Hi friends i am trying to run my post synthesis simulation using modelsim, xilinx has generated the. Synopsys enhances synplify fpga synthesis software with up to. Learn more getting wrong results in post synthesis simulation. The dft insertion will be checked by the fact you are able to generate the patterns and able to simulate them. Post synthesis simulation uses the hardware model for the given temperature, core voltage, speed grade etc.
It will also be immediately obvious from the postsynthesis simulation results and will appear as a nonfunctional state machine the fsm will not advance between states. Simulation is the process of verifying the functionality and timing of a design against its original specifications. The outfit was initially established as optimal solutions with a charter to develop and market synthesis technology developed by the team at general electric. Remove the default input file, and select your testbench as an input file by clicking at the button close to the cross sign marked by a dot. Performing a post synthesis simulation with the rivierapro software. Synthesis user guide ug018 this user guide describes how to use synplify pro from synopsys to synthesize a design and generate a netlist for implementation in achronix devices. Synplify pro fpga logic synthesis software is the industry standard for producing highperformance and costeffective fpga designs. Timing simualtion is a simulation using timing information. Enhance post implementation debugging by using the eco flow to replace debug probes. Postsynthesis is the simulation performed after synthesis. Purpose the purpose of this laboratory is to provide you with. Postsynthesis simulation of all state machines in the design will detect the fault, if it is present.
Rtl modeling with systemverilog for simulation and synthesis using systemverilog for asic and fpga design stuart sutherland download bok. But i have diffculty trying to understand how to initialize the design since all my initial blocks used are non synthesizable are connected to some constants. Post synthesis and post implementation timing simulations are not supported for vhdl in vivado. Typically, you use this netlist for gatelevel simulation, to verify your synthesis results. Performing a postsynthesis simulation with the rivierapro software. When i simulate using msim i see the outputs as unknown value from only the modules having coregenerator instances. If you do not intend to run postsynthesis simulation, you can turn off the generation of the postsynthesis hdl netlist by rightclicking the configure design flow button on the libero design flow window. Synthesis and simulation design guide overview the synthesis and simulation design guide provides a general overview of designing field programmable gate array fpga devices using a hardware description language hdl. After synthesis, gate level simulation is performed on the netlist generated by synthesis. The post synthesis simulation is showing some unexpected res.
The synplify pro and synplify premier fpga design tools provide additional value by offering links to highperformance functional verification with vcs simulation and integration with synphony model compiler for highlevel synthesis of signal processing hardware. Fpga design tools from achronix achronix semiconductor corp. Synthesis can be done either by using xilinx xst or synplify premier dp. Just as simulation process is based on discrete event simulation, synthesis process from vhdl model is based on the process of inference.
My design flow requires both post synthesis and post implementation timing simulations to be run as part of our verification process. The netlist contains more of the information regarding the silicon resources i. The synthesis software does not insert bypass logic around the ram that read and write to the same address simult aneously. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. The quartus prime pro edition development software provides a complete design environment for systemonaprogrammablechip sopc design. Synplify pro fpga synthesis software is the industry standard for producing highperformance and costeffective fpga designs. Rtl modeling with systemverilog for simulation and synthesis. Fsms generated by hand or by software other than version 8. Synthesis compilers must infer typical hardware components and their interconnection from the vhdl code. Postsynthesis and postimplementation timing simulations are supported for verilog only. With larger designs, more thirdparty ip, globallydistributed design teams, and increasing performance and power.
Tutorial on fpga design flow based on aldec activehdl. Simulating a design with xilinx libraries unisim, unimacro, xilinxcorelib, simprims, secureip this application note provides a quick overview of xilinxtargeted simulation flow based on aldecs design and verification environments, activehdl or rivierapro. Postsynthesis simulation and onespin formal equivalency check results showed an incorrect value on a sum register. Activehdl for postsynthesis simulation and by xilinx ise for. After this i synthesized the design using xst tool in xilinx ise. Vhdlpld design flow synthesis and post synthesis simulation this laboratory is to be performed the week starting feb. This can be done in rtl using after clause for example or in behavioral using wait statements. There is a new vhdl file created from your netlist, comprising all rtl technology elements. Example of performing a timing simulation of a synplify verilog hdl design with a custom megafunction variation with the modelsim software. The fault condition, if present, will appear in the netlist produced by synplify. Presynthesis and postsynthesis simulation not matched. Postsynthesis simulation, quartus and modelsimaltera. Is synplify pro synthesis tool supported in all the libero licenses. Precision 2006a can be downloaded from actels website.
Synplify premiers fast logic synthesis mode now offers up to a 4x speed improvement over traditional logic synthesis when using a single processor. Rtl modeling with systemverilog for simulation and. Synopsys synplify pro me free version download for pc. Fpga design flow aldec rev 3 george mason university. Avoid using constants etc defined in the package file in your testbenches when simulating post synthesis or post implementation design. The simulation wizard has been enhanced to parse for the simulation top and to pass this information and other options directly to a simulator. The solution offers simulator like visibility into the implemented fpga hardware and. I have a vhdl only vivado project and only have a vhdl simulator license for. Postsynthesis simulation runs the netlist version of the design. For the post synthesis simulation we need to use the vhdl netlist model of the from ese 382 at stony brook university. Synplify pro ae is needed for synthesis and modelsim pese full feature version from mentor is needed to run simulation on a mixed hdl design. It will also be immediately obvious from the post synthesis simulation results and will appear as a nonfunctional state machine the fsm will not advance between states or fsm signals will be missing.
Synplify creates an edif netlist but modelsim uses the designer exported hdl netlist. The synplify synthesis tools provide fast runtime, performance, area optimization for cost and power reduction, multifpga vendor support, incremental and teamdesign capabilities for faster fpga design development. Post synthesis simulation and onespin formal equivalency check results showed an incorrect value on a sum register. The quartus version list is available only after selecting an altera device. For the post synthesis simulation we need to use the vhdl. Click at the options button next to the postsynthesis simulation icon. Hi, i was trying my hand at running a post synthesis simulation of one of my designs. Getting wrong results in post synthesis simulation. The other option is to generate the simulation scripts only by selecting the generate scripts only option in the simulation settings. Introduction to fpga synthesis tools linkedin slideshare. The following links also provide good information using ncverilog tools for postsynthesis simulation. If you use any other version of the software, results may not exactly match the results in the tutorial, although you can still follow the general methodology described in this document. When a rom block is inferred from an hdl design, the synplify software.
Professional services strategy and programs that address security before, during and after development. Normally the functionality equivalency will be covered by a lec tool. Critical path resynthesis increases the performance of the device. Maybe the hdlanalysist from synplify pro can give you a hint technology view.
Mismatch between rtllevel simulation and postsynthesis. Regardless of whether you use a personal computer or a linux workstation, the quartus prime pro edition software ensures easy design entry, fast processing, and straightforward device programming. While designing piso parallel in serial out in xilinx vivado using verilog, the output waveform of the behavioral simulation rtllevel, presynthesis shows correct desired output value but postsynthesis or postimplementation functional or timing. Post synthesis simulation of all state machines in the design will detect the fault, if it is present. Performing a gatelevel simulation with the rivierapro software. Synopsys synplify pro me is a synthesis tool integrated into libero soc and libero ide, enabling you to target and fully optimize your hdl design for any microsemi device. Use a init value other than 0 on c1 to see if you can find it in the synthesys result. This is a great debugging aid, especially when writing timing constraints. Xilinx synthesis and simulation design guide mafiadoc. Products include logic synthesis, behavioral synthesis, place and route, static timing analysis, formal verification, hardware description language systemc, systemverilogverilog, vhdl. Ace works in conjunction with thirdparty synthesis and simulation tools to provide a complete design environment for achronix fpgas. There is a note in ug900, logic simulation user guide outlining this.
The new compile point technology enables additional speed improvements with automatic parallel timingdriven synthesis execution on different portions of a design to take advantage of computers. The synplify premier softwares graphbased physical synthesis technology addresses timing closure by generating timing estimates that are tightly matched to postplaceandroute results. Take designs created from lab 1, lab 2, lab 3, and lab 4 and load them onto the kc705 board. Performing a functional simulation with the vcs mx software. Lattice diamond software includes changes to projects that support multifile simulation testbenches and allow different models for simulation or synthesis for a single module. Synplify synthesis techniques with the quartus ii software online training. Synopsys synplicity business group announces new products. Synplify premier is the industrys most advanced fpga design and debug environment.
Synplicity fpga synthesis synplify, synplify pro, synplify premier, and synplify premier with design planner user guide december 2005 synplicity, inc. The read write check on ram option on the device panel lets the synthesis tool insert bypass logic around the ram to prevent a simulation mismatch between the rtl and post synthesis simulations. If you do not intend to run post synthesis simulation, you can turn off the generation of the post synthesis hdl netlist by rightclicking the configure design flow button on the libero design flow window. Why has my logic block disappeared after synthesis. Inference is followed by optimization to reduce the size or increase the speed of of the. Frequently asked questions synplify synthesis microsemi. There is no impact on the file content but there is a runtime penalty. Click at the options button next to the post synthesis simulation icon. Post synthesis and post implementation timing simulations are supported for verilog only. Once done, choose the appropriate toplevel unit, which is. The software also supports fpga architectures from a variety of fpga vendors, including altera, achronix. I have written a verilog code and rtl simulation is working fine. Hello, in verilog code, i am doing the pre synthesis simulation correctly for the attached attachment text.
Performing a functional simulation with the rivierapro software. The following links also provide good information using ncverilog tools for post synthesis simulation. Synopsys enhances synplify fpga synthesis software with up. Please search for this file and post its entity definition, so we. The synplify premier toolset automates many functions for fpga synthesis so designers. Postsynthesis simulation uses the hardware model for the given temperature, core voltage, speed grade etc. The code is as below it is simulating properly but the post synthesis results are not right can anyone. Performing a timing simulation with the questasim software. Integrated module generation and mapping scope multilevel design constraints languagesensitive editor. Synplify software supports the latest vhdl and verilog language constructs including systemverilog and vhdl2008.
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