Config Create a BIT File for FPGAs, Configoptionfile

Chapter 23: XFLOW

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

Table 23-4:Option Files for –assemble Flow Type

Option Files	Description

fast_runtime.opt	Optimized for fastest runtimes at the
	expense of design performance
	Recommended for medium to slow
	speed designs

balanced.opt	Optimized for a balance between
	speed and high effort

high_effort.opt	Optimized for high effort at the
	expense of longer runtimes
	Recommended for creating designs
	that operate at high speeds

The following example shows how to assemble a Modular Design with a top-level design named “top”:

xflow –p xc2v250fg256-5 –assemble balanced.opt –pd ../pims top.ngo

–config (Create a BIT File for FPGAs)

–configoption_file

This flow type creates a bitstream for FPGA device configuration using a routed design. It invokes the fpga.flw flow file and runs the BitGen program.

Xilinx provides the bitgen.opt option file for use with this flow type.

To use a netlist file as input, you must use the –implement flow type with the –config flow type. The following example shows how to use multiple flow types to implement and configure an FPGA:

xflow –p xc2v250fg256-5 –implement balanced.opt –config bitgen.opt testclk.edf

To use this flow type without the –implement flow type, you must use a placed and routed NCD file as input.

–ecn (Create a File for Equivalence Checking)

–ecnoption_file

This flow type generates a file that can be used for formal verification of an FPGA design. It invokes the fpga.flw flow file and runs NGDBuild and NetGen to create a netgen.ecn file. This file contains a Verilog netlist description of your design for equivalence checking.

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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 Config Create a BIT File for FPGAs, Ecn Create a File for Equivalence Checking

Models: 8.2i