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The needed minimum version is modelsim Modelsim 10.6d
Design simulation
Simulation
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There is one file per variant so for instance, the file to compile is stored in each release in the following path:
| Code Block |
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nxmapimpulse-<version_number>/share/modelsim/nxLibrary-<variant_name>.vhdp |
For instance, for NG-MEDIUM or NG-MEDIUM-EMBEDDED target, with nxmap 22.1.0.1 release, the path is:
| Code Block |
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nxmapimpulse-dbg-2223.13.0.12/share/modelsim/nxLibrary-Medium.vhdp |
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Only components and entities are declared in the clear part. Architecture models are private and encrypted so. |
Hereafter an example of TCL script to compile and simulate a design:
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#Compile nx file vlib nx vcom -work nx -2008 nxmapimpulse-dbg-2223.13.0.12/share/modelsim/nxLibrary-Medium.vhdp #Compile design file vlib work vcom -work work -2008 sub_module1.vhd vcom -work work -2008 sub_module2.vhd vcom -work work -2008 top.vhd #Compile testbench vcom -work work -2008 tb_top.vhd #Simulate vsim -t 1ps -lib work work.tb_top |
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For instance, the netlist can be generated after the final routing step like the following example:
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from nxmapnxpython import * #Project creation p=createProject('') p.setVariantName("NG-MEDIUM") p.setTopCellName("work", "top") p.addFile('work','sub_module1.vhd') p.addFile('work','sub_module2.vhd') p.addFile('work','top.vhd.vhd') #Project steps p.synthesize() p.place() p.route() p.save('top_routed.vhd') |
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#Compile nx file vlib nx vcom -work nx -2008 nxmapimpulse-dbg-2223.13.0.12/share/modelsim/nxLibrary-Medium.vhdp #Compile design file vlib work vcom -work work -2008 top_routed.vhd #Compile testbench vcom -work work -2008 tb_top.vhd #Simulate vsim -t 1ps -lib work work.tb_top |
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It can be useful in order to detect a timing violation in the design and it its consequence.
Netlist and SDF generation
In addition of the netlist, a Standard Delay Format (SDF) output file must be generated using NXmap tool in the NXmap Impulse flow as follows:
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p.save('<file_name>.sdf','<conditions>) |
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For instance, the netlist can be generated after the final routing step like the following example:
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from nxmapnxpython import * #Project creation p=createProject('') p.setVariantName("NG-MEDIUM") p.setTopCellName("work", "top") p.addFile('work','sub_module1.vhd') p.addFile('work','sub_module2.vhd') p.addFile('work','top.vhd.vhd') #Project steps p.synthesize() p.place() p.route() p.save('top_routed.vhd') p.save('top_routed.sdf','worstcase') |
A SDF file described describes each path with a minimum, a maximum and an optional typical delay time.
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NanoXplore SDF file contain contains only minimum and maximum values so only -sdfmin and -sdfmax arguments are allowed. |
Simulation
Instead of the modelsim file, the backannoted file must be compileCompiling an SDF file is necessary in order to proceed to a backannoted simulation.
There is one file per variant so for instance, the file to compile is stored in each release in the following path:
| Code Block |
|---|
nxmapimpulse-<version_number>/share/modelsim/nxLibrary-<variant_name>.vhdp |
For instance, for NG-MEDIUM or and NG-MEDIUM-EMBEDDED target, with nxmap 22Impulse 23.13.0.1 2 release, the path is:
| Code Block |
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nxmapimpulse-dbg-2223.13.0.12/share/backannoted/nxLibrary-Medium.vhdp |
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#Compile nx file vlib nx vcom -work nx -2008 nxmapimpulse-dbg-2223.13.0.12/share/backannoted/nxLibrary-Medium.vhdp #Compile design file vlib work vcom -work work -2008 top_routed.vhd #Compile testbench vcom -work work -2008 tb_top.vhd #Simulate vsim +nowarn8888 -t 1ps -lib work work.tb_top -sdfmax sim/:tb_top:i_top_0=top_routed.sdf |
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+nowarn8888 argument is used in order to remove all warning warnings related to negative timing delay.
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