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???
11/13/06 00:16
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 		 #127837 - FPGA Editor
Responding to: ???'s previous message
Andy Peters said:
I'd rather simulate a design than spend hours in the lab with a 'scope and logic analyzer trying to figure out which buried internal signal (that I have to bring out to a port pin, which means modifying perhaps several layers of hierarchy) is failing. Xilinx ChipScope is nice, assuming you haven't used up all of the block RAMs in the device.

If you use Xilinx FPGAs, you can always open the .NCD file generated by PAR in FPGA Editor and add probes to the relevant signals instead of routing out signals to the top level. Basically probing allows you to view ANY internal signal (including Xilinx generated signals) without having to modify the VHDL at all. Of course, you have to have a logic analyzer handy.

List of 81 messages in thread
TopicAuthorDate
Getting Started With FPGAs            01/01/70 00:00      
   A Book            01/01/70 00:00      
   Proceed with caution!            01/01/70 00:00      
   This is quite a nice deveolpment board            01/01/70 00:00      
   I like this board            01/01/70 00:00      
      I\'ve got one of these and can\'t recommend it            01/01/70 00:00      
         What are you talking about            01/01/70 00:00      
            Let me explain ...            01/01/70 00:00      
   generaly speaking            01/01/70 00:00      
      Damn, Jez, you need a spell-checker!            01/01/70 00:00      
         HDL-based design needs TEST BENCHES            01/01/70 00:00      
            I use 'em all the time, but ...            01/01/70 00:00      
               If your design is so simple            01/01/70 00:00      
                  What\'s important is the entry effort            01/01/70 00:00      
                     I dunno where you get these ideas from Richard            01/01/70 00:00      
                        Can you say ModelSim?            01/01/70 00:00      
                     Wrong            01/01/70 00:00      
                        Well, the schematic needs a little work            01/01/70 00:00      
                           more work?            01/01/70 00:00      
                              a few points ...            01/01/70 00:00      
                           ...            01/01/70 00:00      
                     HDL vs Schematics, take 1E6            01/01/70 00:00      
                        Thta may be great comfort to you ...            01/01/70 00:00      
                           Schematics? You're kidding!            01/01/70 00:00      
                              No, nor is my customer.            01/01/70 00:00      
                              both are a 'representation of Boole'            01/01/70 00:00      
                                 Yep, you're right...            01/01/70 00:00      
                                    To Clarify            01/01/70 00:00      
                                       schematic as equivalence check            01/01/70 00:00      
                                          Manual verification impossible because ...            01/01/70 00:00      
                                             schematic verification            01/01/70 00:00      
                                       Some more clarification            01/01/70 00:00      
                                          hanging problem            01/01/70 00:00      
                                             so will your post be            01/01/70 00:00      
                                    it's not fear of the unknown, but fear of its cost            01/01/70 00:00      
                           Static Timing Analysis and those "young engineers"            01/01/70 00:00      
                              It's a sign of the times, I suppose            01/01/70 00:00      
                                 And times change            01/01/70 00:00      
                                 senior?            01/01/70 00:00      
                                    That's because you've been avoiding the subject            01/01/70 00:00      
            I agree entirely. test benches are a pain but            01/01/70 00:00      
   Update from the OP            01/01/70 00:00      
      It's true ... we see things differently            01/01/70 00:00      
      the first buuk for any such venture            01/01/70 00:00      
      FPGA boards and that Cypress book            01/01/70 00:00      
         This may answer your question(s)            01/01/70 00:00      
   some of the references in the fpga faq            01/01/70 00:00      
      Good attitude            01/01/70 00:00      
   Also remeber to look at webistes like www.xilinx.c            01/01/70 00:00      
   My recommendation and opinions            01/01/70 00:00      
      I would stay away from Virtex-II            01/01/70 00:00      
         If you're going to fiddle with the 805x core ...            01/01/70 00:00      
            Something about life-cycles            01/01/70 00:00      
               No doubt about it.            01/01/70 00:00      
                  useful work            01/01/70 00:00      
                     Well, I beg to differ.            01/01/70 00:00      
                        salient point            01/01/70 00:00      
                           There's an area where that's not necessarily true            01/01/70 00:00      
                           FPGA Editor            01/01/70 00:00      
            Not necessarily            01/01/70 00:00      
               It's still too costly            01/01/70 00:00      
   Thanks to all            01/01/70 00:00      
   Update #2 from the OP            01/01/70 00:00      
   A testbench is...            01/01/70 00:00      
      I C            01/01/70 00:00      
         test bench            01/01/70 00:00      
            Makes sense            01/01/70 00:00      
   Yeah but...            01/01/70 00:00      
   Tristate buffer with propagation delays            01/01/70 00:00      
   Schematics vs. HDL            01/01/70 00:00      
      In a nutshell            01/01/70 00:00      
         it\'s been a while            01/01/70 00:00      
      Yes, but ... and there's always a but ...            01/01/70 00:00      
   Yep you can its called gate level design            01/01/70 00:00      
   Its really nothing to do with showing off            01/01/70 00:00      
      did you paraphrase this?            01/01/70 00:00      
      Jez, It\'s not \"sea of gates\" design, you know ...            01/01/70 00:00      
         Richards, it is there philosophy            01/01/70 00:00      
         Viewlogic            01/01/70 00:00      
   it is true            01/01/70 00:00      
   Here you go Richard graphical design exploration            01/01/70 00:00      

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