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Using the Details Pane Chapter 14, Using the Secondary Panes in Xgig TraceView
Xgig Analyzer User’s Guide 327
•
Display Bit-Swapped Fields (Binary)
: All the fields in the 66 bit transmission words are
bit-swapped before being presented to the user. The 66 bits are represented in binary mode
by 66 bits, where the first 2 bits are the Sync bits.
• Display In Transmission Order (Hex) : The 66 bits are presented in the order they were
captured on the wire without being bit-swapped. The 66 bits are represented by 17
hexadecimal digits where the first digit represents the 2 Sync bits.
•
Display In Transmission Order (Binary)
: The 66 bits are presented in the order they
were captured on the wire without being bit-swapped. The 66 bits are represented in
binary mode by 66 bits, where the first 2 bits are the Sync bits.
The Interpretation column decodes each field of the 66 bits according to the spec. If a field
contains a value that is invalid according to the specification, it is marked with (Unexpected Value
Found). For example, if a Control field has the value 0x7C, it is decoded as follows:
Control = 0x7C (Unexpected Value Found);
This way, the user can find which specific field of a 66-bit event made the hardware mark it with
an error. This is especially important for the “Control” field which can be found up to 8 times in a
66-bit event, the decodes tells you which occurrence of the Control field triggered the “Control
Char Error” as generated by the Xgig hardware.
Since every line in TraceView's grid displays one 32-bit word, or multiple 32-bit words. 66B
events map to two 32-bit words.
Inspector
view displays the full 66B event on the line of the first
corresponding 32-bit, and a text message on the next line telling the user to look at the previous
line for the full 66B event. So, for a BB_SCr-Idle 66B transmission word, TraceView displays the
full 66B transmission word in the Inspector window 66B tab for the BB_SCr line. Then, for the
Idle line, the
Inspector
view’s 66B column tells the user that this DWORD is the second half of a
transmission word, look at the previous line the full 66B transmission word.
For frames,
Inspector
view’s 66B column displays all the 66B words that are part of the frame. If
the frame is truncated, it displays how many transmission words have been truncated. Misaligned
truncation points are re-aligned by truncating the frames at the 66B transmission word boundaries.
The 66B tab also handles rep-counted primitives. The Interpretation column lists how many
primitives have been rep-counted in the Transmission Word.
When a filter is applied on a capture, the 2nd half of a transmission word can be missing. In that
case, the 66B displays a message to that effect, and it omits displaying the full 66B transmission
word. The same issue can happen at the end of a trace where the second half of a transmission
word is not captured.
The Errors column displays the full list of all the errors detected for the 66B events.
The Control/Data Characters column displays the 64B form with comma characters, as visible in
the Events view Side A/B columns.
The Inspector View’s
General
and
Tree
tabs show the 64-bit form with comma characters in the
Interpretation column. The Hex column shows the hexadecimal representation of the 64 bits.