If the ubl_nand.bin (coverted to text hex and all that) is received correctly and is then given control by the RBL, you should see the phrase
"Booting PSP Boot Loader" Then that will be followed by "Starting NAND Copy" If your NAND has a correct primary bootloader (i.e. u-boot) in it at the right place (if you used flashwriter_nand.out method to load the NAND with u-boot, this would be the case) then you'll boot. Otherwise you'll see "NAND Boot failed. Starting UART" "BOOTPSP" "BOOTPSP" (repeating forever) This is what the provided UBL_NAND will do if it starts running. If you see the BOOTME command instead, the UBL has never started and control has remained with the ROM boot loader. Daniel J. Allred Software Applications Catalog DSP / End Emerging Equipment -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Carlos Ojea Sent: Wednesday, September 27, 2006 1:50 AM To: taruna54 taruna54 Cc: [email protected] Subject: Re: davinci boot from uart > I'm using the same UBL for nand flash.. got the binary, converted it to text > hex.. and send it over UART, it seems no error on sending it (the CRC-32 has > been zeroed..), but still get back to BOOTME state again.. Ok. I think ubl_nand.bin (first stage boot loader for NAND) fails when it can't find the second bootloader, getting you back to the rom bootloader again. That is the reason why you get the BOOTME message again. (anyone agree/disagree with this?) What you need is another first stage bootloader, capable of intializing DDR and load through UART the second stage bootloader (uboot?). In this scheme, to write this fist stage bootloader it will be hepful to have the ubl_nand source code, but I think it is not avaliable. Regards, Carlos _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
