accelerating functions with the c2h compiler: scatter ...

下载该文档文档格式：PDF 更新时间：2006-07-02 下载次数：0 点击次数：1

文档基本属性

文档语言：

Simplified Chinese

文档格式：

pdf

文档作者：

ISOYES

关键词：

主题：

备注：

点击这里显示更多文档属性

Accelerating Functions with the C2H Compiler: Scatter-Gather DMA with Checksum
July 2006, Version 1.1 Application Note 417
Introduction
The Nios II C-to-Hardware Acceleration (C2H) Compiler is a powerful tool that generates hardware accelerators for software functions. This application note uses the C2H Compiler to map C code for a scatter-gather direct memory access (DMA) function to equivalent hardware. The hardware accelerator provides data to an Internet checksum function. Reference files included with the application note provide C code to implement the scattergather DMA and the checksum. There are two versions of the checksum code: The first runs as software on the Nios II processor. The second becomes a hardware accelerator, replacing the C code with equivalent logic in the FPGA. The speedup for the hardware version is typically more than two orders of magnitude. The exact speedup depends on the target FPGA. Although the scatter-gather DMA code in this example design is tightly integrated with the checksum code, it could be modified to become a front-end DMA accelerator for a number of different applications, such as networking, audio, video, or high speed I/O. The concluding sections of this application note mention additional architectural revisions you could make to the design to further improve system performance with the C2H Compiler.
Prerequisites
This application note assumes you are familiar with the following topics:
■ ■ ■ ■ ■
f
ANSI C syntax and usage Defining and generating Nios II hardware systems with SOPC Builder Compiling Nios II hardware systems with the Altera Quartus II development software Creating, compiling, and running Nios II software projects Nios II C2H Compiler
To familiarize yourself with the basics of the C2H Compiler, refer to the Nios II C2H Compiler User Guide. To learn about defining, generating, and compiling Nios II systems, refer to the Nios II Hardware Development Tutorial. To learn about Nios II software projects, refer to the Nios II Software Development Tutorial available in the Nios II IDE help system.

下一页

文档基本属性
文档语言：	Simplified Chinese
文档格式：	pdf
文档作者：	ISOYES
关键词：
主题：
备注：
点击这里显示更多文档属性
经理：
单位：	ISOYES国际认证联盟
分类：
创建时间：
上次保存者：
修订次数：
编辑时间：
文档创建者：
修订：
加密标识：
幻灯片：
段落数：
字节数：
备注：
演示格式：
上次保存时间：