User's Manual

Table Of Contents

CATC MERLIN MOBILE 1.00 CHAPTER 7

User’s Manual Decoding Trace Data

DRAFT

7.3.1 L2CAP Channel Decoding Assignments

The L2CAP Channel Decoding Assignments dialog and the Assigned to pop-up menu are

used to manually configure L2CAP channel assignments (CIDs) for decoding L2CAP

messages.

Manual assignments are saved with the Trace, so they will be used the next time the Trace

is opened and L2CAP messages are decoded.

L2CAP Channel Decoding Assignments dialog

This dialog shows the current L2CAP channel assignments for the active Trace file, and also

provides a way to configure unassigned and manually assigned channels. Note that the list

will not display data for L2CAP messages with CIDs from 0x000-0x003F.

The columns of data in the list contain this information:

• From message #: The L2CAP message # for each master or slave transmission in the

Trace that first uses the particular CID.

• AmAddr: The Active Member Address (AM_ADDR) for the device.

• master or slave: The device role.

• CID = #: The channel identifier (CID).

• Protocol name: The protocol currently assigned for the channel. ‘- ??? -’ indicates that

the channel is unassigned.

To access the dialog and configure channel assignments:

Step 1 Decode L2CAP messages in a Trace by selecting View > Levels > L2CAP

Message Level from the menu bar, or by pressing the L2CAP button on the

toolbar.

L2CAP messages will be decoded by Merlin Mobile.

Step 2 Open the L2CAP Channel Decoding Assignments dialog by selecting View

> Decoding assignments from the menu bar, or by right-clicking anywhere

in the Trace and selecting Decoding assignments from the Trace View

pop-up menu.

The dialog will open.

Step 3 To find out whether a channel assignment was taken from the recording,

manually assigned, or is unassigned, click on the row in the list. The

assignment source will be shown in the Assignment Info area below the list.

Manually assigned and unassigned channels can be configured by the user.

Note: To change an assignment that was taken from the data in the recording, use

the Assigned to menu, which is described below.

Step 4 Change channel assignments by selecting the assignment in the list, then

clicking one of the protocol buttons on the right side of the dialog OR

selecting a protocol from the File Base Assignments drop-down list and

clicking the Set button.