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

ID 683819
Date 10/02/2023

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3.7. Step 5: Run the Signal Tap Logic Analyzer

Debugging signals with the Signal Tap logic analyzer GUI is similar to debugging with an external logic analyzer. During normal device operation, you control the logic analyzer through the JTAG connection, specifying the start time for trigger conditions to begin capturing data.
Figure 74. Starting Signal Tap Analysis
  1. Select the Signal Tap instance, and then initialize the logic analyzer for that instance by clicking Processing > Run Analysis in the Signal Tap logic analyzer GUI.
  2. When a trigger event occurs, the logic analyzer stores the captured data in the FPGA device's memory buffer, and then transfers this data to the Signal Configuration pane Data tab. You can perform the equivalent of a force trigger instruction that allows you to view the captured data currently in the buffer without a trigger event occurring.

You can also use In-System Sources and Probes in conjunction with the Signal Tap logic analyzer to force trigger conditions. The In-System Sources and Probes feature allows you to drive and sample values on to selected signals over the JTAG chain.