Trigger settings tab

The Triggers tab controls the triggering for the display of new lines in the List window. You can specify whether an HDL item trigger or a strobe trigger is used to determine when the List window displays a new line. If you choose Trigger on: Signals, then you can choose between collapsed or expanded delta displays. You can also choose a combination of signal or strobe triggers. To use gating, Signals or Strobe or both must be selected.

The Triggers tab includes the following options:

• Deltas:Expand Deltas
  When selected with the Trigger on: Signals check box, displays a new line for each time step on which items change, including deltas within a single unit of time resolution.
• Deltas:Collapse Deltas
  Displays only the final value for each time unit.
• Deltas:No Deltas
  Hides simulation cycle (delta) column.
• Trigger On: Signal Change
  Triggers on signal changes. Defaults to all signals. Individual signals can be excluded from triggering by using the Prop > Signals Props dialog box or by originally adding them with the -notrigger option to the add list command.
• Trigger On: Strobe
  Triggers on the Strobe Period you specify; specify the first strobe with First Strobe at:.
• Trigger Gating: Use Gating Expression
  Enables triggers to be gated on (a value of 1) or off (a value of 0) by the specified Expression.
• Trigger Gating: Expression
  Enables triggers to be gated on and off by an overriding expression, much like a hardware signal analyzer might be set up to start recording data on a specified setup of address bits and clock edges. Affects the display of data, not the acquisition of the data.
• Use Expression Builder (button)
  Opens the Expression Builder to help you write a gating expression. See "The GUI Expression Builder"
• Expression
  Enter the expression for trigger gating into this field, or use the Expression Builder (select the Use Expression Builder button). The expression is evaluated when the List window would normally have displayed a row of data (given the trigger on signals and strobe settings above).
• Trigger Gating: On Duration
  The duration for gating to remain open after the last list row in which the expression evaluates to true; expressed in x number of default timescale units. Gating is levelsensitive rather than edge-triggered.

List window gating information is saved as configuration statements when the list format is saved. The gating portion of a configuration statement might look like this:

configure list config -usegating 1
configure list config -gateduration 100
configure list config -gateexpr {<expression>} 

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