Intel® Quartus® Prime Standard Edition User Guide: Debug Tools

ID 683552
Date 9/24/2018
Document Table of Contents Analyzing Signal Probe Routing Failures

A Signal Probe compilation can fail for any of the following reasons:
  • Route unavailable—the Signal Probe compilation failed to find a route from the Signal Probe source to the Signal Probe pin because of routing congestion.
  • Invalid or nonexistent Signal Probe source—you entered a Signal Probe source that does not exist or is invalid.
  • Unusable output pin—the output pin selected is found to be unusable.

Routing failures can occur if the Signal Probe pin’s I/O standard conflicts with other I/O standards in the same I/O bank.

If routing congestion prevents a successful Signal Probe compilation, you can allow the compiler to modify routing to the specified Signal Probe source. On the Tools menu, click Signal Probe Pins and turn on Modify latest fitting results during Signal Probe compilation. This setting allows the Fitter to modify existing routing channels used by your design.

Note: Turning on Modify latest fitting results during Signal Probe compilation can change the performance of your design.