Opening Lecture 2012

7/28/2019 Opening Lecture 2012

1/51

Digital Signal ProcessingLaboratory Work 521280S

Miguel Bordallo,[email protected], TS301

Department of Computer Science and Engineering (CSE)

University of Oulu
mailto:[email protected]:[email protected]


2/51

Organization of the course

The course consists on only ONE exercise

Divided into sections

Probably published in two or more parts

Assistant:

TMS320C67x exercise: Miguel Bordallo: [email protected] ,TS301


3/51

Credits, grades

When the exercise of the course iscompleted, you will receive 5 ECTS

New amount of credits!!

No exams: each returned exercise will beeither accepted or rejected

When accepted, a grade 1-5 will be given

depending on the overall quality Documentation, accuracy of the answers,

reasoning, elegance of solutions !!!

Grades are negotiable (self assesment)


4/51

Doubts about organization

Check the official webpage of the coursein Noppa

For news and updates

Old style website also in use (in case Noppa fails)

Contact the assistant (me) in third floor:

For questions For returning completed exercises


5/51

Registration to the course

Register by sending the group membernames by email to me or adding themnow to the registration list.

Register also in Weboodi if you want toget emails


6/51

Organization of groups Recommended: Before December 1st

Maximum two students per group Alone is possible but same workload

You will need a grey key and permission

for the development class room TS139 Send me email with key number.

Access granted December 3rdor one week after email

If you don't yet have the grey key, youmust first obtain it. Instructions are here:

http://www.otit.fi/site/index.php/etusivu/tietopankki/41-avainhakemus


7/51

Instructions

Instructions will be published and updated on the coursewebpage on the corresponding section:

https://noppa.oulu.fi/noppa/kurssi/521280s/

If you need, borrow the course instructions from coursematerial shelf ("Lainattava kurssimateriaali") in third floorfor copying

Do not print large manuals! The full manuals are availablein the exercise class room; you may print a few pages forreference but printing the manuals is useless
https://noppa.oulu.fi/noppa/kurssi/521280s/https://noppa.oulu.fi/noppa/kurssi/521280s/


8/51

Before the exercise

A period of study: (about two weeks) Basics of Digital Signal Processing

Frequency domain processing, FFT, IIR and FIR

Filtering, Interpolation, Decimation,CIC Filters,

Multirate processing, Adaptive Filters (LMS)

Programming concepts

C, Embbeded programming, Real-time, DSP

Interruptions, Compiler optimization, Intrinsics,Inline assembly, Memory management

DSP architecture

Pipelining, number of units, parallelization of

instructions and data


9/51

Before the exercise

A questionary will be published this week No need to return it

But you can return it if you want

It will have many questions of things you

need to know

Covers problems that you will face later


10/51

Doing the exercise

Instructions will be published around 2nd ofDecember: (Published in two parts)

They will contain a guide to do the exercise (7

questions), that must be done in order

A Project Template with tools and a code skeleton

will be distributed with them

The code must be written in C language

A small exercise requires the use of DSP

assembly language (specified in the exercise

instructions)


11/51

Doing the exercise

First, the code should be developed on workstationclasses (e.g. TS138) (except assembly functions)

Only when the algorithm is functional and correct,

you can switch the development environment to theDSP stations (TS139)

Optimizations (and measurements) must be made

on DSP platform: Rewriting some functions

Memory management

ASM coding


12/51

Doing the exercise

Laboratory fully functional on December 15th:

There will be several C67x platforms available, and

they are located in room TS139

Before going to use the computers, it is recommended to

reserve a time (max 2 hours)

Reservation must be done on the Internet athttp://www.ee.oulu.fi/research/tklab/courses/521485S/reservation/

You may create a temporary working directory in the

development computers

It must be deleted after use!

Always make backups e.g. email, unix server, usb mem.
http://www.ee.oulu.fi/research/tklab/courses/521485S/reservation/http://www.ee.oulu.fi/research/tklab/courses/521485S/reservation/


13/51

Returning the exercise

The finished exercise work should be returned

before May 31st , 2013 (Early bird deadline: March31st . It means one extra point: minimum grade 2)

It must contain answers for all questions and all written

code in appendices.

Dsp_lab.c + multiply.s62 + DSP_report.pdf

If you are unable to finish the work in time, you

should explicitly ask for additional time.

Although support is not guaranteed outside official dates


14/51

Returning the exercise (2)

You may use any published information

(books, Internet) for completing the work

You must always reference the source if you

directly cite some material

The exercise instructions may require you to

actually write yourself parts of the code

(e.g. no copying of FFT code) Copying code from other students is always

prohibited


15/51

Self Assesment

It is advised to create a working timemanagement diary

Number of hours done by every student

Description of tasks done in every hour

Students propose their own grade

Can be accepted or changed Based on published criteria

Can be the same for both or different

Negotiation possible


16/51

Evaluation Grades from 1-5

Functional work: 1 points. COMPULSORY !!!

Early bird deadline: 0-1 point

Quality of documentation: 0-2 points

Filter design, scheme, detailed time management

Quality of code: 0-2 points

Comments, structure, indentation, speed

Accuracy of measurements: 1 points

Realistic vs. unrealistic

Audio quality + filter design quality: 1 point


17/51

Schedule November 12th: Initial lecture

You are already here

November 15th: Preliminary questionary published No need to return the answers (but you can)

December 1st: Groups formed. Key numbers sent.

December 2nd: Exercise instructions published Coding can start in UNIX stations

December 15th: DSP-Laboratory fully equipped At least 2 boards will be operating (C6711 or C6713)

March 31st: Early bird deadline It grants 1 extra point (minimum grade: 2)

May 31st: Last day to return exercises You MUST inform if you are not meeting the deadline


18/51

Where?


19/51

What is a DSP Solution ?DIGITAL SIGNAL PROCESSING SOLUTIONS

DSP + Analog + Development Tools + SW + System Expertise

DSP Chip Market

Fast growing segment in the SCmarket (>12% CAGR)


20/51

TMS320 DSP FamiliesC2000

>50 ProductsASP: $3 - $15

Worlds most code-efficient DSP

Advanced embedded controlapplications

Leadership integration of analogand high-speed Flash memory

C28x fully code compatible


21/51








C5000

Worlds most power-

efficient DSPWorlds most popularDSP

Heart of handheld solutionsin Internet era



22/51








C5000 C6000

Worlds most power-

efficient DSPWorlds most popularDSP

Heart of handheld solutionsin Internet era



Worlds highest-

performance DSP Used in high-bandwidth

comms and videoequipment

C64x fully codecompatible


23/51








C6000

Worlds most power efficient and highest

performance DSPWorlds most popularDSP

Heart of handheld solutions in Internet era



24/51

C6000 DSP platform

Millions shipped to hundreds ofcustomers

Worlds highest-performance DSP

Heart of solutions for new, high-bandwidthcommunications and video equipment

Wireless basestations and transcoders

DSL

Home theater audio Digital radio

Imaging and video servers & gateways

Smartphone SoCs !!!

New generation C67x DSP products fullycode compatible

>30 Products

ASP: $10 - $350


25/51

What can I do with a DSP ?


26/51

What can I do with a DSP ? Process signals:

VERY FAST using VERY LITTLE POWER


27/51

What can I do with a DSP ? Process signals:

VERY FAST using VERY LITTLE POWER

Eight cores


28/51

Digital Signal Processing

Laboratory Work 521485SC67x exercise

Miguel Bordallo,[email protected], TS301

Department of Computer Science and Engineering (CSE)

University of Oulu


29/51

C67x Development Platform

TMS320C67x is Texas Instruments' family offloating point digital signal processors. It is downward compatible with the TMS320C62x fixed

point family,

Very Long Instruction Word (VLIW) architecture,

256-bit wide Instruction Fetch Packed (IFPs) Contains up to 8 simple 32-bit RISC Instructions

Execution is started simultaneously at the same clockcycle.

The instructions are pipelined: new instructions can be dispatched before earlier

instructions have finished.


30/51

C67x Development Platform (2)

Special instructions for loading and storing data from and tomemory;

All arithmetic instructions can use directly built-in registers.

The instructions have flexible addressing modes: Register direct, register indirect, and base + index modes are

supported.

The index register can be post- or preincremented or decremented.

Two register sets: both have sixteen 32-bit registers (Or up to 32 smaller registers).

Two 32-bit registers can be combined into one 64-bit floating pointor a 40-bit fixed point register.

The DSP has plenty of computing resources: there are twomultipliers and six arithmetic-logical units (ALUs).


31/51


The DSP is attached to the DSP Starter Kit (DSK) where itis clocked at 150/225 MHz rate. The DSK contains power supply, - line in and speaker connectors,

6 megabytes of SDRAM, - 16-bit D/A and A/D converters,

128 kilobytes of flash ROM, - Parallel/USB port interface programmable LEDs,

The code development can be made with Code ComposerStudio (CCS),

integrated development environment (IDE) containing: code editor,

C compiler,

assembler,

linker,

debugger

Utilities


32/51

Code Composer Studio

DSP industrys firstcomprehensive, openIntegrated DevelopmentEnvironment (IDE)

Advanced visualization Intuitive ease-to-use

Third-party plug-ins

Visualization without

stopping the processor


33/51


The Code Composer Studio contains a firmwarekernel called DSP/BIOS, provides basic runtime services for managing block-based

data transfers.

Analog-to-digital (A/D) converter produces samples one by

one, generating a hardware interrupt for each.

The DSP/BIOS collects the samples into a frame. When the frame fills up, a software interrupt is generated

The control is transferred to the user application.

The application will receive the whole frame at once, It does not need to take care of collecting single samples.

DSP/BIOS contains routines for outputting framed data viadigital-to-analog (D/A) converter.

C67 E i


34/51

C67x Exercises All C code can be written by modifying example program:

dsp_lab.c.

Exercise questions increase in complexity Last questions combines results from previous questions:

questions should be done in order

For doing the exercises, you must understand: Generation of sine signals using IIR filters Decimation

Interpolation

Implementation of a fast Fourier transform (FFT)

Frame based processing,

Overlap save algorithm, CIC filtering, LMS filtering

Basics of C67x architecture (DSP assembly, DSP architecture)

Most code should be written on any workstation, but thefinal program must run on the DSPs


35/51

C67 Exercise (2)

Audio in

USB/


36/51

C67 Exercise (2)

Audio in

USB/


37/51

C67 Exercise (2)

USB/USB/

Bypass function


38/51

C67 Exercise (2)

USB/USB/


39/51

C67 Exercise (2)

USB/USB/


40/51

C67 Exercise (2)

USB/

Filter

USB/


41/51

C67 Exercise (2)

USB/

Filter

FFT

USB/


42/51

C67 Exercise (2)

USB/

Filter

FilterFilter

FFT

USB/


43/51

C67 Exercise (2)

USB/

Filter

FilterFilter

Filter Filter

FFT

USB/


44/51

C67 Exercise (2)

USB/

Filter

FilterFilter

Filter

Filter

Filter

FFT

USB/


45/51

C67 Exercise (2)

USB/

Filter

FilterFilter

Filter

Filter

Filter

FFT

ASM

USB/


46/51

C67x Exercise (3)

The final version of the exercise

instructions and the final code template

will be published by December 2nd

Access to the DSP lab will be granted in

two weeks. The lab will be Fully

operative about 15th December

First steps of the development should be

done on a workstation

H t d ?


47/51

How to proceed ?1. Study the concepts on the questionary carefully

2. Study the algorithms and concepts involved Convolution, complex multiplication, IIR, FIR, overlap-save

3. Answer the questions to test your knowledge

4. Study the EXERCISE INSTRUCTIONS carefully (all of them)

5. Gather the documentation that you will need

6. Design the algorithms. Test some parts with MATLAB (e.g. FFT)

7. Start coding on a Unix station

Test your code against well known results (e.g. in Matlab)

8. When the final code is working:

Think about the DSP architecture and make some changes Check the memory usage. Check the data types. Check the use of

very slow functions (such as pow() or sinf() )

9. Move to the DSP platform


48/51

In the DSP platform

1. Test the environment

2. Familiarize yourself with the debugging tools

3. Try your code

Only the code that works on a Unix station has chances of

working on the DSP

4. Debug, debug, debug, debug, debug

5. Debug a little more

6. When the code works:

Make the final time measurements.

Compile your answers into a document.

Return the exercises including the code (C + assembly)


49/51

In case of problems

Read the instructions and the webpage (FAQ)

It might be that the question is alreadyanswered there

First, send and email to me.

Always attatch the code and results Specify the problem as much as possible, so it can

be reproduced.

I will answer with debugging strategies and

suggestions of tests. If all fails, I will set up a time to meet you in the

lab.


50/51

Questions?

??

??

?? ??

??

??

??

??


51/51

Schedule November 12th: Initial lecture

You are already here November 15th: Preliminary questionary published

No need to return the answers (but you can)

December 1st: Groups formed. Key numbers sent.

December 2nd: Exercise instructions published Coding can start in UNIX stations

December 15th: DSP-Laboratory fully equipped At least 2 boards will be operating (C6711 or C6713)

March 31st: Early bird deadline It grants 1 extra point (minimum grade: 2)

May 31st: Last day to return exercises You MUST inform if you are not meeting the deadline

Opening Lecture 2012

Documents