User guide
Table Of Contents
- Return to Menu
- System Generator for DSP
- Table of Contents
- About This Guide
- Introduction
- Installation
- Release Information
- Getting Started
- Introduction
- Lesson 1 - Design Creation Basics
- The System Generator Design Flow
- The Xilinx DSP Blockset
- Defining the FPGA Boundary
- Adding the System Generator Token
- Creating the DSP Design
- Generating the HDL Code
- Model-Based Design using System Generator
- Creating Input Vectors using MATLAB
- Lesson 1 Summary
- Lab Exercise: Using Simulink
- Lab Exercise: Getting Started with System Generator
- Lesson 2 - Fixed Point and Bit Operations
- Lesson 3 - System Control
- Lesson 4 - Multi-Rate Systems
- Lesson 5 - Using Memories
- Lesson 6 - Designing Filters
- Additional Examples and Tutorials
- Index
System Generator for DSP Getting Started Guide www.xilinx.com 67
UG639 (v 12.2) July 23, 2010
Lesson 3 - System Control
The Expression Block
The Expression block performs a bitwise not, and, or & xor on two input signals. The inputs can have a word length
greater than 1. In cases where the two inputs have different word lengths, the binary points are matched up and
then an element-by-element boolean operation is performed. This block provides a useful way to implement logical
control in a DSP system