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Xilinx 8.2i manual Xflow Output Files

Models: 8.2i

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Chapter 23: XFLOW

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•FLW File—The flow file is an ASCII file that contains the information necessary for XFLOW to run an implementation or simulation flow. When you specify a flow type (described in “XFLOW Flow Types”), XFLOW calls a particular flow file. The flow file contains a program block for each program invoked in the flow. It also specifies the directories in which to copy the output files. You can use the default set of flow files as is, or you can modify them. See “Flow Files” for more information.

•OPT Files—Option files are ASCII files that contain options for each program included in a flow file. You can create your own option files or use the ones provided by Xilinx. See “XFLOW Option Files” for more information.

•Trigger Files—Trigger files are any additional files that a command line program reads as input, for example, UCF, NCF, PCF, and MFP files. Instead of specifying these files on the command line, these files must be listed in the Triggers line of the flow file. See “XFLOW Flow Types” for more information.

XFLOW Output Files

XFLOW always outputs the following files and writes them to your working directory.

•HIS file—The xflow.his file is an ASCII file that contains the XFLOW command you entered to execute the flow, the flow and option files used, the command line commands of programs that were run, and a list of input files for each program in the flow.

•LOG file—The xflow.log file is an ASCII file that contains all the messages generated during the execution of XFLOW.

•SCR, BAT, or TCL file—This script file contains the command line commands of all the programs run in a flow. This file is created for your convenience, in case you want to review all the commands run, or if you want to execute the script file at a later time. The file extension varies depending on your platform. The default outputs are SCR for UNIX and BAT for PC, although you can specify which script file to output by using the $scripts_to_generate variable.

In addition, XFLOW outputs one or more of the files shown in the following tables. The output files generated depend on the programs included in the flow files and the commands included in the option files.

Note: Report files are written to the working directory by default. You can specify a different directory by using the XFLOW –rd option, described in “–rd (Copy Report Files)”, or by using the Report Directory option in the flow file, described in “Flow Files”. All report files are in ASCII format.

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Xilinx 8.2i manual Xflow Output Files
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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.

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.