raspi-gpio-morse.py

# encoding:utf-8
import gpiozero
import time
import sys

class Broadcast:
    def __init__(self, gpio):
        self.buzzer = gpiozero.Buzzer(gpio)
        self.unit = 0.04
        self.breath = self.unit * 0.5
        self.gap_table = {
            ".": self.unit * 1,
            "-": self.unit * 3,
            "/": self.unit * 7,
        } 

    def beep(self, gap):
        self.buzzer.on()
        time.sleep(gap)
        self.buzzer.off()
        time.sleep(self.breath)

    def emit(self, data):
        for i in data:
            sys.stdout.write(i)
            sys.stdout.flush()
            self.beep(self.gap_table[i])

def encode(data):
    table = {
        'A': '01' ,
        'B': '1000' ,
        'C': '1010' ,
        'D': '100' ,
        'E': '0' ,
        'F': '0010' ,
        'G': '110' ,
        'H': '0000' ,
        'I': '00' ,
        'J': '0111' ,
        'K': '101' ,
        'L': '0100' ,
        'M': '11' ,
        'N': '10' ,
        'O': '111' ,
        'P': '0110' ,
        'Q': '1101' ,
        'R': '010' ,
        'S': '000' ,
        'T': '1' ,
        'U': '001' ,
        'V': '0001' ,
        'W': '011' ,
        'X': '1001' ,
        'Y': '1011' ,
        'Z': '1100' ,
        '0': '11111' ,
        '1': '01111' ,
        '2': '00111' ,
        '3': '00011' ,
        '4': '00001' ,
        '5': '00000' ,
        '6': '10000' ,
        '7': '11000' ,
        '8': '11100' ,
        '9': '11110' ,
        '.': '010101' ,
        ',': '110011' ,
        '?': '001100' ,
        "'": '011110' ,
        '!': '101011' ,
        '/': '10010' ,
        '(': '10110' ,
        ')': '101101' ,
        '&': '01000' ,
        ':': '111000' ,
        ';': '101010' ,
        '=': '10001' ,
        '+': '01010' ,
        '-': '100001' ,
        '_': '001101' ,
        '"': '010010' ,
        '$': '0001001' ,
        '@': '011010' ,
    }
    unicodes = data.decode("utf-8")
    result = []
    for i in unicodes:
        if i.upper() in table.keys():
            result.append(table[i.upper()])
            continue
        u = ""
        for j in i.encode("utf-16-be"):
            k = bin(ord(j))[2:].rjust(8, "0")
            u += k
        result.append(u.lstrip("0"))
    return "/".join(result).replace("0", ".").replace("1", "-")

def main():
    bc = Broadcast(gpio=17)
    data = encode(sys.argv[1])
    bc.emit(data)


if __name__ == "__main__":
    main()