2009-01-20 01:52:04 Question about uclinux image file
Kaustubh Vaidya (INDIA)
Message: 68136
Hi ;
Sorry for asking a simple question but I am not getting which ELF file created in Images folder of uclinux directory will be useful for downloading on SDRAM of my custom BF532 board?
Thank you....................
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2009-01-20 09:34:06 Re: Question about uclinux image file
Mike Frysinger (UNITED STATES)
Message: 68151
please read the documentation:
http://docs.blackfin.uclinux.org/doku.php?id=uclinux-dist:images
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2009-01-20 17:33:01 Re: Question about uclinux image file
David Welch (UNITED STATES)
Message: 68166
I used "linux.initramfs"and downloaded it the the Stamp using the tftp process.
Also consider modifying the default RC file settings to boot directly from the network rather than having to use the serial connection each time. You will need to recompile the kernel.
/uClinux-dist/vendors/AnalogDevices/BF533-EZKIT/rc
hostname blackfin
mount -t proc proc /proc
mount -t ramfs ramfs /var
mount -t sysfs sysfs /sys
mount -t devpts devpts /dev/pts
[ -d /proc/bus/usb ] && mount -t usbfs usbfs /proc/bus/usb
[ -d /sys/kernel/debug ] && mount -t debugfs debugfs /sys/kernel/debug
[ -d /proc/sys/fs/binfmt_misc ] && mount -t binfmt_misc binfmt_misc /proc/sys/fs/binfmt_misc
[ -d /sys/kernel/security ] && mount -t securityfs securityfs /sys/kernel/security
grep -qs nfsd /proc/filesystems && mount -t nfsd nfsd /proc/fs/nfsd
if [ -e /bin/mdev ] ; then
echo /bin/mdev 2>/dev/null > /proc/sys/kernel/hotplug
/bin/mdev -s 2> /dev/null
fi
mkdir /var/tmp /var/log /var/run /var/lock
ifconfig eth0 YOUR CLIENT IP ADDRESS HERE up
dhcpcd &
ifconfig lo 127.0.0.1
inetd &
#cat /etc/issue
cat /etc/motd
While at the U-boot prompt you can add the environment variables to automatically download your compiled kernel and user apps with each reboot. The instructions are located here: http://docs.blackfin.uclinux.org/doku.php?id=downloading_to_the_target
-David
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2009-01-20 23:25:34 Re: Question about uclinux image file
Kaustubh Vaidya (INDIA)
Message: 68168
Thank you for the valuable suggestions . Ethernet connectivity is not available on my board so I must use serial connection for data transfer. As mentioned in Images document , Kernels that are in the bootable U-Boot format will typically contain Image in their name (such as uImage or vmImage), while kernels that are in the ELF format will typically contain linux in their name (such as linux or vmlinux).So as my board contains u-boot so is it benifitial to port uImage.initramfs on board?
Thank You...........................
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2009-01-21 03:33:57 Re: Question about uclinux image file
Mike Frysinger (UNITED STATES)
Message: 68173
i really dont know what you mean by "beneficial". as the document explains, the ELF and uImage formats contain the same things, just in different formats, and the uImages are typically smaller.
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2009-01-21 04:25:26 Re: Question about uclinux image file
Kaustubh Vaidya (INDIA)
Message: 68185
Sorry I didnt cleared what is mean by "beneficial".
I can download the image file from serial port only,it will take time to load big image file so "beneficial" means smaller size image file created in image folder. But as all image file contain same things so I can use smaller sized files right?.
If I booted image sucessfully from SDRAM & from next time I want to boot the kernel from spi flash then I need to load rootfs.jffs2 file from SDRAM to flash right?
Thank You................................
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2009-01-22 03:40:28 Re: Question about uclinux image file
Kaustubh Vaidya (INDIA)
Message: 68217
I reffered to jffs document for solving rootfs.jffs2 related querry.While reffering I did not understand first step
setting the source to describe the JFFS2 image location to the kernel
I did not understand what is source & kenel in this line ?
Kernel means image file like vmlinux or other file?
this rootfs.jffs2 is basically a kernel file or file system?
Thank You.............................
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2009-01-22 09:34:32 Re: Question about uclinux image file
Mike Frysinger (UNITED STATES)
Message: 68235
as the images document explains, all files that start with "rootfs." are file system images
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2009-01-22 22:54:49 Re: Question about uclinux image file
Kaustubh Vaidya (INDIA)
Message: 68258
So this means if I downloaded only rootfs.jffs2 file on spi flash then it is sufficient to boot the kernel from spi flash?
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2009-01-22 23:08:31 Re: Question about uclinux image file
Mike Frysinger (UNITED STATES)
Message: 68261
generally speaking, sure