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  1. Thanks a lot Arthur, I am a beginner in Vivado so I didn't know about its simulation tool. I have now used it and solved most of the issues in the code and got the PMOD DA4 module to run correctly. I have attached the working file here in case someone else needs it. Thanks, Mohsen DA4_v11_working.vhd
  2. Hi, I have tried to create a VHDL code for the DA4; and I have followed all that has been discussed here. However, I don't get any analog signals on any output channel! Can someone please help with this? I have tried with both internal (x"08000001") and external (x"08000000") references. Thanks, Mohsen DA4_v9.vhd