On Fri, Nov 18, 2016 at 6:22 AM Paul Plankton <[email protected]> wrote:
> Hm, still not working. I have a MLO-file which works smoothly out of a > FatFS partition but when I try to write it to the MMC directly with > > sudo dd if=./MLO of=/dev/mmcblk1 count=1 seek=1 bs=128k > Do you have its target u-boot.img as well? I'm not sure of the behavior without it. The "CCCC" certainly says it the chip is trying other (serial) boot modes. Have you tried adding any debug statements to your MLO? How did you build it? Is the only reason you are confident of its format because you used it in the FAT partition? Are you certain that this is the code that ran when you had it in the FAT partition and that it is formatted with the appropriate headers? You might share a small hexdump of the head and tail of your MLO. > > and/or > > sudo dd if=./MLO of=/dev/mmcblk1 count=1 bs=128k > This one would overwrite the partition information. That isn't good. > > the board does not boot afterwards, console only prints "CCCC". What else > could be missing? > > > Am Dienstag, 8. November 2016 19:29:15 UTC+1 schrieb RobertCNelson: > > On Tue, Nov 8, 2016 at 12:24 PM, Paul Plankton <[email protected]> > wrote: > > Hi, > > > > I again played yround a bit with this. My first try was an operation > > > > sudo cp /dev/random /dev/mmcblk1 > > > > From my understanding this should erase the onboard MMC completely > together > > with all boot data. Nevertheless when I try to boot from a board erased > in > > this way, there is still a u-boot coming up with a bunch of messages. > > Finally it of course fails because it can not find an operating system - > but > > where does this boot sequence come from? It can't be on the on-board MMC > and > > a SD-card is not inserted! > > Or just: > > sudo dd if=/dev/zero of=/dev/mmcblk1 bs=1M count=10 > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > > -- > 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]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/5135ad29-c918-4fad-b65f-36ddd545c0a5%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/5135ad29-c918-4fad-b65f-36ddd545c0a5%40googlegroups.com?utm_medium=email&utm_source=footer> > . > 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CA%2BT6QPmrRvy-QURPvZ1o9%3DL2VG3DvHzGi43V49hQ47JQD3x_wQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
