TigerSHARC processor and evaluation board

1
TigerSHARCprocessor and evaluation board

• Different capabilitiesDifferent functionality

2
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

3
TS201S Evaluation board contains 2 processors P0
(DSPA) and P1 (DSPB)
TWO TS201S processors Error messageswhen
linking about P0 and P1 mean problems with code
on specific Processor 0 (P0) Or processor (P1)
4
Evaluation board Link Ports
Designed for star Configuration Up to 8
processorsworking together P0 to P7
(selectableby switches on backof evaluation
board(Never tried Dontdestroy link ports)
5

• 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 board Use MPEG or other players Keep Volume
down Damage and distortion issues
6
Will be using IRQ lines IRQ0 button switch on
panel IRQ1 digital signal from light
sensor Demonstrate SIMPLE dual processing
Buttons and LEDs splitbetween processors Much
stuff on the boardshared between
processors(but NOT all)
7
Evaluation BoardArchitecture
P0 P1
8
Processorscan access each othersINTERNALmemor
y and registers
Processorscan shareEXTERNALmemory Memory alloc
ationdepends on ID
MEMORY MAP USED IN 8 TigerSHARC PROCESSOR CLUSTER
9
Note labeled processor A and Brather than
processor 0 and 1
10
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
11
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

12
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 TigerSHARCs highly parallel processing
  capability.
• Basically looking for something reasonably easy,
  but non-trivial, to hang the lectures and
  laboratories on.

13
Example of a suitable projectTSL230R-Based Pulse
Oximeter

• A 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
  patients finger.
• Adapted from
• www.circuitcellar.com/library/print/1204/Bachioch
  i173/4.htm

14
What to we expect to see?

• As blood flows through the circulatory system, it
  changes density because of the hearts 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

15
How we far will go in the laboratory is your
choice

• Study 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/Bachioch
  i173/4.htm

16
Details from Circuit Cellar Article

• The TSL230Rs 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 lights path.
• Adapted from
• www.circuitcellar.com/library/print/1204/Bachioch
  i173/5.htm

17
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/Bachioch
  i173/7.htm

18
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

19
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

20
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

21
Standard development methodWaterfall method

• Heavy on documentation, light on testing

TLD -- IDAA TestLastDevelopment(if done at
all)
22
TESTS EXPRESS DESIGN INTENTTDD approach to
develop C code

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

CUSTOMER DEVELOPER
23
Some embedded stuff on test driven development in
the literature

• Examine in more detail as part of individual
  presentation?

24
Speed improvements when we use the C optimizer

• Rule 1 of assembly code programming
• Dont 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

25
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