Altera Video and Image Processing Suite - Manual (Page 263)

Note: System Console uses the sopcinfo file (written by Qsys) or the .sof (written by the Quartus II
software) to discover the connections between the trace system and the monitors. If you instantiate
and manually connect the trace system and the monitors using HDL, System Console will not
detect them.
Packet Visualization
System Console's Trace Table View contains a tabular view for displaying the information the monitors
send out.
You can inspect the details of a video packet when you select a row in the trace table. The table offers the
following detailed information:
• Statistics—Data flow statistics such as backpressure.
• Data—The sampled values for up to first 6 beats on the Avalon-ST data bus.
[n]
is the nth beat on the
bus.
• Video control—Information about Avalon-ST video control packet.
• Video data—Packet size, the number of beats of the packet.
Note: When you turn the pixel capture feature, the packet displays a sub-sampled version of the real-time
image packet in the video data section.
Table 21-1: Statistics
The table below lists the description of the available data flow statistics.
Statistics Description
Data transfer cycles (beats) The number of cycles transferring data.
Not ready and valid cycles (backpressure) The number of cycles between start of packet and end of
packet—the sink is not ready to receive data but the source
has data to send.
Ready and not valid cycles (sink waiting) The number of cycles between start of packet and end of
packet—the sink is ready to receive data but the source has
no data to send.
Not ready and not valid cycles The number of cycles between start of packet and end of
packet— the sink is not ready to receive data and the source
has no data to send.
Inter packet valid cycles (backpressure) The number of cycles before start of packet—the sink is not
ready to receive data but the source has data to send.
Inter packet ready cycles The number of cycles before start of packet—the sink is
ready to receive data but the source has no data to send.
Backpressure [(Not ready and valid cycles + Inter packet valid cycles) /
(Data transfer cycles + Not ready and valid cycles + Ready
and not valid cycles + Not ready and not valid cycles + Inter
packet valid cycles)] × 100
Note: Inter packet ready cycles are not included in the
packet duration. A packet begins when a source
is ready to send data.
21-2 Packet Visualization
UG-VIPSUITE
2015.05.04
Altera Corporation Avalon-ST Video Monitor IP Core
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