i.MX Processors中的主题 Re: LTIB ::: Problem with the Kernel Image

LTIB ::: Problem with the Kernel Image

KrishnaPavan — Fri, 21 Oct 2011 10:42:32 GMT

U-Boot 2009.08 (Sep 22 2011 - 18:55:30)

CPU:   Freescale i.MX51 family 3.0V at 800 MHz
mx51 pll1: 800MHz
mx51 pll2: 665MHz
mx51 pll3: 216MHz
ipg clock     : 66500000Hz
ipg per clock : 665000000Hz
uart clock    : 54000000Hz
cspi clock    : 54000000Hz
axi_a clock   : 166250000Hz
axi_b clock   : 133000000Hz
emi_slow clock: 83125000Hz
ddr clock     : 166250000Hz
esdhc clock   : 216000000Hz
Board: MX51 BABBAGE 3.0 [POR]
Boot Device: MMC
I2C:   ready
DRAM: 512 MB
MMC:   FSL_ESDHC: 0, FSL_ESDHC: 1
*** Warning - bad CRC or MMC, using default environment

In:    serial
Out:   serial
Err:   serial
PMIC Mode: SPI
Net:   got MAC address from IIM: 00:04:9f:02:09:65
FEC0 [PRIME]
Hit any key to stop autoboot: 0
*** ERROR: `serverip' not set
Wrong Image Format for bootm command
ERROR: can't get kernel image!
BBG U-Boot >

Later on nothing can be typed nor anything could not be entered.

I loaded the kernel image from the /ltib/rootfs/boot.......uImage properly only, even then i could not get the result.

Re: LTIB ::: Problem with the Kernel Image

VladanJovanovic — Fri, 21 Oct 2011 10:46:45 GMT

It is very weird that you're not able to type anything to u-boot prompt. Are you sure about that? Did you check setup properly (115200, 8n1). So no hardware flow control and handshaking signals used?

If you could type "printenv" and show u-boot environment setting it would be very helpfull...

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Fri, 21 Oct 2011 11:42:34 GMT

I could not....

reason I have u-boot.bin to be of a size of around 153KB,

But the sector size is 512 B, so I am getting the bad CRC or MMC Error.

grep search through my source files led me to this file...

ltib/rpm/BUILD/u-boot-29.08/common/env_mmc.c..

What that modification might & is my question?

Re: LTIB ::: Problem with the Kernel Image

VladanJovanovic — Fri, 21 Oct 2011 12:11:33 GMT

bad CRC... error is nothing special, it just says that in area allocated to store u-boot settings there is no data, so default setup will be used. You should still be able to communicate with u-boot. What about if you interrupt u-boot before it tries to load kernel?

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Fri, 21 Oct 2011 12:14:30 GMT

I amnot even able to interrupt to stop

Hit any key to STOP autoboot: in x seconds

I tried many times but could not interrupt.

I dont know how to resolve this?

I have been trying this for long time, yet could not get any output in my favour...........

Re: LTIB ::: Problem with the Kernel Image

VladanJovanovic — Fri, 21 Oct 2011 12:17:14 GMT

there's something wrong with your serial port setup or cable. Can you post a snapshot of your serial console settings in PC you're using?

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Fri, 21 Oct 2011 12:19:27 GMT

Re: LTIB ::: Problem with the Kernel Image

VladanJovanovic — Fri, 21 Oct 2011 12:27:50 GMT

Hm, looks good. Did you try with another serial cable? In the end, it might be there's something wrong with the board you have, might we worth checking signals with oscilloscope if you have that or then replace the board...

It's very unusual if you can't get any serial communication with u-boot.

What if you just type "printenv" and press enter? (not sure if local echo needs to be enabled, but I don't think so...)

Re: LTIB ::: Problem with the Kernel Image

daiane_angolini — Fri, 21 Oct 2011 12:30:56 GMT

double check your minicom (or screen) configuration:

http://www.imxdev.org/wiki/index.php?title=All_Boards_Serial_Console

make sure you´re using the right serial device.

Are you using VMWare image?????????????????????

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Fri, 21 Oct 2011 12:32:28 GMT

No Problem with the Cable, thats for sure I have got it double checked.

The point of concern is

my bootloader u-boot.bin is 153 KB, How to place it in the SD card slot and how to avoid the CRC error,

My bootloader is occupying more space where it cannot be read any more because it exceeded the space/ has started in a wrong place.

How to resolve this...

The error message *** Warning - bad CRC or MMC, using default environment

is found in /ltib/rpm/BUILD/u-boot.29.08/common/env_mmc.c

So, then there should be a connection....... Thats what I have been thinking.

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Fri, 21 Oct 2011 12:37:45 GMT

I am using linux ubuntu 10.04.

I have formatted my hard disk and installed linux on my system and am doing all this stuff related to i.MX5X EVK board.....

No Virtual Machine is used......

Re: LTIB ::: Problem with the Kernel Image

Don_ng — Fri, 21 Oct 2011 14:09:26 GMT

Try erasing that section of memory before you program it. I've run into this and erasing it and reprogramming seems to clear it up.

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Fri, 21 Oct 2011 14:12:36 GMT

Yeah! I have tried to program that section of the memory also many times...........

I tried to experiment with the partitions also.......

finally ended up with the correct procedure.............

But with the unresponsive prompt

Re: LTIB ::: Problem with the Kernel Image

daiane_angolini — Fri, 21 Oct 2011 18:02:48 GMT

I´ve never seem this behavior before.

Can you share command line you used to copy u-boot?

When I want to clear the first memory of a sdcard I copy a big image to sdcard and remake everything else.

Something like:

sudo dd if=some_huge_file of=/dev/sdbX

and then gparted stuff (rebuilt MBR and partitions)

and then copy uboot again.

it clears uboot variables too.

Re: LTIB ::: Problem with the Kernel Image

ManotSwasdee — Fri, 21 Oct 2011 18:41:47 GMT

Try a brand New SD Card. Partition the card with Linux EXT4 format with 15MB reserved for u-boot and kernel.

Install the uboot with 'sudo dd if=<your u-boot such as u-boot.bin from rootfs/boot directory> of=/dev/sdb bs=512 seek=1 skip=1'. I assume that your u-boot.bin is padded and the SD Card reader is mounted as '/dev/sdb'. Then try to see if it works better. Your card may be slow. Use good SD Card such as SanDisk with Class 2 or higher.

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Mon, 24 Oct 2011 07:38:25 GMT

sudo dd if=u-boot.bin of=/dev/sdb bs=512 && sync && sync
sudo dd if=uImage of=/dev/sdb bs=512 seek=2048 && sync && sync

sudo fdisk /dev/sdb
            u           [switch the unit to sectors instead of cylinders]
            d           [repeat this until no partition is reported by the ‘p’ command ]
            n           [create a new partition]
            p           [create a primary partition]
            1           [the first partition]
            8192        [starting at offset sector #8192, i.e. 4MB, which leaves enough space for the kernel, the boot loader and its configuration data]
            <enter>     [using the default value will create a partition that spans to the last sector of the medium]
            w           [ this writes the partition table to the medium and fdisk exits]

sudo mkfs.ext3 /dev/sdb1

mkdir /home/user/mountpoint
cd /home/user/ltib/ltib/rootfs

sudo mount /dev/sdb1 /home/user/mountpoint

sudo cp -rpa [A-z]* /home/user/mountpoint

sudo umount /home/user/mountpoint

These are the command lines.

I have gone through the link http://imxcommunity.org/group/ltib/forum/topics/where-are-these-images-in-ltib?commentId=4103961%3AComment%3A39454&xg_source=msg_com_gr_forum and saw the pic, and allocation of space, even the i could not get the result.

Re: LTIB ::: Problem with the Kernel Image

daiane_angolini — Mon, 24 Oct 2011 16:37:35 GMT

Does anything works on your board? I mean, is your hardware OK?

Is your sdcard ok?

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Mon, 31 Oct 2011 05:06:34 GMT

The Hardware is O.K.

I have tried with two new SanDisk 4 GB SD Cards.

I have tried by making the partitions as suggested by you and that from the i.MX_3D_Stack Users Guide from the freescale documents downloaded from freescale.com.

Even then the same error exists.....

*** Warning - bad CRC or MMC, using default environment

The error line is found in env_mmc.c file ltib/rpm/BUILD/u-boot-2009.08/common/env_mmc.c

There is some problem with the CRC Checks... I am trying to solve this issue..and am expecting some help...

Re: LTIB ::: Problem with the Kernel Image

daiane_angolini — Mon, 31 Oct 2011 11:43:12 GMT

I'm confused.

Why you're following i.MX_3D_Stack Users Guide if your board is iMX51?

Are you sure you're using the right u-boot version for your board?

Re: LTIB ::: Problem with the Kernel Image

KrishnaPavan — Mon, 31 Oct 2011 11:56:46 GMT

Hi Daiane..,

The procedure thats given is the same as that in the Linux_BSP_Users_Guide_for iMX51 Daiane ..

The u-boot version is proper

The procedure is correct, No Doubt about it.

I am getting everything changed right from Cable and the connecting modem. I have already changed a new SD Card.

I Hope to get some response... Krishna Pavan