Tsim Create a File for Timing Simulation, Testclk.prj

XFLOW Flow Types

If you have multiple VHDL files, you must list all the source files in a text file, one per line and pass that information to XFLOW using the –g (Specify a Global Variable) option. Assume that the file that lists all source files is filelist.txt and design_name.vhd is the top level design. Use the following example:

xflow -p xc2v250fg256-5 -g srclist:filelist.txt -synth synplicity_vhdl.opt design_name.vhd

The same rule applies for Verilog too.

The following example shows how to use a combination of flow types to synthesize and implement a design:

xflow -p xc2v250fg256-5-synth xst_vhdl.opt -implement balanced.opt testclk.prj

Option Files for -synth Flow Types

Xilinx provides the following option files for use with the –synth flow type. These files allow you to optimize your design based on different parameters.

Table 23-12:Option Files for –synth Flow Type

	Option File	Description

	xst_vhdl.opt	Optimizes a VHDL source file for
	leonardospectrum_vhdl.opt	speed, which reduces the number of
	leonardospectrum_vhdl.opt	logic levels and increases the speed of
	synplicity_vhdl.opt	logic levels and increases the speed of
	synplicity_vhdl.opt	the design
		the design

	xst_verilog.opt	Optimizes a Verilog source file for
	leonardospectrum_verilog.opt	speed, which reduces the number of
	leonardospectrum_verilog.opt	logic levels and increases the speed of
	synplicity_verilog.opt	logic levels and increases the speed of
	synplicity_verilog.opt	the design
		the design

	xst_mixed.opt	Optimizes a mixed level VHDL and
		Verilog source file for speed, which
		reduces the number of logic levels and
		increases the speed of the design.

The following example shows how to use a combination of flow types to synthesize and implement a design:

xflow –p xc2v250fg256-5 –synth xst_vhdl.opt -implement balanced.opt

testclk.prj

–tsim (Create a File for Timing Simulation)

–tsimoption_file

This flow type generates a file that can be used for timing simulation of an FPGA or CPLD design. It invokes the fpga.flw or cpld.flw flow file, depending on your target device. For FPGAs, it runs NetGen. For CPLDs, it runs TSim and NetGen. This creates a time_sim.v or time_sim.vhdl file that contains a netlist description of your design in terms of Xilinx simulation primitives. You can use the output timing simulation file to perform a back-end simulation with a simulator.

Development System Reference Guide

www.xilinx.com

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8.2i specifications

Xilinx 8.2i is a significant version of the Xilinx ISE (Integrated Software Environment) that emerged in the early 2000s, marking an important milestone in the world of FPGA (Field-Programmable Gate Array) development. This version introduced a slew of advanced features, technologies, and characteristics that made it an indispensable tool for engineers and developers in designing, simulating, and implementing digital circuits.

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Xilinx 8.2i also places a strong emphasis on simulation and verification. The version integrates with various simulation tools, allowing for thorough testing of the designs before implementation. This reduces the risk of errors and ensures that the final product meets specifications.

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In summary, Xilinx 8.2i is a robust software development tool that enhances the design process for FPGAs. Its comprehensive features, including multiple design entry options, advanced synthesis and implementation tools, extensive device support, and strong simulation capabilities, make it a valuable resource for engineers and developers striving for innovation in digital design.

Xilinx 8.2i manual Tsim Create a File for Timing Simulation, Option Files for -synth Flow Types

Models: 8.2i

XFLOW Flow Types

Option Files for -synth Flow Types

Table 23-12:Option Files for –synth Flow Type

Description

testclk.prj

–tsim (Create a File for Timing Simulation)

–tsimoption_file

8.2i specifications