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VHDL vs. Verilog: Which one do you prefer and why?

rsjawale24

I started my FPGA journey with VHDL. Hence, I'm quite comfortable with VHDL. I tried learning Verilog, but it seems redundant to me as I already knew one HDL, so I gave up on learning Verilog.

However, while pursuing my master's, I saw that Verilog had become the most popular HDL and was being taught in my university and demanded in the industry.

I also find that many of the participants in the Spartan_Migration challenge are using Verilog.

Which HDL do you prefer and why? Have you tried learning VDHL or Verilog while you already knew one of them?

I like VHDL because it appears more structured and it was the first HDL I learned during my engineering days.

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  • I far prefer Verilog, mostly because it's more concise.  There's no way my Verilog code could fit in my binders if it were VHDL.  I'd have to get a larger office :-)

    Verilog is loosely based on C, so you have concise C notations.  I'm one of those who likes "if-then-else" expressions of the form "a? b: c".  I know some people hate that notation.  Chacun a son goût.

    VHDL is based on Ada.  I never got into Ada.  Some people love to type.  Chacun a son goût.

    My favorite commercial HDL was Altera HDL (AHDL).  You just described the hardware you wanted and "Bob's your uncle".  The problem with Verilog and VHDL (from my experience, now a few years out of date) is that you have to imagine the hardware you want, and then follow the correct template to cajole the FPGA compiler into synthesizing the correct hardware.  Verilog and VHDL were originally conceived for simulation.  Synthesis was added later, as an afterthought.  It shows.

    JMO/YMMV

  • in reply to johnbeetem

    Hey, I have an uncle called Bob too. Wink

    +1 for AHDL, I just loved the syntax. As you said, very descriptive. I only got to use it in University. 

    In real life, I only speak VHDL (the language of choice for everything defense). Also because all the companies only used Xilinx and Lattice and I could never convert any to Altera. I also use the legacy company names exclusively, because I believe the original companies, who started all the goodness shall not be forgotten. 

     = W.

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  • in reply to johnbeetem

    Hey, I have an uncle called Bob too. Wink

    +1 for AHDL, I just loved the syntax. As you said, very descriptive. I only got to use it in University. 

    In real life, I only speak VHDL (the language of choice for everything defense). Also because all the companies only used Xilinx and Lattice and I could never convert any to Altera. I also use the legacy company names exclusively, because I believe the original companies, who started all the goodness shall not be forgotten. 

     = W.

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