CrossLink-NX PCIe Bridge Board Basic Demo
User Guide
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FPGA-UG-02145-1.0
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5.3.
Running PCIe Basic Demo
The Segment Display tab shows the contents of the 7-Segment Control page. In this page, you will be running a
demonstration LED sequence and controlling the display on your board from the application. The Segment Display page
provides a way to interactively toggle segments on the display. You can present character sequences from this page or
select single characters and run them to light the display.
The states of the LED segments are converted to an 8-bit word value (each segment is controlled by a bit) and written
to the LED control register in the FPGA. This demonstrates a memory write across the PCI Express bus.
Figure 5.3. Three 7-Segment Display on Board
Figure 5.4. Interactive 7 Segment Display Tab
Click on any segment in the interactive segment display in the 7 Segment Control page. Notice that any selection
immediately causes the corresponding segment on the LED to light on your board’s LED display. Clicking on a segment
turns it on or off.
Clicking the Reset button turns off all segments of the LED display.
Enter a character between 0 and F and click on the Set button. This toggles on the respective segments both on the
board and in the user interface.
