87 lines
1.7 KiB
Python
87 lines
1.7 KiB
Python
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#!/usr/bin/env python3
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## Output data through raspberry pi LED blinking. Use "echo mmc0 >/sys/class/leds/led0/trigger" to restore normal behavior.
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import sys
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import socket
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import subprocess
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import time
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import argparse
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def morse(s):
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code = '_etianmsurwdkgohvf_l_pjbxcyzq__54_3___2__+____16=/_____7___8_90'
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def e(l):
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i = code.find(l)
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v = ''
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while i > 0:
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v = '-.'[i % 2] + v
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i = (i - 1) // 2
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return v or '/'
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return map(e, s)
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def _blink(t):
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subprocess.call(['echo 1 > /sys/class/leds/led0/brightness'], shell=True)
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time.sleep(t)
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subprocess.call(['echo 0 > /sys/class/leds/led0/brightness'], shell=True)
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def dot(t):
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_blink(t)
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def dash(t):
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_blink(t * 3)
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def pause(t):
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time.sleep(t * 3)
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def main():
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parser = argparse.ArgumentParser(
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description='Output stdin to raspberry led0 in morse')
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parser.add_argument('text', nargs='?', help='text to output')
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parser.add_argument(
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'-u', '--unit',
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type=float, default=0.2,
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help='time unit in seconds')
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parser.add_argument(
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'-i', '--ip',
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action='store_true', default=False,
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help='output local ip address')
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parser.add_argument(
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'-b', '--bin',
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action='store_true', default=False,
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help='output using binary encoding')
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args = parser.parse_args()
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if args.text:
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text = args.text
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elif not sys.stdin.isatty():
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text = sys.stdin.read()
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elif args.ip:
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text = socket.gethostbyname(socket.getfqdn())
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else:
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parser.error('the following arguments are required: text')
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if args.bin:
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data = (bin(i)[2::] for i in str.encode(text))
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conv = binary_conv
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else:
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data = morse(text)
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conv = morse_conv
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for i in data:
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for k in i:
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conv[k](args.unit)
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time.sleep(args.unit)
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morse_conv = {'.': dot, '-': dash, '/': pause}
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binary_conv = {'0': dot, '1': dash}
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if __name__ == '__main__':
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main()
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