86 lines
3.2 KiB
Python
86 lines
3.2 KiB
Python
# Circuit Playground Express CircuitPython Morse Code Flasher
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# This is meant to work with the Circuit Playground Express board:
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# https://www.adafruit.com/product/3333
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# Needs the NeoPixel module installed:
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# https://github.com/adafruit/Adafruit_CircuitPython_NeoPixel
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# Author: Collin Cunningham
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# License: MIT License (https://opensource.org/licenses/MIT)
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import time
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import board
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import neopixel
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# Configuration:
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message = 'SOS' # Message to display (capital letters and numbers only)
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dot_length = 0.15 # Duration of one Morse dot
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dash_length = (dot_length * 3.0) # Duration of one Morse dash
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symbol_gap = dot_length # Duration of gap between dot or dash
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character_gap = (dot_length * 3.0) # Duration of gap between characters
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flash_color = (255, 0, 0) # Color of the morse display.
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brightness = 0.5 # Display brightness (0.0 - 1.0)
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morse = [('A', '.-'), ('B', '-...'), ('C', '-.-.'), ('D', '-..'), ('E', '.'), ('F', '..-.'), ('G', '--.'), ('H', '....'), ('I', '..'), ('J', '.---'), ('K', '-.-'), ('L', '.-..'), ('M', '--'), ('N', '-.'), ('O', '---'), ('P', '.--.'), ('Q', '--.-'), ('R', '.-.'), ('S', '...'), ('T', '-'), ('U', '..-'), ('V', '...-'), ('W', '.--'), ('X', '-..-'), ('Y', '-.--'), ('Z', '--..'), ('0', '-----'), ('1', '.----'), ('2', '..---'), ('3', '...--'), ('4', '....-'), ('5', '.....'), ('6', '-....'), ('7', '--...'), ('8', '---..'), ('9', '----.')]
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# Define a class that represents the morse flasher.
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class MorseFlasher:
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def __init__(self, color=(255,255,255)):
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#set the color adjusted for brightness
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self._color = (int(color[0]*brightness), int(color[1]*brightness), int(color[2]*brightness))
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def light(self, on=True):
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if on:
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pixels.fill(self._color)
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else:
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pixels.fill((0,0,0))
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pixels.show()
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def showDot(self):
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self.light(True)
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time.sleep(dot_length)
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self.light(False)
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time.sleep(symbol_gap)
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def showDash(self):
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self.light(True)
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time.sleep(dash_length)
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self.light(False)
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time.sleep(symbol_gap)
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def encode(self, str):
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output = ""
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#iterate through string's characters
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for c in str:
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#find morse code for a character
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for x in morse:
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if x[0] == c:
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#add code to output
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output += x[1]
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# add a space in between characters
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output += " "
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#save complete morse code output to display
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self.display(output)
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def display(self, code=".-.-.- "):
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# iterate through morse code symbols
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for c in code:
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# show a dot
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if c == ".":
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self.showDot()
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# show a dash
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elif c == "-":
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self.showDash()
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# show a gap
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elif c == " ":
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time.sleep(character_gap)
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# Initialize NeoPixels
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pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, auto_write=False)
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pixels.fill((0, 0, 0))
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pixels.show()
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# Create a morse flasher object.
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flasher = MorseFlasher(flash_color)
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# Main loop will run forever
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while True:
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flasher.encode(message)
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