/// <summary>
/// A small test that shows something useful. It may not work optimally due to wrong character mappings if the month names contain non-ascii characters.
/// </summary>
static void TestClock(Hd44780 lcd)
{
using (System.Timers.Timer timer = new System.Timers.Timer(100))
{
object myLock = new object();
timer.Elapsed += (o, e) =>
{
// The callback may be executed in parallel several times, but the display component is not reentrant!
if (Monitor.TryEnter(myLock))
{
var now = DateTime.Now;
lcd.SetCursorPosition(0, 0);
lcd.Write(String.Format(CultureInfo.CurrentCulture, "{0:dddd}", now));
lcd.SetCursorPosition(0, 1);
lcd.Write(String.Format(CultureInfo.CurrentCulture, "{0:M} {0:yyyy}", now, now));
lcd.SetCursorPosition(0, 2);
lcd.Write("It is now ");
lcd.SetCursorPosition(0, 3);
lcd.Write(String.Format(CultureInfo.CurrentCulture, "{0}", now.ToLongTimeString()));
Monitor.Exit(myLock);
}
};
timer.AutoReset = true;
timer.Enabled = true;
Console.ReadLine();
}
}
private static void SetCursorTest(Hd44780 lcd)
{
Size size = lcd.Size;
int number = 0;
for (int i = 0; i < size.Height; i++)
{
lcd.SetCursorPosition(0, i);
lcd.Write($"{number++}");
lcd.SetCursorPosition(size.Width - 1, i);
lcd.Write($"{number++}");
}
}
private static void CharacterSet(Hd44780 lcd)
{
StringBuilder sb = new StringBuilder(256);
for (int i = 0; i < 256; i++)
{
sb.Append((char)i);
}
int character = 0;
int line = 0;
Size size = lcd.Size;
while (character < 256)
{
lcd.SetCursorPosition(0, line);
lcd.Write(sb.ToString(character, Math.Min(size.Width, 256 - character)));
line++;
character += size.Width;
if (line >= size.Height)
{
line = 0;
System.Threading.Thread.Sleep(1000);
}
}
}
private static void WalkerTest(Hd44780 lcd)
{
CreateWalkCharacters(lcd);
string walkOne = new string('\x8', lcd.Size.Width);
string walkTwo = new string('\x9', lcd.Size.Width);
for (int i = 0; i < 5; i++)
{
lcd.SetCursorPosition(0, 0);
lcd.Write(walkOne);
System.Threading.Thread.Sleep(500);
lcd.SetCursorPosition(0, 0);
lcd.Write(walkTwo);
System.Threading.Thread.Sleep(500);
}
}
private static void WriteFromEnd(Hd44780 lcd, string value)
{
lcd.Increment = false;
lcd.SetCursorPosition(lcd.Size.Width - 1, lcd.Size.Height - 1);
lcd.Write(value);
lcd.Increment = true;
}
static async Task App()
{
var board = await ConnectionService.Instance.GetFirstDeviceAsync();
await board.ConnectAsync();
// configure the native parallel interface with the pins we're using
board.ParallelInterface.RegisterSelectPin = board.Pins[0];
board.ParallelInterface.ReadWritePin = board.Pins[1];
board.ParallelInterface.EnablePin = board.Pins[2];
board.ParallelInterface.DataBus.Add(board.Pins[3]);
board.ParallelInterface.DataBus.Add(board.Pins[4]);
board.ParallelInterface.DataBus.Add(board.Pins[5]);
board.ParallelInterface.DataBus.Add(board.Pins[6]);
board.ParallelInterface.DataBus.Add(board.Pins[7]);
board.ParallelInterface.DataBus.Add(board.Pins[8]);
board.ParallelInterface.DataBus.Add(board.Pins[9]);
board.ParallelInterface.DataBus.Add(board.Pins[10]);
var display = new Hd44780(board.ParallelInterface, 16, 2);
await display.WriteLine("The time is:").ConfigureAwait(false);
while (true)
{
await display.Write(DateTime.Now.ToLongTimeString()).ConfigureAwait(false);
await display.SetCursorPosition(0, 1).ConfigureAwait(false);
await Task.Delay(1000).ConfigureAwait(false);
}
}
public static void Test()
{
Console.WriteLine("Starting...");
#if USEI2C
var i2cDevice = new UnixI2cDevice(new I2cConnectionSettings(busId: 1, deviceAddress: 0x21));
var controller = new Mcp23008Adapter(new Mcp23008(i2cDevice));
var lcd = new Hd44780(registerSelect: 1, enable: 2, data: new int[] { 3, 4, 5, 6 }, size: new Size(16, 2), backlight: 7, controller: controller);
#else
Hd44780 lcd = new Hd44780(12, 26, new int[] { 16, 17, 18, 19, 20, 21, 22, 23 }, new Size(20, 4), readWrite: 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);
// 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...");
}
}
}