User guide

Chapter 7: Avalon-ST Video Monitor MegaCore Function 7–3
Parameter Settings
January 2013 Altera Corporation Video and Image Processing Suite
User Guide
Monitor Settings
The capture settings panel of the trace table allows convenient access to the settings of
the monitor. You can also change the monitor settings with the
trace_write_monitor
and trace_read_monitor TCL commands. At the hardware level, you can access the
register map through the
control Avalon-MM slave port of the monitor component.
Selecting the Enable settings available in the capture setting panel enables the
sending of statistics and sampled data. If you do not select, the monitor is disabled.
Parameter Settings
Table 7–2 lists the Avalon-ST Video Monitor MegaCore function parameters.
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
Inter packet ready cycles are not included in the packet duration. A
packet begins when a source is ready to send data.
Utilization
[Data transfer 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
Inter packet ready cycles are not included in the packet duration. A
packet begins when a source is ready to send data.
Table 7–1. Statistics
Statistic Description
Table 7–2. Avalon-ST Video Monitor Parameter Settings
Parameter Value Description
Bits per pixel per
color plane
4–20,
Default = 8
Choose the number of bits per pixel (per color plane).
Number of color
plane in parallel
1–3,
Default = 3
Choose the number of color planes that are sent in sequence over one data
connection. For example, you set a value of 3 for R’G’B’R’G’B’R’G’B’.
Number of color
planes in
sequence
1–3,
Default = 1
Choose the number of color planes in parallel.
Bit width of
capture
interface(s)
8, 16, 32, 64, or 128,
Default = 32
Choose the data bus width of the Avalon-ST interface sending the captured
information.