Chapter 3: Tcl

R

Xilinx Namespace

All Xilinx Tcl commands are part of the Tcl namespace ::xilinx::. If another Tcl package uses a command name that conflicts with a Xilinx-specific Tcl command name, the Xilinx namespace must be used to access the command. For example, type the following to create a new project using Xilinx-specific Tcl commands:

% xilinx::project new <project_name>

It is only necessary to specify the Xilinx namespace when you have more than one namespace installed.

Xilinx Tcl Commands

The following sections include detailed listings of Xilinx Tcl commands, which are divided into two parts:

•Tcl Commands for General Usage

•Tcl Commands for Advanced Scripting

Each detailed listing includes the description, syntax, an example, and the Tcl return for each command.

In most cases, the examples shown assume that a project has been created with the project new command or a project has been opened with the project open command. Project files are added with the xfile add command.

To view how Xilinx Tcl commands can be used in a realistic way, see the “Example Tcl

Scripts” located at the end of this chapter.

The following tables summarize the Xilinx Tcl commands based on those for general usage and those for advanced scripting.

Table 3-1:Xilinx Tcl Commands for General Usage

Commands

Subcommands

 

 

partition (support design preservation)

delete

 

get

 

new

 

properties

 

rerun

 

set

 

 

process (run and manage project processes)

run

 

 

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Development System Reference Guide

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Xilinx 8.2i manual Xilinx Namespace, 1Xilinx Tcl Commands for General Usage Subcommands
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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.
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