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Application Development and Deployment 7 - 5
comparison, these partitions are roughly equivalent to a C: or D: hard disk drive.) In addition to the “hard disk”
partitions, some partitions are used for single items such as the operating system, monitor, or splash screen.
(Again using a desktop computer comparison, these partitions are roughly the equivalent of the BIOS or
special hidden system files.) When a partition is updated, all data that was previously in its storage region is
erased - i.e. it is not a merge but rather a replacement operation. Typically, the operating system is not running
when partitions are update, so IPL can perform partition updates.
Partition images for selected partitions can be created by TCM. All partition images suitable for use by IPL are
in hex file format for transfer by TCM from the development computer to the vehicle computer.
Upgrade requirements:
•
The hex files to be downloaded (on development computer)
•
A connection from the host computer and the vehicle computer (either serial or wireless)
•
TCM (on development computer) to download the files.
Once these requirements are satisfied, the vehicle computer can be upgraded by invoking IPL and navigating
the menus. See Sending the Hex Image on page 7-11 for procedures on downloading a hex file to the vehicle
computer.