Interfacing DISPLAYTECH 128x64 LCD

Started by Marcus Klein October 11, 2003
Hi all!

Is there anybody with some experience in interfacing the above display?
DISPLAYTECH only provides poor information about this device on their
website - I only found the pinout.
I need some information about adjust the LCD's contrast - the datasheet
only shows a pot between the pins
Vout and Vo. No value, no more.

I'd be happy if someone can give me some hints for a software-controlled
contrast-adjustment.

Btw.: Pins 19/20 are for backlight supply (Datasheet). What about the
two pads "LED+ / LED-" on the side
of the display-board ?!?

I have not ordered the display yet, I'm just doing the schematics for my
application. So any kind of information can
be used without etching a new PCB :-)

Thx 4 help.
Marcus


the wiper of the pot goes to Vee

do you have the DISPLAYTECH part number? ----- Original Message -----
From: "Marcus Klein" <klein@klei...>
To: "AVR-Chat" <AVR-Chat@AVR-...>; "AVR-Club"
<avrclub@avrc...>
Sent: Sunday, October 12, 2003 6:55 AM
Subject: [AVR club] Interfacing DISPLAYTECH 128x64 LCD Hi all!

Is there anybody with some experience in interfacing the above display?
DISPLAYTECH only provides poor information about this device on their
website - I only found the pinout.
I need some information about adjust the LCD's contrast - the datasheet
only shows a pot between the pins
Vout and Vo. No value, no more.

I'd be happy if someone can give me some hints for a software-controlled
contrast-adjustment.

Btw.: Pins 19/20 are for backlight supply (Datasheet). What about the
two pads "LED+ / LED-" on the side
of the display-board ?!?

I have not ordered the display yet, I'm just doing the schematics for my
application. So any kind of information can
be used without etching a new PCB :-)

Thx 4 help.
Marcus
To unsubscribe from this group, send an email to:
avrclub-unsubscribe@avrc...
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Marcus,
There is a German tutorial on this display I think it is at http://www.moddingtech.de/content.php?cat=modding&page=glcd
A schematic diagram is also on that page with the value of the pot. If you cannot read German, perhaps you can use a translator for the website. The project is based on connecting to the computer parallel port, but I think it might be helpful for your project.
Best regards,
-Mike
----- Original Message -----
From: Marcus Klein
To: AVR-Chat ; AVR-Club
Sent: Saturday, October 11, 2003 10:55 AM
Subject: [AVR club] Interfacing DISPLAYTECH 128x64 LCD Hi all!

Is there anybody with some experience in interfacing the above display?
DISPLAYTECH only provides poor information about this device on their
website - I only found the pinout.
I need some information about adjust the LCD's contrast - the datasheet
only shows a pot between the pins
Vout and Vo. No value, no more.

I'd be happy if someone can give me some hints for a software-controlled
contrast-adjustment.

Btw.: Pins 19/20 are for backlight supply (Datasheet). What about the
two pads "LED+ / LED-" on the side
of the display-board ?!?

I have not ordered the display yet, I'm just doing the schematics for my
application. So any kind of information can
be used without etching a new PCB :-)

Thx 4 help.
Marcus Yahoo! Groups Sponsor
To unsubscribe from this group, send an email to:
avrclub-unsubscribe@avrc...



this was done at
http://translation2.paralink.com/

Character-LCDs (e.g., 4x20) have nearly already become a Stanard in the
Casemodderszene.
Diagrammatic LCDs attain more and more in popularity, however, are not
spread up to now for a long time so far.
The advantages lie clearly on the hand: instead of preprogramed marks a
diagrammatic LCD can head for every pixel individually and show
therefore any marks and pictures.
In the Tutorial it is explained gradually how one assembles the hardware
and how one furnishes the software!
Required components
Pos article amount of price / piece
1 Displaytech 64128A Green / blue 1 49.90 / 69.90
2 level volume cables gray / color-coding 2 (= 2 meters) 0.87 / 1.35
To 3 patrol screen platinums 1 0.46
4 10k trick potentiometer 1 0.53
5 3.9 ohms opposition 1 W (with green lighting) or
10 ohms opposition 1 W (with blue lighting) 1 0.15
6 plugs D-SUB 1 0.14
7 5.25 " stream plugs 1 0.20
8 caps for plug D-SUB 1 0.17
9 instep tongs trick buttons 1 differently

Like you see you have with the display the choice between green and a
blue illuminated execution. With the cable you can dread between
completely and choose a cable with multi color veins. I recommend the
color-coding execution. One can orientate himself therefore while
connecting by the colors of the veins and bends forward therefore better
Verpolungen. The length depends on your application case. By internal
use there are 2 ms more than enough.
In this case the patrol screen platinum is very helpful, of course a
hole screen board also goes.
You select position 9, the instep tongs trick button for the
potentiometer just as one likes.
Of course can choose her also other components, on top verlinkten are
only examples. On the left you see at first sometimes the switch plan for the LCD.
As you see, he is not essentially complex as the switch plan for a
mark-based LCD.
Esteem: the switch plan should be used so only for green illuminated
displays.
With blue illuminated displays should be substituted of 3.9 ohms
opposition with 10 ohms opposition (R1).

One does the beginning best in the LCD himself. Now one solders a piece
of the volume cable to the 20Pins directly in the LCD. One solders other
side of the piece now at first 1:1 to the patrol screen platinum, so
that one has extended now the connections of the LCDs on the board. Now
for the further wiring one can solder in the board, and must not solder
directly in the LCD.

Here see her my lengthening to the board.
Now on the board you can carry out the further wiring after obigem
switch plan, e.g. all mass cables (GND) bring together, all plus cables
(+5V) bring together, the opposition and the Poti solder etc.
The Poti serves for the adjusting of the display contrast.

Then on other side of the board you solder the rest of the level volume
cable according to the switch plan. At the end of the cable you unpick the single veins, it rolls up so that
them in the realization of the parallel port-plug fit, and solders the
cables accordingly of the switch plan to the plug.
As one sees in the switch plan, one can connect the Pins 18-25 together
directly. This happens by a little bit unisolated Litze or directly with
Lzinn in the plug.

To the isolation the use of Schrumpfschlauch is recommended. This also
brings additional stability and complicates tearing off the Litze.

If everything is soldered ready, you must still connect in the switch
plan with +5V and GND to called places to a PC-stream plug (+5V = red
cable, cable GND=schwarzes).
You put out this best of all from the board, because you can well bring
together there the suitable cables.

You can fasten the LCD like it to You likes in the case or also
externally. I have to see it like in obigem picture in the front door of
my Chieftec case built-in.

With it you have already created the most difficult part of the
Tutorials, and now can turn to the software. For this there are for a
moment 2 possibilities.
On the one hand, there is LCDInfo of Henri Skippari, a Finn he offers a
good, friendly Support for his software and this also in future
developed. Other possibility is a Winamp Plug in from Eelco Schijf
called liquid MP3. At the moment that is considered Plug in LCDInfo with
the Winamp achievements.
But there should be in close future a version of LCDInfo which
compensates for the remains.

If we have a look at first at LCD info.

You can do the required files to You on this side downloaden.

You need at first the DriverLINX drivers down, and installs them by
starting "port95nt.exe". Then a new start is due for the first time.

Afterwards you still download LCD info even and entpackt. Now you still
need from obiger download side the file "Vcl50.zip". Entpackt the
contained file in the same list like LCD info.

Now can begin her "LCDInfo_config.exe".
Under "LCD Settings" one chooses KS0108 as a controller and puts the
right address of the LPT port. Then one goes on the register map
"Screens" and clicks on Load with "Screen Config". For the choice stand
all *.ini files which KS0108 contain in the name of. These are most in
the 128x64 pixel format which has our LCD.

In the ini files the data to be indicated as well as the background
picture to be used are deposited.

Now one clicks on " Saves Settings " and finishes the configuration
program. If one begins now LCDInfo with "LCDInfo.exe", the different
Screens would have to be indicated according to ini file on the LCD. Alternatively one can also sketch own Screens. One uses p. / W-Bilder of
the size 128x64 as a background. Then the rest in text and variables is
laid about the background. This information is deposited as mentioned in
the ini file.
How this has to look one can gaze after on the homepage of LCDInfo! liquid MP3
For Winamp-Screens bietes to itself as mentioned liquid MP3 in.

You find the download on this side. Like most LCD programs it supports
nowadays only Winamp 2.x. However, perhaps that will change in future.

The program likewise needs the DriverLINX drivers (port95nt.exe) which
must be likewise ready on obiger download side and be installed now
still.

Now starts manWinamp and rises option-> Preferences.
Now under Plug in> Visualization liquid MP3 v.x.x.x would have to stand
what one selects and clicks afterwards on "Configure". Here one chooses
"Load from file" and chooses any file of the size 128x64.liq. Error
messages are ignored sometimes provided that they should appear. under "
Select background " one chooses the matching 128x64 Bitmap (*.bmp) from
the installation list of liquid MP3.
Afterwards one selects to the control KS0108 as well as the correct
address of the LPT port under " hardware settings ". Under "Wiring"
likewise the KS0108. Now a click on " Saves Settings " and one starts
Plug in by click on "start". If one wants that Plug in by every start is
automatically begun by Winamp, one clicks on "Plug in"(Winamp
Preferences) and does a hook with " car execute Visualization plug in on
play ".

Result
In the end I might owe Henri for the program LCDInfo. In addition, he
has sketched the switch plan and stood by me with problems with support.
He would be glad about support in every regard. Besides thanks also
count in Eelco to his highly competitive Plug in. On the homepages of
both programs there are forums into English language to which one can
turn any time and gets good help.
Who has his LCD ready, case) cannot put pictures of the LCD (in the
Gallery of LCD-Gallery. ----- Original Message -----
From: "Mike Putnam" <circuit@circ...>
To: <avrclub@avrc...>
Sent: Sunday, October 12, 2003 11:42 AM
Subject: Re: [AVR club] Interfacing DISPLAYTECH 128x64 LCD Marcus,
There is a German tutorial on this display I think it is at
http://www.moddingtech.de/content.php?cat=modding&page=glcd
A schematic diagram is also on that page with the value of the pot. If
you cannot read German, perhaps you can use a translator for the
website. The project is based on connecting to the computer parallel
port, but I think it might be helpful for your project.
Best regards,
-Mike
----- Original Message -----
From: Marcus Klein
To: AVR-Chat ; AVR-Club
Sent: Saturday, October 11, 2003 10:55 AM
Subject: [AVR club] Interfacing DISPLAYTECH 128x64 LCD Hi all!

Is there anybody with some experience in interfacing the above
display?
DISPLAYTECH only provides poor information about this device on their
website - I only found the pinout.
I need some information about adjust the LCD's contrast - the
datasheet
only shows a pot between the pins
Vout and Vo. No value, no more.

I'd be happy if someone can give me some hints for a
software-controlled
contrast-adjustment.

Btw.: Pins 19/20 are for backlight supply (Datasheet). What about the
two pads "LED+ / LED-" on the side
of the display-board ?!?

I have not ordered the display yet, I'm just doing the schematics for
my
application. So any kind of information can
be used without etching a new PCB :-)

Thx 4 help.
Marcus


Sorry everyone

I must do that more often, just for a laugh !!!! &-) ----- Original Message -----
From: "Eric" <erichards@eric...>
To: <avrclub@avrc...>
Sent: Sunday, October 12, 2003 12:32 PM
Subject: Re: [AVR club] Interfacing DISPLAYTECH 128x64 LCD this was done at
http://translation2.paralink.com/

Character-LCDs (e.g., 4x20) have nearly already become a Stanard in the
Casemodderszene.
Diagrammatic LCDs attain more and more in popularity, however, are not
spread up to now for a long time so far.
The advantages lie clearly on the hand: instead of preprogramed marks a
diagrammatic LCD can head for every pixel individually and show
therefore any marks and pictures.
In the Tutorial it is explained gradually how one assembles the hardware
and how one furnishes the software!
Required components
Pos article amount of price / piece
1 Displaytech 64128A Green / blue 1 49.90 / 69.90
2 level volume cables gray / color-coding 2 (= 2 meters) 0.87 / 1.35
To 3 patrol screen platinums 1 0.46
4 10k trick potentiometer 1 0.53
5 3.9 ohms opposition 1 W (with green lighting) or
10 ohms opposition 1 W (with blue lighting) 1 0.15
6 plugs D-SUB 1 0.14
7 5.25 " stream plugs 1 0.20
8 caps for plug D-SUB 1 0.17
9 instep tongs trick buttons 1 differently

Like you see you have with the display the choice between green and a ----- The Rest Of The Original Message Was Cut Off -----


Hi!

Eric schrieb:

> the wiper of the pot goes to Vee
>
> do you have the DISPLAYTECH part number?

It's DISPLAYTECH's "LCD 64128A".

Bye
Marcus


I put [64128A datasheet] into google and got a datasheet from
http://www.glyn.de/New_home/Produkte/Opto/Alphanum/graphic/daten/128x64/
64128A.htm

I could send it to you direct if you like From Eric

----- Original Message -----
From: "Marcus Klein" <klein@klei...>
To: <avrclub@avrc...>
Sent: Sunday, October 12, 2003 9:31 PM
Subject: Re: [AVR club] Interfacing DISPLAYTECH 128x64 LCD Hi!

Eric schrieb:

> the wiper of the pot goes to Vee
>
> do you have the DISPLAYTECH part number?

It's DISPLAYTECH's "LCD 64128A".

Bye
Marcus

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avrclub-unsubscribe@avrc...
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Thx for your help.

Bye
Marcus