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Mentor
Mentor
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Registered: ‎10-07-2011

FIR Compiler exhibiting undefined M_AXIS_TDATA

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Hi folks,

Using Vivado 2018.2 on Win10x64. My design is using the FIR compiler to create a low-pass filter.

  • Fclk = 150MHz
  • Fsample = 150kHz (hence 1000 clocks per sample)
  • 501 coefficients
  • Single-channel, single data rate

Simulation waveforms are shown below (both full and zoomed view). It is shown that AXIS_LPF_TDATA (which is the same as M_AXIS_TDATA) is always unknown (???) when TVALID is asserted.

FullView.pngZoomedView.png

Any idea of what may be wrong?

Cheers,

Claude

 

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Highlighted
Mentor
Mentor
290 Views
Registered: ‎10-07-2011

Found it! I reconfigured the core but the simulation tool was still pointing to the former MIF file. Pointing to the proper MIF file resolved the issue.

View solution in original post

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Highlighted
Mentor
Mentor
291 Views
Registered: ‎10-07-2011

Found it! I reconfigured the core but the simulation tool was still pointing to the former MIF file. Pointing to the proper MIF file resolved the issue.

View solution in original post

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