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Screen shifted (TVP401)
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Please be positive and constructive with your questions and comments.

Screen shifted (TVP401)

by thatguy1 on Fri Feb 15, 2019 6:29 pm

I am using the TVP401 in a project, I am not using an adafruit screen, but one I got online because I needed a specific size.

When I plug in a regular HDMI source, PC, PS4, etc it displays properly. When I use the raspberry pi, everything is shifted to the left. If I adjust the overscan right option in config.txt to 80, I can shift it so it shows the entire picture, but adjusting the other overscan options won't move the image to fill the screen. I used the config.txt code from https://learn.adafruit.com/adafruit-tfp401-hdmi-slash-dvi-decoder-to-40-pin-ttl-display/raspberry-pi-config here to get it this far.

what else can I do? I know it's a 800x480 screen, but I do not know the timings.

here is a pic
IMG_20190210_205822-Optimized.jpg
IMG_20190210_205822-Optimized.jpg (52.29 KiB) Viewed 47 times


here is the screen in question
https://www.aliexpress.com/item/6-2-inch-HD-car-LCD-screen-with-40P-cable-for-TIANMA-TM062RDZ02/1254466597.html?spm=a2g0s.9042311.0.0.24a94c4dnT3cOH

thatguy1
 
Posts: 2
Joined: Fri Feb 15, 2019 6:17 pm

Re: Screen shifted (TVP401)

by thatguy1 on Sun Feb 17, 2019 1:38 pm

I've got the screen centered, and no matter what I've done, I can't get it to fill the screen. the right side is always empty, or loaded with artifacts.

IMG_20190217_121733-Optimized.jpg
IMG_20190217_121733-Optimized.jpg (63.85 KiB) Viewed 34 times


here are my overscan settings to get this far.
overscan_left=150
#overscan_right=16
overscan_top=1
overscan_bottom=16

thatguy1
 
Posts: 2
Joined: Fri Feb 15, 2019 6:17 pm

Please be positive and constructive with your questions and comments.