Analog Devices ADSP-2181 EZ-KIT LITE C Programs Application Note

About this manual

This document provides an Engineer To Engineer Note (EE-14) detailing a basic C program for the ADSP-2181 EZ-KIT LITE evaluation board. The note explains how to use the CTIP35.C routine to create a simple talk-thru application that loops audio input from the AD1847 stereo codec back to the output. It assumes the user has the complete Analog Devices software suite installed.

What's inside

• Extensions to the ANSI C compiler
• Accessing memory-mapped registers in C
• Handling interrupts
• Embedding assembly instructions in C code
• Calling DSP programs/routines
• Handling Real Time environments
• Compiling your program

Specifications

Frequently asked questions

What is the main C program provided in this note?

The main C program is CTIP35.C, which provides a simple shell for use with the ADDS-21XX-EZ-LITE.

Does the EZ-KIT LITE include a C compiler?

No, the EZ-KIT LITE comes with software but does not include the C compiler.

How do you create a circular buffer in C code?

You must use the assembly directive asm(".var/dm/ram/circ rx_buf_[3];") to create a circular buffer.