PIKA TechnologiesWarp Upgrade procedure for 2.2.x

Alain Gauthier13.07.10

Introduction

• Meant to explain how the Warp upgrade procedure works for version 2.2.x

Autorun execution• When a USB stick or SD is inserted and contains an autorun file, the latter is executed.• The LED will turn red to show that the autorun is being executed.• If the /usr/bin/.autorun.once file exist then it stops executing, LED turn green• If both USB and SD contain an autorun file, then it stops executing• If USB or SD are not writable then stop executing• Verify that /persistent is correctly mounted , if not stop executing• Verify that the IMAGE_CREATE_DATE is different from between autorun and

/persistent/version_info.txt• If they are the same then

• Remove uboot_autorun.scr from media (USB or SD)• Execute do_restore procedure (normally commented out)• Stop executing• Set green LED

• If uboot_autorun.scr from media exist then• Verify that the image versions between the media and what is currently on

the Warp are different• If they are not all different then stop executing

Autorun execution• Create uboot_autorun.scr in the media (USB or SD)

• This will contain all the uboot commands to upgrade the different partitions.

• Each partition file on the media is checked with it’s corresponding CRC• do_backup is invoked (normally commented)• Update IMAGE_CREATION_DATE in /persistent/version_info.txt• Turn LED green• Reboot

• When the unit reboots and Uboot is executing, Uboot will detect the uboot_autorun.scr from the media (USB or SD) and execute it.

• This will update each partition• At the end of the Uboot update, the kernel and ramdisk will start running and

the update process will be complete since the dates will now match.

Uboot_autorun.scr execution• When the unit reboots and Uboot is executing, Uboot will detect the

uboot_autorun.scr from the media (USB or SD) and execute it.• This will update each partition

• At the end of the Uboot update, the kernel and ramdisk will start running and the update process will be complete since the dates will now match.

PADS

• In PADS the autorun file is located in• <PADS_DIR>/images/autorun

Autorun customization

• Usually the only part that the user needs to be concerned are the following 2 functions

• do_backup()• Add which part you wish to backup

• do_restore()• Add which part you wish to restore after the backup has completed

• Then uncomment• # do_backup()• # do_restore()

Trick – minor updates

• Usually during minor updates, persistent files should not have been modified. • If you are sure of this then there is no need to update the persistent

partitions.• So when you copy the necessary image files to your media, such as the

Ramdisk file, so ramdisk-2.2.x-y.wrp

Reporting

• In the event that the upgrade failed, you may peruse the log file called• Upgrade-2.2.x-y.log

• Located on the media (USB or SD) and /persistent1

References

• PADS Users Guide• Release Notes