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by W. H. Heydt
Thu Dec 05, 2019 6:35 pm
Forum: Beginners
Topic: Turning The Razer Blade (2016) 14" QHD into a Pi PC
Replies: 5
Views: 117

Re: Turning The Razer Blade (2016) 14" QHD into a Pi PC

... break apart your Laptop you will find all the ports, keyboard, trackpad and charging circuit built into the main board. Therefore you will need a LVDS Board to power the screen which requires 12V DC. Having not taken apart any newer laptops, is it common to have the LCD driver integrated into ...
by fruitoftheloom
Thu Dec 05, 2019 6:02 pm
Forum: Beginners
Topic: Turning The Razer Blade (2016) 14" QHD into a Pi PC
Replies: 5
Views: 117

Re: Turning The Razer Blade (2016) 14" QHD into a Pi PC

... break apart your Laptop you will find all the ports, keyboard, trackpad and charging circuit built into the main board. Therefore you will need a LVDS Board to power the screen which requires 12V DC. Having not taken apart any newer laptops, is it common to have the LCD driver integrated into ...
by bjtheone
Thu Dec 05, 2019 4:10 pm
Forum: Beginners
Topic: Turning The Razer Blade (2016) 14" QHD into a Pi PC
Replies: 5
Views: 117

Re: Turning The Razer Blade (2016) 14" QHD into a Pi PC

... break apart your Laptop you will find all the ports, keyboard, trackpad and charging circuit built into the main board. Therefore you will need a LVDS Board to power the screen which requires 12V DC. Having not taken apart any newer laptops, is it common to have the LCD driver integrated into ...
by fruitoftheloom
Thu Dec 05, 2019 8:17 am
Forum: Beginners
Topic: Turning The Razer Blade (2016) 14" QHD into a Pi PC
Replies: 5
Views: 117

Re: Turning The Razer Blade (2016) 14" QHD into a Pi PC

... break apart your Laptop you will find all the ports, keyboard, trackpad and charging circuit built into the main board. Therefore you will need a LVDS Board to power the screen which requires 12V DC. You will need to a way to interact with the keyboard and trackpad as well re-purposing the various ...
by aBUGSworstnightmare
Sun Dec 01, 2019 4:32 pm
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 100
Views: 69583

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

bird2000 wrote:
Sun Dec 01, 2019 12:19 pm
Thx, than the explanations and the way offered by Peter are correct and MichaRs comments targets to a other context. But the main questions about the new PCB you haven't answered - ETA and location?
ETA= When it's done
Location: Germany
by bird2000
Sun Dec 01, 2019 12:19 pm
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 100
Views: 69583

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

Thx, than the explanations and the way offered by Peter are correct and MichaRs comments targets to a other context. But the main questions about the new PCB you haven't answered - ETA and location?
by aBUGSworstnightmare
Fri Nov 29, 2019 5:38 am
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 100
Views: 69583

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

Hi, cheaper sounds well, but only two layers ? MichaR is the meaning that this will result in a poor signal! Do you have a ETA of release ? Where are you located because of shipping cost ? MichaR's comment is in another context. What is proven working here https://www.raspberrypi.org/forums/viewtop...
by bird2000
Fri Nov 29, 2019 2:05 am
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 100
Views: 69583

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

Hi, cheaper sounds well, but only two layers ? MichaR is the meaning that this will result in a poor signal! Do you have a ETA of release ? Where are you located because of shipping cost ?
by aBUGSworstnightmare
Thu Nov 28, 2019 4:10 pm
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 100
Views: 69583

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

Hello @aBUGSworstnightmare, if available I would to buy one or two of the LVDS4PI boards. best regards Birgitt Hi Birgitt, sorry, but all boards are gone already (for quite some time). Anyhow, I've also needed some more and decided to design a successor which will solve some issues: - one board whi...
by bird2000
Wed Nov 27, 2019 9:29 pm
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 100
Views: 69583

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

Hello @aBUGSworstnightmare, if available I would to buy one or two of the LVDS4PI boards.
best regards
Birgitt
by fruitoftheloom
Fri Nov 01, 2019 1:45 pm
Forum: Beginners
Topic: Re-purposing old laptop LCD via Raspberry Pi
Replies: 4
Views: 312

Re: Re-purposing old laptop LCD via Raspberry Pi

... pi with the same power source? If it is, can I do it with a battery or something portable like a power bank? Thank you. Please be aware that most LVDS Boards require 12v 4A power supply....
by LTolledo
Fri Nov 01, 2019 9:16 am
Forum: Beginners
Topic: Re-purposing old laptop LCD via Raspberry Pi
Replies: 4
Views: 312

Re: Re-purposing old laptop LCD via Raspberry Pi

My RPi3B's screen is from an old MSI EX460 which died 5 years ago.... just recently I bought the LVDS driver board that matched the LCD screen (took me a while to do the research) the LVDS has on-board audio amplifier so I also hooked it up to a speaker. in the picture ...
by Gavinmc42
Wed Oct 30, 2019 11:19 am
Forum: Beginners
Topic: Security Camera BNC to HDMI
Replies: 9
Views: 512

Re: Security Camera BNC to HDMI

Wasn't there a Toshiba chip being used for this?
Seem to remember it was using the CSI/Camera LVDS input.
Was it ever made into a hat thing?
by nox404
Wed Oct 30, 2019 9:47 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI to LVDS
Replies: 8
Views: 1006

Re: DSI to LVDS

Ok we managed to get it working using the link you provided (@6by9).

But now we have lots of logs in the kernel about

Code: Select all

LP0 contention error
about 30-60 times/sec which is a lot for the CM3.
Can you provide us some hints on how to get this fixed ?

Thank you for your time !
by Gavinmc42
Mon Oct 28, 2019 1:46 am
Forum: Compute Module
Topic: High bandwidth interface to FPGA?
Replies: 27
Views: 7216

Re: High bandwidth interface to FPGA?

... Lattice have some tiny FPGAs with MIPI. So instead of parallel a serial interface might be used. Rawcam software? Image pipeline is not needed. LVDS is easier to design, just.
by nox404
Sun Oct 27, 2019 4:22 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI to LVDS
Replies: 8
Views: 1006

Re: DSI to LVDS

Hello,
Working on the same thing :)

We got the DSI to output the signal but this output seems to be in 800x480... Even with the framebuffer width and height set.

How can we change the DSI output to be in another res ?

Thanks for your help
by BEB
Sun Oct 27, 2019 4:18 pm
Forum: Compute Module
Topic: High bandwidth interface to FPGA?
Replies: 27
Views: 7216

Re: High bandwidth interface to FPGA?

... again? If you use a 16bit wide bus then 80MB/s would be more realistic? It is hard to switch cmos 3V3 logic faster than 100-200MHz. That's why LVDS is "low voltage" and DDRAMs have lower voltage I/O etc. I have stuck a cro probe on that 125MHz GPCLK0, it was not a full voltage rail to rail ...
by Gavinmc42
Mon Oct 21, 2019 2:15 am
Forum: Compute Module
Topic: High bandwidth interface to FPGA?
Replies: 27
Views: 7216

Re: High bandwidth interface to FPGA?

... again? If you use a 16bit wide bus then 80MB/s would be more realistic? It is hard to switch cmos 3V3 logic faster than 100-200MHz. That's why LVDS is "low voltage" and DDRAMs have lower voltage I/O etc. I have stuck a cro probe on that 125MHz GPCLK0, it was not a full voltage rail to rail ...
by sisyphos
Sat Oct 12, 2019 6:42 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Nexus 7 LCDs
Replies: 74
Views: 51619

Re: Nexus 7 LCDs

While this is a bit of an older threat, first thanks to @aBUGSworstnightmare for the really nice read up, also on the other thread LVDS add-on for Raspberry models with 40pin GPIO ! Quite educating! For my Raspberry Pi Zero I went the SPI route to connect a 320x230 TFT. But then I desired ...
by 6by9
Wed Oct 09, 2019 10:30 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI to LVDS
Replies: 8
Views: 1006

Re: DSI to LVDS

Output size is defined in the /boot/config.txt so that it uses [email protected] 24pp. Wich is the target screen size. How? There are hdmi_timings and dpi_timings parameters, but no dsi_timings. DSI has more parameters to setup than either of the others. You can also change the size of the framebuffer,...
by Maelkin
Wed Oct 09, 2019 9:35 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI to LVDS
Replies: 8
Views: 1006

Re: DSI to LVDS

Output size is defined in the /boot/config.txt so that it uses [email protected] 24pp. Wich is the target screen size. Rendering config works on 7" official touchscreen. As i understand detection of the screen is done trough i2c, I tried to modify panel-raspberrypi-touchscreen.c but it's not even loaded...
by 6by9
Wed Oct 09, 2019 8:49 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI to LVDS
Replies: 8
Views: 1006

Re: DSI to LVDS

Well the only thing I'm missing is a way to force the rpi to output video over DISP1 even if no screen is detected. Is there a way to do that? No because it has no idea over the timings for that output. What is it? [email protected] 24bpp, [email protected] 16bpp, any random width x height @ some refresh r...
by Maelkin
Wed Oct 09, 2019 8:03 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI to LVDS
Replies: 8
Views: 1006

Re: DSI to LVDS

Thanks for the reply,

Well the only thing I'm missing is a way to force the rpi to output video over DISP1 even if no screen is detected.
Is there a way to do that?
by 6by9
Mon Oct 07, 2019 10:22 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI to LVDS
Replies: 8
Views: 1006

Re: DSI to LVDS

The firmware driver for the DSI screen is locked to the the Pi screen, and 800x480 @ 60fps. There is support for 3rd party DSI screens via the full KMS driver. Please see https://github.com/anholt/linux/wiki/Raspberry-Pi-and-other-MIPI-DSI-display-panels for details. We don't provide support for add...

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