Go to advanced search

by aBUGSworstnightmare
Thu Feb 27, 2020 2:17 pm
Forum: Troubleshooting
Topic: 7" Touch Screen - Black Screen
Replies: 4
Views: 63

Re: 7" Touch Screen - Black Screen

cable for DSI/CSI is the same.

be sure to connect the FFC the right way: https://www.raspberrypi.org/learning/ad ... e/display/

You also need to supply 5V to your display (use seperate USB power supply to start with).
by aBUGSworstnightmare
Thu Feb 27, 2020 12:41 pm
Forum: Troubleshooting
Topic: 2k lcd only half section showing 1440x2560
Replies: 2
Views: 35

Re: 2k lcd only half section showing 1440x2560

make sure 'hdmi_enable_4k=1' is there in config.txt then get rid of all the framebuffer related settings as they are valid for console only and FMKS doesn't care. Where did you get those timings from?? It's a 5.5in 2k lcd 1440x2560, work perfect in windows. Plus on port hdmi 0 of R.Pi4-2gb. What's t...
by aBUGSworstnightmare
Thu Feb 27, 2020 9:31 am
Forum: General discussion
Topic: Original 7inch displej resolution
Replies: 17
Views: 347

Re: Original 7inch displej resolution

sky59 wrote:
Wed Feb 26, 2020 8:20 pm
So what is the answer?

What is physical pixels resolution?

How fit my measurements to it?
The phsyical reslution is 800x480 pixels. Question on pixel geometry pitch/size need to be answered by some moderator
by aBUGSworstnightmare
Thu Feb 27, 2020 9:25 am
Forum: General discussion
Topic: Disable screen saver
Replies: 5
Views: 113

Re: Disable screen saver

Why not simply disable screen blanking via Raspberry Pi configuration - Display tab?
Added with latest Buster release... no need to install screen saver or make additonal settings...
by aBUGSworstnightmare
Wed Feb 26, 2020 6:25 pm
Forum: General discussion
Topic: Original 7inch displej resolution
Replies: 17
Views: 347

Re: Original 7inch displej resolution

Your 'measuremt' and 'assumption' on resolution is only valid in case of square pixels.

So reconsider, knowing that the pixel shape of the official display is rectangular ...
by aBUGSworstnightmare
Wed Feb 26, 2020 6:40 am
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 113
Views: 78650

Re: LVDS add-on for Raspberry models with 40pin GPIO

Your display has a dual channel LVDS interface. It is (most likely) 2/3 of a Full-HD display (either cutted or designed by purpose). Both LVDS clocks needs to be the same, as one clock is for odd pixels (1,3,5,7..) and the other for even (2,4,6,8..), hence they need to be in perfect sync. One advant...
by aBUGSworstnightmare
Wed Feb 26, 2020 6:09 am
Forum: Troubleshooting
Topic: No green light after taking sd card out
Replies: 7
Views: 170

Re: No green light after taking sd card out

Sounds pretty much like a corrupted card. Tra using the SDcard formatter https://www.sdcard.org/downloads/formatter/

Thenuse Etcher to flash the OS image to your card. Insert it into your Pi and start from scratch.
by aBUGSworstnightmare
Tue Feb 25, 2020 3:43 pm
Forum: General discussion
Topic: Rpi 3 V3D 720p?
Replies: 7
Views: 200

Re: Rpi 3 V3D 720p?

(at least) with FMKS enabled you should be able to switch between availabe resolutions. Your TV 'advertises' it's capabilities (supported resolutions) via EDID to your RPi. So you can select which one to be used.
by aBUGSworstnightmare
Tue Feb 25, 2020 3:28 pm
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 113
Views: 78650

Re: LVDS add-on for Raspberry models with 40pin GPIO

It's not about soldering the IC, that can also be done with a heat gun, even with the hot plate at your kitchen. The point is the increase of cost of the PCB due to the small via size, small trace size, and very likely layer count. As it is a BGA package you will (most likely) end up with 6-layers ...
by aBUGSworstnightmare
Tue Feb 25, 2020 10:20 am
Forum: General discussion
Topic: Dual input lcd 50 pin connector 1 output lcd 50 pin connector
Replies: 2
Views: 87

Re: Dual input lcd 50 pin connector 1 output lcd 50 pin connector

use a HDMI switch
you can try to build your own 'digital signals switch' for RGB signals .. but only if you're able to find suitable components ..
by aBUGSworstnightmare
Tue Feb 25, 2020 5:16 am
Forum: Official Foundation Display
Topic: Official display glass thickness
Replies: 1
Views: 84

Re: Official display glass thickness

Can you post pictures of the packaging of that screen with thicker cover glass?
by aBUGSworstnightmare
Sat Feb 22, 2020 6:38 am
Forum: Official Foundation Display
Topic: AnyDesk not perfect showing
Replies: 2
Views: 129

Re: AnyDesk not perfect showing

For the official 7in DSI touch display you don't need to make any framebuffer settings.
Which RPi are you using?
by aBUGSworstnightmare
Fri Feb 21, 2020 5:44 am
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 113
Views: 78650

Re: LVDS add-on for Raspberry (SINGLE CLOCK, DUAL CLOCK?))

Hello again, I just forgot to ask something else... There are some screens using two clock differential pairs, some other only use one. As far as I understood, the ones with two differential pairs are older, and the newer ones are using only one. To keep backwards compatibility, the DS90C387 has bo...
by aBUGSworstnightmare
Fri Feb 21, 2020 5:40 am
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 113
Views: 78650

Re: LVDS add-on for Raspberry models with 40pin GPIO

Hello guys, I've found a quite interesting IC for dual LVDS interface. It seems to have the same functionality as the DS90, at lower cost and smaller footprint. The problem: The footprint is so small that isn't suitable for regular cheapo PCB manufacturers... https://datasheet.lcsc.com/szlcsc/19121...
by aBUGSworstnightmare
Thu Feb 20, 2020 5:14 am
Forum: Troubleshooting
Topic: New Pi User - Help with 4” Touchscreen & additional HDMI Monitor
Replies: 2
Views: 56

Re: New Pi User - Help with 4” Touchscreen & additional HDMI Monitor

Cristal ball is out for vacation so, as long as you don't provide more details on your monitors it will be hard to answer.

First question: in case only HDMI monitor is connected is it working?
by aBUGSworstnightmare
Wed Feb 19, 2020 5:49 am
Forum: Compute Module
Topic: How to connect 7 inch tft touchscreen as 24 bit ttl dpi on CM3 IO Board ?
Replies: 3
Views: 124

Re: How to connect 7 inch tft touchscreen as 24 bit ttl dpi on CM3 IO Board ?

Hi mucalas, welcome to the funny world of connecting displays to the Raspberry Pi! as you can see from the output of 'raspy-gpio get' all or your GPIO are in default state, hence how can you expect your display to work as you've neither configured them for ALT2 function (refer to CM3 users manual), ...
by aBUGSworstnightmare
Tue Feb 18, 2020 2:01 pm
Forum: Troubleshooting
Topic: display_hdmi_rotate cutting off / not showing console (RPi 4B)
Replies: 3
Views: 83

Re: display_hdmi_rotate cutting off / not showing console (RPi 4B)

Disable FKMS to make use of display_hdmi_rotate or display_lcd_rotate as legacy driver is supporting it.
Use screen congfiguration tool under FKMS for rotating/aligning screens
by aBUGSworstnightmare
Tue Feb 18, 2020 1:51 pm
Forum: Advanced users
Topic: Rotate HDMI on boot to command line (RPi4)
Replies: 8
Views: 201

Re: Rotate HDMI on boot to command line (RPi4)

Disable the FMKS driver and make use of the legacy driver in config.txt

Code: Select all

#dtoverlay=vc4-fkms-v3d
adding 'display_hdmi_rotate=2' (details are here https://www.raspberrypi.org/documentati ... t/video.md) should rotate your screen
by aBUGSworstnightmare
Tue Feb 18, 2020 5:15 am
Forum: Official Foundation Display
Topic: Longevity of official screen
Replies: 3
Views: 214

Re: Longevity of official screen

It's TN technology, make sure to take action to prevent image sticking
by aBUGSworstnightmare
Mon Feb 17, 2020 5:33 am
Forum: Troubleshooting
Topic: STICKY: Setting up HDMI output when video output is wrong.
Replies: 580
Views: 1012659

Re: Setting up HDMI output

Actually I'd say at the present this is absolutely vital to absolute beginners. :-) There's been a lot of issues with newbies getting the device to work just the way they want to on their screens. The directions are concise and easy to follow so even an absolute beginner should be able to type in t...
by aBUGSworstnightmare
Fri Feb 14, 2020 5:35 am
Forum: General discussion
Topic: Power Board Module + Extension Board
Replies: 2
Views: 118

Re: Power Board Module + Extension Board

Why din't you ask your seller or the manufacturer for support. At least you should provide some link to the products page ...
by aBUGSworstnightmare
Fri Feb 14, 2020 5:31 am
Forum: Troubleshooting
Topic: Rpi4 - 5" DSI display with HDMI0 - HDMI0 only display portion on screen (800x480)
Replies: 4
Views: 160

Re: Rpi4 - 5" DSI display with HDMI0 - HDMI0 only display portion on screen (800x480)

Sorry, send my crystal ball to maintanance because of the same issue: blurry image.

... As long as you don't provide details of the hardware you are using nobody will be abke to answer!
There is only the 7in official RPI display which works flawlessly on DSI, so what is yours?
by aBUGSworstnightmare
Tue Feb 11, 2020 6:03 am
Forum: Compute Module
Topic: CM3+ Custom Board Schematic
Replies: 3
Views: 207

Re: CM3+ Custom Board Schematic

All pins of a partucular voltage domain should be connected to it; or do you only connect one GND (ground) even if there are (lets say) 40?
by aBUGSworstnightmare
Mon Feb 10, 2020 10:05 am
Forum: Troubleshooting
Topic: Rapsberry pi4 screen wont update when rotated
Replies: 11
Views: 268

Re: Rapsberry pi4 screen wont update when rotated

Sorry for asking, but can you post a small video which shows the screen behavior when you change orientation, click the green arrow (apply button) and close the screen configuration utility? Which Raspbian version are you uisng (i,e, perform update/full-upgrade)?
by aBUGSworstnightmare
Mon Feb 10, 2020 8:17 am
Forum: Compute Module
Topic: Compute module sound In/Out
Replies: 1
Views: 181

Re: Compute module sound In/Out

Here is a list of overlays; has a lot of I2S related entries https://github.com/raspberrypi/firmware ... ays/README

Look at off-the shelf products (i.e. https://www.hifiberry.com/docs/data-she ... c-adc-pro/) to figure out if one of them uses a chip that fits your needs.

Go to advanced search