242 lines
8.5 KiB
Python
242 lines
8.5 KiB
Python
# The MIT License (MIT)
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#
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# Copyright (c) 2017 Dave Astels for ZombieWizard
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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"""
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`dotstar_featherwing` - CircuitPython support for the 6x12 DotStar FeatherWing
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====================================================
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Provides a simple way to use the DotStar Feather Wing to display text, images, and animation.
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* Author(s): Dave Astels
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"""
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import board
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import adafruit_dotstar
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import time
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class DotstarFeatherwing:
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"""Test, Image, and Animation support for the DotStar featherwing"""
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blank_stripe = [(0, 0, 0),
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(0, 0, 0),
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(0, 0, 0),
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(0, 0, 0),
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(0, 0, 0),
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(0, 0, 0)]
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"""A blank stripe, used internally to separate characters as they are shifted onto the display."""
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font_3 = {' ': [ 0, 0, 0],
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'A': [62, 05, 62],
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'B': [63, 37, 26],
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'C': [30, 33, 18],
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'D': [63, 33, 30],
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'E': [63, 37, 33],
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'F': [63, 5, 1],
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'G': [30, 41, 26],
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'H': [63, 4, 63],
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'I': [33, 63, 33],
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'J': [33, 31, 1],
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'K': [63, 4, 59],
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'L': [63, 32, 32],
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'M': [63, 2, 63],
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'N': [63, 12, 63],
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'O': [30, 33, 30],
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'P': [63, 5, 2],
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'Q': [30, 33, 62],
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'R': [63, 5, 58],
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'S': [18, 37, 26],
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'T': [ 1, 63, 1],
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'U': [31, 32, 63],
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'V': [31, 32, 31],
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'W': [63, 16, 63],
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'X': [59, 4, 59],
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'Y': [ 3, 60, 3],
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'Z': [49, 45, 35],
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'0': [30, 33, 30],
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'1': [34, 63, 32],
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'2': [50, 41, 38],
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'3': [33, 37, 26],
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'4': [ 7, 4, 63],
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'5': [23, 37, 25],
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'6': [30, 41, 25],
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'7': [49, 9, 7],
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'8': [26, 37, 26],
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'9': [38, 41, 30],
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'!': [ 0, 47, 0],
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'?': [ 2, 41, 6],
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'.': [ 0, 32, 0],
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'-': [ 8, 8, 8],
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'_': [32, 32, 32],
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'+': [ 8, 28, 8],
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'/': [48, 12, 3],
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'*': [20, 8, 20],
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'=': [20, 20, 20],
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'UNKNOWN': [63, 33, 63] }
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"""A sample font that uses 3 pixel wide characters."""
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def __init__(self, clock, data, brightness=1.0):
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"""Create an interface for the display.
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:param pin clock: The clock pin for the featherwing
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:param pin data: The data pin for the featherwing
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:param float brightness: Optional brightness (0.0-1.0) that defaults to 1.0
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"""
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self.rows = 6
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self.columns = 12
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self.display = adafruit_dotstar.DotStar(clock, data, self.rows * self.columns, brightness, False)
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def shift_into_left(self, stripe):
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""" Shift a column of pixels into the left side of the display.
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:param [int] stripe: A column of pixel colours
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"""
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for r in range(self.rows):
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rightmost = r * self.columns
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for c in range(self.columns - 1):
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self.display[rightmost + c] = self.display[rightmost + c + 1]
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self.display[rightmost + self.columns - 1] = stripe[r]
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self.display.show()
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def shift_into_right(self, stripe):
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""" Shift a column of pixels into the rightside of the display.
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:param [int] stripe: A column of pixel colours
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"""
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for r in range(self.rows):
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leftmost = ((r + 1) * self.columns) - 1
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for c in range(self.columns - 1):
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self.display[leftmost - c] = self.display[(leftmost - c) -1]
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self.display[(leftmost - self.columns) + 1] = stripe[r]
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self.display.show()
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def number_to_pixels(self, x, colour):
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"""Convert an integer (0..63) into an array of 6 pixels.
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:param int x: integer to convert into binary pixel values; LSB is topmost.
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:param (int) colour: the colour to set "on" pixels to
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"""
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val = x
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pixels = []
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for b in range(self.rows):
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if val & 1 == 0:
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pixels.append((0, 0, 0))
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else:
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pixels.append(colour)
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val = val >> 1
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return pixels
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def character_to_numbers(self, font, char):
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"""Convert a letter to the sequence of column values to display.
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:param {char -> [int]} font: the font to use to convert characters to glyphs
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:param char letter: the char to convert
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"""
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return font[letter]
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def clear(self):
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"""Clear the display.
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Does NOT update the LEDs
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"""
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self.display.fill((0,0,0))
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def shift_in_character(self, font, c, colour=(0x00, 0x40, 0x00), delay=0.2):
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"""Shifts a single character onto the display from the right edge.
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:param {char -> [int]} font: the font to use to convert characters to glyphs
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:param char c: the char to convert
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:param (int) colour: the color to use for each pixel turned on
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:param float delay: the time to wait between shifting in columns
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"""
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if c.upper() in font:
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matrix = self.character_to_numbers(font, c.upper())
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else:
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matrix = self.character_to_numbers(font, 'UNKNOWN')
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for stripe in matrix:
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self.shift_into_right(self.number_to_pixels(stripe, colour))
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time.sleep(delay)
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self.shift_into_right(self.blank_stripe)
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time.sleep(delay)
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def shift_in_string(self, font, s, colour=(0x00, 0x40, 0x00), delay=0.2):
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"""Shifts a string onto the display from the right edge.
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:param {char -> [int]} font: the font to use to convert characters to glyphs
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:param string s: the char to convert
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:param (int) colour: the color to use for each pixel turned on
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:param float delay: the time to wait between shifting in columns
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"""
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for c in s:
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self.shift_in_character(font, c, colour, delay)
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# Display an image
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def display_image(self, image, colour):
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"""Display an mono-coloured image.
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:param [string] image: the textual bitmap, 'X' for set pixels, anything else for others
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:param (int) colour: the colour to set "on" pixels to
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"""
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self.display_coloured_image(image, {'X': colour})
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def display_coloured_image(self, image, colours):
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"""Display an multi-coloured image.
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:param [string] image: the textual bitmap, character are looked up in colours for the
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corresponding pixel colour, anything not in the map is off
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:param {char -> [int]} colours: a map of characters in the image data to colours to use
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"""
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for r in range(self.rows):
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for c in range(self.columns):
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index = r * self.columns + ((self.columns - 1) - c)
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key = image[r][c]
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if key in colours:
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self.display[index] = colours[key]
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else:
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self.display[index] = (0, 0, 0)
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self.display.show()
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def display_animation(self, animation, colours, delay=0.1):
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"""Display a multi-coloured animation.
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:param [[string]] animation: a list of textual bitmaps, each as described in display_coloured_image
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:param {char -> [int]} colours: a map of characters in the image data to colours to use
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:param float delay: the amount of time (seconds) to wait between frames
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"""
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self.clear()
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while True:
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for frame in animation:
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self.display_coloured_image(frame, colours)
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time.sleep(delay)
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