Real-Time DSP System Design Course and DSP/BIOS II David J. Waldo Associate Professor Oklahoma Christian University 2501 E. Memorial Rd. Oklahoma City,

Real-Time DSP System Design Course and DSP/BIOS II

David J. Waldo

Associate Professor

Oklahoma Christian University

2501 E. Memorial Rd.

Oklahoma City, OK 73013

[email protected]

TI Developer Conference 2002

TI Developer Conference 2002 2

Outline

Real-Time DSP Course Description Real-Time Operating Systems (RTOS) and DSP/BIOS

II Example Project Conclusion References


DSP Courses at Oklahoma Christian

DSP I - DSP Fundamentals– Implementation of discrete-time systems– Finite word length effects– FIR/IIR digital filter design– Power spectrum estimation– Optimal filtering

DSP II - Real-Time DSP System Design DSP III - Adaptive Filtering

– Stochastic processes– Eigenanalysis– Linear prediction– LMS, RLS– Introduction to neural networks


DSP II (Real-Time System Development) Course Content

Software Design Methods– Waterfall software life cycle– COMET– CODARTS– UML

RTOS Features Development of a DSP System


Software Life Cycle - Waterfall Method

Architectural Design

Detailed Design

Coding

Unit Test

Integration Test

System Test

Requirements Analysis


Architecture Design with CODARTS

Environmental and Behavioral Models Distributed Subsystems Concurrent Tasks Information Hiding Modules Integrate Tasks and Information Hiding Modules Specify Component Interfaces Software Development


Real-Time Operating System Features

Data Sharing– Queues– Memory– Semaphores– Mailboxes

Multitasking– Interrupt Subroutines– Tasks– Scheduling

Instrumentation– Timing

RTOS Issues– Deadlock, Priority Inversion


DSP/BIOS II Modules and Features

Data Sharing– MBX, QUE, PIP, SIO, SEM, MEM

Multitasking– HWI, SWI, TSK, PRD

Instrumentation– CLK, STS, LOG, CPU Load Graph, Execution Graph, RTDX


Software Architecture Diagram Notation and DSP/BIOS II Examples

Loosely-coupled FIFO Message Queue

Tightly-coupled Message/Reply Queue

Tightly-coupled Without Reply Queue

Event

Loosely-coupled Prioritized Message Queue

Task HWI, SWI, TSK, PRD

MBX, PIP, QUE/SEM, SIO, SWI mailbox

SEM, SWI mailbox, HWI

MBX, PIP, QUE/SEM, SIO, SWI mailbox

MBX, PIP, QUE/SEM, SIO, SWI mailbox, SEM

MBX, PIP, QUE/SEM, SIO


Design Project

Students work on a project throughout the course For the project students will:

– Choose a real-time DSP project, either self generated or ideas from the professor

– Follow the software life cycle– Write reports documenting progress at each stage– Produce a working real-time DSP based device


Example Project: Overview

Simple project for first semester with small class Develop a Visual Basic application to control the

Imaging Development Kit (IDK) Image processing includes the following functions:

– Sobel– Threshold– Correlation– Dilate– Erode– Median– Noise


Example Project: Requirements Analysis and Specifications

Identified requirements for user interface and processing to be performed (simplified)

– Select different processing for data displayed on the monitor

– Display raw data sample on the computer– Display transformed data sample on the computer


Example Project: System Context Diagram

VideoTransformation

System

Mouse Keyboard

User MonitorVideo DisplayMonitor

Video Camera

Video Input

Video Output

Mouse InputKeyboard Input

User DisplayOutput


Example Project: Integrated Task Structure, Target

VideoCapture

VideoDisplay

Transform

ControlMonitor

UserInterface

Streamingvideo

Streamingtrans. video

Data capturerequest

Trans. datarequest

Transformed data

Captureddata User commands

Usercommands

VideoBoard

VideoBoard


Example Project: Integrated Task Structure, Host

Event driven program (mouse clicks, menu selections, etc.)

Design different from task structure Written in Visual Basic Requirements

– Send user commands to target– Receive data from target as requested– Display data from target

Were not able to display on host because of slow transfer rate over parallel port


Example Project: User Interface


Real-Time DSP Course Needs

Hardware– DSK, EVM, Other

Software– CCS, Visual Basic (or Visual C++, Other OLE)

Course material– Design Process– RTOS Basics - Material and Labs


Conclusion

Use DSP/BIOS II in your next application Develop your own course in real-time system

development or add it to an existing course Visit website and download DSP/BIOS II and RTDX

laboratory assignments now– http://www.oc.edu/faculty/david.waldo/projects/nsfccli/

nsfccli.html– Use them to learn about DSP/BIOS II or use them in your

class– This material is based upon work supported by the National

Science Foundation under Grant No. 9952720


References

Gomaa, Hassan, Software Design Methods for Concurrent and Real-Time Systems, Addison Wesley, 1993.

Gomaa, Hassan, Designing Concurrent, Distributed, and Real-Time Applications with UML, Addison Wesley Professional, 2000.

Kornecki, A., Zalewski, J., Eyassu, D., "Learning Real-Time Programming Concepts through VxWorks Lab Experiments ", Proceedings of 13th SEE&T Conference, Austin, TX, March 2000, pp. 294-301.

Documents

Real-Time DSP System Design Course and DSP/BIOS II David J. Waldo Associate Professor Oklahoma Christian University 2501 E. Memorial Rd. Oklahoma City,