Timing failure in dbg_hug after enabling DDRA in cl_hello_world_ref_hlx ex

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Seeing a intra-clock timing violation between clocks "rdck" and "tck" (both associated by dbg_hub) after enabling DDRA and connecting a CDMA IP to it.

Notes:

  1. dbg_hub is automatically added by vivado.
  2. Getting Critical Warnings when vivado processes file "cl_debug_bridge_hlx.xdc"
  3. Added false clock path between drck and tck to "cl_synth_user.xdc" has no effect.
  4. Using Vivado 2020.1 and Shell shell_v04261818

I realize that by adding DDRA, I am adding debug that comes with the DDR PHY so my guess is there is an issue with the constraints in file "cl_debug_bridge_hlx.xdc"???

Has anyone ever run into this ?

Thanks
Brian

asked 3 years ago210 views
2 Answers
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Hi Brian, I believe the example design you started with comes with a debug core (ILA) and a pre-marked debug signal, but shouldn't be necessary if you don't plan on debugging any signals. Are you marking any nets for debug in IPI or do you intend to debug these signals and need the debug hub?

answered 3 years ago
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Thanks, that fixed the issue.

answered 3 years ago

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