LAFL

LAFL

Large Array Foveated Listening

The code base for both the Python script running on the RPI and on a laptop

Things to do

• Fix graph big/little bit mixup -- Fixed 2/27/24 (Both need to be set to big/MSB first) -- Fixed again on 3/27/24 with 12 signals it switched to little/LSB

• expand graph to all 12 signals

  • Code on both the pi and laptop
  • Done 3/27/24

• Implement FFT code

  • A step for noise reduction -- Done for one mic 3/24/24
    • still needs real test
  • common mode rejection
    • Implemented but might not be useful
      • Time will tell

• Filtering code -- Cole

  • Filter types

• Difference of phase code -- Casie && Possibly Tyler

  • I don't even know what goes into this
  • also need code to auto align microphone offsets in code

• Signal saving and replay with HW emulator

  • Done 3/27/24

• Box -- Robert

FOR LATER EXPLORATION

• UI design

• Possible way to speed up code if we need full 50kHz or just more than we have

  • Seems counter intuitive but we use a delay
  • So instead of sending data at a rate of 50khz we save up a seconds worth of data and then send that as a bigger packet
  • This might speed up the system b/c most of the time it taken with the network protocol.
    • So less protocol = more time

1. Setting up Github Desktop

• I need user names so I can make you a contributor
• Clone from URL https://github.com/MattRSON/LAFL
• Set branch to current task
  • If you try to push to main it will tell you no.
  • Only push to the current task
  • Once the task is done I will move it to main
• Any change in the files will show in github desktop
  • They can then be committed and pushed

2. VS code

• Install python 3.12 from windows store
• Install python extension in vs code
• Install Live Share extension in vs code
• Open LAFL folder in documents/github
• SPI-Network runs on the Rpi
• LaptopPython runs on laptop
• Any test codes that you want to write can be thrown in the TestScripts folder

3. Running Code

• If a terminal is now open within Vs Code hit Terminal/New Terminal at the top
• From this hit the small plus in the top right of the terminal window (Bottom right of the screen)
  • One of these terminals will be used to run code on the laptop
  • The other will be used to run code on the Rpi
• To run the code on the laptop side type 'python LaptopPython.py'
  • 'python' Tells it to run as a python file
  • 'LaptopPython.py' in the name of the script
  • This will only work if the Rpi code is running
  • To stop the code hit the x on the window
• To run the code on the Rpi side we first need to connect to it (Ignore for HardwareEmulator)
  • in the unused terminal type 'ssh pi@LAFL'
    • This will connect to it as user 'pi' to computer 'LAFL'
  • The password is LAFLTSMCR
  • Then to run the code we need to ender the LAFL folder
  • and lastly type 'sudo python SPI-Network.py'
    • The code will show nothing, this is normal
    • A warning might pop up. In can be ignored
    • To stop the code hit 'ctrl C'
• To run the hardware emulator
  • Set the host in the LaptopPython to the number based one
  • To run the code type 'python HardwareEmulator.py'

4. Navigating in the command line

• Changing folder
  • 'cd FOLDERNAME' will go to that folder
  • 'cd ..' will go back one folder
  • 'ls' will list the folders and files in a folder
• Running things
  • 'sudo' Gives admin privilege needed for some commands
• Shutting down the pi
  • 'sudo shutdown now' shuts it down so its safe to unplug