On Thu, Nov 26, 2015 at 2:04 AM, Madhukar Sah <[email protected]> wrote:
> I downloaded the MLO and u-boot images from the above mentioned sites. But
> that did not work as well. Following is what i did step by step.
>
> 1. Renamed the MLO-am335x_evm-v2015.10-r12 to MLO
> 2. Renamed the u-boot-am335x_evm-v2015.10-r12.img to u-boot.img
> 3. Ran the following script( which i downloaded from one of the sites) to
> partition the SDCARD
> -------------------------------------------------------------------------------------------------------------------------------------------------------
> #!/bin/bash
>
> #
> # Script for formatting SD Card for booting Linux.
> #
> # Author: David Weber
> # Copyright (C) 2011 Avnet Electronics Marketing
> #
> # This program is free software; you can redistribute it and/or modify
> # it under the terms of the GNU General Public License as published by
> # the Free Software Foundation; either version 2 of the License, or
> # (at your option) any later version.
> #
> # This program is distributed in the hope that it will be useful,
> # but WITHOUT ANY WARRANTY; without even the implied warranty of
> # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> # GNU General Public License for more details.
> #
> # You should have received a copy of the GNU General Public License
> # along with this program; if not, write to the Free Software
> # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> #
>
> function print_msg()
> {
> echo ""
> echo
> "--------------------------------------------------------------------------------"
> echo " $1"
> echo
> "--------------------------------------------------------------------------------"
> }
>
> device=/dev/sdb;
>
> # check command arguments
> if [ "$#" -lt "1" ]; then
> echo "usage: sudo $0 <disk> [part1 size (MB)] [part2 size (MB)]"
> exit;
> fi
>
> if [ ! -b "${device}" ]; then
> print_msg "Error: device ${device} not found"
> exit
> fi
>
> # setup some constants
> n_heads=255
> n_sectors=63
^ That was a bug in x-loader, around 2009, fixed a long time ago..
> sector_sz=512
>
> # setup some defaults
> part1_MB=120
>
> if [ "$#" -gt "1" ]; then
> part1_MB=$2
> fi
>
> part1_n_cyl=`echo ${part1_MB}*1024*1024/${sector_sz}/${n_heads}/${n_sectors}
> | bc`
> part2_n_cyl=
>
> # if the second partition size is specified, calculate n cylinders for it
> if [ "$#" -gt "2" ]; then
> part2_MB=$3
> part2_n_cyl=`echo
> ${part2_MB}*1024*1024/${sector_sz}/${n_heads}/${n_sectors} | bc`
> fi
>
> # setup partition types
> dos=0x0C
> linux=L
>
> # assign partition types to each partition
> part1_type=${dos}
> part2_type=${linux}
>
> # assign partition labels to each partition
> part1_label=boot
> part2_label=root
>
> # unmount any existing device partitions
> print_msg "Unmounting any mounted partitions on ${device}"
> devlist=`df | grep ${device}`
> if [ "$devlist" != "" ]; then
> df | grep ${device} | awk '{print $1}' | xargs umount
> fi
>
> mbr_sz=532
> mbr_file=sd.mbr.dd
>
> # see man page for sfdisk for more info
> print_msg "Clearing MBR (first ${mbr_sz} bytes) of ${device}"
> dd of=${device} if=/dev/zero bs=${mbr_sz} count=1
>
> # create partition table
> print_msg "Creating partition table on ${device}"
>
> # look for the MBR saved from a previous execution of this script
> if [ -f "${mbr_file}" ]; then
> dd of=${device} if=${mbr_file} bs=${mbr_sz} count=1
> else
> fdisk ${device} > /dev/null << EOF
> w
> EOF
> # save off the MBR so we can avoid running fdisk next time this script
> runs, because
> # fdisk always produces a warning message
> dd of=${mbr_file} if=${device} bs=${mbr_sz} count=1
> fi
>
> # calculate number of cylinders on disk
> device_sz=`blockdev --getsize64 ${device}`
> n_cylinders=`echo ${device_sz}*1024/${n_heads}/${n_sectors}/${sector_sz} |
> bc`
>
> # create the partitions on the disk
> print_msg "Creating boot and root partitions on ${device}"
> sfdisk -D -H ${n_heads} -S ${n_sectors} -C ${n_cylinders} ${device} << EOF
> ,${part1_n_cyl},${part1_type},*
> ,${part2_n_cyl},${part2_type},-
> EOF
^ That's broken in sfdisk >= 2.26.x
>
> # insure that the kernel is aware of the new partitions
> partprobe ${device}
>
> # format the partitions
> print_msg "Formatting (FAT32) boot partition ${device}1"
> mkfs.vfat -F 32 -n "${part1_label}" ${device}1
>
> print_msg "Formatting (EXT3) root partition ${device}2"
> mkfs.ext3 -L "${part2_label}" ${device}2
>
> # list the partitions to verify success
> sfdisk -l ${device}
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> 4. Pulled out the SD card USB adaptor and inserted it again.
>
> 5. Created the boot and root directories in /media
>
> #sudo mkdir /media/boot
> #sudo mkdir /media/root
>
> 6. Mounted the /dev/sdb1(the fat32 partition) and /dev/sdb2(the root
> partition)
>
> #sudo mount /dev/sdb1 /media/boot
> #sudo mount /dev/sdb2 /media/root
>
> 7. Copied the MLO and u-boot.img file to boot mount
>
> #sudo cp ./MLO /media/boot
> #sudo cp ./u-boot.img /media/boot
>
> 8. Unmounted the boot and root partitions
>
> #sudo umount /media/boot
> #sudo umount /media/root
>
> 9. Pulled out the usb adaptor from the PC
> 10. removed the sdcard from that and inserted in the beaglebone sdcard slot
> 11. Pressed the boot button and given power
> 12. NOTHING CAME ON THE CONSOLE
> 13. pulled out the power and given again without pressing the boot button,
> and after around 1 min got sequence of "C" on the console.
I gave you a link for a reason:
https://eewiki.net/display/linuxonarm/BeagleBone+Black#BeagleBoneBlack-SetupmicroSDcard
Regards,
--
Robert Nelson
https://rcn-ee.com/
--
For more options, visit http://beagleboard.org/discuss
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