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by ceteras
Fri Jan 11, 2013 9:59 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39459

Re: Salvaging screen from old portable DVD player

I can't see clearly in the picture. If there is a circle on the package in the lower right corner, then pin 3 is the third on the right side of pins, counting from down upwards. Also the two pins which are soldered together on the upper horizontal row must be connected to the ground (as a second val...
by ceteras
Fri Jan 11, 2013 8:45 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39459

Re: Salvaging screen from old portable DVD player

That must be IR3Y29B. Video in is on pin 3. You need to trace connections from pin 3 to one of the two connectors with yellow wires. Usually it's like this: pin 3 is tied to a 10uF/16V electrolytic capacitor (brick shape) then a 75 or 47 ohm resistor to ground. Then some more small value resistors (...
by ceteras
Fri Jan 11, 2013 8:11 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39459

Re: Salvaging screen from old portable DVD player

I need the big one's precise name IR3Y-what?
The smaller 8pin from left-above must be a 4558.
by ceteras
Fri Jan 11, 2013 7:44 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39459

Re: Salvaging screen from old portable DVD player

HX8806ALA is a TCON (timing controller); it generates all the clocks and syncs required for proper operation of the LCD. There must be another square chip on the board, it could be underneath. Please look for it and post its marking and a picture if possible. The 4053 is a multiplexer, usually it is...
by ceteras
Fri Jan 11, 2013 3:16 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39459

Re: Salvaging screen from old portable DVD player

The display cannot be connected to GPIO. Please count the pin numbers at the flex cable connector for the LCD display. Also try to determine if pins 10 and 11 are connected together. It they are, and if the pin count is 26, this would mean the display is compatible with those I have and I could help...
by ceteras
Fri Jan 11, 2013 1:32 pm
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83515

Re: first design for an hdmi to lvds adapter

I've been working on this project last year, but unfortunately I've lost all my files in a crashed hard-drive.
The only copies I have are some older versions of it and I don't know when will I have time to work on this.

@Wire: what kind of lcd controllers do you have?
by ceteras
Thu Jan 10, 2013 1:49 pm
Forum: Other projects
Topic: Salvaging screen from old portable DVD player (working)
Replies: 76
Views: 39459

Re: Salvaging screen from old portable DVD player

The pdf file found by cainy393 is for a driver board that might or might not be for the given display. The display does not contain the IR3Y31M chip, so it alone does not support composite in. Please give the display model number. I believe that this board from ebay might be a proper board for your ...
by ceteras
Tue Dec 04, 2012 10:55 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

I see. The "simple and user-friendly plug-in architecture" idea was what I had in mind too. Maybe this can be done with I2C and a few gpio, but I'd rather use as little as possible from the gpio connector. I mean use just I2C and extend to another I2C and some more I/O through a mcu. This ...
by ceteras
Tue Dec 04, 2012 9:25 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

Would it be a good idea to have a small microcontroller connected to the Pi through I2C, to implement different dac and clock generation control on it, and to have an unified software interface between the Pi and this mcu? This way the driver would be written once, it would send commands to this mcu...
by ceteras
Mon Nov 12, 2012 11:57 am
Forum: Other projects
Topic: first design for an hdmi to lvds adapter
Replies: 78
Views: 83515

Re: first design for an hdmi to lvds adapter

Very interesting design. Since september, did you get it up and runnning in the meantime? Would you mind to share your design? Thank you! No change since September, I've been busy with some small projects. This hdmi project got me really tired at a time, and I needed to step away from it for a whil...
by ceteras
Fri Nov 02, 2012 3:31 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

What is I2S? I know what i2c is... I2S, also known as Inter-IC Sound, Integrated Interchip Sound, or IIS, is an electrical serial bus interface standard used for connecting digital audio devices together. It is most commonly used to carry PCM information between the CD transport and the DAC in a CD...
by ceteras
Wed Oct 31, 2012 4:22 pm
Forum: Linux Kernel
Topic: PCM module (I2S) drivers?
Replies: 20
Views: 21371

PCM module (I2S) drivers?

I've searched the forums without success, there is only this topic: I2S: Anyone got it running? which seems to touch on the subject, but still no hope. The question: Is anybody working on writing a sound driver for the hardware PCM module included in the Raspberry Pi? Or perhaps this driver is alrea...
by ceteras
Fri Oct 26, 2012 3:00 pm
Forum: Other projects
Topic: Samsung LCD display for Rasberry Pi
Replies: 7
Views: 7480

Re: Samsung LCD display for Rasberry Pi

aaa801 wrote:I posted the data sheet..
Please post it again, I only saw an url to a webpage and [a broken] one for a pdf which is a schematic diagram. The lcd module in the schematic has 37 pins, where the OP's has 39.

Are we talking about the same thing?
by ceteras
Fri Oct 26, 2012 10:26 am
Forum: Other projects
Topic: Samsung LCD display for Rasberry Pi
Replies: 7
Views: 7480

Re: Samsung LCD display for Rasberry Pi

Can you upload a close-up of the flex cable as seen in the first picture in your archive? It looks like some of the 39 signals have some testing points there, marked on the silkscreen. That could help... but still it take a lot of work to figure this out. Without a datasheet, you need to reverse eng...
by ceteras
Wed Oct 24, 2012 7:49 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

@Victor Martinez: you can leave the R3 resistor out, it's not needed for the PCM module. It's value can be found in the old schematics: 10K. I don't understand what you mean by "changed the clock to 1.4 KHZ". I know of no such clock that should be set at that value for I2S output. Edit: I'...
by ceteras
Tue Oct 23, 2012 1:31 pm
Forum: Networking and servers
Topic: Printserver for windows clients (Samba and CUPS)
Replies: 16
Views: 71868

Re: Printserver for windows clients (Samba and CUPS)

Thanks for posting this, I want to do exactly the same thing!

I'm wondering if the HDD goes in standby when not accessed for a while, to conserve power, is that possible on the Pi?
by ceteras
Tue Oct 09, 2012 11:24 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

I've built my dac, following the above schematic. +-6V (78L06 and 79L06), 3.3V for TDA1387. Opamps outputs are biased at -1V by the dac output currents, signal is around 2Vp-p, sounds good. I've connected the dac to an m-audio jamlab usb board, in parallel with it's own dac (they work at the same ti...
by ceteras
Fri Oct 05, 2012 3:00 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

How about this?
Patchwork ARM: add support for BCM2708/BCM2835 and Raspberry Pi

If this patch ends up in the official kernel, it will be one day included by default in the RPi images.
Cheers!
by ceteras
Fri Oct 05, 2012 2:19 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

Form Alsa project webpage: Takashi Iwai has written "Writing an ALSA Driver" - a very comprehensive guide to developing a device driver for ALSA. The document focuses mainly on the PCI soundcard. In the case of other device types, the API might be different. However the ALSA kernel API is...
by ceteras
Wed Oct 03, 2012 12:40 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

Thanks for the tips, I agree with you. I forgot to mention about the opamps, I'm not going to use TL072, but rather what I've got laying around, in this case I've already soldered a NJM2068D on a breadboard. It's ok for me to use a dual rail power supply, I've already got the parts. For now I'm more...
by ceteras
Tue Oct 02, 2012 11:19 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

This is a sketch of the dac I plan to build, it follows pretty much the datasheet, no fancy innovation.
Click the image for full size.

Image

The archived schematic (eagle 6.1.0) is attached below.
tda1387.zip
(62.22 KiB) Downloaded 603 times
by ceteras
Tue Oct 02, 2012 8:14 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

I didn't got it working, and I don't plan to start soldering anything to the Pi until I get all the specs clarified. I only made a lot of reading and a lot of calculations, also I plan to build a simple dac and test it with another source. I'm 100% sure I don't want to build something that works wit...
by ceteras
Mon Oct 01, 2012 10:13 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

What about this chip? It has an onboard PLL to generate MCLK, and only requires the 3-wire I2S itself: http://www.ti.com/product/pcm5102 That's a good find, I think it would work great with the PCM module in master mode. I've read this thread several times and I still need a clarification from Gert...
by ceteras
Wed Sep 26, 2012 11:15 am
Forum: Camera board
Topic: Status update
Replies: 52
Views: 27803

Re: Status update

I'm not really looking forward to buy one of these, but I'm looking forward the times when this will be ready for market and you guys free to do other amazing things for the Pi!
Still, that tiny board looks amazing, thanks for the update!
by ceteras
Thu Sep 20, 2012 8:39 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread. [I2S works]
Replies: 1001
Views: 576207

Re: I2S: Anyone got it running?

I believe the drivers question is more important. Hardware can be built/bought. I'd like to recommend a simple solution for a DAC, for beginners: TDA1387. This chip is no longer in production but can be found in old sound cards that no one wants anymore. The day after I've found out about it, I've b...

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