Motorola MC3000 Spezifikationen PDF herunterladen (Seite 102)

6 - 18 MC3000 Integrator Guide

• Partition Table: Identifies where each partition is loaded in the mobile computer.

Downloading Partitions to the Mobile Computer

TCM is used to specify a hex destination file for each partition and download each file to the mobile computer. This

download requires a program loader stored on the mobile computer. The mobile computer comes with a program

loading utility, Initial Program Loader (IPL), stored in the mobile computer's write-protected flash.

IPL

IPL allows the user to upgrade the mobile computer with software updates and/or feature enhancements.

Partition Update vs. File Update

There are two types of updates supported by the mobile computer: partitions and files. The file system used by the

mobile computer is the same as the file system used on a desktop computer. A file is a unit of data that can be

accessed using a file name and a location in the file system. When a file is replaced, only the contents of the

previous file are erased. The operating system must be running for a file to be updated, so the IPL cannot perform

individual file updates as it is a stand-alone program that does not require the operating system to be running.

A typical partition is a group of files, combined into a single “partition” that represents a specific area of storage.

Examples of partitions are the flash file systems such as Platform or Application. (Using the desktop computer

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 mobile computer.

Upgrade Requirements

Upgrade requirements:

• The hex files to be downloaded (on development computer)

• A connection from the host computer and the mobile computer (either serial or wireless)

• TCM (on development computer) to download the files.

Once these requirements are satisfied, the mobile computer can be upgraded by invoking IPL and navigating the

menus. See Sending the Hex Image on page 6-7 for procedures on downloading a hex file to the mobile computer.

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Motorola MC3000 Spezifikationen Seite 102