VHDL Programming

The sample buffer contains as many samples as specified by the sample

depth in the instrumentor setup. In this case 256 samples were captured

into the sample buffer and sent to the debugger when the trigger occurred.

Trigger Position

The position of the trigger in the sample buffer data can be controlled so

that more history before the trigger is shown, history and future data size

are the same, or less history and more future data is shown after the

trigger. In this example the history and future data is the same, which

corresponds to the middle trigger position.

Waveform Display

Another way to view the sample buffer data is via a waveform display. In

Figure 18-11 the sample buffer data are shown as a waveform. The vertical

408 Chapter Eighteen

Figure 18-8
Signals and Break-
points Selected for
Debug.