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2.2" Color LCD Booster Pack with Touch


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#1 RobG

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Posted 10 September 2012 - 09:58 PM

I am working on a new color LCD booster pack featuring 2.2" display.
The board will work with two types of displays, one with touch screen and one without.
TSC2046/ADS7846 controller or MCU's analog inputs can be used to process touch events.

I expect some issues with the touch display since the spec sheet that was given to me is incorrect. As you can see on the image, only center LED is lit, indicating wrong connections or bad unit. Will have to sort it out.

As for the software, support for those two will be added to my color LCD library. I might need a volunteer to write touch functions (short on free time.)

Attached File  photo 1-1.jpeg   70.92KB   949 downloads

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#2 CorB

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Posted 11 September 2012 - 04:57 AM

Hi Rob,

Neat development, which displays are you using for this board ?

cheers
CorB

#3 RobG

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Posted 11 September 2012 - 11:46 AM

2.2" SPI Interface TFT LCD Module 176 x 20 Dots 262K Colors HX8340B
2.2" SPI Interface TFT LCD + Touch Panel 176 x 220 Dots 262K Colors
The second display (the one with touch panel) doesn't have correct datasheet. I have asked the seller to provide the proper one, they drew 4 more pins on the diagram which is still incorrect.

#4 larsie

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Posted 11 September 2012 - 12:06 PM

Nice displays. Will make great boosterpacks... How much current does it draw? I guess it needs a backlight to work or can you see the image without backlight also?

#5 GeekDoc

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Posted 12 September 2012 - 02:18 AM

I have asked the seller to provide the proper one, they drew 4 more pins on the diagram which is still incorrect.

That's hilarious! :lol:

Then again, that's ebay! :roll:

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#6 RobG

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Posted 13 September 2012 - 04:41 AM

OK, I have figured out the problem, can you spot it?

Attached File  photo.jpeg   74.34KB   808 downloads

Apparently, they used drawing from the other 2.2" display. After my inquiry, they added 4 more pins.
The problem is, 18 pin display has reversed pins. I hope the display is still OK.

Attached File  2.2T.png   50.52KB   795 downloads

#7 bluehash

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Posted 13 September 2012 - 05:12 AM

whoops.

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#8 zeke

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Posted 13 September 2012 - 05:36 AM

sdɹɐʍʞɔɐq

;)

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#9 bluehash

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Posted 13 September 2012 - 06:09 AM

How did you do that?

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#10 gordon

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Posted 13 September 2012 - 12:30 PM

/ɯoɔ˙uʍopǝpısdnʇxǝʇ//:dʇʇɥ
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#11 RobG

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Posted 13 September 2012 - 10:36 PM

Back to the topic, the first LCD is working with just a slight modification to the library.

Attached File  photo 1-1.jpeg   115.33KB   600 downloads
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#12 timotet

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Posted 15 September 2012 - 07:54 PM

Short on free time? With all the stuff you roll out do you ever sleep?

Great work as usual!

#13 username

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Posted 18 September 2012 - 01:51 AM

Incredible work as always mate! Lookin forward to this guy being available in the store!

Have you messed with the touch yet? Some of the old displays i've worked on require alot of pressure in order to a touch to register. Any idea of the sensitivity and accuracy of these guys?
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#14 RobG

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Posted 21 September 2012 - 06:45 PM

Got the second display working now, the one with touch panel! I can finish my BP PCB now.
As it turns out, on top of other issues already mentioned, the display is configured to use D/C signal and 8 bit SPI (datasheet says to pull DC pin up or down, suggesting 9 bit SPI.)

BTW, the picture doesn't show how nice this display is

Attached File  DSC_0729.jpg   78.44KB   399 downloads
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#15 username

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Posted 25 September 2012 - 01:33 AM

Got the second display working now, the one with touch panel! I can finish my BP PCB now.
As it turns out, on top of other issues already mentioned, the display is configured to use D/C signal and 8 bit SPI (datasheet says to pull DC pin up or down, suggesting 9 bit SPI.)

BTW, the picture doesn't show how nice this display is

[attachment=0]DSC_0729.jpg[/attachment]


Pic looks good! Can't wait for the boosterpack. Any luck with the touch sensitivity yet? Any chance you know what technology it uses?
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#16 RobG

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Posted 25 September 2012 - 02:17 AM

It's resistive type, QR4. I will play with the touch panel once I get my new boards.

#17 RobG

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Posted 12 October 2012 - 05:12 PM

Finally, the boards are here. Will have to test the touch functionality now.

Attached File  22touch.jpeg   261.79KB   273 downloads
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#18 cubeberg

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Posted 12 October 2012 - 05:15 PM

Looks awesome RobG!

#19 leahy268

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Posted 16 October 2012 - 02:33 AM

Been looking forward to seeing these available to buy...
Over here in oz..
Would love to be able to get 1 or 2 of them.

#20 RobG

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Posted 16 October 2012 - 03:48 AM

I am still waiting for LCDs, should be here any day now.




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