TigerSHARCprocessor and evaluation board

Different capabilitiesDifferent functionality

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Concepts tackled

Differences between “processor” and “evaluation board” Functionality present on TigerSHARC evaluation board TigerSHARC is NOT a microcontroller.

A/D and D/A added simply to give evaluation board “something to process” ENEL619.04 (Topic 23) “project”

Learn about TigerSHARC processor architecture Learn basics of how assembly code and architecture interact Set up a project (mainly in) in “C++” to capture a signal Do some signal processing in “C++” Work through optimizing “one” subroutine into assembly code using more and more

parallel processor features Use the same (or equivalent) code to look at optimization issues on other processor

Blackfin, TI C64XX+ and C64XX, and Beagle (2 core with ARM and TI C64XX

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TS201S Evaluation board contains 2 processors P0 (DSPA) and P1 (DSPB)

TWO TS201S processors

Error messageswhen linking about P0 and P1 mean problems withcode on specificProcessor 0 (P0)Or processor (P1)

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Evaluation board – Link Ports

Designed for “star”Configuration –Up to 8 processorsworking together

P0 to P7 (selectableby switches on backof evaluation board(Never tried – Don’tdestroy link ports)

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JTAG debug ONLY AVALIABLE IN 3rd floor labs•ICT318 TigerSHARC (some stations).• ICT320 Blackfin (some stations).

Some boards available for home use of USB connector. Lower speed communication rates than JTAG (factor of 20 - 100).

Discuss deposit issues for home loan.

Audio connectors.Max input voltage around 1 V p-pwith no DC.

Too great a voltage destroys the boardUse MPEG or other players

Keep Volume downDamage and distortion issues

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Buttons and LEDs splitbetween processors

Much “stuff” on the boardshared between processors(but NOT all)

Will be using IRQ lines

IRQ0 – button switch on panel

IRQ1 – digital signal from light sensor

Demonstrate “SIMPLE” dual processing

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Evaluation BoardArchitecture

P0

P1

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Processorscan shareEXTERNALmemory

Memoryallocationdepends on ID #

Processorscan access each other’sINTERNALmemory and registers

MEMORY MAP USED IN 8 TigerSHARC PROCESSOR CLUSTER

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Note – labeled processor A and Brather than processor 0 and 1

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Note – labeled processor A and Brather than processor 0 and 1

Will be using IRQ lines

IRQ0 –button switch on panel

IRQ1 – digital signal from light sensor

Demonstrate “SIMPLE” dual processing

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How to use the evaluation board capability Read a lot in the hardware manual

Modify some of the example programs provided in

C:\Program Files\Analog Devices\VisualDSP 5.0\TS\Examples\ADSP-TS201 EZ-Kit Lite

and then read a lot in the hardware manual

CONCEPT OF LABS Signal processing demonstrated through the

development of algorithms for an improved doctors “stethoscope” and associated equipment.

Demonstration rather than commercial exploitation of TigerSHARC’s highly parallel processing capability. Basically looking for something reasonably easy, but non-

trivial, to hang the lectures and laboratories on.

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Example of a suitable projectTSL230R-Based Pulse OximeterA small section of plastic electrical conduit houses

both the TSL230R sensor and the red and IR LEDs. The TSL230R registers the amount of light passing through the inside diameter of the conduit, which, in this case, is through a patient’s finger.

Adapted from

www.circuitcellar.com/library/print/1204/Bachiochi173/4.htm

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What to we expect to see?As blood flows through the circulatory system, it changes density

because of the heart’s pumping pressure. This change also changes the absorption rate of light, effectively modulating the light absorption. The total light absorption is a combination of modulated and constant absorption, which is similar to a small AC noise riding atop a DC voltage.

Adapted from www.circuitcellar.com/library/ print/1204/Bachiochi173/4.htm

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How we far will go in the laboratory is your choiceStudy the absorption relationship of oxygen levels in

the blood for the red and IR wavelengths. Notice how the oxygen level affects the absorption rate at the red wavelength while it remains almost constant at IR wavelengths.

Adapted from

www.circuitcellar.com/library/print/1204/Bachiochi173/4.htm

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Details from Circuit Cellar ArticleThe TSL230R’s frequency output displayed on my

oscilloscope shows a slow frequency jitter marked by the vertical cursors. The output frequency shifts with the varying amount of light absorption because of the blood pulsing within the light’s path.

Adapted from

www.circuitcellar.com/library/print/1204/Bachiochi173/5.htm

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Period of light sensor from article – can we do better?This Excel chart displays imported sample values over

time. Samples of the output frequency (30 samples per second formatted in microseconds) were sent out the serial port and captured to a file by HyperTerminal.

Adapted from

www.circuitcellar.com/library/print/1204/Bachiochi173/7.htm

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Labs. Check article for how “determine heart rate” was

handled in original article. Can we pick out a more accurate heart beat /

signal using a DSP convolution / correlation approach? These are numerical methods involving much memory use,

adds and multiplications. Typical DSP stuff. Straight forward optimization show TigerSHARC capability If did on Beagle, Blackfin – what differences in development and

performance

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ECE-ADI-Project Was asked to develop (as part of Analog Devices University

Ambassadorship) to develop demonstration programs and place on the web Have now developed

SHARC – ADSP-21061 (Previous 515) Audio project utilities

Blackfin – ADSP-BF533 (ENCM511 in 2008) Audio project utilities, Video Project utilities

Blackfin – ADSP-BF533 (Current ENCM491 – Nygren) Real time operating systems

TigerSHARC – ADSP-TS201 (Current ENCM515, ENCM619.04 (Topic23) Embedded Test Driven Development Environment (E-TDD)

Blackfin, TigerSHARC, SHARC, Microsoft studio Find at http://www.enel.ucalgary.ca/People/Smith/

ECE-ADI-Project/Index/index.htm

The code is not well written unless it is testable Write C code with tests to show concepts

works Optimize the code in one way, use same test

to show still works but faster Optimize the code in another way, use same

test to show still works but faster still Move code over to another processor, use

same tests etc

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Standard development methodWaterfall method Heavy on documentation, light on testing

DescribeRequirements

Design Solution

Build Solution

Test Solution

WriteAnalysis Document

WriteDesign Document

WriteTest Plan Document

TLD -- IDAA

TestLastDevelopment

(if done at all)

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TESTS EXPRESS DESIGN INTENTTDD approach to develop C++ code

DescribeRequirements

Design Solution

Build Solution Test Solution

WriteAcceptance Tests

WriteUnit Tests

CUSTOMER

DEVELOPER

Work with customer to check that the TESTS PROPERLY EXPRESS WHAT CUSTOME WANTS DONE Iterative process with customer “heavily involved” – “Agile” methodology.

Some embedded stuff on test driven development in the literature Examine in more detail as part of

“individual” presentation?

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Rule #1 of assembly code programming

Don’t use assembly code programming

What speed improvements occur when you turn on the “C++ optimizer” – use Embedded Unit “Timing features”?

Wewill look at the code in detail to understand how the compiler is taking advantage of TigerSHARC processor to get code optimization. Initially we will “look” at that code and say “oh my!” Later we can think about comparing the performance of the compilers

on different processors. Position paper or project

Speed improvements when we use the “C++” optimizer

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Concepts tackled

Differences between “processor” and “evaluation board” Functionality present on TigerSHARC evaluation board TigerSHARC is NOT a microcontroller.

A/D and D/A added simply to give evaluation board “something to process” ENEL619.04 (Topic 23) “project”

Learn about TigerSHARC processor architecture Learn basics of how assembly code and architecture interact Set up a project (mainly in) in “C++” to capture a signal Do some signal processing in “C++” Work through optimizing “one” subroutine into assembly code using more and more

parallel processor features Use the same (or equivalent) code to look at optimization issues on other processor

Blackfin, TI C64XX+ and C64XX, and Beagle (2 core with ARM and TI C64XX