Synplify pro vs vivado skin#
Synplify pro vs vivado plus#

There are lot of ways to skin the cat and it takes a while to get a feel for what works and what doesnвЂ™t for your design. I frankly would not be able to fit my design in the FPGA IвЂ™m targeting without these capabilities. To someone who has only been using the GUI up until now they are probably saying WTF!! Believe me, running the same commands again with different directives or after phys_opts can lead to significant improvements in timing. Phys_opt_design -directive AlternateReplication Phys_opt_design -directive AggressiveFanoutOpt Phys_opt_design -directive AggressiveExplore Also, and most importantly, you can run steps again iteratively to improve timing. However it turns out there are steps/directives that you can execute only in Non-Project Mode. Note that using the GUI or Project Mode TCL script you can essentially only run the following commands in this order вЂ“ So depending on your design different directives and combinations of directives will yield better results. I have found that setting -shreg_min_size to 5 instead of the default value of 3 helps my design.ДЇor the implementation related commands Vivado provides different directives that attack the problem differently.

Synplify pro vs vivado plus#

You may want to go over UG835 TCL Command Reference Guide and UG904 Vivado Implementation Guide to help you understand the commands and their various options.ДЇor synth_design there are a bunch of options like the ones you see in the GUI plus more. This should be pretty self explanatory even to users who have only built using the GUI. To run this build script run in a vivado tcl shell like this: $ vivado -mode tcl Write_bitstream -force my_proj/my_proj.bit Write_debug_probes -force my_proj/my_proj.ltx Synth_design -top top -part xcku060-ffva1517-2-i # Used when generating ip and executing synth, impl. # Assign part to in-memory project (will also create the in-memory project) The most simple Non-Project Mode TCL build script looks something like this: # filename: build.tcl

In Non-Project mode, an in-memory project is created to let the Vivado tools manage various properties of a design, but the project file is not written to disk, and the project status is not preserved. But if you want more customization and achieve maximumВ timing and area performanceВ you need to use Non-Project Mode flow to unlock all the capabilities Vivado offers. Project Mode is a more automated and guided flow and is great starting point for most designs. The GUI design flow uses Project Mode and you can also script in Project Mode using TCL commands. There are two modes to run the tools вЂ“ Project Mode and Non-Project Mode. However for compiling projectsВ I prefer to use a TCLВ based build script. VivadoвЂ™s GUI is okayВ and I use it a lot for analyzing my compiled designs at different stages. However, as with any powerful tool, there are many knobs that you can turn which can be dauntingВ to the average user. Vivado has been a huge improvement over ISE.