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FT6206 Cap touch on 2.8" TFT LCD, ID:2090
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by waltr on Sat Jan 04, 2020 4:41 pm

The TFT display through SPI works great.
However, I can not get the FT6206 to respond through I2C. I am interfaced to a PIC processor but have written much PIC code for I2C.
After going through my code many times I wrote an I2C Addr scan function and displayed ACK'ed I2C address to TFT display.
No 0x38 ACK from FT6206.
Then added an EEPROM to the I2C bus and it ACK's.
Then LSM303 Compass/accel breakout and it ACK's.
So it seems my I2C code works correctly.

Careful examination with a strong magnifier shows what looks like bad connect on the printed circuit between CT-28040 and the printed circuit to the Breakout.

I did read through the forum her and found a few issues with bad Cap touch.

Anything else to try?
waltr
 
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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by waltr on Sat Jan 04, 2020 4:48 pm

Forgot to add:
The IRQ line never goes low.

Oh yes the positive:
I really like the Breakout. It makes interfacing very easy.
Also, the library code was very handy to get this and other displays up and running.
Thanks.
waltr
 
Posts: 296
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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by adafruit_support_mike on Sun Jan 05, 2020 5:09 am

Post a photo showing the trace you think is damaged please. 800x600 images usually work best.

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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by waltr on Sun Jan 05, 2020 10:44 am

First to was looks like bad connections. Hard to see the bent contacts inside the kapton tape.

Second is the display and a EEPROM and the LSM303 connected to the I2C bus after running an I2C address scan.
Only the EEPROM and LSM303's I2C address were found.

This is the real issue regardless of what the questionable connection looks like.

Thanks.
Attachments
IMG_1440 (Medium).JPG
IMG_1440 (Medium).JPG (107.96 KiB) Viewed 140 times
IMG_1420 (Medium).JPG
IMG_1420 (Medium).JPG (63.35 KiB) Viewed 140 times
waltr
 
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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by adafruit_support_mike on Sun Jan 05, 2020 9:52 pm

It does look like there's some damage to the flex cable. When did you get the display?

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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by Kathy693 on Mon Jan 06, 2020 6:42 am

From the picture, it seems the capacitive touch panel was welded on the flex cable of TFT LCD, otherwise, it can not be 50pins as only an I2C interface. you could check the initialized code for FT6206 ic and chips selected pins about 2.8" tft lcdand its capacitive touch address.

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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by waltr on Mon Jan 06, 2020 8:00 am

Mike,
Received the display a few weeks ago, my last order from Adafruit.

Kathy,
Posted picture shows checking the I2C address. The FT6206 did not respond.
waltr
 
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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by waltr on Mon Jan 06, 2020 8:23 am

Mike,
TFT display ordered on 12 dec 2019, invoice #2210143.
waltr
 
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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by waltr on Mon Jan 06, 2020 11:54 pm

Anything new on this issue Mike??

I'll be happy to send this display back to you to see and test..
waltr
 
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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by adafruit_support_mike on Tue Jan 07, 2020 3:01 am

I just needed to check the date of purchase, thanks.

Send a note containing a link to this page and your order number to support@adafruit.com. The folks there will get you a replacement TFT breakout.

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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by waltr on Tue Jan 07, 2020 8:39 am

Thanks Mike.
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Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by waltr on Sat Jan 11, 2020 12:10 pm

Received the replacement display and it works.
See photo.
I2C scan show 0x38 the FT6206.
Touching screen reads a touch and the X,Y location.

Thank you Mike and Adafruit support.
Attachments
IMG_1442 (Medium).JPG
IMG_1442 (Medium).JPG (106.87 KiB) Viewed 67 times
waltr
 
Posts: 296
Joined: Wed Jun 12, 2013 5:01 pm

Re: FT6206 Cap touch on 2.8" TFT LCD, ID:2090

by adafruit_support_mike on Sun Jan 12, 2020 2:48 am

Glad to hear the new one works for you. Happy hacking!

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Please be positive and constructive with your questions and comments.