kopia lustrzana https://github.com/pimoroni/pimoroni-pico
73 wiersze
2.1 KiB
Python
73 wiersze
2.1 KiB
Python
# This example cycles through some rainbows on Pico Display's screen and RGB LED, using the HSV colour model.
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# (If you're into rainbows, HSV (Hue, Saturation, Value) is very useful)
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# We're using a RAM intensive 64K colour palette here to get a nice smooth colour transition.
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# If you have a Display Pack 2.0" or 2.8" use DISPLAY_PICO_DISPLAY_2 instead of DISPLAY_PICO_DISPLAY
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import time
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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY, PEN_RGB565
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from pimoroni import RGBLED
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display = PicoGraphics(display=DISPLAY_PICO_DISPLAY, pen_type=PEN_RGB565, rotate=0)
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display.set_backlight(0.8)
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# set up constants for drawing
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WIDTH, HEIGHT = display.get_bounds()
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BLACK = display.create_pen(0, 0, 0)
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# what size steps to take around the colour wheel
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OFFSET = 0.0025
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# variable to keep track of the hue
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h = 0.0
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# Set up the RGB LED For Display Pack and Display Pack 2.0":
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led = RGBLED(6, 7, 8)
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# For Display Pack 2.8" uncomment the following line and comment out the line above:
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# led = RGBLED(26, 27, 28)
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# From CPython Lib/colorsys.py
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def hsv_to_rgb(h, s, v):
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if s == 0.0:
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return v, v, v
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i = int(h * 6.0)
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f = (h * 6.0) - i
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p = v * (1.0 - s)
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q = v * (1.0 - s * f)
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t = v * (1.0 - s * (1.0 - f))
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i = i % 6
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if i == 0:
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return v, t, p
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if i == 1:
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return q, v, p
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if i == 2:
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return p, v, t
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if i == 3:
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return p, q, v
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if i == 4:
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return t, p, v
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if i == 5:
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return v, p, q
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while True:
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# increment the hue each time round the loop
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h += OFFSET
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# The LED needs to be set using RGB values, so convert HSV to RGB using the hsv_to_rgb() function above
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r, g, b = [int(255 * c) for c in hsv_to_rgb(h, 1.0, 1.0)]
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led.set_rgb(r, g, b)
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# Fill the screen with the chosen hue, we can use PicoGraphics' built in HSV pen function for this
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RAINBOW = display.create_pen_hsv(h, 1.0, 1.0)
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display.set_pen(RAINBOW)
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display.clear()
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# Draw some black text
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display.set_pen(BLACK)
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display.text("pico disco!", 10, 10, 240, 6)
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display.update()
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time.sleep(1.0 / 60)
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