>
/// <param name="connection">The connection.</param>
/// <param name="pin">The pin.</param>
/// <param name="resistor">The resistor.</param>
/// <param name="polarity">The polarity.</param>
/// <returns>The output pin.</returns>
public static Mcp23008OutputBinaryPin Out(this Mcp23008Device connection, Mcp23008Pin pin, Mcp23008PinResistor resistor = Mcp23008PinResistor.None, Mcp23008PinPolarity polarity = Mcp23008PinPolarity.Normal)
{
return(new Mcp23008OutputBinaryPin(connection, pin, resistor, polarity));
}