Norun Creates a Script File Only, Ooutputfilename

Chapter 23: XFLOW

–norun (Creates a Script File Only)

By default, XFLOW runs the programs enabled in the flow file. Use the –norun option if you do not want to run the programs but instead want to create a script file (SCR, BAT, or TCL). XFLOW copies the appropriate flow and option files to your working directory and creates a script file based on these files. This is useful if you want to check the programs and options listed in the script file before executing them.

Following is an example:

xflow -implement balanced.opt -norun testclk.edf

In this example, XFLOW copies the balanced.opt and fpga.flw files to the current directory and creates the following script file:

###########################################

#Script file to run the flow

###########################################

#Command line for ngdbuild

ngdbuild -p xc2v250fg256-5 -nt timestamp /home/ xflow_test/testclk.edf testclk.ngd

#Command line for map

map -o testclk_map.ncd testclk.ngd testclk.pcf

#Command line for par

par -w -ol 2 -d 0 testclk_map.ncd testclk.ncd testclk.pcf

#Command line for post_par_trce

trce -e 3 -o testclk.twr testclk.ncd testclk.pcf

–o (Change Output File Name)

–ooutput_filename

This option allows you to change the output file base name. If you do not specify this option, the output file name has the base name as the input file in most cases.

The following example shows how to use the –o option to change the base name of output files from “testclk” to “newname”:

xflow -implement balanced.opt -o newname testclk.edf

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Development System Reference Guide

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.

One of the standout features of Xilinx 8.2i is its enhanced design entry capabilities. This version supports multiple design entry methods, including schematic entry, VHDL, and Verilog HDL, giving engineers the flexibility to choose their preferred approach. The integrated environment provides user-friendly graphical interfaces, making it accessible for both novice and experienced users.

Xilinx 8.2i's synthesis tools have been improved to enable more efficient design compilation and optimization. The new algorithms used in this version facilitate faster synthesis times while reducing power consumption and improving performance. Furthermore, it features support for advanced FPGA architectures, which allows for the implementation of more complex designs with greater efficiency.

The implementation tools in Xilinx 8.2i include advanced place and route capabilities, utilizing state-of-the-art algorithms for optimized resource usage. These tools enable designers to make better use of FPGA resources, ensuring that designs fit within the constraints of the target device while maximizing performance.

Another key characteristic of Xilinx 8.2i is its extensive support for various Xilinx devices such as the Spartan, Virtex, and CoolRunner series. This compatibility ensures that developers can leverage the powerful features of these FPGA families, including high-speed transceivers and DSP slices.

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.

In addition, this version includes support for design constraints, enabling engineers to specify timing, area, and other critical design parameters. By accommodating constraints, Xilinx 8.2i helps in achieving reliable and efficient designs tailored to project needs.

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 Norun Creates a Script File Only, Change Output File Name, Ooutputfilename

Models: 8.2i