7 replies to this topic

[BowWowTama]

using System;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;
using MicroLiquidCrystal;

namespace LCD_display
{
	public class Program
	{
		public static void Main()
		{
			GpioLcdTransferProvider LCD_provider = new GpioLcdTransferProvider
			(
			rs: Pins.GPIO_PIN_D9,
			enable: Pins.GPIO_PIN_D8,
			d4: Pins.GPIO_PIN_D3,
			d5: Pins.GPIO_PIN_D2,
			d6: Pins.GPIO_PIN_D1,
			d7: Pins.GPIO_PIN_D0
			);

			Lcd LCD_display = new Lcd(LCD_provider);

			LCD_display.Begin(16, 2);
			LCD_display.BlinkCursor = true;
			LCD_display.ShowCursor = true;

			LCD_display.SetCursorPosition(0, 0);
			LCD_display.Write("LCD Display 1");
			
			uint sec = 0;

			while (true)
			{
				LCD_display.SetCursorPosition(0, 1);
				LCD_display.Write(sec.ToString());
				Thread.Sleep(1000);
				sec++;
			}
		}
	}
}

Hi there, Sorry for my poor English first.

I have been wiring LCD U44780 and found a thread about LCD library at the link as follows
http://forums.netdui...ut-a-shift-reg/

I used a dll from the attached file and succeeded to run the LCD.

but as you can see from the attached picture above, it displays broken characters.
The code I made is simple program that displaying the seconds elapsed.

Regards.

[Stefan]

I used a dll from the attached file and succeeded to run the LCD.

Did you forget something by any chance?

[BowWowTama]

Did you forget something by any chance?

Um....
I added "MicroLiquidCrystal.dll" to the reference items.

It displays like this.
first row : LCD display 1 <- no problem.

second row : 1, 2, 3, 4, 5, >(What the!), 6, 7, 8, 9, 10, ?(What?), ...
and as the time goes by, it ignores its column and displays like the picture attached and displays as follows.
123_vw, 123_v), 123_v^ (It should display 123, 124, 125)

Thanks for your reply.

[BowWowTama]

Problem solved!

I removed these two lines.

LCD_display.BlinkCursor = true;
LCD_display.ShowCursor = true;

but why?

[Stefan]

as the time goes by

Just trying to get clear what the exact problem is. After some time the loop behaves differently, am I correct?
That sounds like a loose contact, where sometimes bits are getting lost. Is the issue consistent?
I mean, does it always show the exact same mistakes, or do they vary?

[BowWowTama]

Just trying to get clear what the exact problem is. After some time the loop behaves differently, am I correct?
That sounds like a loose contact, where sometimes bits are getting lost. Is the issue consistent?
I mean, does it always show the exact same mistakes, or do they vary?

It varies and is consistent. Sometimes, it breaks characters when 19 secs collapsed and sometimes 24 secs and after that, the problem continues.

Anyway, problem has been solved and thanks for your attention.

Regards.

[Stefan]

Anyway, problem has been solved and thanks for your attention.

Now I'm curious, what did you do to solve it? Was it a loose connection?

[BowWowTama]

Now I'm curious, what did you do to solve it? Was it a loose connection?

Maybe it is a loose connection. but actually, I solved problem by removing two lines as described above.

LCD_display.BlinkCursor = true;
LCD_display.ShowCursor = true;