Fast Models Reference Manual - ARM Information Center

Peripheral and Interface Components
The VFS device implementation consists of the following parts:
VFS LISA component
Coordinates device activity.
MessageBox component
Handles bus activity and interrupts. See MessageBox component on page 5-137.
MBoxTypes.h
VFS.cpp/h
Defines types shared between target and OS.
Implements the VFS class/function interface.
VFSFileSystem.cpp/h
Provides a host filesystem abstraction layer.
MessageCodec.h
Provides utility classes for packing and unpacking messages.
VFSOps.h
VFSTypes.h
Defines the VFS operations.
Defines types shared between target and OS.
To use the VFS component in a platform, add the vfs.sgrepo repository file to your project. You
must also add the path to the C++ header files in the VFS implementation parts list to your
project.
Figure 5-60 shows a view of the component in System Canvas.
This component is written in LISA+.
Figure 5-60 VFS2 in System Canvas
Ports
Table 5-111 provides a brief description of the VFS2 component ports.
Name Port protocol Type Description
Table 5-111 VFS2 ports
pvbus_s PVBus Slave Provides memory mapped access to the
VFS device.
intr Signal Master Optional interrupt line used to indicate
availability of incoming VFS data. If the
intr port is not used, MessageBox
registers can be used to poll for
incoming VFS data. See Table 5-115 on
page 5-139.
ARM DUI 0423J Copyright © 2008-2011 ARM. All rights reserved. 5-136
ID051811
Non-Confidential