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Author Topic: New library: RGB GLCD (LDS183 Controller)  (Read 11182 times)
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I just got an arduino (My first one so bear with me as I am new to this) and the LDS183.  With your code I've gotten it going with very little trouble.  Thank you for that!

I do have a couple of questions though

First when I display white text on a black background there appears to be white vertical lines  through the text 1 pixel wide (like the pipe charecter "|") at a couple of places making the text harder to read.  Is there a way to eliminate those lines?

Second, is there a way to make the text bigger?  If I need to I'm happy to do some reading or coding.  I just don't have a clue where to look.

Thanks again,

Loren
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@Loren:

Can you post an image of the vertical bars, or post / send me your sketch?

It is possible to get bigger text, but it will involve a rather large modification to the code. You can take a look at my ITDB02_Graph libraries for ideas on how to do it. They both support small and large font.

/Henning
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Thanks For your help!

Here are a couple pictures:






And here is the code:

Code:
// RGB_GLCD_Bitmap (C)2010 Henning Karlsen
// web: http://www.henningkarlsen.com/electronics
//
// This program is a demo of the drawBitmap()-function.
//

#include "RGB_GLCD.h"
#include <avr/pgmspace.h>

GLCD myGLCD;

extern unsigned int icon1[0x400];
extern unsigned int icon2[0x400];
extern unsigned int tux[0x1000];

void setup()
{
  myGLCD.initLCD();
  //myGLCD.clrScr();
        myGLCD.fillScr(255,255,255);
  //myGLCD.setColor(255,255,255);
  myGLCD.print("Hello World Init",CENTER,5,255,255,255);
 
 
  // Draw a moving sinewave
  
   byte buf[126];
  int x, x2;
  int y, y2;
  int r;
  x=1;
  for (int i=1; i<3654; i++)
  {
    x++;
    if (x==127)
      x=1;
    if (i>127)
    {
      if ((x==63)||(buf[x-1]==63))
        myGLCD.setColor(0,0,255);
      else
        myGLCD.setColor(255,255,255);
      myGLCD.drawPixel(x,buf[x-1]);
    }
    myGLCD.setColor(0,255,255);
    y=63+(sin(((i*1.3)*3.14)/180)*50);
    myGLCD.drawPixel(x,y);
    buf[x-1]=y;
//    delay(3);
  }
  delay(5000);
  myGLCD.clrScr();
  myGLCD.fillScr(255,255,255);
}

void loop()
{
myGLCD.setColor(0,0,0);
  myGLCD.print("Blinking Message", CENTER,5,255,255,255);
    myGLCD.print("Line 2 stuff", CENTER,15,255,255,255);
  
 delay(1000);
 myGLCD.setColor(255,255,255);
 myGLCD.print("Blinking Message", CENTER,5,0,0,0);
 myGLCD.setColor(0,0,0);
 myGLCD.print("Line 2 stuff", CENTER,15,255,255,255);
 delay(1000);
  myGLCD.setColor(0,0,0);
 myGLCD.print("Blinking Message", CENTER,5,255,255,255);
 myGLCD.setColor(255,255,255);
 myGLCD.print("Line 2 stuff", CENTER,15,0,0,0);
 delay(1000);
 
}

I have downloaded the graph code and will try and figure out the Large Font stuff.  

Thank you again for your help.

Loren
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I'll look into the problem, but it might take a couple of days...

/Hennning
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Quote
I'll look into the problem, but it might take a couple of days...

/Hennning

Thank you very much...Take your time!
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RGB_GLCD v1.6 has been released

  • Fixed a bug in the print() function when using a background color different from the screen background color.

Any further updates to the library will only be announced on my website: http://www.henningkarlsen.com/electronics/
All site news is available as a RSS-feed.

@Loren: This new version should solve your problem with vertical lines smiley

/Henning
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Henning,

I just started using your library. It looks very nice. There are some things I like about it - mainly the fairly full featured print implementation. I have also been using a (expensive) 4D board, and the available libraries are a mess compared to your's. The 4D board with it's onboard processor and memory card is pretty fast.

I want faster screen redraw with bitmaps, as the current speed is just not useful for my application. smiley-grin

I see you have put in the basic commands to deal with using the PCF8833 RAM. I am hoping the RAM would allow for faster screen drawing. I want to put an SPI EEPROM with images on the SPI with the display and load the images at startup.

You are clearly fairly experienced with this display, and I was wondering if you have any advice on this task?


Thank you!

Robert
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You are clearly fairly experienced with this display, and I was wondering if you have any advice on this task?

I am sorry, but I can help you there. The main problem as I see is not the speed of the display, but the speed which the ATmega can push data to the display.

/Henning
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Doc Henning,

I do realize the arduino is the bottle neck. My plan was a 'Loading' splash screen with a little progress bar. Like video games. (I am making a game, in fact).

I want a few sprites, icons, and images in the RAM at program start.. Probably about 80k.. I will be putting the images into a I2C Serial 128K or 256K EEPROM (24LC128\256) - then using the Arduino to read from EEPROM to display RAM.

I am gonna make it work.. I think the process is:

1)Load appropriate data from EEPROM into a byte array
2)Send RAM Access X\Y command to display
3) Send data from byte array to display RAM
4)Cancel RAM writing by sending any other command
5)To restore from RAM, use the 'read sector\column' code.

I will be working on it. I am not that good at writing communication routines with all of the bytes, timing, and bits and whatnot - but I can usually make things work when i want them to.

Thank you for the library! It is awesome.

Robert
« Last Edit: January 20, 2011, 01:38:55 pm by moutonnoir » Logged

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Uh Ohhhhh..

Let me ask: Is there even RAM available on the display for what I am describing, or is this 209K just the 132x132x12bit 'Screen RAM'  which displays immediately when filled?

What is the major bottle neck? I do not need scolling sprites or animation or anything - but i do want to be able to display full screen images without having to watch them draw. I also want to be able to make menus using my web design techniques - which requires a few images in memory at once - or loading to memory much faster.


Is the bottleneck the SPI interface? Is it 8 or 9-bit? Is the 9-bit only for displays 132x132, not 128x128? Are you using bit banging or library SPI commands? Is SPI the major bottleneck because of throughput potential - or just implementation? Are there any first places you would look to get some speed increases? Would parallel mode be faster?

I am going to upload some videos and link them - of my menu system as it is implemented on a 4D systems board. I really do not like the 4D systems stuff that much though - and want to use your library.

finally, do you know about any other displays? What about using this display in an actual manufacturing project? I am working towards manufacturing something with an LCD, and currently these Phillips screens are the cheapest option I have found.
« Last Edit: January 20, 2011, 02:23:24 pm by moutonnoir » Logged

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I am sorry, but I cant help you. I am not an expert on these displays.

My library is based on the demo-code provided by NKC Electronics, so you might be better off asking them these questions.

Please keep in mind that this was also my first Arduino "project" ever, so I basically made it to learn more about the Arduino, and its environment.

/Henning
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Thanks so much for doing this library - it works great!

I did get hung up on the print function not allowing String, so I added an overload:

void GLCD::print(String st, byte x, byte y, byte r, byte g, byte b)
{
  int stl, i;
  
  stl = st.length();
  if (x==RIGHT)
        x=128-(stl*6);
  if (x==CENTER)
        x=(128-(stl*6))/2;
  
  for (i=0; i<stl; i++)
    printChar(st.charAt(i), x + (i*6), y, r, g, b);
}

If this is useful to anyone, just add this after the print definition in the library code - and add a corresponding header line.

Robert
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