diff -r 578be2adaf3e -r 307f4279f433 Adaptation/GUID-2559E3F7-314B-5DCC-A7FE-A08162A89721.dita --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Adaptation/GUID-2559E3F7-314B-5DCC-A7FE-A08162A89721.dita Fri Oct 15 14:32:18 2010 +0100 @@ -0,0 +1,56 @@ + + + + + +Local +Media Subsystem OverviewProvides the logical device driver for the internal and removable +storage media on a phone. +
Purpose

The local media sub-system allows the Symbian +platform file system and other programs to communicate with local media devices.

+
Required background

The local media sub-system +requires an understanding of the Symbian platform file system and local media +devices.

+
Key concepts and terms
+ +
local drive
+

A media drive mounted within the phone.

+ +
+
Architecture

The TBusLocalDrive class +provides an interface to the local media sub-system. Each instance of this +class represents a channel of communication with a local drive. To establish +a channel a client connects an instance of the class to a specified drive. +The file server contains 16 instances of TBusLocalDrive, +one for each local drive. Programs other than the file server may also create +instances to access a local drive. Drives are abstracted by the TDrive class.

+
Local Media Sub-system Summary

The local media +subsystem provides the following:

    +

  • Local media LDD

    elocd.ldd

    The +kernel-side logical device driver which implements communication between physical +devices and applications which use them.

    • +
+
Typical uses

The TBusLocalDrive class +is used to connect to and disconnect from local drives, to read to and write +from them, to provide information about the capabilities of the drives, to +format them, and to mount and remount drives on specified media drivers.

Local +media subsystem:

    +

  • Manages device connections

    • +

  • Manages data transfer

    • +

  • Handles notifications +and device configuration.

    • +
+ + +File Server + +File Systems + +Media Drivers + \ No newline at end of file