Rockbox Development > New Ports
Rockbox Player - Project to design and build a Free/Open hardware audio player
Sonic:
Sure, the OLED display looks sweet, but... 128x128? In my opinion, 128x128 would only be good for music. And as RockBox can be used for video and photo viewing, and for playing games, shouldn't the screen at least meet the industry standard of 320x240?
scharkalvin:
--- Quote ---shouldnt' the screen at least meet the industry standard of 320x240?
--- End quote ---
Well 128x128 would be good enough for proof of concept. But you are right, a 320x240
(or 240x320) would be better. The latter gives more room for text info and can be rotated
90 degrees for video.
casainho:
--- Quote from: Sonic on January 30, 2008, 04:18:08 PM ---Sure, the OLED display looks sweet, but... 128x128? In my opinion, 128x128 would only be good for music. And as RockBox can be used for video and photo viewing, and for playing games, shouldn't the screen at least meet the industry standard of 320x240?
--- End quote ---
Please read the page of the project: http://www.rockbox.org/twiki/bin/view/Main/RockboxPlayer
One objective of the project: Good quality hardware audio player and recorder - no video player or game console;
mzandrew:
--- Quote from: spark on January 30, 2008, 09:23:54 AM ---oled display
can we have datasheets of the oled display? how many colours does it support?
--- End quote ---
It's 18 bit color, so 262,144 or so.
cashainho's correct, it's sparkfun's oled display.
Datasheet for the controller: http://www.sparkfun.com/datasheets/LCD/SSD1339_1.7.pdf
--- Quote from: spark on January 30, 2008, 09:23:54 AM ---spi flash or NAND flash
--- Quote from: casainho ---Rockbox will be stored in spi flash and be copied to ram upon bootup. This means that it will be necessary a larger SDRAM value?
--- End quote ---
Why not NAND flash? We can have a 8Gbit (1GByte) NAND flash for $16. This can serve as firmware space as well as media storage.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=557-1373-1-ND
Linux can also be used. you can literally swim inside here. :)
It can also save you from buying an SD card.
--- End quote ---
I want to save as much space as possible on the main board, so I opted for spi flash because it comes in an 8 pin package. And you can only get spi flash (dataflash) that's a few mebibytes in capacity.
I'm not opposed to using soldered-down flash for another rockbox player, it's just this first one I want to be just sd cards.
--- Quote from: spark on January 30, 2008, 09:23:54 AM ---Mobile SDRAM
Yes, unfortunately these low voltage (1.8V) SDRAMs are only available in BGA package. So we have to stick to 3.3V SDRAMs. :(
--- End quote ---
The atmel at91sam9260 can use 3.3V or 1.8V ram on the external bus interface. It really is just a question of being able to solder a BGA without the great expense of having a company assemble it for us.
As I told casainho via instant messaging, I have access to an infrared lamp BGA rework machine, so it might be possible to do it, but I still would like this project to result in a board that an advanced amateur electronics hobbyist can assemble himself without any expensive tools.
mzandrew:
--- Quote from: spark on January 30, 2008, 04:02:46 AM ---Could you post more info about your oled clock project?
--- End quote ---
Here's the write-up for the project I submitted as part of my class last semester. It has gobs of details:
http://arm7-oled-clock.googlecode.com/files/arm7-oled-clock-project-write-up.pdf
--- Quote from: spark on January 30, 2008, 04:02:46 AM ---You seem to have PCB design experience. which tools do you use?
--- End quote ---
I used the unregistered version of Eagle. I found it to be very good. It has a few bugs / imperfections, but it doesn't crash. I suppose I'll have to give them the $50 registration fee if we actually make a commercial product out of this. :)
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version