77 lines
2.0 KiB
Plaintext
77 lines
2.0 KiB
Plaintext
Pandaboard
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==========
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This file documents the Buildroot support for the Pandaboard, a
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low-power, low-cost single-board computer development platform based
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on the Texas Instruments OMAP4 system on a chip (SoC).
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Configuring and building Buildroot
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----------------------------------
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Start from the defconfig:
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$ make pandaboard_defconfig
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You can edit build options the usual way:
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$ make menuconfig
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When you are happy with the setup, run:
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$ make
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The result of the build with the default settings should be these files:
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output/images
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├── MLO
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├── omap4-panda-a4.dtb
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├── omap4-panda.dtb
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├── omap4-panda-es.dtb
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├── rootfs.ext4
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├── u-boot.img
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└── zImage
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Setting up your SD card
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-----------------------
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*Important*: pay attention which partition you are modifying so you don't
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accidentally erase the wrong file system, e.g your host computer or your
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external storage!
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In the default setup you need to create two partitions on your SD card:
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a boot partition and a rootfs partition.
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The ROM code from OMAP processors need the SD card to be formatted with
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a special geometry in the partition table. To do that, you can use the
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shell script below (this script was extracted from
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http://elinux.org/Panda_How_to_MLO_%26_u-boot).
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#!/bin/sh
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DRIVE=$1
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if [ -b "$DRIVE" ] ; then
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dd if=/dev/zero of=$DRIVE bs=1024 count=1024
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SIZE=`fdisk -l $DRIVE | grep Disk | awk '{print $5}'`
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echo DISK SIZE - $SIZE bytes
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CYLINDERS=`echo $SIZE/255/63/512 | bc`
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echo CYLINDERS - $CYLINDERS
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{
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echo ,9,0x0C,*
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echo ,,,-
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} | sfdisk -D -H 255 -S 63 -C $CYLINDERS $DRIVE
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mkfs.vfat -F 32 -n "boot" ${DRIVE}1
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mke2fs -j -L "rootfs" ${DRIVE}2
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fi
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The next step is to mount the sdcard's first partition and copy MLO
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and u-boot.img to it.
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$ sudo mkdir -p /mnt/sdcard
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$ sudo mount /dev/sdX1 /mnt/sdcard
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$ sudo cp MLO u-boot.img /mnt/sdcard
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$ sudo umount /mnt/sdcard
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The last step is to copy the rootfs image to the sdcard's second
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partition using 'dd':
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$ sudo dd if=rootfs.ext4 of=/dev/sdX2 bs=1M conv=fsync
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