Xilinx PCI v3.0 manual Implementing a Design

Models: PCI v3.0

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Chapter 6: Implementing a Design

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Chapter 6: Implementing a Design

The par command, as provided in the script, uses a guide file in exact guide mode. Note that some designs do not require the use of guide files.

To target a different device or to use a different version of the PCI interface, see Chapter 3, “Family Specific Considerations.”

If a guide file is required, ensure that the correct guide file is used by editing the script and changing the file name. If a guide file is not required, remove the following input arguments from the par command line in the script:

-gm exact -gf ../../src/guide/guidefile.ncd

If a guide file is required, the guide file must always be used. The effort levels and delay cleanup iterations may be adjusted if necessary.

The trce command performs a static timing analysis based on the design constraints originally specified in the user constraints file.

The netgen command generates a simulation model of the placed and routed design.

3.Implement the design by running the appropriate script.

During initial processing trials, it is useful to enter commands one at a time from the command line rather than running the script so that you can inspect the output of each step.

If the use of a guide file is required, it is important to verify that the guiding process was successful. This may be done by inspecting the pcim_top_routed.grf file. The remainder of this section is specific to designs requiring the use of guide files.

The number of pre-routed connections should exactly match the number listed in the selection table, shown in Table 3-1, page 19. The number of unrouted signals varies depending on the size of the user application. If the number does not match, the guide process has failed. This can occur for several reasons. First, check that the correct user constraints and guide files have been used. Second, verify that the user application observes all signal-driving rules defined in the PCI User Guide.

Note: Do not attempt re-entrant routing on a guided design. Re-entrant routing must not be used as it may re-route nets that were initially guided by the guide file.

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PCI v3.0.151 Getting Started Guide

 

 

UG157 August 31, 2005

Page 54
Image 54
Xilinx PCI v3.0 manual Implementing a Design