Stephen Berry wrote: > Jeff Cooper wrote: >> Stephen Berry wrote: >>> Jeff Cooper wrote: >>> >>>> Stephen, >>>> >>>> Have you used a BDI2000 to flash the NAND on a DM355 EVM board? I was >>>> under the impression that a BDI2000 could only write to NOR flash and >>>> wouldn't work with the DM355 EVM. >>>> >>>> >>> It can't flash to NAND directly. I downloaded the UBL and u-boot into >>> the DSP memory using the BDI2000. Then once you run u-boot you can flash >>> your images (ubl, u-boot and uImage) into NAND. It's a pain in the butt, >>> but it works. The hardest part is creating the magic number blocks. >>> >> Ahh, that makes sense. >> >> I'd managed to brick my board trying to update U-Boot and haven't hand >> any luck restoring it yet. I was going down the route of using CCS >> v3.3 and a BlackHawk 510 USB emulator to communicate with the board. >> Unfortunately, the GEL file I downloaded from Spectrum Digital doesn't >> seem to startup correctly. It complains about a infinite loop. It >> looks like it's getting stuck setting up the PLL1. >> >> What do you mean be 'creating the magic number blocks'? Did you have >> to modify the U-boot images distributed from TI? >> > The 355 (and I would imagine any ARM based DaVinci) uses boot > descriptors. The boot descriptor tells the boot loader where to get the > UBL image in NAND, how big it is and the entry point. UBL has the same > construct for u-boot. Check out the Ti doc sprufb3 - this gives all the > details of how the 355 boots. > > The magic number is embedded in the boot descriptor.
Since we were loading everything into sdram via the JTAG, and then copying it to NAND with u-boot, we had to create the magic number blocks ourselves. You could also use the serial boot, also described in the document Steve referenced. The code that implements the serial boot/download/flash process also constructs the descriptors that you need. There is more info on the serial boot, and a pointer to application code for the 6446, at http://wiki.davincidsp.com/index.php?title=Flashing_NAND_Flash and in the documents spraai0.pdf and spraai4.pdf. We used the JTAG instead of the serial port because we hadn't bothered to port the serial UBL, etc. to our board. >>>> If you do have it working, could you post your configuration file that >>>> you used? >>>> >>>> >>> Ahh... well I am not sure. I think it was set up for the 6446 initially >>> and I just plugged it into our new card. I'll have to check. >>> >> That's ok, if it's just a 6446 configuration, I've got one of those >> that works. >> >> thanks, >> Jeff >> > > _______________________________________________ > Davinci-linux-open-source mailing list > Davinci-linux-open-source@linux.davincidsp.com > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
