/// <summary>
/// Initializes a new HD44780 LCD controller.
/// </summary>
/// <param name="size">The logical size of the LCD.</param>
/// <param name="interface">The interface to use with the LCD.</param>
public Hd44780(Size size, LcdInterface @interface)
{
Size = size;
_interface = @interface;
Initialize(size.Height);
_rowOffsets = InitializeRowOffsets(size.Height);
}
private static (ITextDisplayDevice, IDisposable) Create(GpioController gpioController)
{
var lcdInterface = LcdInterface.CreateGpio(ToChipPin(29), ToChipPin(32),
new[] { ToChipPin(31), ToChipPin(33), ToChipPin(35), ToChipPin(37) },
controller: gpioController,
shouldDispose: false);
var hd44780 = new Lcd1602(lcdInterface);
return(new Sundew.TextView.Iot.Devices.Drivers.LcdTextDisplayDevice(hd44780, "A00"), hd44780);
}
/// <summary>
/// This method will use I2C commands to talk to the display. The display is expected to be at address 0x27 and accept 4 bit commands.
/// This runs a full test suite against the display.
/// </summary>
static void UsingHd44780OverI2C()
{
using (I2cDevice i2CDevice = I2cDevice.Create(new I2cConnectionSettings(1, 0x27)))
{
LcdInterface lcdInterface = LcdInterface.CreateI2c(i2CDevice, false);
using (Hd44780 hd44780 = new Lcd2004(lcdInterface))
{
hd44780.UnderlineCursorVisible = false;
hd44780.BacklightOn = true;
hd44780.DisplayOn = true;
hd44780.Clear();
ExtendedSample.Test(hd44780);
}
}
}
/// <summary>
/// This method will use I2C commands to talk to the display. The display is expected to be at address 0x27 and accept 4 bit commands.
/// This runs a full test suite against the display.
/// </summary>
private static void UsingHd44780OverI2C()
{
using (I2cDevice i2CDevice = I2cDevice.Create(new I2cConnectionSettings(1, 0x27)))
{
LcdInterface lcdInterface = LcdInterface.CreateI2c(i2CDevice, false);
using (Hd44780 hd44780 = new Lcd2004(lcdInterface))
{
hd44780.UnderlineCursorVisible = false;
hd44780.BacklightOn = true;
hd44780.DisplayOn = true;
hd44780.Clear();
Console.WriteLine("Display initialized. Press Enter to start tests.");
Console.ReadLine();
LcdConsoleSamples.WriteTest(hd44780);
ExtendedSample.Test(hd44780);
}
}
}
public static void Test()
{
Console.WriteLine("Starting...");
#if USEI2C
var i2cDevice = I2cDevice.Create(new I2cConnectionSettings(busId: 1, deviceAddress: 0x21));
var controller = new Mcp23008(i2cDevice);
var lcd = new Lcd1602(registerSelectPin: 1, enablePin: 2, dataPins: new int[] { 3, 4, 5, 6 }, backlightPin: 7, controller: controller);
#elif USERGB
var i2cLcdDevice = I2cDevice.Create(new I2cConnectionSettings(busId: 1, deviceAddress: 0x3E));
var i2cRgbDevice = I2cDevice.Create(new I2cConnectionSettings(busId: 1, deviceAddress: 0x62));
var lcd = new LcdRgb1602(i2cLcdDevice, i2cRgbDevice);
#else
Hd44780 lcd = new Hd44780(new Size(20, 4), LcdInterface.CreateGpio(12, 26, new int[] { 16, 17, 18, 19, 20, 21, 22, 23 }, readWritePin: 13));
#endif
using (lcd)
{
Console.WriteLine("Initialized");
Console.ReadLine();
TestPrompt("SetCursor", lcd, SetCursorTest);
TestPrompt("Underline", lcd, l => l.UnderlineCursorVisible = true);
lcd.UnderlineCursorVisible = false;
TestPrompt("Walker", lcd, WalkerTest);
CreateTensCharacters(lcd);
TestPrompt("CharacterSet", lcd, CharacterSet);
// Shifting
TestPrompt("Autoshift", lcd, AutoShift);
TestPrompt("DisplayLeft", lcd, l => ShiftDisplayTest(l, a => a.ShiftDisplayLeft()));
TestPrompt("DisplayRight", lcd, l => ShiftDisplayTest(l, a => a.ShiftDisplayRight()));
TestPrompt("CursorLeft", lcd, l => ShiftCursorTest(l, a => a.ShiftCursorLeft()));
TestPrompt("CursorRight", lcd, l => ShiftCursorTest(l, a => a.ShiftCursorRight()));
// Long string
TestPrompt("Twenty", lcd, l => l.Write(Twenty));
TestPrompt("Fourty", lcd, l => l.Write(Fourty));
TestPrompt("Eighty", lcd, l => l.Write(Eighty));
TestPrompt("Twenty-", lcd, l => WriteFromEnd(l, Twenty));
TestPrompt("Fourty-", lcd, l => WriteFromEnd(l, Fourty));
TestPrompt("Eighty-", lcd, l => WriteFromEnd(l, Eighty));
TestPrompt("Wrap", lcd, l => l.Write(new string('*', 80) + ">>>>>"));
TestPrompt("Perf", lcd, PerfTests);
#if USERGB
TestPrompt("Colors", lcd, SetBacklightColorTest);
#endif
// Shift display right
lcd.Write("Hello .NET!");
try
{
int state = 0;
Timer timer = new Timer(1000);
timer.Elapsed += (o, e) =>
{
lcd.SetCursorPosition(0, 1);
lcd.Write(DateTime.Now.ToLongTimeString() + " ");
if (state == 0)
{
state = 1;
}
else
{
lcd.ShiftDisplayRight();
state = 0;
}
};
timer.AutoReset = true;
timer.Enabled = true;
Console.ReadLine();
}
finally
{
lcd.DisplayOn = false;
lcd.BacklightOn = false;
Console.WriteLine("Done...");
}
}
}
