DAP Technology 1394, Operation Manual

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Custom Protocols
329 Copyright © DapTechnology B.V., 2005-2019 - All Rights Reserved., 5/20/2019
Chapter 19. Custom Protocols
Custom-made protocols are supported by the Protocol View of the Recorder. The protocol analyzer takes
into account the custom-made protocols for which protocol definitions are available. A protocol definition
lay down the behavior of a custom-made protocol. Protocol definitions are created with the Protocol
editor.
The protocol analyzer will scan through all transactions to find custom-made protocol compliant items and
it will fill the tab page related to the custom-made protocol in the 'relation' pane with these items, as
described in Protocol View and Protocol Settings. An example of the resulting Protocol View is displayed
below.
19.1. What is it
The custom protocol view displays the result in three different parts. At the right (transactions and
packets), all found resets and transactions are displayed in the order they were detected on the bus. The
left part (relations) shows the relation between these items. The transactions belonging to tree items are
displayed hierarchically in the 'relations' pane. At this moment only one to one relations will exists. The
spin-off effect of a write or read transaction is not supported by the protocol definition yet.
The details of the item selected in the relations tree, are displayed in the middle part of the Protocol View.
It displays the fields defined for the selected item and the values of those fields.
19.2. How to use it
To display the Custom-made protocol results, select the related tab page in the Protocol View of the
Recorder. The Protocol View can be displayed by selecting it in the 'View' menu of the Recorder.
IMPORTANT:
In order to select this view the protocol analyzer must take into account the protocol definitions of the
custom-made protocols. The location of the protocol definitions must therefore be specified in the Settings
dialog tab page 'Protocols'. The Settings dialog is opened by selecting it in the 'Windows' menu.
The protocol analyzer needs some information from the Configuration ROM of a device, which support
the custom-made protocol, to be able to analyze transactions corresponding to this device. There are two
ways the analyzer can get this information: automatically or manually.
Automatically finding custom-made protocol information
To make sure the protocol analyzer finds the custom-made protocol information automatically, you should
make sure that the Configuration-ROM is read. The Configuration-ROM information is normally read after
a bus reset. One way to do this is to (re)connect the device while the Recorder is recording data. You
should also take care that this recorded information is not removed from the recorder buffer because of
recorder-buffer overflow (cyclic recorder buffer). One way to do this is to stop the recorder before the
cyclic buffer (the buffer part before the trigger position) fills completely, or by generating a trigger before