EndRun FDC3302, User Manual

Page: 30 / 46

F D C 3 3 0 2 U s e r M a n u a l 20
A P P E N D I X B
After establishing communications with the distribution chassis using the desired port settings, issue
the following command to initiate the upload:
upload<CR><LF>
After issuing this command, you will see the distribution chassis respond with this message:
Waiting for download using XMODEM 128 or XMODEM 1K (both with CRC).
Control X will abort download.
CCC...
You will then see the distribution chassis send the character ‘C’ every three seconds while it is wait-
ing for you to begin uploading the image file. Should you need to abort the upload process now,
send CTRL-X to the distribution chassis. If you abort at this time, your current firmware will remain
intact. If you abort after the file transfer is in progress, you will not retain your original firmware and
will need to re-upload it.
Otherwise, start the upload using the appropriate method for your terminal program. During the
upload, your terminal program will display some sort of status indication. If the upload is successful,
you will see the distribution chassis reboot, displaying the firmware version information when it does.
Note the firmware version information at this time and verify that it is indeed the firmware that you
intended to upload to the distribution chassis. If it is, you have successfully upgraded the firmware.
Problems with the
Upgrade
Should you have difficulties with the upload due to a corrupt file, power failure during upload, or
other accident, do not be alarmed. Even though you may have lost the existing application program,
the distribution chassis bootloader program will remain intact. On boot up, it will check to see if a
valid application program is in the FLASH memory. If there is not, it will immediately go into the
‘waiting for download’ mode, sending the ‘C’ character every three seconds. You may then retry the
upload procedure, after you have corrected the original problem.
It is possible for the bootloader program to be fooled by a corrupted application program that has
been previously downloaded into FLASH. In this case, it will attempt to start the application pro-
gram. Generally this will result in a failure that will force a watchdog initiated reboot. This process
will be repeated indefinitely unless you intervene.
Recover
If the bootload/application launch sequence appears to be caught in a loop, type “recover” right after
the bootloader version string is displayed. This will cause the bootloader to ignore the presence of
what it thinks is a valid application program in FLASH and force the bootloader to initiate the XMO-
DEM upload sequence. When you see the character ‘C’ being displayed every three seconds, you
may initiate the upload of a new application program file.