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Quote from: casainho on April 30, 2009, 05:30:17 AMNOTE: We pretend to use internal NAND Flash for booting and not the SD Card. That NAND will hold RB bootloader + firmware. SD Card for music files (expansion storage).I suppose you mean "plan" or "are going" and not pretend in the above text. Look up what pretend means...
NOTE: We pretend to use internal NAND Flash for booting and not the SD Card. That NAND will hold RB bootloader + firmware. SD Card for music files (expansion storage).
Quote from: scharkalvin on April 29, 2009, 08:05:24 AMQuote from: casainho on April 29, 2009, 07:59:03 AMI think system will use NAND flash for boot but can also boot from SD Card (although I don't know how we will do with the royalties for using SD bus).IIRC you only have to worry about royalties if you use the SD mode. If you use the spi mode to talk to the SD card you don't have pay any royalties.The spi mode might be a little slower since in SD mode you can transfer several bits at a time.Ok. The card is wired with a 4-bit bus but is the same for MMC and SD. For MMC there is no royalties, so, the final user will have just to pay if uses SD.On LPC manual we can read: "LPC3130/31 boot ROM interacts with memorycards in 1-bit bus mode only." So I think it reads the card by SPIwhile trying to boot. SD BUS is 4-bit mode while SPI 1-bit, I think, so, it can boot without the need to pay royalties for using SD Card.Now I must see if with the 4 wires for SD bus it can also uses 1 wire, to avoid the royalties and have the same schematic/wirings and give the people all the possibilities.
Quote from: casainho on April 29, 2009, 07:59:03 AMI think system will use NAND flash for boot but can also boot from SD Card (although I don't know how we will do with the royalties for using SD bus).IIRC you only have to worry about royalties if you use the SD mode. If you use the spi mode to talk to the SD card you don't have pay any royalties.The spi mode might be a little slower since in SD mode you can transfer several bits at a time.
I think system will use NAND flash for boot but can also boot from SD Card (although I don't know how we will do with the royalties for using SD bus).
Are the royalties really high or something? You're planning to sell this player, it seems odd to me that you'd engineer it to have a disadvantage when you can pass the cost onto customers.It seems advertising "It's slower that other players for accessing SD cards" is probably not ideal.
Hi Casainho,I have a question on the LyreLittlePrototype.http://www.rockbox.org/twiki/bin/view/Main/LyreLittlePrototypethis question is about your page on rockboxplayer-Revision 225,http://rockboxplayer.googlecode.com/svn-history/r225/trunk/tools/sam-ba_cdc_2.8.linux_01/applets/at91lib/peripherals/ac97c.c/http://rockboxplayer.googlecode.com/svn-history/r225/trunk/tools/sam-ba_cdc_2.8.linux_01/applets/at91lib/peripherals/ac97c/is this code for the AT73C213 (qfn 32) chip?http://www.atmel.com/dyn/products/product_card.asp?part_id=3591It sells for around $4 but, this code seems to reference the AT91SAM9263 chip.
You can get PCB's printed? I thought that was just for huge orders from big companies. The housing wouldn't be too hard, check out the projects on http://www.benheck.com. I still think writing firmware would be the hardest, because you can't get much more than rockbox devs anyway.For the future I would recommend a dual-core CPU, because I've read that will be the fastest way to decode video and audio without an external chip. The problem is, nobody knows how to use both cores yet.
I got my board finally and I got Rockbox firmware running. Read more here.
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