forked from espressif/esptool
/
terminal.py
executable file
·124 lines (104 loc) · 3.42 KB
/
terminal.py
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#!/usr/bin/env python
#
# Copyright (c) 2015 Jeff Kent <jeff@jkent.net>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#
import sys
if sys.platform == 'win32':
import msvcrt
from time import sleep
else:
from select import select
import termios
import tty
def stdin_gen(timeout=0.05):
"""Generator returns keystrokes from stdin"""
if sys.platform == 'win32':
do_timeout = True
while msvcrt.kbhit():
do_timeout = False
c = msvcrt.getch()
yield c
if do_timeout:
sleep(timeout)
else:
while select([sys.stdin.fileno()], [], [], timeout)[0]:
c = sys.stdin.read(1)
yield c
class raw_tty:
"""Decorator for wrapping functions needing raw tty"""
def __init__(self, f):
self.f = f
def __call__(self, *args):
ret = None
if sys.platform != 'win32':
try:
self.saved = termios.tcgetattr(sys.stdin)
tty.setraw(sys.stdin.fileno())
ret = self.f(*args)
finally:
termios.tcsetattr(sys.stdin, termios.TCSADRAIN,
self.saved)
else:
ret = self.f(*args)
return ret
@raw_tty
def terminal(sp, auto_newline=True):
"""Interactive serial terminal.
^C twice in a row will stop the session.
"""
break_count = 0
while break_count < 2:
serial_input = sp.read(sp.inWaiting())
if serial_input:
sys.stdout.write(serial_input)
sys.stdout.flush()
user_input = ''
for c in stdin_gen():
if c == '\x03':
break_count += 1
if break_count >= 2:
break
else:
break_count = 0
if auto_newline and c == '\r':
c += '\n'
user_input += c
if user_input:
sp.write(user_input)
sp.flush()
sys.stdout.write('\n\r')
if __name__ == '__main__':
from serial import Serial
def usage():
print "%s PORT [BAUD]" % sys.argv[0]
sys.exit(1)
if len(sys.argv) < 2 or len(sys.argv) > 3:
usage()
port = sys.argv[1]
baud = 115200
try:
if len(sys.argv) == 3:
baud = int(sys.argv[2])
except:
usage()
sp = Serial(port, baud, timeout=0.25)
print "Press ^C two times to exit"
terminal(sp)