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# This example borrows a CircuitPython hsv_to_rgb function to cycle through some rainbows on Pico Display's screen and RGB LED . If you're into rainbows, HSV (Hue, Saturation, Value) is very useful!
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import utime
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import picodisplay as display # Comment this line out to use PicoDisplay2
# import picodisplay2 as display # Uncomment this line to use PicoDisplay2
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# Set up and initialise Pico Display
buf = bytearray ( display . get_width ( ) * display . get_height ( ) * 2 )
display . init ( buf )
display . set_backlight ( 0.8 )
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# From CPython Lib/colorsys.py
def hsv_to_rgb ( h , s , v ) :
if s == 0.0 :
return v , v , v
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i = int ( h * 6.0 )
f = ( h * 6.0 ) - i
p = v * ( 1.0 - s )
q = v * ( 1.0 - s * f )
t = v * ( 1.0 - s * ( 1.0 - f ) )
i = i % 6
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if i == 0 :
return v , t , p
if i == 1 :
return q , v , p
if i == 2 :
return p , v , t
if i == 3 :
return p , q , v
if i == 4 :
return t , p , v
if i == 5 :
return v , p , q
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h = 0
while True :
h + = 1
r , g , b = [ int ( 255 * c ) for c in hsv_to_rgb ( h / 360.0 , 1.0 , 1.0 ) ] # rainbow magic
display . set_led ( r , g , b ) # Set LED to a converted HSV value
display . set_pen ( r , g , b ) # Set pen to a converted HSV value
display . clear ( ) # Fill the screen with the colour
display . set_pen ( 0 , 0 , 0 ) # Set pen to black
display . text ( " pico disco! " , 10 , 10 , 240 , 6 ) # Add some text
display . update ( ) # Update the display
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utime . sleep ( 1.0 / 60 )