Interconnect delays are rounded to the time precision of the module that contains the annotated MIPD. The SDF value of 16ps is rounded to 20ps. 016 is annotated to a path delay in a module having a time precision of 10ps (from the timescale directive), then the path delay receives a value of 20ps. The filtered result shows a 1khz waveform with almost all of the 5khz signal removed. You should see the a 1khz wave with a 5khz signal as the input. Under properties in the waveform window, select Analog waveform (interpolated). For example, if the SDF TIMESCALE is 1ns and a value of. Input fir31.waveform (which has a 1khz and 5khz sinewave) as fir31.sample for your filter. of intermediate variables to the waveform diagram, data export, etc. The annotator rounds timing values from the SDF file to the time precision of the module that is annotated. Compared with the professional simulation software Modelsim, ISim is free and does. The SDF TIMESCALE construct specifies time units of values in the SDF file. $sdf_annotate system task$sdf_annotate (,, ,, ,, ) Ex $sdf_annotate("myasic.sdf", testbench.u1) $sdf_annotate("myasic.sdf", testbench.u1,, , "maximum") Close ModelSim and go back to the Quartus main window. Then, click OK in the Save Format dialog window to save the new wave format in the default directory or in the directory you would like to use by browsing to it. SDFSDF versions 1.0 through 4.0 vsim -sdfmin -sdftyp -sdfmax Ex vsim -sdfmax /testbench/u1=myasic.sdf testbench Or Simulate > Start Simulation > SDF wave.do to a name something like wavef.do for functional, or wavegl.do for gate level. NOTE: NO actual directories created in the file system.įile > Add to Project > Simulation Configuration.Īdd waveView wave Add wave * OR VIEW > DEBUG WINDOWS > WAVEĪdd CursorClick Rename Cursor2 to B Drag B to measure the Delta
Verilog can model: behavioral, RTL structure Module: basic unit in Verilog A tutorial: Module instantiation, stimulus, respone Procedure block: initial, always
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