Motorola

Semiconductor Products Sector Application Note

Order Number: AN2009/D Rev. 1, 9/2001

Introduction to the StarCore SC140 Tools: An Approach in Nine Exercises

Emmanuel Roy and David Crawford

This document presents a quick, comprehensive hands-on introduction to the StarCore SC140 DSP core using programming examples and exercises. The goal is to help the software developer start writing high-level language applications in C. Included are software-related tips on how to get the most from the StarCore hardware architecture.

We recommend that you complete the exercises in sequential order. The exercises require the use of the SC140 C tools (including compiler, assembler, linker, and simulator) to generate executable files from C and assembly language source files and to verify the code performance. The tools are invoked from a command prompt (DOS or UNIX). If you desire, you can use an Integrated Development Environment (IDE). Be sure to consult the appropriate IDE manuals. This document provides step-by-step instructions to walk you through the exercises included in the file SC140_exercises.zip. You can download this zip file from the MSC8101 or MSC8102 product page at the following Web address:

http://www.mot.com/SPS

Solutions to the exercises are provided at the end of this application note.

Recommended Reading

•SC140 Core Reference Manual, MNSC140CORE/D

•SC100 C/C++ Compiler User’s Manual, MSC100CCUM/D

•StarCore140 Family DSP Core Instruction Set, STCR140ISRM/D

•Multisample Programming Technique, STCR140MLTAN/D

	Contents
1	Preliminaries	2
2	File I/O Exercise	4
3	Integer and Fractional
	Arithmetic Exercise	5
3.1	Hardware Support on StarCore	5
3.2	Compiler Support on StarCore	6
4	Local Versus Global
	Optimization Exercise	9
5	Memory Alignment Exercise 12
6	Split Summation Exercise ....	16
7	Multi-Sample Exercise	18
8	Control Code: The True Bit
	Exercise	21
9	Calling an Assembly Routine
	From C Exercise	23
10	The Challenge	26
11	Solutions to Exercises	27

Introduction to the SC140 Tools

MOTOROLA

Contents