public LcdConnection(IGpioConnectionDriver driver)
{
log.Debug(m => m("Init LCD connection"));
var lcdSettings = new Hd44780LcdConnectionSettings
{
ScreenWidth = Columns,
ScreenHeight = Rows,
//Encoding = Encoding.ASCII
};
var dataPins = new[]
{
ConnectorPin.P1Pin31,
ConnectorPin.P1Pin33,
ConnectorPin.P1Pin35,
ConnectorPin.P1Pin37
}
.Select(p => (IOutputBinaryPin)driver.Out(p))
.ToArray();
var lcdPins = new Hd44780Pins(
driver.Out(ConnectorPin.P1Pin40),
driver.Out(ConnectorPin.P1Pin38),
dataPins);
_lcdConnection = new Hd44780LcdConnection(lcdSettings, lcdPins);
// init additonal characters
_lcdConnection.SetCustomCharacter(0x0, new byte[] { 0x8, 0xc, 0xe, 0xf, 0xe, 0xc, 0x8 }); // play
_lcdConnection.SetCustomCharacter(0x1, new byte[] { 0x0, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x0 }); // pause
_lcdConnection.SetCustomCharacter(0x2, new byte[] { 0x0, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x0 }); // stop
}
/// <summary>
/// Initializes a new instance of the <see cref="Hd44780LcdConnection" /> class.
/// </summary>
/// <param name="settings">The settings.</param>
/// <param name="pins">The pins.</param>
/// <exception cref="System.ArgumentOutOfRangeException">
/// dataPins;There must be either 4 or 8 data pins
/// or
/// settings;ScreenHeight must be between 1 and 4 rows
/// or
/// settings;PatternWidth must be 5 pixels
/// or
/// settings;PatternWidth must be either 7 or 10 pixels height
/// </exception>
/// <exception cref="System.ArgumentException">
/// At most 80 characters are allowed
/// or
/// 10 pixels height pattern cannot be used with 2 rows
/// </exception>
public Hd44780LcdConnection(Hd44780LcdConnectionSettings settings, Hd44780Pins pins)
{
settings = settings ?? new Hd44780LcdConnectionSettings();
this.pins = pins;
if (pins.Data.Length != 4 && pins.Data.Length != 8)
throw new ArgumentOutOfRangeException("pins", pins.Data.Length, "There must be either 4 or 8 data pins");
width = settings.ScreenWidth;
height = settings.ScreenHeight;
if (height < 1 || height > MAX_HEIGHT)
throw new ArgumentOutOfRangeException("settings", height, "ScreenHeight must be between 1 and 4 rows");
if (width * height > MAX_CHAR)
throw new ArgumentException("At most 80 characters are allowed");
if (settings.PatternWidth != 5)
throw new ArgumentOutOfRangeException("settings", settings.PatternWidth, "PatternWidth must be 5 pixels");
if (settings.PatternHeight != 8 && settings.PatternHeight != 10)
throw new ArgumentOutOfRangeException("settings", settings.PatternWidth, "PatternWidth must be either 7 or 10 pixels height");
if (settings.PatternHeight == 10 && (height % 2) == 0)
throw new ArgumentException("10 pixels height pattern cannot be used with an even number of rows");
functions = (settings.PatternHeight == 8 ? Functions.Matrix5x8 : Functions.Matrix5x10)
| (height == 1 ? Functions.OneLine : Functions.TwoLines)
| (pins.Data.Length == 4 ? Functions.Data4bits : Functions.Data8bits);
entryModeFlags = /*settings.RightToLeft
? EntryModeFlags.EntryRight | EntryModeFlags.EntryShiftDecrement
:*/ EntryModeFlags.EntryLeft | EntryModeFlags.EntryShiftDecrement;
encoding = settings.Encoding;
BacklightEnabled = false;
if (pins.ReadWrite != null)
pins.ReadWrite.Write(false);
pins.RegisterSelect.Write(false);
pins.Clock.Write(false);
foreach (var dataPin in pins.Data)
dataPin.Write(false);
WriteByte(0x33, false); // Initialize
WriteByte(0x32, false);
WriteCommand(Command.SetFunctions, (int) functions);
WriteCommand(Command.SetDisplayFlags, (int) displayFlags);
WriteCommand(Command.SetEntryModeFlags, (int) entryModeFlags);
Clear();
BacklightEnabled = true;
}
public RaspSharpView()
{
const ConnectorPin registerSelectPin = ConnectorPin.P1Pin22;
const ConnectorPin clockPin = ConnectorPin.P1Pin18;
var dataPins = new[]
{
ConnectorPin.P1Pin16,
ConnectorPin.P1Pin15,
ConnectorPin.P1Pin13,
ConnectorPin.P1Pin11
};
var driver = GpioConnectionSettings.DefaultDriver;
var pins = new Hd44780Pins(
driver.Out(registerSelectPin),
driver.Out(clockPin),
dataPins.Select(p => (IOutputBinaryPin) driver.Out(p)));
var settings = new Hd44780LcdConnectionSettings();
_lcd = new Hd44780LcdConnection(settings, pins);
}
/// <summary>
/// Initializes a new instance of the <see cref="Hd44780LcdConnection" /> class.
/// </summary>
/// <param name="settings">The settings.</param>
/// <param name="pins">The pins.</param>
/// <exception cref="System.ArgumentOutOfRangeException">
/// dataPins;There must be either 4 or 8 data pins
/// or
/// settings;ScreenHeight must be between 1 and 4 rows
/// or
/// settings;PatternWidth must be 5 pixels
/// or
/// settings;PatternWidth must be either 7 or 10 pixels height
/// </exception>
/// <exception cref="System.ArgumentException">
/// At most 80 characters are allowed
/// or
/// 10 pixels height pattern cannot be used with 2 rows
/// </exception>
public Hd44780LcdConnection(Hd44780LcdConnectionSettings settings, Hd44780Pins pins)
{
settings = settings ?? new Hd44780LcdConnectionSettings();
this.pins = pins;
if (pins.Data.Length != 4 && pins.Data.Length != 8)
{
throw new ArgumentOutOfRangeException("pins", pins.Data.Length, "There must be either 4 or 8 data pins");
}
width = settings.ScreenWidth;
height = settings.ScreenHeight;
if (height < 1 || height > MAX_HEIGHT)
{
throw new ArgumentOutOfRangeException("settings", height, "ScreenHeight must be between 1 and 4 rows");
}
if (width * height > MAX_CHAR)
{
throw new ArgumentException("At most 80 characters are allowed");
}
if (settings.PatternWidth != 5)
{
throw new ArgumentOutOfRangeException("settings", settings.PatternWidth, "PatternWidth must be 5 pixels");
}
if (settings.PatternHeight != 8 && settings.PatternHeight != 10)
{
throw new ArgumentOutOfRangeException("settings", settings.PatternWidth, "PatternWidth must be either 7 or 10 pixels height");
}
if (settings.PatternHeight == 10 && (height % 2) == 0)
{
throw new ArgumentException("10 pixels height pattern cannot be used with an even number of rows");
}
functions = (settings.PatternHeight == 8 ? Functions.Matrix5x8 : Functions.Matrix5x10)
| (height == 1 ? Functions.OneLine : Functions.TwoLines)
| (pins.Data.Length == 4 ? Functions.Data4bits : Functions.Data8bits);
entryModeFlags = /*settings.RightToLeft
* ? EntryModeFlags.EntryRight | EntryModeFlags.EntryShiftDecrement
* :*/EntryModeFlags.EntryLeft | EntryModeFlags.EntryShiftDecrement;
encoding = settings.Encoding;
BacklightEnabled = false;
if (pins.ReadWrite != null)
{
pins.ReadWrite.Write(false);
}
pins.RegisterSelect.Write(false);
pins.Clock.Write(false);
foreach (var dataPin in pins.Data)
{
dataPin.Write(false);
}
WriteByte(0x33, false); // Initialize
WriteByte(0x32, false);
WriteCommand(Command.SetFunctions, (int)functions);
WriteCommand(Command.SetDisplayFlags, (int)displayFlags);
WriteCommand(Command.SetEntryModeFlags, (int)entryModeFlags);
Clear();
BacklightEnabled = true;
}
