• State TI Thinks Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 3 answers
  • Subscribers 98 subscribers
  • Views 2268 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

trouble booting after going through tutorial

Matt Denoncour
Prodigy 200 points
Other Parts Discussed in Thread: UNIFLASH

Hello,

I'm going though the tutorial for flashing the eMMC over USB on the beaglebone black here: http://processors.wiki.ti.com/index.php/Sitara_Linux_Program_the_eMMC_on_Beaglebone_Black 

On the final step when I try to reboot and run from eMMC the boot fails. I used the flasher.sh script provided in the tutorial and made sure the BOOT_PARTITION and the ROOTFS_PARTITION match the files I'm serving up on the TFTP. The U-boot configured for USB-SPL doesn't seem to output the terminal over the ttyS0 so I can't tell what is going on and I just see "Starting Kernel..." then after a long time I get the Arago login. I presume this is tied into Uniflash somehow getting the terminal data over Ethernet or something like that?

One thing that wasn't clear was which rootfs image I should be using from sdk/filesystem: tisdk-rootfs-image-am335x-evm.tar.gz or arago-base-tisdk-image-am335x-evm.tar.gz. Currently I'm working from tisdk-rootfs-image-am335x-evm.tar.gz.

I've tried going through the script manually after the script finishes and I log in at the arago prompt and noticed I have to re-login after I run the partitioning command:

echo "Partitioning the eMMC..."
sfdisk -D -H 255 -S 63 -C $CYLINDERS $DRIVE << EOF
,9,0x0C,*
10,,,-
EOF

I don't know if that's normal or not. When I check the partion table with sfdisk -V /dev/mmcblk0 after running the script I get a reply saying that the partition table can't be found. However after I run the partition command myself I get a different output:

root@am335x-evm:~# sfdisk -V /dev/mmcblk0
sfdisk: Warning: partition 1 does not end at a cylinder boundary
sfdisk: Warning: partition 2 does not start at a cylinder boundary
sfdisk: Warning: partition 2 does not end at a cylinder boundary
sfdisk: partition 1: start: (c,h,s) expected (0,3,16) found (0,1,1)
sfdisk: end of partition 1 has impossible value for head: 254 (should be in 0-3)
sfdisk: end of partition 1 has impossible value for sector: 63 (should be in 1-16)

So it does appear that the partitioning in the script is not successful. Any ideas why this might be?

The u-boot has the following output when it tries to boot:

U-Boot SPL 2015.01-00001-gb2412df (Jan 29 2015 - 15:01:06)


U-Boot 2015.01-00001-gb2412df (Jan 29 2015 - 15:01:06), Build: jenkins-github_Bo
otloader-Builder-105

Watchdog enabled
I2C: ready
DRAM: 512 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
Using default environment

Net: <ethaddr> not set. Validating first E-fuse MAC
cpsw
Hit any key to stop autoboot: 0
gpio: pin 53 (gpio 53) value is 1
Card did not respond to voltage select!
Card did not respond to voltage select!
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
switch to partitions #0, OK
mmc1(part 0) is current device
gpio: pin 54 (gpio 54) value is 1
** No partition table - mmc 1 **
Checking for: /uEnv.txt ...
** No partition table - mmc 1 **
Checking for: /boot.scr ...
** No partition table - mmc 1 **
Checking for: /boot/boot.scr ...
** No partition table - mmc 1 **
Checking for: /boot/uEnv.txt ...
** No partition table - mmc 1 **
** No partition table - mmc 1 **
** No partition table - mmc 1 **
** No partition table - mmc 1 **
** No partition table - mmc 1 **
** No partition table - mmc 1 **
** No partition table - mmc 1 **

FAILSAFE: U-Boot UMS (USB Mass Storage) enabled, media now available over the us
b slave port ...
UMS: disk start sector: 0x0, count: 0x720000
musb-hdrc: peripheral reset irq lost!

  • 0
    TI__Guru 55345 points

    Hello Matt,

    tisdk-rootfs-image-am335x-evm.tar.gz contains Qt, graphics and test examples
    arago-base-tisdk-image-am335x-evm.tar.gz is a smaller rootfs which has no graphics

    Running a command inline in a terminal or by a script you should not get any difference.
    Have you changed the device name in the flasher.sh script?

    ## Declare eMMC device name here
DRIVE="/dev/mmcblk0"

    Could you boot over USB or SD Card and post the output of fdisk -l command?

    Best regards,
    Kemal

  • 0 in reply to Kemal R. Shakir
    Prodigy 200 points

    Hi Kemal,

    I did not change the device name, it seems to be correct as "/dev/mmcblk0" unless I'm missing something?

    After the script runs and I have booted over USB, running fdisk -l provides this:

    root@am335x-evm:~# fdisk -l

    Disk /dev/mmcblk0: 3825 MB, 3825205248 bytes
    4 heads, 16 sectors/track, 116736 cylinders
    Units = cylinders of 64 * 512 = 32768 bytes

    Disk /dev/mmcblk0 doesn't contain a valid partition table

    Disk /dev/mmcblk0boot1: 4 MB, 4194304 bytes
    4 heads, 16 sectors/track, 128 cylinders
    Units = cylinders of 64 * 512 = 32768 bytes

    Disk /dev/mmcblk0boot1 doesn't contain a valid partition table

    Disk /dev/mmcblk0boot0: 4 MB, 4194304 bytes
    4 heads, 16 sectors/track, 128 cylinders
    Units = cylinders of 64 * 512 = 32768 bytes

    Disk /dev/mmcblk0boot0 doesn't contain a valid partition table

  • 0 in reply to Matt Denoncour
    TI__Guru 55345 points

    Could you try to perform the steps from this post for eMMC programming.

  • 0 in reply to Kemal R. Shakir
    Prodigy 200 points
    That did work, but how do I get that to work in automated script form?
  • 0 in reply to Matt Denoncour
    Prodigy 200 points
    To clarify I'm working towards getting the method of programming sorted out for production (initial small scale) and I would like to use Uniflash.
  • 0 in reply to Matt Denoncour
    Prodigy 200 points

    I ended up figuring this out. I was able to modify the script to work with fdisk instead of sfdisk, using the sed approach here: http://superuser.com/questions/332252/creating-and-formating-a-partition-using-a-bash-script The fdisk included with the tiny file system was using BusyBox which behaved oddly, default first cylinder was 1 instead of first sector being sector 2048 as in your example with the full file system. I copied in the fdisk and shortcut from the full file system and the dependency libmartcols.so.1. I also added mkfs.ext4 so I could use the format you used in the example. I haven't tried this with Uniflash yet but it worked with Linux. Hope that helps anyone else that runs into this.