Open Trace Summary Using Time Window - 2025.2 English - UG1702

To open the VCD Trace Summary view, use the time window selection utility provided in the Vitis Analysis view. If you need to generate the full trace VCD, but would like to debug and analyze waveform for a dedicated time window, the vcdanalyze utility can process the specific part of the VCD based on the user input. Upon running AI Engine simulator with VCD enabled, open the trace view as follows:

Open the run summary using vitis_analyzer command or upload the AI Engine run summary: vitis_analyzer <default.aierun_summary>

Figure 1. Open Trace Summary Using Time Window

Upon opening the summary and clicking on the Trace view, the time window appears to make a selection and specify start time and the end time. By default, full VCD trace time line can be seen in the Analysis view.

• To go with the default, click OK and proceed. This runs vcdanalyze that processes full VCD and displays the trace waveform.
  Figure 2. VCD Analyze
  
  
  
• To get the desired trace for a particular time duration, select "SET A TIME WINDOW", specify "Start Time " and "End Time" to proceed. This runs vcdanalyze to process a part of the VCD based on the time window specified and then display the trace waveform.
  Figure 3. Process Waveform Data
  
  

  This results in the trace waveform display from 800 ns to 2000 ns.

  Figure 4. Wavefrom Display from 800 ns to 2000 ns