Intel® Quartus® Prime Standard Edition User Guide: Debug Tools

ID 683552
Date 9/24/2018
Document Table of Contents Using the Basic OR Trigger Condition with Nested Groups

When you specify a set of signals as a nested group (group of groups) with the Basic OR trigger type, Signal Tap Logic Analyzer generates an advanced trigger condition. This condition sorts signals within groups to minimize the need to recompile your design. As long as the parent-child relationships of nodes are kept constant, the advanced trigger condition does not change. You can modify the sibling relationships of nodes and not need to recompile your design.
The evaluation precedence of a nested trigger condition starts at the bottom-level with the leaf-groups. The Logic Analyzer uses the resulting logic value to compute the parent group’s logic value. If you manually set the value of a group, the logic value of the group's members doesn't influence the result of the group trigger. To create a nested trigger condition:
  1. Select Basic OR under Trigger Conditions.
  2. In the Setup tab, select several nodes. Include groups in your selection.
  3. Right-click the Setup tab and select Group.
  4. Select the nested group and right-click to set a group trigger condition that applies the reduction AND, OR, NAND, NOR, XOR, XNOR, or logical TRUE or FALSE.
    Note: You can only select OR and AND group trigger conditions for bottom-level groups (groups with no groups as children).
    Figure 55. Applying Trigger Condition to Nested Group