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by ceteras
Tue Jun 04, 2013 12:30 pm
Forum: Other projects
Topic: Where do you want to see FBTFT go next?
Replies: 99
Views: 37982

Re: Where do you want to see FBTFT go next?

I think that using an expander for 16bit interfaces would be more elegant. Such as the MCP23S17 for SPI or MCP23017 for I2C.
But these chips only provide 16bit, and no control for WR and CS signals.
Still, could this be somehow implemented?
by ceteras
Tue Jun 04, 2013 12:21 pm
Forum: Other projects
Topic: Cell Phone screens
Replies: 2
Views: 4964

Re: Cell Phone screens

Indeed, if you search the forum first, you can find your answer.

Smartphone screens are more likely to be DSI interfaced.
So google "dsi site:www.raspberrypi.org/phpBB3" .

Long story short: it will happen, but we the grasshoppers need to pay patience.
by ceteras
Tue Jun 04, 2013 9:57 am
Forum: Other projects
Topic: $61 HDMI LCD 800x480
Replies: 6
Views: 13605

Re: $61 HDMI LCD 800x480

This board is based on Realtek RTD2662 chip, which supports I2S output for HDMI. It's too bad if the board does not provide access to these pins/functionality (it doesn't seems so from the pictures) . Can anybody please post a high resolution picture of the board? Pins 108 - 114 are the I2S port and...
by ceteras
Tue May 28, 2013 7:31 pm
Forum: Other projects
Topic: Is 8bit to 6bit dithering possible?
Replies: 11
Views: 5409

Re: Is 8bit to 6bit dithering possible?

That would be great!
by ceteras
Tue May 28, 2013 4:12 pm
Forum: Other projects
Topic: Portable DVD player display
Replies: 1
Views: 993

Re: Portable DVD player display

If your video driver on the board is an IR3Y28/29/31, you can try hooking the C input to ground (switches the chip to composite input), and connect the video composite from the Pi directly to Y.
by ceteras
Tue May 28, 2013 11:24 am
Forum: Other projects
Topic: Is 8bit to 6bit dithering possible?
Replies: 11
Views: 5409

Re: Is 8bit to 6bit dithering possible?

The chain is: Raspi HDMI -> TFP401 DVI receiver on a board -> 6bit LVDS transmitter -> 6bit LCD panel. TFP401 is configured to output 24bit data (8bit), one pixel per clock. From those 24bit, only 18 are connected to the LVDS transmitter (6 most significant bits on each primary colour). TFP401 canno...
by ceteras
Tue May 28, 2013 10:48 am
Forum: Other projects
Topic: Is 8bit to 6bit dithering possible?
Replies: 11
Views: 5409

Is 8bit to 6bit dithering possible?

I've been working with some laptop LCD's and RPi, these screens are usually 6bit per primary colour, while the outputs from HDMI or DVI receivers are 8bit. If you connect the most significant 6bits from the receiver to the lcd's 6bits, you lose 2bits, and you get colour banding on your screen. 6bit ...
by ceteras
Mon May 20, 2013 10:00 pm
Forum: Linux Kernel
Topic: PCM module (I2S) drivers?
Replies: 20
Views: 19989

Re: PCM module (I2S) drivers?

Thank you for the update, and for the hard work, I hope to be able to test it as soon as possible!
I had no idea that progress was being made on this issue!
by ceteras
Fri May 10, 2013 6:41 pm
Forum: Other projects
Topic: rPi LCD screen integration
Replies: 9
Views: 30644

Re: rPi LCD screen integration

sixglazed wrote:This is awesome! How would you got about soldering the HDMI cable if your monitor only supports VGA?
If the monitor only supports VGA, you can't solder any hdmi wires. You need an active converter.
by ceteras
Thu May 09, 2013 10:13 am
Forum: Other projects
Topic: rPi LCD screen integration
Replies: 9
Views: 30644

Re: rPi LCD screen integration

The raspi detects a DVI monitor and switches the HDMI port signals to DVI protocol, that's how it works. In this case you don't need to add no framebuffer, the TSUMU58PWHL from the monitors mainboard is a dedicated video processor that has its own framebuffer and all needed algorithms for a perfect ...
by ceteras
Wed May 08, 2013 12:43 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 77841

Re: first design for an hdmi to lvds adapter

It looks as though you have put a lot of time and effort into this. One big problem that may occur with a project like this is matching up the right lcd to what the controller can handle. Yes, it took many hours, but it was fun. I will keep hacking it from time to time until I get a reasonable solu...
by ceteras
Tue May 07, 2013 6:34 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 77841

Re: first design for an hdmi to lvds adapter

Has anybody tried to take a HDMI / VGA to LVDS circuit board from a LCD TV that has a broken LCD and hook this up to a laptop display? I actually did something along these lines, but it's hardly reproductible. It was a sort of "scrapheap challenge" project for me. I use an HDMI input board from a S...
by ceteras
Mon Apr 15, 2013 7:13 am
Forum: Other projects
Topic: Is it posbible to connect this screen to the pi
Replies: 2
Views: 1175

Re: Is it posbible to connect this screen to the pi

There used to be controllers for this kind of displays on ebay, I'm quite surprised to see they are all gone now. I have one at home. The controllers would connect to the video complex signal from RPi's RCA output. Poor image quality, but enough for watching movies. Where do you have this panel from...
by ceteras
Fri Apr 12, 2013 7:50 am
Forum: Other projects
Topic: DVD screen
Replies: 15
Views: 5111

Re: DVD screen

Later edit: sorry, wrong answer, I didn't read the question carefully (not enough coffee this morning). I've sent you to a seller of converters+lcd panels, that's not what you've asked for. I'm sure you can find an HDMI to VGA converter if you search just that on Amazon. ____________________________...
by ceteras
Thu Apr 11, 2013 2:17 pm
Forum: Other projects
Topic: LCD - HMDI - LVDS to build a complete system
Replies: 8
Views: 7640

Re: LCD - HMDI - LVDS to build a complete system

So you have two boards, one working LCD with no backlight, and two other LCD's not working. You can fix one LCD, then you can test the boards to make sure they are ok. Now that I see the LCD LVDS connector, I imagine the problems could come from there. I'd like to see the LCD-side of the LVDS cable ...
by ceteras
Thu Apr 11, 2013 7:33 am
Forum: Other projects
Topic: LCD - HMDI - LVDS to build a complete system
Replies: 8
Views: 7640

Re: LCD - HMDI - LVDS to build a complete system

The only requirement is that the HDMI-LVDS adapter provides LVDS signals at the native resolution of the LCD display. Usually, these boards have more complex internals than just HDMI in and LVDS out. It's HDMI in, then the digital image is scaled up or down from the resolution provided by HDMI to a ...
by ceteras
Wed Apr 10, 2013 7:56 am
Forum: Other projects
Topic: DVD screen
Replies: 15
Views: 5111

Re: DVD screen

GelatiN wrote:
ceteras wrote:You cannot connect your LCD to that (they are different things).
there's no way ? even with the small board ?
With the small board you can connect it to the RCA video out on the Raspberry Pi, but not to the DSI port. DSI is out of reach for anyone except Broadcom anyway. Such an open design!
by ceteras
Wed Apr 10, 2013 7:54 am
Forum: Other projects
Topic: DVD screen
Replies: 15
Views: 5111

Re: DVD screen

The connector on the Pi is a DSI port. DSI can be converted with a board to parallel digital RGB interface for TFT LCD screens, or to LVDS (they say the Foundation will build one such board). Your screen is not a parallel RGB neither LVDS, its RGB inputs are analog. The screen is built to interface ...
by ceteras
Tue Apr 09, 2013 7:56 pm
Forum: Other projects
Topic: DVD screen
Replies: 15
Views: 5111

Re: DVD screen

You cannot connect your LCD to that (they are different things).
by ceteras
Tue Apr 09, 2013 4:43 pm
Forum: Other projects
Topic: DVD screen
Replies: 15
Views: 5111

Re: DVD screen

Interesting! Please post a clear picture of the other side of the PCB and a better one of the connector so we can read what is says. Or post here the pin descriptions, but the back side is important; if there are any chips, post their markings here. I was able to help someone else this way with a DV...
by ceteras
Tue Apr 09, 2013 4:39 pm
Forum: Other projects
Topic: LCD - HMDI - LVDS to build a complete system
Replies: 8
Views: 7640

Re: LCD - HMDI - LVDS to build a complete system

Can you describe in more detail the nature of the three failures? I would investigate this to know what to be careful with before moving on to other components for the project. I've never had such failures and I've often worked with diy approaches involving making my own cables and pcb's or even mod...
by ceteras
Tue Apr 09, 2013 11:27 am
Forum: Other projects
Topic: hp ipaq h2210
Replies: 13
Views: 5902

Re: hp ipaq h2210

When you can't find a complete datasheet for your LCD display, the only thing you can do with it is to sell it and purchase one that is documented. This is especially true for the mobile device LCDs. You can pretty much figure out a laptop display even if you don't have a datasheet, because you know...
by ceteras
Fri Apr 05, 2013 11:09 am
Forum: Other projects
Topic: hp ipaq h2210
Replies: 13
Views: 5902

Re: hp ipaq h2210

This LCD screen is not LVDS, but CMOS parallel 16bit interface.
Can you give its model number? Please type everything that is written on it.
by ceteras
Thu Mar 28, 2013 1:50 pm
Forum: Other projects
Topic: LCD from an old garmin navi - bit of help?
Replies: 6
Views: 6599

Re: LCD from an old garmin navi - bit of help?

Sorry, I took a look at the datasheet, it's no luck for you. This LCD requires a controller to drive it. There are no direct interface possibility with any of the Pi's ports. You might still use it for projects with certain microcontrollers that have integrated LCD controller, such as these ones: ht...
by ceteras
Wed Mar 27, 2013 3:00 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI interface relative Problem.
Replies: 7
Views: 1981

Re: DSI interface relative Problem.

I was hoping that the userland opensource drivers would do DSI too, after all, it is said to provide the link to the closed videocore engine (quote: "first ARM-based multimedia SoC with fully-functional , vendor-provided (as opposed to partial, reverse engineered) fully open-source drivers"). This m...

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