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Author Topic: [Starting] My little cintiq build log  (Read 4455 times)
nazmo76
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« on: May 20, 2015, 10:33:33 PM »

Hi,
I will présent you my diy little (13") cintiq project , based on a screen + digitizer I got from an old penabled tablet, see my introduction topic if you want to see the whole story :

So what I got:

Screen + Digitizer+Driver+Styluses




LVDS/VGA adapter on the way to France


basic aruduino/C knowledge + some boards





What I have done :
Googled a lot
Made some schemas

What I have to do :
Interface with buttons, leds and a lot of useful/less stuff
Make a case
Get the wacom driver working on both linux and windows
Interface the digitizer with USB or UART
Interface the lcd with vga

So I have some questions :
If the digitizer board works on 3.3v usb, do I need to adapt the Data pins or only the power pins
If it works on UART only, would a ftdi usb/serial converter work ?
Would I get jitter as it was made to work with the screen ?

Cordially
NAZMI
« Last Edit: July 25, 2016, 06:16:12 PM by nazmo76 » Logged
XDjackieXD
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« Reply #1 on: May 22, 2015, 07:03:04 AM »

If it's an uart digitizer, you can use a ftdi cable (set to 3.3V) but it will only work in Linux (Idk how to install a serial penabled tablet ob Windows...).
If it's a usb one, you just have to regulate the 5V down to 3.3V (the data pins already use 3.3V so nothing is required there.).
With my penabled cintiq (see my buildlog) I got no jitter at all (it even is a ccfl backlight Tongue)

-Jakob
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nazmo76
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« Reply #2 on: May 22, 2015, 04:49:24 PM »

Hi,
I'm checking it. I hope it'll be an usb one but if it's an uart one it will make me switch to linux sooner Smiley
Cordially
Nazmi
« Last Edit: July 25, 2016, 06:16:25 PM by nazmo76 » Logged
nazmo76
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« Reply #3 on: May 22, 2015, 08:21:49 PM »

Hi there, After about 3hours of soldering, desoldering, tries, fails, ... .
I don't made my digitizer to work, it's not detected on windows, for me some of these are possible :

- Windows sucks  Grin
- 3.28v is not enough Undecided
- The usb pins are wired but they are useless
- I should have re/set the board by grounding for a moment pin 12
- I should have powered pin 11 with 3.3v
- It's dead
- Something else

I made this pinout :

1  0v / usb+psu GND
2  0v / usb+psu GND
3  D-
4  D+
5  NC (will be connected to a green led in final build) (touch)
6  NC (will be connected to an orange led in final build) (presence)
7  NC
8  NC
9  NC (will be connected in final build if I fail on usb)
10 NC(will be connected in final build if I fail on usb)
11 NC (maybe has to be powered on 3.3v)
12 NC (maybe has to be connected to GND momentarily)
13 +3.3v
14 0v/usb+psu GND


I used these three pinouts :

This one from http://blog.muwave.de/2014/02/wacom-digitizer-screen/
 1   GND (logic, can be shorted to common by solder bridge)
 2   ?
 3   ?
 4   ?
 5   TOUCH (active high)
 6   PRESENT (active high)
 7   Flow control (?)
 8   Flow control (?)
 9   Serial TTL TX
 10  Serial TTL RX
 11  ?
 12  RESET (?)
 13  VCC (3V3)
 14  GND (common)

The other from the wiki : http://wiki.bongofish.co.uk/doku.php?id=bongofish:penenabled

Pin#   Name    Signal Direction    Wire Color (USB)    

1    USB Ground1       Black    Shield or signal ?
2    USB Ground2       Brown (also seen Black)    Shield or signal?
3    USB D-       (twisted pair)    
4    USB D+       (twisted pair)    
5    USB power (5V)?       Red    
6    ?       Orange or Blue    
7    DTR    Tablet ← Host    unconnected    
8    RTS    Tablet ← Host    unconnected    
9    RXD    Tablet → Host    unconnected    
10    TXD    Tablet ← Host    unconnected    
11    GRD    **Tablet ←?→ Host    yellow/green
12    PLTRS1    Tablet ← Host    green
13    PCB VCC 3.3v       Red    VCC Supply
14    PCB Ground       Black    

A thread on the forum : http://forum.bongofish.co.uk/index.php?topic=1870.msg13784#msg13784
Pins 1-2          Must be set to ground.
Pin 3                   USB D-
Pin 4                   USB D+
Pin 5                   Unknown
Pin 6                   The board sets this pin to +3.3V if the digitizer is detecting the pencil.
Pin 7-8-9-10   Those are the supposed pins for serial output.Not originally connected in my board.[...]
Pin 11           Must be set to 3.3V.[...]
Pin 12           Set by the board at 3.3V.If this pin is grounded, the USB device disconnects (you hear the USB device disconnected sound[...]
Pin 13           Must be set to 3.3V.If this pin is unconnected,the USB device is not found
Pin 14           Must be set to ground
« Last Edit: May 22, 2015, 08:39:17 PM by nazmo76 » Logged
Aerendraca
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« Reply #4 on: May 22, 2015, 10:31:57 PM »

Perhaps we could see a closeup of the wacom circuit? Perhaps a closup of the connector too?

Which panel is it that you have?

There's a whole bunch of "NC"s in your pinout, are you sure this is correct? Are these pins really not connected?

- Windows sucks - sometimes it does yes.
- 3.28V should be fine, it's close enough to 3.3V.
- ? not sure if setting/resetting the board is necessary, why do you think this?
- power to pin 11 - possibly we need to see a closeup of the board
- it might be dead, although I would be suprised if the digitizer has died. Have you ever seen it working?
- probably something else.....we need to investigate more.

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nazmo76
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« Reply #5 on: May 22, 2015, 10:37:07 PM »

Lets add some pics  Tongue
The horrible flat connector :

The usb cable i used :

First try for the psu pins :

Epic fail with the D+/D- pins, so painful to resolder :



-
- OK
- It's just a supposition, maybe the board would be waiting for it as a "wake up" signal
- Trashie said it was nescessary to make the emr start on his/her board
- It's scraped from an architect company and it was from a very old stylistic like 2004-2005 so I never saw it work, it also stayed in my "stuff to hack" box for 2-3 years
« Last Edit: May 22, 2015, 10:50:36 PM by nazmo76 » Logged
nazmo76
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« Reply #6 on: May 22, 2015, 11:02:56 PM »

The board in her majesty  Shocked :
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nazmo76
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« Reply #7 on: May 22, 2015, 11:31:17 PM »

The connector :

My connector :


PS: The pen partner was not connected tonight and gimp refused to work
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Aerendraca
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« Reply #8 on: May 23, 2015, 09:43:42 AM »

I hate to say it but I think you might be better off going down the uart route. It could be that the board needs an enable signal of some sort, maybe a pin pulled high/low but it's hard to say for sure. In a last ditched attempt I might be tempted to try pulling pins 11&12 low one at a time and if that fails then try pulling them to 3.3v.

I take it you have seen no sign of life from it yet? No indicator light or Windows error noises?

One day I will get my hands on one of these types of screens and figure out what exactly is required by them for them to work.
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nazmo76
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« Reply #9 on: May 24, 2015, 01:45:43 PM »

Hey,

Quote
You might be better off going down the uart route
I think you re right, it's from an old tabled so I think they only implemented the uart even if the connector looks like supporting usb, thats what this guy who have a similar (SU-010-X01, mine is SU-020-X01) tabled did http://blog.muwave.de/2014/02/wacom-digitizer-screen/ 101

Quote
It could be that the board needs an enable signal of some sort, maybe a pin pulled high/low but it's hard to say for sure
I might be tempted to try pulling pins 11&12 low one at a time and if that fails then try pulling them to 3.3v.
I would do it but it's so painful to solder these, i'll try to do it when I finish my cousin pc mod Wink

Quote
I take it you have seen no sign of life from it yet? No indicator light or Windows error noises?
Not any, because i did not connected any indicator, however I got an update in the device manager the first time i connected it with d+, d- and GND to the common grounding, but nothing more.
« Last Edit: May 24, 2015, 03:39:36 PM by nazmo76 » Logged
nazmo76
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« Reply #10 on: June 05, 2015, 01:22:04 AM »

Hi guys,
Some new stuff, i received today my lvds controller board, Shocked im trying to make everything work, not an easy task since this board was made with a 30 pin lvds cable (with 8 power supply and 2 nc pins) but my screen uses a separate inverter to power the ccfl.
Some photos tomorow

Cordially
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nazmo76
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« Reply #11 on: June 11, 2015, 09:18:03 PM »

Hi there,
Sorry for the lateness but I was busy doing an exam (literature), some news
*Again reported, a storm is coming, I ll shut my computer off case of... Cry

Cordially
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nazmo76
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« Reply #12 on: June 16, 2015, 10:10:50 PM »

May 20th is my lucky day, yesterday I switched again to linux, (debian KDE), it's so amazing, profesionnal, optimised, ...
and I looked at  that flat cable that prevent me from testing my wacom penabled board because of the paper-thin "copper" track Embarrassed,

it was lying on my desk, I grabbed it and I started getting a metal plate off with my nails and the crappy flat cable fell on the ground Roll Eyes leaving a regular flat connector i can fill with whatever cable I would want Shocked Roll Eyes Cool

Soooooooo, good news incoming I just have to :

-Get the vga-lvds convertor to work
-Make my custom cable to connect the digitizer to my serial to usb converter
-Making an useless board filled with buttons and leds and interfaced with my pc :p
-Making a nice, luxury wood enclosure
-Getting it to work in linux

Ps : Talking about linux, does anyone knows how to make an old serial wacom penpartner CT-0405-R working in it ?
Ps2 : Some photos coming, I promise Smiley
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XDjackieXD
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« Reply #13 on: June 17, 2015, 09:45:06 PM »

To attach a serial tablet I used "sudo inputattach --daemon --baud 9600 -w8001 /dev/ttyUSB0".
Idk if it works with the penpartner but I guess so...
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rodder
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« Reply #14 on: December 19, 2016, 07:52:21 AM »

What happened with your project dude?
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