/// <summary>
/// Initializes a new instance of the <see cref="Pcf8574InputBinaryPin"/> class.
/// </summary>
/// <param name="connection">The connection.</param>
/// <param name="pin">The pin.</param>
public Pcf8574InputBinaryPin(Pcf8574I2cConnection connection, Pcf8574Pin pin)
{
this.connection = connection;
this.pin = pin;
connection.SetInputPin(pin, true);
}
/// <summary>
/// Initializes a new instance of the <see cref="Pcf8574OutputBinaryPin"/> class.
/// </summary>
/// <param name="connection">The connection.</param>
/// <param name="pin">The pin.</param>
public Pcf8574OutputBinaryPin(Pcf8574I2cConnection connection, Pcf8574Pin pin)
{
this.connection = connection;
this.pin = pin;
connection.SetInputPin(pin, false);
}
private static Hd44780Configuration LoadPcf8574Configuration(IEnumerable<string> args)
{
var addressText = args.SkipWhile(s => !String.Equals(s, "pcf8574", 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 Pcf8574Pin clockPin = Pcf8574Pin.P2;
const Pcf8574Pin readWritePin = Pcf8574Pin.P1;
const Pcf8574Pin registerSelectPin = Pcf8574Pin.P0;
const Pcf8574Pin backlightPin = Pcf8574Pin.P3;
var dataPins = new[]
{
Pcf8574Pin.P4,
Pcf8574Pin.P5,
Pcf8574Pin.P6,
Pcf8574Pin.P7
};
Console.WriteLine();
Console.WriteLine("Using I2C connection over PCF8574 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: {0}", readWritePin);
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 Pcf8574I2cConnection(driver.Connect(address));
return new Hd44780Configuration(driver)
{
Pins = new Hd44780Pins(
connection.Out(registerSelectPin),
connection.Out(clockPin),
dataPins.Select(p => (IOutputBinaryPin)connection.Out(p)))
{
Backlight = connection.Out(backlightPin),
ReadWrite = connection.Out(readWritePin),
}
};
}