描述

Why does my core fail timing with a critical warning?

Critical warning message - [Route 35-39] The design did not meet timing requirements. Please run report_timing_summary for detailed reports.

This affects the following Video IP:

• LogiCORE IP Chroma Resampler v3.01.a
• LogiCORE IP Color Correction Matrix v5.01.a
• LogiCORE IP Color Filter Array Interpolation v6.01.a
• LogiCORE IP Defective Pixel Correction v6.01.a
• LogiCORE IP Gamma Correction v6.01.a
• LogiCORE IP Image Edge Enhancement v5.01.a
• LogiCORE IP Image Noise Reduction v5.01.a
• LogiCORE IP Image Statistics v5.01.a
• LogiCORE IP RGB to YCrCb Color-Space Converter v6.01.a
• LogiCORE IP Video Deinterlacer v3.00.a
• LogiCORE IP Video Scaler v7.01.a
• LogiCORE IP Video Timing Controller v5.01.a
• LogiCORE IP YCrCb to RGB Color-Space Converter v6.01.a

解决方案

This usually happens because of the discrepancy between the clock speed of the AXI4-Lite interface, and the AXI4-Stream interface on the Video IP.

There is cross clock domain logic built into the cores, so these paths can be safely ignored using constraints. Example constraints have been put in the under the Constraints section of the Product Guides for the Video IP. Users of the Vivado 2013.2 tool should also see (Xilinx Answer 56724).
Starting with Vivado 2013.3, these constraints are provided in the XDC constraints file included with the core.

Following are links to the Video IP Product Guides:

• PG012 - LogiCORE IP Chroma Resampler v3.01.a
• PG001 - LogiCORE IP Color Correction Matrix v5.01.a
• PG002 - LogiCORE IP Color Filter Array Interpolation v6.01.a
• PG005 - LogiCORE IP Defective Pixel Correction v6.01.a
• PG004 - LogiCORE IP Gamma Correction v6.01.a
• PG003 - LogiCORE IP Image Edge Enhancement v5.01.a
• PG011 - LogiCORE IP Image Noise Reduction v5.01.a
• PG008 - LogiCORE IP Image Statistics v5.01.a
• PG013 - LogiCORE IP RGB to YCrCb Color-Space Converter v6.01.a
• PG017 - LogiCORE IP Video Deinterlacer v3.00.a
• PG009 - LogiCORE IP Video Scaler v7.01.a
• PG016 - LogiCORE IP Video Timing Controller v5.01.a
• PG014 - LogiCORE IP YCrCb to RGB Color-Space Converter v6.01.a

For a detailed list of:

LogiCORE IP Chroma Resampler Release Notes and Known Issues, see (Xilinx Answer 44487).
LogiCORE IP Color Correction Matrix Release Notes and Known Issues, see (Xilinx Answer 32132).
LogiCORE IP Color Filter Array Interpolation Release Notes and Known Issues, see (Xilinx Answer 32133).
LogiCORE IP Defective Pixel Correction Release Notes and Known Issues, see (Xilinx Answer 32134).
LogiCORE IP Gamma Correction Release Notes and Known Issues, see (Xilinx Answer 32135).
LogiCORE IP Image Edge Enhancement Release Notes and Known Issues, see (Xilinx Answer 33749).
LogiCORE IP Image Noise Reduction Release Notes and Known Issues, see (Xilinx Answer 33750)
LogiCORE IP Image Statistics Release Notes and Known Issues, see (Xilinx Answer 33748).
LogiCORE IP RGB to YCrCb Color-Space Converter Release Notes and Known Issues, see (Xilinx Answer 29982).
LogiCORE IP Video Deinterlacer Release Notes and Known Issues, see (Xilinx Answer 41969)
LogiCORE IP Video Scaler Release Notes and Known Issues, see (Xilinx Answer 31958).
LogiCORE IP Video Timing Controller Release Notes and Known Issues, see (Xilinx Answer 32754).
LogiCORE IP YCrCb to RGB Color-Space Converter Release Notes and Known Issues, see (Xilinx Answer 29980).

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