private static Hd44780Configuration LoadMcp23017Configuration(IEnumerable <string> args)
{
var addressText = args.SkipWhile(s => !String.Equals(s, "mcp23017", 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 Mcp23017Pin registerSelectPin = Mcp23017Pin.B7;
const Mcp23017Pin clockPin = Mcp23017Pin.B5;
var dataPins = new[]
{
Mcp23017Pin.B1,
Mcp23017Pin.B2,
Mcp23017Pin.B3,
Mcp23017Pin.B4
};
Console.WriteLine();
Console.WriteLine("Using I2C connection over MCP23017 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: VCC");
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 Mcp23017I2cConnection(driver.Connect(address));
return(new Hd44780Configuration(driver)
{
Pins = new Hd44780Pins(
connection.Out(registerSelectPin),
connection.Out(clockPin),
dataPins.Select(pin => (IOutputBinaryPin)connection.Out(pin)))
});
}
private static Hd44780Configuration LoadI2cConfiguration()
{
const Mcp23017Pin registerSelectPin = Mcp23017Pin.B0;
const Mcp23017Pin clockPin = Mcp23017Pin.B1;
var dataPins = new[]
{
Mcp23017Pin.B2,
Mcp23017Pin.B3,
Mcp23017Pin.B4,
Mcp23017Pin.B5
};
Console.WriteLine();
Console.WriteLine("Using I2C connection");
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();
const ConnectorPin sdaPin = ConnectorPin.P1Pin03;
const ConnectorPin sclPin = ConnectorPin.P1Pin05;
var driver = new I2cDriver(sdaPin.ToProcessor(), sclPin.ToProcessor());
driver.ClockDivider = 2048;
var connection = new Mcp23017I2cConnection(driver.Connect(0x20));
return(new Hd44780Configuration(driver)
{
RegisterSelect = connection.Out(registerSelectPin),
Clock = connection.Out(clockPin),
Data = dataPins.Select(pin => connection.Out(pin))
});
}