Chapter 23: XFLOW

R

The following figure shows the inputs and the possible outputs of the XFLOW program. The output files depend on the flow you run.

Design File

FLW File

OPT File

Trigger Files

XFLOW

HIS File

LOG File

SCR or BAT or TCL File

Flow Dependent Output Files

Application Data

Programming

Files

Files

Annotated

Testbench

Netlist Files

Files

Timing Data

Report Files

Files

 

 

Guide Files

X9859

Figure 23-1:XFLOW Design Flow

XFLOW Syntax

Following is the command line syntax for XFLOW:

xflow [p partname][flow type][option file[.opt]] [xflow options] design_name

flow type can be any of the flow types listed in “XFLOW Flow Types”. Specifying a flow type prompts XFLOW to read a certain flow file. You can combine multiple flow types on one command line, but each flow type must have its own option file.

option file can be any of the option files that are valid for the specified flow type. See “XFLOW Option Files” for more information. In addition, option files are described in the applicable flow type section.

xflow options can be any of the options described in “XFLOW Options”. They can be listed in any order. Separate multiple options with spaces.

design_name is the name of the top-level design file you want to process. See “XFLOW Input Files” for a description of input design file formats.

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Xilinx 8.2i manual Xflow Syntax, 1XFLOW Design Flow

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.