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Merge pull request #973 from pimoroni/examples/pico-display-2-8
Pico Display 2.8": Update examples
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‎README.md‎

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@@ -80,10 +80,11 @@ We also maintain a C++/CMake boilerplate with GitHub workflows configured for te
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* Pico Unicorn Pack - https://shop.pimoroni.com/products/pico-unicorn-pack
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* Pico Audio Pack (C++ only) - https://shop.pimoroni.com/products/pico-audio-pack
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* Pico Wireless Pack - https://shop.pimoroni.com/products/pico-wireless-pack
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* Pico Display 2.0 - https://shop.pimoroni.com/products/pico-display-pack-2-0
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* Pico Display 2.0" - https://shop.pimoroni.com/products/pico-display-pack-2-0
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* Pico Enviro+ Pack - https://shop.pimoroni.com/products/pico-enviro-pack
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* Pico Inky Pack - https://shop.pimoroni.com/products/pico-inky-pack
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* Pico GFX Pack - https://shop.pimoroni.com/products/pico-gfx-pack
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* Pico Display 2.8" - https://shop.pimoroni.com/products/pico-display-pack-2-8
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## SHIMs
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‎micropython/examples/pico_display/balls_demo.py‎

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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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import random
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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY, PEN_P8

‎micropython/examples/pico_display/basic_qrcode.py‎

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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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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY
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import qrcode
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‎micropython/examples/pico_display/button_test.py‎

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# This example shows you a simple, non-interrupt way of reading Pico Display's buttons with a loop that checks to see if buttons are pressed.
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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 pimoroni import Button
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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY, PEN_P4
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from pimoroni import RGBLED
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# We're only using a few colours so we can use a 4 bit/16 colour palette and save RAM!
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display = PicoGraphics(display=DISPLAY_PICO_DISPLAY, pen_type=PEN_P4, rotate=0)
@@ -15,6 +17,12 @@
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button_x = Button(14)
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button_y = Button(15)
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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 line below and comment out the line above:
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# led = RGBLED(26, 27, 28)
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WHITE = display.create_pen(255, 255, 255)
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BLACK = display.create_pen(0, 0, 0)
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CYAN = display.create_pen(0, 255, 255)
@@ -26,6 +34,7 @@
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# sets up a handy function we can call to clear the screen
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def clear():
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display.set_pen(BLACK)
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led.set_rgb(0, 0, 0)
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display.clear()
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display.update()
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@@ -37,33 +46,38 @@ def clear():
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if button_a.read(): # if a button press is detected then...
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clear() # clear to black
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display.set_pen(WHITE) # change the pen colour
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led.set_rgb(255, 255, 255) # set the LED colour to match
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display.text("Button A pressed", 10, 10, 240, 4) # display some text on the screen
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display.update() # update the display
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time.sleep(1) # pause for a sec
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clear() # clear to black again
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elif button_b.read():
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clear()
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display.set_pen(CYAN)
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led.set_rgb(0, 255, 255)
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display.text("Button B pressed", 10, 10, 240, 4)
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display.update()
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time.sleep(1)
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clear()
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elif button_x.read():
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clear()
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display.set_pen(MAGENTA)
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led.set_rgb(255, 0, 255)
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display.text("Button X pressed", 10, 10, 240, 4)
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display.update()
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time.sleep(1)
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clear()
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elif button_y.read():
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clear()
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display.set_pen(YELLOW)
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led.set_rgb(255, 255, 0)
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display.text("Button Y pressed", 10, 10, 240, 4)
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display.update()
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time.sleep(1)
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clear()
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else:
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display.set_pen(GREEN)
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led.set_rgb(0, 255, 0)
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display.text("Press any button!", 10, 10, 240, 4)
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display.update()
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time.sleep(0.1) # this number is how frequently the Pico checks for button presses

‎micropython/examples/pico_display/pride_stripes.py‎

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# A customisable Pride flag. (Look in the Tufty 2040 examples for a name badge version!)
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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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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY
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‎micropython/examples/pico_display/rainbow.py‎

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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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# 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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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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led = RGBLED(6, 7, 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):
@@ -39,16 +51,22 @@ def hsv_to_rgb(h, s, v):
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return v, p, q
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h = 0
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while True:
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h += 1
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r, g, b = [int(255 * c) for c in hsv_to_rgb(h / 360.0, 1.0, 1.0)] # rainbow magic
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led.set_rgb(r, g, b) # Set LED to a converted HSV value
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RAINBOW = display.create_pen(r, g, b) # Create pen with converted HSV value
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display.set_pen(RAINBOW) # Set pen
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display.clear() # Fill the screen with the colour
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display.set_pen(BLACK) # Set pen to black
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display.text("pico disco!", 10, 10, 240, 6) # Add some text
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display.update() # Update the display
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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)

‎micropython/examples/pico_display/rainbow_wheel.py‎

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# A spinny rainbow wheel. Change up some of the constants below to see what happens.
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import math
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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY_2
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# Constants for drawing
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INNER_RADIUS = 40
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OUTER_RADIUS = 120
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NUMBER_OF_LINES = 24
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HUE_SHIFT = 0.02
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ROTATION_SPEED = 2
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LINE_THICKNESS = 2
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# Set up the display
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graphics = PicoGraphics(display=DISPLAY_PICO_DISPLAY_2)
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WIDTH, HEIGHT = graphics.get_bounds()
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BLACK = graphics.create_pen(0, 0, 0)
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# Variables to keep track of rotation and hue positions
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r = 0
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t = 0
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while True:
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graphics.set_pen(BLACK)
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graphics.clear()
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for i in range(0, 360, 360 // NUMBER_OF_LINES):
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graphics.set_pen(graphics.create_pen_hsv((i / 360) + t, 1.0, 1.0))
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# Draw some lines, offset by the rotation variable
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graphics.line(int(WIDTH / 2 + math.cos(math.radians(i + r)) * INNER_RADIUS),
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int(HEIGHT / 2 + math.sin(math.radians(i + r)) * INNER_RADIUS),
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int(WIDTH / 2 + math.cos(math.radians(i + 90 + r)) * OUTER_RADIUS),
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int(HEIGHT / 2 + math.sin(math.radians(i + 90 + r)) * OUTER_RADIUS),
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LINE_THICKNESS)
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graphics.update()
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r += ROTATION_SPEED
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t += HUE_SHIFT

‎micropython/examples/pico_display/ram_test.py‎

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# Shows the available RAM. PEN_RGB332 is an 8 bit, fixed 256 colour palette which conserves your RAM.
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# Try switching the pen_type to PEN_RGB565 (16 bit, 65K colour) and see the difference!
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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 gc
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import time
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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY, PEN_RGB332
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# PEN_RGB332 is an 8 bit, fixed 256 colour palette which conserves your RAM.
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# Try switching the pen_type to PEN_RGB565 (16 bit, 65K colour) and see the difference!
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display = PicoGraphics(DISPLAY_PICO_DISPLAY, pen_type=PEN_RGB332, rotate=0)
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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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def free(full=False):
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# Calculates RAM usage
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return (f"Total RAM \n{T} bytes \nUnused RAM \n{F} bytes \n({P} free)")
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def hsv_to_rgb(h, s, v):
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# From CPython Lib/colorsys.py
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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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h = 0
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while True:
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h += 1
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r, g, b = [int(255 * c) for c in hsv_to_rgb(h / 360.0, 1.0, 1.0)] # rainbow magic
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h += OFFSET
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display.set_pen(BLACK)
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RAINBOW = display.create_pen(r, g, b) # Create pen with converted HSV value
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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.set_font("bitmap8")
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display.text(free(full=True), 0, 0, WIDTH, 3)
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display.update()
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time.sleep(1.0 / 60)

‎micropython/examples/pico_display/starfield.py‎

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# Travel through a Windows 3.1-esque starfield, with stars growing as they get 'closer'.
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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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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY
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import random
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# Constants to play with
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NUMBER_OF_STARS = 200
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TRAVEL_SPEED = 1.2
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STAR_GROWTH = 0.12
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# Set up our display
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graphics = PicoGraphics(display=DISPLAY_PICO_DISPLAY)
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WIDTH, HEIGHT = graphics.get_bounds()
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BLACK = graphics.create_pen(0, 0, 0)
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WHITE = graphics.create_pen(255, 255, 255)
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stars = []
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def new_star():
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# Create a new star, with initial x, y, and size
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# Initial x will fall between -WIDTH / 2 and +WIDTH / 2 and y between -HEIGHT/2 and +HEIGHT/2
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# These are relative values for now, treating (0, 0) as the centre of the screen.
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star = [random.randint(0, WIDTH) - WIDTH // 2, random.randint(0, HEIGHT) - HEIGHT // 2, 0.5]
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return star
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for i in range(0, NUMBER_OF_STARS):
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stars.append(new_star())
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while True:
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graphics.set_pen(BLACK)
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graphics.clear()
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graphics.set_pen(WHITE)
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for i in range(0, NUMBER_OF_STARS):
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# Load a star from the stars list
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s = stars[i]
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# Update x
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s[0] = s[0] * TRAVEL_SPEED
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# Update y
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s[1] = s[1] * TRAVEL_SPEED
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if s[0] <= - WIDTH // 2 or s[0] >= WIDTH // 2 or s[1] <= - HEIGHT // 2 or s[1] >= HEIGHT // 2 or s[2] >= 5:
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# This star has fallen off the screen (or rolled dead centre and grown too big!)
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# Replace it with a new one
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s = new_star()
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# Grow the star as it travels outward
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s[2] += STAR_GROWTH
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# Save the updated star to the list
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stars[i] = s
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# Draw star, adding offsets to our relative coordinates to allow for (0, 0) being in the top left corner.
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graphics.circle(int(s[0]) + WIDTH // 2, int(s[1]) + HEIGHT // 2, int(s[2]))
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graphics.update()

‎micropython/examples/pico_display/thermometer.py‎

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# This example takes the temperature from the Pico's onboard temperature sensor, and displays it on Pico Display Pack, along with a little pixelly graph.
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# It's based on the thermometer example in the "Getting Started with MicroPython on the Raspberry Pi Pico" book, which is a great read if you're a beginner!
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# This example takes the temperature from the Pico's onboard temperature sensor, and displays it on Pico Display Pack.
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# It's based on the thermometer example in the "Getting Started with MicroPython on the Raspberry Pi Pico" book.
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import machine
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import time
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from pimoroni import RGBLED
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from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY
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# set up the hardware
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# set up the display and drawing constants
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display = PicoGraphics(display=DISPLAY_PICO_DISPLAY, rotate=0)
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sensor_temp = machine.ADC(4)
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led = RGBLED(6, 7, 8)
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# set the display backlight to 50%
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display.set_backlight(0.5)
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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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WHITE = display.create_pen(255, 255, 255)
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# set up the internal temperature sensor
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sensor_temp = machine.ADC(4)
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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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conversion_factor = 3.3 / (65535) # used for calculating a temperature from the raw sensor reading
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temp_min = 10

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