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ttyio.py
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ttyio.py
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# papoon_usb: "Not Insane" USB library for STM32F103xx MCUs
# Copyright (C) 2019,2020 Mark R. Rubin
#
# This file is part of papoon_usb.
#
# The papoon_usb program is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
#
# The papoon_usb program is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty
# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# (LICENSE.txt) along with the papoon_usb program. If not, see
# <https:#www.gnu.org/licenses/gpl.html>
#!/usr/bin/env python2
import fcntl
import os
import select
import signal
import string
import sys
tty = '/dev/ttyACM0'
PER = 16
MAX = 1024
def signal_handler(sig, frame):
sys.stdout.write('\n')
sys.exit(0)
if len(sys.argv) > 1:
if sys.argv[1].startswith('/dev/tty'): tty = sys.argv[1]
elif sys.argv[1].startswith( 'tty'): tty = '/dev/' + sys.argv[1]
else: tty = '/dev/tty' + sys.argv[1]
signal.signal(signal.SIGINT, signal_handler)
read = open(tty, 'r')
writ = open(tty, 'w')
curflags = fcntl.fcntl(read.fileno(), fcntl.F_GETFL)
fcntl.fcntl(read.fileno(), fcntl.F_SETFL, curflags | os.O_NONBLOCK)
while True:
(readers, writers, exceptors) = select.select((sys.stdin, read), (), ())
if read in readers:
input = read.read(MAX)
sys.stdout.write("".join([ letter
if letter in string.printable
else '.'
for letter
in input ]))
if any([c not in string.printable for c in input]):
sys.stdout.write('\n')
ords = [ " " + letter + " "
if letter in string.printable
else "%02x " % ord(letter)
for letter
in input ]
for begin in range(0, len(ords), PER):
sys.stdout.write("%s\n" % "".join(ords[begin:begin+PER]))
sys.stdout.write('\n')
sys.stdout.flush()
if sys.stdin in readers:
input = sys.stdin.readline()
# sys.stdout.write(input)
writ.write(input)