Configuring the Eye Scan API

To debug link connections in your FlexRIO high-speed serial application, use the Eye Scan API located on the NI Eye Scan palette at FPGA Interface»Software-Designed Instrument»NI High-Speed Serial»NI Eye Scan.

The Eye Scan API offers two types of Eye Scan:
  • Rectangular Eye Scan obtains a traditional eye that sweeps the unit interval and nominal voltage.
  • N Point Eye Scan measures the Bit Error Ratio at arbitrary unit intervals and nominal voltage offsets.
    Note The Aurora Streaming example projects do not include an example of N Point Eye Scan. To use N Point Eye Scan, refer to the example in Programming Eye Scan to Debug Link Connections.

Connecting Signals to Enable Eye Scan

To use Eye Scan, you must connect the channel registers for your transceiver and FPGA type to the Instruction Framework. Connect these registers using the FXP32-Address, FXP32-Data version of AXI4-Lite.
Note Eye Scan requires access to the DRP signals on the FPGA primitives. Refer to the Aurora Streaming example projects for a demonstration of how to translate the AXI4-Lite signals to DRP signals within the CLIP.

Using the Create GTH AXI4-Lite VI

The following figure shows the Create GTH AXI4-Lite VI which is used in the Aurora Streaming example projects to specify the offsets for the DRP registers and to create an AXI4-Lite CLIP adapter using the specified CLIP resources. The Add Address Map Element VI registers the FPGA primitives at the appropriate offsets for easy reference on the host.
Note If your module uses GTY transceivers, use Create GTY AXI4-Lite.vi.
Figure 1. Create GTH AXI4-Lite VI

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Connecting CLIP Resources to the Instruction Framework

Refer to the following figures to connect the appropriate CLIP resources to the Instruction Framework using the Create GTH AXI4-Lite VI. For a more detailed demonstration, refer to the Aurora Streaming example projects in the FlexRIO with Integrated I/O Project Creator.
Note To register the DRP subsystems in the Create GTH AXI4-Lite VI with the Instruction Framework, call Add Subsystems.vi.
Figure 2. Figure 1

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Refer to the following figure for the AXI DRP Channel CLIP Resources.

Figure 3. Figure 2

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