EndRun Tempus LX GPS, User Manual, Page: 73 / 116

T e m p u s L X G P S U s e r M a n u a l 61
"Smarter Timing Solutions"
Appendix
B
Upgrading the Firmware
Periodically, EndRun Technologies will make bug fixes and enhancements to our products available
for download from our website. All such downloads are freely available to our customers, without
charge. After you have downloaded the appropriate FLASH binary image file from the EndRun Tech-
nologies website, you are ready to perform the upgrade to your Tempus LX.
The firmware consists of two FLASH binary image files. One of these is the firmware for the Tempus
LX itself. This firmware executes on the IBM-compatible CPU and contains the embedded Linux
operating system and NTP specific application software. The other file is the firmware for the GPS
time and frequency subsystem. Each of these files may be upgraded independently, although some
upgrades require both images to be modified together.
What You Need To
Perform the Upgrade
You will need to use
ftp
or
scp
to transfer the binary image file(s) to the Tempus LX. This means
that you must place the previously downloaded file(s) in a place on your network which is accessible
to the Tempus LX.
Performing the
Linux/NTP Upgrade
There are two FLASH disk partitions which hold the compressed Linux root file system images.
These partitions are raw FLASH blocks, have no file system and may not be mounted. They are ac-
cessed through low-level devices. To protect the factory root file system from accidental erasure or
over-writing, the device node has been deleted. The upgrade FLASH disk partition is accessed via
/dev/rootfs_1
. When performing an upgrade, you will be copying the new image to this device.
CAUTION
Some browsers will automatically unzip the gzip file when downloading from the website. Please make
sure that the gzip file is less than 6M in size before proceeding. Upgrading the partition with a too-large
file size can cause serious problems and the unit may have to be returned to the factory for re-program-
ming.
To perform the upgrade, log in as the
root
user to the Tempus LX using the local console serial I/O
port,
telnet
or
ssh
and perform these operations:
First erase the upgrade partition by issuing this command at the shell prompt:
eraserootfs_1