Mr. Peter ,
I did what you asked. It did print "C" around 10 times. But it is
printing it when i give power to the board and do not press any boot button
and around 1 min or so it prints a sequence of "C".
On the contrary when i press the boot button and wait nothing is
printing.
Shall i use an external power supply and check rather than relying on
USB power(I am not a hardware guy). Do you think it might be the reason?
I flashed the MLO image found in the eMMC chip (that i copied to my
laptop before changing its name). Do you think that would have worked? If
not can you send me the working MLO and u-boot.img file so i can test with
it.
On Wed, Nov 25, 2015 at 5:58 PM, Peter Wilson <[email protected]> wrote:
> 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 a topic in the
> Google Groups "BeagleBoard" group.
> To unsubscribe from this topic, visit
> https://groups.google.com/d/topic/beagleboard/Qer9wwLySRI/unsubscribe.
> To unsubscribe from this group and all its topics, 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.
