TestLightDrivenOscillation

1 collaborator

Corey Brady (Author)

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extensions [ gpio ]

turtles-own [ velocity acceleration ]

globals 
[ 
  digitals
  analogs
  last-level
  strip
  gopwm
] 

to startup
  setup
end 

to setup
  
  ca
  create-turtles 1 [ set shape "circle" set size 3 set color red set velocity 1 set heading 90]
  set gopwm true
  set digitals n-values 19 [ 0 ]
  set analogs n-values 6 [ 0 ]
  reset-ticks
  parse gpio:all-info
end 

to parse [ lists ]
  set digitals item 0 lists
  set analogs item 1 lists
end 

to refresh
  parse gpio:all-info
end 

to-report gpio [ n ]
  report item n digitals
end 

to-report adc [ n ]
  report item n analogs
end 

to go
  every .1
  [
    refresh
    ask turtles [ 
      let sgn -1 
      if xcor > 0 [ set sgn 1 ]
      set acceleration -1 * light-level * ( sgn )
      set velocity velocity + acceleration 
      ]
    ask turtles [ fd velocity  adjust-light abs xcor / max-pxcor ]
    
    tick
  ]
end 


;;from experiment, i'm getting a range between 120 and 220 for the light meter
;;these values can be chanmged

to-report light-level
  let minv 120
  let maxv 220
  let val ((adc 4) - minv) / (maxv - minv)
  if (val > 1) [ report 1 ]
  if (val < 0) [ report 0 ]
  report val
end 

to adjust-light [ percent ]
  let minv 0
  let maxv 128
  let pwm-level round ( minv + percent * (maxv - minv) )
  if (pwm-level != last-level) [
     let resp gpio:pwm-set-level (word which-pwm) (word pwm-level)
     set last-level pwm-level
  ]
end

There is only one version of this model, created over 10 years ago by Corey Brady.

Attached files

File	Type	Description	Last updated
TestLightDrivenOscillation.png	preview	Preview for 'TestLightDrivenOscillation'	over 10 years ago, by Corey Brady	Download

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