RA8875 with 7'' touchscreen, touches not working.

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JMC17
 
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RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

viewtopic.php?f=25&t=192841
Alright! I got the parts.
The screen works beautifully but I can't get it to recognize touches.
I'm running buildtest.ino and getting this:
RA8875 start
Found RA8875
Status: 0
Waiting for touch events ...
And no touch events when I press the screen.
Don't laugh too hard at my solders..
Here's a few screenshots of my setup
Attachments
p3.jpg
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p2.jpg
p2.jpg (110.54 KiB) Viewed 194 times
p1.jpg
p1.jpg (67.85 KiB) Viewed 194 times

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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

Okay I resoldered everything and separated the bridge from the conductive metal backplate and now I'm getting touches but they're not accurate, is that normal?
Touching the four corners gives me some kind of diagonal line.
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p5.jpg
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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

I attached a picture of what the calibration screen looks like. (ts_calibration.ino)
When running the serial plotter, I noticed that it detects pressure, not position.
Again, not sure if any of this is normal, I would really appreciate some advice.
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adafruit_support_carter
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by adafruit_support_carter »

Just to check - you're using this display?
https://www.adafruit.com/product/2354

The sketch may need some adjustments, since it's written to be used by various different sized displays.

Did you change this line to be RA8875_800x480?
https://github.com/adafruit/Adafruit_RA ... n.ino#L279

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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

Yep! On both Sketches. (Actually the calibration.ino wasn't edited, I just changed it but same results as my picture, just in full screen)

With buildtest.ino, I get a full colored screen flashing between colors until the geometry (green red and yellow on blue background) appears as you see on the pictures I've posted.
I assumed that was normal.

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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

Here's a picture of the resoldered board, just in case you ask!

Also, is there a return window?
I'm not sure if I got something defective or not.
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by adafruit_support_carter »

The soldering is still potentially a little cold soldered. But you're getting expected output on the display and even registering touch events. So maybe it's OK. Let's go back to the software.

Can you rerun the ts_calibration.ino sketch and post here all the output that shows up in the Serial Monitor.

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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

Thanks for the reply!
I've added a soldering iron and other soldering tools to my adafruit cart.
I'm still using my father's old soldering iron with pretty thick silver solder with flux core.

Without me touching the screen

Code: Select all

Hello, RA8875!
Found RA8875
Enabled the touch screen
Calibration found

Waiting for touch events ...
Touch: 0, 1
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 1
Touch: 0, 1
Touch: 0, 1
Touch: 0, 1
Touch: 0, 0
Touch: 0, 0
Touch: 1, 0
Touch: 0, 1
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 1
Touch: 0, 0
With touching the screen once:

Code: Select all

Hello, RA8875!
Found RA8875
Enabled the touch screen
Calibration found

Waiting for touch events ...
Touch: 1, 1
Touch: 0, 1
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 1
Touch: 0, 1
Touch: 0, 0
Touch: 0, 1
Touch: 0, 0
Touch: 0, 1
Touch: 0, 0
Touch: 0, 1
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 1
Touch: 0, 3
Touch: 0, 0
Touch: 0, 0
Touch: 0, 1
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 27, 76
Touch: 22, 62
Touch: 77, 178
Touch: 86, 197
Touch: 101, 223
Touch: 113, 244
Touch: 117, 247
Touch: 122, 261
Touch: 127, 270
Touch: 131, 275
Touch: 135, 282
Touch: 136, 287
Touch: 138, 288
Touch: 139, 290
Touch: 140, 291
Touch: 142, 293
Touch: 142, 294
Touch: 142, 297
Touch: 143, 295
Touch: 143, 295
Touch: 144, 295
Touch: 143, 295
Touch: 144, 296
Touch: 141, 296
Touch: 143, 296
Touch: 144, 295
Touch: 145, 294
Touch: 137, 285
Touch: 121, 258
Touch: 89, 192
Touch: 38, 103
Touch: 0, 1
Touch: 0, 0
Touch: 0, 1
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 1
Touch: 0, 0
Touch: 0, 1

And this is what it looks like on the serial plotter when I press gently and then apply more pressure.
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by adafruit_support_carter »

Thanks. That helps.

Try changing these lines at the top of the sketch:

Code: Select all

// Use to force a recalibration
#define FORCE_CALIBRATION false
to

Code: Select all

// Use to force a recalibration
#define FORCE_CALIBRATION true
It looks like the sketch does a fancy thing for boards, like yours, with EEPROM. It stores the calibration results there to reuse later. But the sketch is setup assuming those values are already there. That's why it's saying "Calibration found". Setting the flag above should (hopefully) force it to perform a new calibration.

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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

Here's what I'm getting now:

Code: Select all

Hello, RA8875!
Found RA8875
Enabled the touch screen
Calibration not found.  Calibrating..

Starting the calibration process
Touch: 0, 0
Touch: 0, 1
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 1
Point 1 - LCD X: 80 Y: 48 TS X: 0 Y: 1
Touch: 0, 1
Point 2 - LCD X: 400 Y: 432 TS X: 0 Y: 1
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 1
Point 3 - LCD X: 720 Y: 240 TS X: 0 Y: 1
Waiting for touch events ...
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Touch: 0, 0
Still getting pressure touch and not position =(
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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

I really need a resolution to this problem.

I have another non-adafruit touchscreen and that one works fine.
Obviously there's a problem somewhere because I'm not getting a position when I touch the screen, just pressure.
Since I don't know what the return window is, it is making me nervous.

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adafruit_support_carter
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by adafruit_support_carter »

I think this is (hopefully) something very simple. Like just a procedural things with how to use the calibration sketches, etc. I've pinged someone else that has more direct experience with these hardware items. They should respond here soon.

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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

Although I have spent many hours trying to get it to work, in vain, I'm also hoping this is something simple.
I'm waiting on a resolution for this problem before I buy more stuff.

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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

Alright it's been weeks now and we haven't reached any conclusion.
I'm requesting a refund or return.

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JMC17
 
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Re: RA8875 with 7'' touchscreen, touches not working.

Post by JMC17 »

My project due date has now passed. Thanks for ignoring me.
I really wanted to like you guys. I told my brother that you guys were the best, then week after week, he kept asking me about my project and everytime I had to tell him I'm waiting on support.
Now I have to tell him that you guys sells defective products and ignore your clients when they request help.
I'm so disappointed.

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