I find it curious the console is empty. In my experience, if the am335X ROM code can't find MLO, it fills the console with ''C''s every couple of hundred mS.
You can use RAW mode where the ROM code will search sector 0, 256, 512 or 768 for a valid signature. As your MBR goes in sector 0, what happens if you place MLO at sector 256: dd if=MLO of=/dev/sdb bs=512 seek=256 count=256 conv=notrunc blockdev --flushbufs /dev/sdb U-Boot SPL should then try to load u-boot.img from your FAT32 partition. On Wed, Nov 25, 2015 at 6:14 PM, Madhukar Sah <[email protected]> wrote: > Forgot to say one thing. Doubting my MLO and uboot image file, i copied > the MLO and u-boot.img file from the eMMC into my system and copied it to > the SDCARD's FAT32 boot partition. I did not copy the uEnv.txt file as it > is required by the u-boot.img only(i guess). But it still did not work. I > was expecting that at least i will get some debug messages from the MLO but > the debug console is completely empty. > > > On Wednesday, November 25, 2015 at 1:00:34 PM UTC+5:30, Madhukar Sah wrote: >> >> I have beaglebone black element14 board. My board is booting perfectly >> fine from eMMC. I want to boot it via SD CARD so downloaded the uboot fron >> denx site, compiled and generated the *MLO* and *uboot* image >> file.Followed the procedure of portioning the SD CARD into fat32 and ext4 >> and copied the the MLO and *u-boot.img* file using the *cp* command to >> the fat32 partition. >> >> I followed the prescribed mechanism of pressing the S2 push button before >> applying the power(*I am only using USB for purpose of power and no >> external power*). But after connecting the USB , the boards power LED >> glows but nothing appears on the console. The console cable is working as >> when i was booting from eMMC, i used to get debug messages on the console. >> >> I read somewhere that i need to change the MLO file name in the eMMC.I >> did and now it is neither booting from eMMC nor from the SD card. >> >> Request help please. >> >> I >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
