DAP Technology 1394, Руководство по эксплуатации

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Industrial / Instrumentation Digital Camera protocol (IIDC)
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Enable IIDC analysis
Check this box to enable the IIDC analyzer. All protocol tabs in this dialog have such a checkbox, which
can be useful if a recording contains data from several protocols, and you're not interested in some of
these.
Units
In the Units table, one or more IIDC Units can be specified. The information in this table normally can be
found in the Configuration ROM of the IIDC node. It consists of:
·
Unit: Using the checkbox before each Unit in the table you can enable or disable each Unit individually
for analysis. If the box is not checked, the IIDC-related transactions and packets for this Unit will be
skipped.
· Node Spec.: A Unit is part of a node. As explained before, nodes are specified using Node
Specifications. The number in this column corresponds to the Node Specification numbers of the table
in the upper part of the dialog.
·
Base CMD register: This is the base command register specified as an offset from the IIDC start
address defined as Bus_ID, Node_ID , FFFF Fxxx xxxx. Normally, this is read from the Configuration
ROM in which case the default value '(detect)' from the combo box can be used. If this information is
missing the protocol analyzer can't do much, so it will need to be entered manually.
Extra IIDC settings
Most information the analyzer needs can be retrieved from the recorded packets. In some cases it might
be necessary to manually specify certain values for an IIDC unit. The settings dialog shows the extra
values for the selected unit in a group box that is labeled 'Selected unit'. The following values can be
specified in that table:
· ISO Channel: Indicates the ISO Channel used by the unit to transmit video frame data. A value can be
supplied here in case a recording has been made not containing the information (write of register 'ISO').
If a value is supplied the analyzer assumes video frame data is already transmitting on the indicated
channel at the start of the recording. The analyzer will probably also need to know something about the
mode and format of this data, so the next four options allow manual specifications of this as well.
· Video mode: Indicates the video mode used for the video frame-data transmitted. Selecting an option
here determines which options are allowed and displayed for the next two values 'Video format' and
'Video frame rate'.
·
Video format: Indicates the video format used for the video frame-data transmitted. The combo box will
only show allowed values for the above selected 'Video mode'. Selecting an option here determines
which options are allowed and displayed for the next value 'Video frame rate'.
·
Video frame rate: Indicates the frame rate used for the video frame-data transmitted. The combo box
will only show allowed values for the combination of the above selected value for 'Video mode' and
'Video format'. If all these 3 values have been entered, the next option ' Video frame size' will show the
size of a single video frame packet.
· Video frame size: This displays the frame size (1394 bus packet size excluding header) for the video
frame-data transmitted. It is fully determined by the choices made for the values of 'Video mode', 'Video
format' and 'Video frame rate' described above. As an alternative to selecting values for these three
options, it's sometimes easier to use this combo box to select the right value from all possible frame
sizes. The combo box will show a list of all frame sizes including the mode and format that are possible
taking into consideration the choices already made for 'Video mode', 'Video format' and 'Video frame
rate'. So if all these three values are set to '(detect)', this combo box will show all possible packet sizes.
If only a 'Video mode' has been selected, all possible frame sizes for any format and frame-rate
combination for the selected video mode will be shown. If a value is chosen in this combo box, 'Video
mode', 'Video format' and 'Video frame rate' will be updated to reflect that choice.
· Adv. feature base: The IIDC-protocol analyzer monitors reads of the register containing the base
address of the advanced-feature registers. If a recording does not contain reads of that base address
register, this option can be used to specify the base address of the advanced-feature registers, once
known the analyzer can detect and display reads and writes of the advanced-feature registers.
·
Adv. feature length: Given a base address offset of the advanced-feature registers, the IIDC-protocol
analyzer needs to know the size of the area of these registers. Since this value is not specified in the
standard nor can be found monitoring reads of an IIDC unit, it needs to be specified manually. This
option can be used to change the range of registers monitored once a base address of the
advanced-feature registers is known. A default value of 0x10000 will be used.