Attaching AT070TN83 Display

[MrPec]

Hello,

I just designed a small pcb to connect that display. It seems to work, the backlight is working and I can see the android logo.

But the screen is offset, and it is mirrored.

Does anyone know how I can fix that? What kind of display are you going to use with your 7" screen?

Regards,

Alex

[LubOlimex]

Hello there,

we will be using AT070TN90.

Please double check the schematic or the datasheet for the signals around the LCD connector.

Regards,
Lub/OLIMEX

[MrPec]

Hi,

I double checked everything. For now, I just pin L/R to 3.3V. I think that I also could toggle the right I/Os to achieve that result, but it works for now...

My problem is... The image is still shifted 2cm to the left.

Is there anything I can do about that? I thought that, because the connection is digital, there could never be something like a shifted image?

Regards,

Alex

[MrPec]

Ok, I just compiled he sources by myself, and finally managed to pack the whole .img file and... it works!

The pwm backlight freqency seems to be too low, I can hear the backlight and there's a flickering.

[MrPec]

Ok, it seems that the noise from the backlight is only there if the brightness is reduced. And here is a picture of my setup (yes, I know, I made a mistake on the pcb )

[sittisaks]

MrPec, Can you share a wiring diagram and changes in the code?
Thanking in advance.

[lordlothar]

Hello, anyone who has done something similar and can share wiring diagram?

[olimex]

I do wonder as both A13-OLinuXino and A13-LCD7TS have schematic diagrams which show how the LCD is connected to the A13, what else you need to know?

[lordlothar]

But the thread is about AT070TN83, not AT070TN90 and as far as I know from the datasheets, pin assignment is not the same for both lcds. Connector also seems different from the one on A13-LCD7TS...

[JohnS]

Really up to the person with the different device to figure it out as clearly no-one else uses it.

That or use the same as others use.

John