alsamaraee
Posts: 3
Joined: Sun Jun 09, 2019 8:28 am

DPI parallel Display problem

Fri Jun 14, 2019 11:37 pm

Hello,

I connected raspberry pi 3 to a rgb parallel display via dpi GPIO. the display is 7" 800x480 18 bit. The problem is I don't have any datasheet about the display. But I could connect it and get picture with issues. The colors are right. But the picture is unstable. You can check the short video.
https://www.youtube.com/watch?v=4gFNcr-WpMw
My config.txt file has these settings

Code: Select all

#dpi configurations
dtoverlay=dpi24
overscan_left=0
#overscan_right=0
overscan_top=0
overscan_bottom=0
framebuffer_width=800
framebuffer_height=480
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=49157
#output_format = 5
#rgb_order = 0
#output_enable_mode = 0
#invert_pixel_clock = 0
#hsync_disable = 0
#vsync_disable = 0
#output_enable_disable = 1
#hsync_polarity = 0
#vsync_polarity = 0
#output_enable_polarity = 0
#hsync_phase = 0
#vsync_phase = 0
#output_enable_phase = 0

dpi_timings=800 0 60 48 88 480 0 13 3 32 0 0 0 60 0 32000000 6
Any help?

aBUGSworstnightmare
Posts: 1362
Joined: Tue Jun 30, 2015 1:35 pm

Re: DPI parallel Display problem

Sat Jun 15, 2019 2:55 pm

alsamaraee wrote: The problem is I don't have any datasheet about the display.
how can somebody else help you with this?
The only thing I can say is: your timing is wrong.

What's wrong? You need to data sheet for answering this. Do you have the part number of the display at least?

alsamaraee
Posts: 3
Joined: Sun Jun 09, 2019 8:28 am

Re: DPI parallel Display problem

Thu Jun 27, 2019 8:09 am

The only thing I can say is: your timing is wrong.

What's wrong? You need to data sheet for answering this. Do you have the part number of the display at least?
Thank you for your replay.

The only text I can see is on the display cable

P9178-2 Main Foil R5.8
303001134 S1140
20100329

Searched google got nothing.
https://ibb.co/4VNCf9n
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