TigerSHARC processor and evaluation board

1
TigerSHARCprocessor and evaluation board

• Different capabilitiesDifferent functionality

2
Concepts tackled

• Differences between processor and evaluation
  board
• Functionality present of TigerSHARC evaluation
  board
• Accessing the A2D and D2A in an easy way needed
  for all Labs.

3
Evaluation board P0 and P1
TWO TS201S processors Error messagesabout P0
and P1mean code on specific processor
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
Audio connectors.Max input voltage around 1 V
p-pwith no DC. Too great a voltage destroys the
board Use MPEG or other players and keep Volume
down Damage and distortion issues

• JTAG ONLY AVALIABLE IN 3rd floor labs
• Higher speed communication rates than USB
  (factor of 20 - 100)
• ICT320 TigerSHARC
• ICT318 Blackfin (some stations).

6
Buttons and LEDs splitbetween processors Much
stuff on the boardshared between
processors(but NOT all)
7
Evaluation BoardArchitecture
P0 P1
8
Processorscan sharememory Memory allocationdep
ends on ID
9
Note labelled processor A and Brather than
processor 0 and 1
10
Note labelled processor A and Brather than
processor 0 and 1
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 3.5
  32-Bit\TS\EZ-KITs
• and then Read a lot in the hardware manual

12
Laboratory 1 Part 2

• This makes use of the analog to digital converter
  and the digital to analogue converter to provide
  audio sound signals that we can process with the
  high speed algorithms we develop during the
  course
• We will need to learn about
• Interrupts which, how many, why, how?
• A2D, D2A which, how many, why, how?
• We need to learn about all this stuff before the
  end of the course but not now Now we just
  want to use it

13
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 (Current ENCM415 Lec. 01)
• Audio project utilities, Video Project utilities
• TigerSHARC ADSP-TS201 (Current ENCM515)
• 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

14
Using the code

• Files need See Lab. 1 Part 2
• You will need to build a project file Audio.dpj
• Also link in you code from assignment 1 --
  myAssignment1.cpp
• 05Labs/05FilesNeeded/05Lab1AudioProject/KnownLocat
  ion1Nov04.cpp
• 05Labs/05FilesNeeded/05Lab1AudioProject/main_Sound
  1Jan05.cpp
• 05Labs/05FilesNeeded/05Lab1AudioProject/processsou
  nd1Jan05.cpp
• 05Labs/05FilesNeeded/05Lab1AudioProject/examinesig
  nal.cpp
• 05Labs/05FilesNeeded/05Lab1AudioProject/processors
  pecific1Nov04.h
• 05Labs/05FilesNeeded/05Lab1AudioProject/soundsourc
  eClass1Nov04.h
• 05Labs/05FilesNeeded/05Lab1AudioProject/student_ad
  iprocessor1Jan05.h
• 05Labs/05FilesNeeded/05Lab1AudioProject/TS201Onlin
  eLib1Jan05_CHAR8.dlb
• 05Labs/05FilesNeeded/05Lab1AudioProject/TSXXXproce
  ssorspecific1Nov04.h

15
ADISoundSource sounddemo(processor,
which_soundsource,

processing_options)

• Does all the hard stuff
• Sets up interrupts
• Sets up interrupt service routine
• Sets up variety of options
• Useful things to know
• which__soundsource LOCAL_AUDIOSOURCE
  MONO"Generate a local sound source output D2A
• which__soundsource CODEC_AUDIOSOURCE
  MONO"Uses the CODEC as sound source input A2D
  and output A2D
• processing_options allow you to switch quickly
  between a variety of versions of functions
  (Probably not used this year as the E-TDD
  environment does a better job

16
sounddemo.ReadSource(channel1_in, channel2_in)

• ReadSource ( )
• Provides the input sound signal from the two
  channels of the A/D
• This function will wait for an audio interrupt
  to place the A2D values into a known location,
  and then returns those values to you
• In LOCAL_AUDIOSOURCE mode, This function will
  wait for an audio interrupt then return audio
  samples from an internal generated tune.
• Note if your code to process the audio signal
  is too slowly, then an interrupt (or many
  interrupts) will have already occurred, and
  ReadSource( ) will return immediately. There is
  NO WAY to recover missed samples. You will hear
  sound distortion if many samples are missed

17
sounddemo.WriteSource(leftchannel_out,
rightchannel_out)

• WriteSource( ) simply places your values into a
  known location. When an interrupt occurs, these
  values will be sent to the D2A automatically.
• NOTE there is no check to see whether the
  previous values have been sent to the D2A.
  Therefore we need to write code of the form
• while (ReadSource (left, Right))
• ProcessSound(left, right)
• WriteSource(left, right)
• WriteSource( ) will be used during Lab. 1 Part 1

18
VolumeControl(channel1_in, channel2_in,

sounddemo)

• You will need earphones for the labs.
• WARNING - Depending on the quality of your
  ear-phones, and the quality of your coding, it is
  very simply to have a sound that is too loud and
  potentially damaging to your ears. DONT start
  running the code with the ear-phones on your
  ears. Run the code, adjust the volume, and then
  place the earphones on your ears
• VolumeControl( ) is a simply way of adjusting the
  output sound volume

19
Interrupt Handling

• sounddemo.Stop_AudioInterrupts( )
• Your code here
• sounddemo.Start_AudioInterrupts( )
• You cant single step (debug) your code when the
  interrupts are running.
• Note these functions are not working at the
  moment on the TigerSHARC.
• However this is not a real issue as the Test
  Driven Development environment provides an easier
  way to test your code without the necessity of
  having interrupts
• Once your functions have been proven to work
  (e.g. Lab. 1, Part 1), then you can add them to
  the audio program (e.g. Lab. 1, Part 2).
• If your code is so bad that you have to single
  step through it then consider using the
  equivalent of rm . and start again

20
Is anything actually happening?

• if (!sounddemo.DoNotProcess())
• ProcessSound(channel1_in, channel2_in,
  leftchannel_out,
  rightchannel_out, sounddemo)
• else
• leftchannel_out channel1_in
  rightchannel_out channel2_in
• By pressing button FLAG1 you can cause the sound
  to be passed directly to the audio output without
  processing (e.g. Lab. 1 Tutorial 1)
• Since the evaluation board has two processors
  then you will need to use FLAG1-A or
  FLAG1-B depending on which processor your code is
  running
• Note loading the code, holding FLAG1 down while
  the code starts up automatically switches between
  LOCAL and CODEC input modes, so you can switch
  without having to recompile each time

21
Software radio part of Lab 1Modified main( )
int main () // int source_selection
AUDIO_SOURCE_DEMO int source_selection
INTERNAL_SOFTWARE_RADIO_SO
URCE_DEMO if (source_selection
AUDIO_SOURCE_DEMO) AudioSourceDemo( ) else if
(source_selection
INTERNAL_SOFTWARE_RADIO_SOURCE_DEMO) Interna
lSoftwareRadioSourceDemo( ) else puts
("Unknown source selection") return 0
22
Software Radio Demo
while (WaitAMSignal(AMsignal, sounddemo))
if (!sounddemo.DoNotProcess())
ExamineSignal(AMsignal, 0, 4000) // Incoming
signal // Choose which "radio station" you want
to hear // MultiplyByReference(AMsignal,
carrier_frequency0) // ExamineSignal(AMsignal,
0, 4000) // IFstage_low_pass_filter(AMsignal,
filter_coefficients, FILTER_LENGTH) // ExamineSig
nal(AMsignal, 0, 4000) // RectifySignal(channel1
_in, channel2_in, AMsignal) // ExamineSignal(cha
nnel1_in, 0, 4000) // Audio_low_pass_filter(
channel1_in, channel2_in, leftchannel_out, //
rightchannel_out,
filter_coefficients, filter_coefficients,
FILTER_LENGTH) // ExamineSignal(leftchannel_out,
0, 4000) // DCremoval(leftchannel_out,
rightchannel_out) // ExamineSignal(leftchannel_o
ut, 0, 4000)
23
Software Radio Demo
while (WaitAMSignal(AMsignal, sounddemo))
if (!sounddemo.DoNotProcess())
// ExamineSignal(AMsignal, 0, 4000) //
Incoming signal // Choose which "radio station"
you want to hear MultiplyByReference(AMsignal,
carrier_frequency0) ExamineSignal(AMsignal,
0, 4000) // IFstage_low_pass_filter(AMsignal,
filter_coefficients, FILTER_LENGTH) // ExamineSig
nal(AMsignal, 0, 4000) // RectifySignal(channel1
_in, channel2_in, AMsignal) // ExamineSignal(cha
nnel1_in, 0, 4000) // Audio_low_pass_filter(
channel1_in, channel2_in, leftchannel_out, //
rightchannel_out,
filter_coefficients, filter_coefficients,
FILTER_LENGTH) // ExamineSignal(leftchannel_out,
0, 4000) // DCremoval(leftchannel_out,
rightchannel_out) // ExamineSignal(leftchannel_o
ut, 0, 4000)
24
Software Radio Demo
while (WaitAMSignal(AMsignal, sounddemo))
if (!sounddemo.DoNotProcess())
// ExamineSignal(AMsignal, 0, 4000) //
Incoming signal // Choose which "radio station"
you want to hear MultiplyByReference(AMsignal,
carrier_frequency0) // ExamineSignal(AMsignal,
0, 4000) IFstage_low_pass_filter(AMsignal,
filter_coefficients, FILTER_LENGTH) ExamineSigna
l(AMsignal, 0, 4000) // RectifySignal(channel1_i
n, channel2_in, AMsignal) // ExamineSignal(chann
el1_in, 0, 4000) // Audio_low_pass_filter(ch
annel1_in, channel2_in, leftchannel_out, //
rightchannel_out,
filter_coefficients, filter_coefficients,
FILTER_LENGTH) // ExamineSignal(leftchannel_out,
0, 4000) // DCremoval(leftchannel_out,
rightchannel_out) // ExamineSignal(leftchannel_o
ut, 0, 4000)
25
Software Radio Demo
while (WaitAMSignal(AMsignal, sounddemo))
if (!sounddemo.DoNotProcess())
// ExamineSignal(AMsignal, 0, 4000) //
Incoming signal // Choose which "radio station"
you want to hear MultiplyByReference(AMsignal,
carrier_frequency0) // ExamineSignal(AMsignal,
0, 4000) IFstage_low_pass_filter(AMsignal,
filter_coefficients, FILTER_LENGTH) // ExamineSig
nal(AMsignal, 0, 4000) RectifySignal(channel1_i
n, channel2_in, AMsignal) // ExamineSignal(chann
el1_in, 0, 4000) Audio_low_pass_filter(chan
nel1_in, channel2_in, leftchannel_out,
rightchannel_out, filter_coefficients,
filter_coefficients, FILTER_LENGTH) ExamineSigna
l(leftchannel_out, 0, 4000) // DCremoval(left
channel_out, rightchannel_out) // ExamineSignal(
leftchannel_out, 0, 4000)
26
Software Radio Demo
while (WaitAMSignal(AMsignal, sounddemo))
if (!sounddemo.DoNotProcess())
// ExamineSignal(AMsignal, 0, 4000) //
Incoming signal // Choose which "radio station"
you want to hear MultiplyByReference(AMsignal,
carrier_frequency0) // ExamineSignal(AMsignal,
0, 4000) IFstage_low_pass_filter(AMsignal,
filter_coefficients, FILTER_LENGTH) // ExamineSig
nal(AMsignal, 0, 4000) RectifySignal(channel1_i
n, channel2_in, AMsignal) // ExamineSignal(chann
el1_in, 0, 4000) Audio_low_pass_filter(chan
nel1_in, channel2_in, leftchannel_out,
rightchannel_out, filter_coefficients,
filter_coefficients, FILTER_LENGTH) // ExamineSig
nal(leftchannel_out, 0, 4000) DCremoval(left
channel_out, rightchannel_out) ExamineSignal(le
ftchannel_out, 0, 4000)
27
Concepts tackled

• Differences between processor and evaluation
  board
• Functionality present of TigerSHARC evaluation
  board
• Accessing the A2D and D2A in an easy way needed
  for all Labs.