private void DisplayLcdText(string line1 = "No data", string line2 = "")
{
lcd.Clear();
lcd.SetCursorPosition(0, 0);
lcd.Write(line1);
lcd.SetCursorPosition(0, 1);
lcd.Write(line2);
}
public void TestMethod1()
{
using (Lcd1602 lcd = new Lcd1602(new I2CMock("/dev/i2c-1", 0x27))) //0x27 address of LCD
{
Console.WriteLine("Init");
lcd.Init();
Console.WriteLine("Clear");
lcd.Clear();
Console.WriteLine("Hello");
lcd.Write(0, 0, "Hello");
Console.WriteLine("World!");
lcd.Write(0, 1, "World!");
}
}
/// <summary>
/// This sets up a 16x2 character LCD, directly connected to a set of GPIO pins, with a hardwired or no backlight and 4 Bit commands
/// </summary>
private static void UsingGpioPins()
{
using (Lcd1602 lcd = new Lcd1602(registerSelectPin: 22, enablePin: 17, dataPins: new int[] { 25, 24, 23, 18 }))
{
lcd.Clear();
lcd.Write("Hello World");
}
}
/// <summary>
/// This program will print `Hello World`
/// </summary>
/// <param name="args">Should be empty</param>
static void Main(string[] args)
{
// Sets up a 16x2 character LCD with a hardwired or no backlight.
using (Lcd1602 lcd = new Lcd1602(registerSelectPin: 22, enablePin: 17, dataPins: new int[] { 25, 24, 23, 18 }))
{
lcd.Clear();
lcd.Write("Hello World");
}
}
/// <summary>
/// This program will print `Hello World`
/// </summary>
/// <param name="args">Should be empty</param>
static void Main(string[] args)
{
// Sets up a 16x2 character LCD with a hardwired or no backlight.
using (Lcd1602 lcd = new Lcd1602(registerSelect: 1, enable: 2, data: new int[] { 3, 4, 5, 6 }))
{
lcd.Clear();
lcd.Write("Hello World");
}
}
/// <summary>
/// This method will use an mcp gpio extender to connect to the LCM display.
/// This has been tested on the CrowPi lcd display.
/// </summary>
static void UsingMcp()
{
UnixI2cDevice i2CDevice = new UnixI2cDevice(new I2cConnectionSettings(1, 0x21));
Mcp23008 mcpDevice = new Mcp23008(i2CDevice);
int[] dataPins = { 3, 4, 5, 6 };
int registerSelectPin = 1;
int enablePin = 2;
int backlight = 7;
using (mcpDevice)
using (Lcd1602 lcd = new Lcd1602(registerSelectPin, enablePin, dataPins, backlight, controller: mcpDevice))
{
lcd.Clear();
lcd.Write("Hello World");
lcd.SetCursorPosition(0, 1);
lcd.Write(".NET Core");
}
}
/// <summary>
/// This method will use an mcp gpio extender to connect to the LCM display.
/// This has been tested on the CrowPi lcd display.
/// </summary>
private static void UsingMcp()
{
I2cDevice i2CDevice = I2cDevice.Create(new I2cConnectionSettings(1, 0x21));
Mcp23008 driver = new Mcp23008(i2CDevice);
int[] dataPins = { 3, 4, 5, 6 };
int registerSelectPin = 1;
int enablePin = 2;
int backlight = 7;
using (driver)
using (Lcd1602 lcd = new Lcd1602(registerSelectPin, enablePin, dataPins, backlight, controller: new GpioController(PinNumberingScheme.Logical, driver)))
{
lcd.Clear();
lcd.Write("Hello World");
lcd.SetCursorPosition(0, 1);
lcd.Write(".NET Core");
}
}
static void Main(string[] args)
{
Lcd1602 lcd = new Lcd1602(I2cDevice.Create(new I2cConnectionSettings(1, DefaultLcdAddress)))
{
DisplayOn = true,
BacklightOn = true,
BlinkingCursorVisible = true,
Increment = true,
};
lcd.Write("Hello, World!");
}
public async Task DisplayText(string text)
{
int screenWidth = 16;
string padding = new string(' ', screenWidth);
string paddedText = $"{padding}{text}{padding}";
_lcd.Clear();
for (int i = 0; i <= (text.Length + screenWidth); i++)
{
string frame = paddedText.Substring(i, screenWidth);
_lcd.SetCursorPosition(0, 0);
_lcd.Write(frame);
await Task.Delay(TimeSpan.FromMilliseconds(250));
}
}
static void Test1602()
{
using (Lcd1602 lcd = new Lcd1602(new I2C("/dev/i2c-1", 0x27))) //0x27 address of LCD
{
lcd.Init();
lcd.Clear();
var screenWidth = 16;
var message = "Hello Krysia, how are you today?";
var text = message.PadLeft(message.Length + screenWidth).PadRight(message.Length + 2 * screenWidth);
for (var i = 0; i < text.Length - screenWidth + 1; i++)
{
lcd.Write(0, 0, text.Substring(i, screenWidth));
Thread.Sleep(250);
}
}
}
public static void SampleEntryPoint()
{
Console.WriteLine("Starting...");
// for PCF8574T i2c addresses can be between 0x27 and 0x20 depending on bridged solder jumpers
// for PCF8574AT i2c addresses can be between 0x3f and 0x38 depending on bridged solder jumpers
var i2cDevice = I2cDevice.Create(new I2cConnectionSettings(busId: 1, deviceAddress: 0x27));
var driver = new Pcf8574(i2cDevice);
var lcd = new Lcd1602(registerSelectPin: 0, enablePin: 2, dataPins: new int[] { 4, 5, 6, 7 }, backlightPin: 3, readWritePin: 1, controller: new GpioController(PinNumberingScheme.Logical, driver));
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...");
}
}
}