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);
        }
        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;
        }