Motorola MC21XX SERIES Especificaciones descargar pdf (Pagina 49)

Application Development 4 - 5

Bootloader

Bootloader allows the user to upgrade the MC21XX with software updates and/or feature enhancements.

Partition Update vs. File Update

There are two types of updates supported by the MC21XX: partitions and files. The file system used by the

MC21XX 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 Bootloader

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 Bootloader can perform partition updates.

All partition images suitable for use by Bootloader are in hex file format for transfer by USBDownloader from

the development computer to the MC21XX.

Upgrade Requirements

Upgrade requirements:

•

The hex files to be downloaded (on development computer)

•

A connection from the host computer and the MC21XX

•

USBDownload (on development computer) to download the files.

Once these requirements are satisfied, the MC21XX can be upgraded by invoking Bootloader and navigating

the menus. See Bootloader on page 4-9 for procedures on downloading a hex file to the MC21XX.

Deployment

This section provides information about installing software and files on the MC21XX.

Software deployment can be performed by:

•

Copying files from a host computer

•

Updating images.

Copying Files from a Host Computer

ActiveSync

To copy files from a host computer to the MC21XX:

1. Ensure that ActiveSync is installed on the host computer and that a partnership was created. For more

information see, Chapter 3, Synchronization.

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Motorola MC21XX SERIES Especificaciones Pagina 49