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976 lines
34 KiB
976 lines
34 KiB
#!/home/hendrik/Projects/midistepper/bin/python
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#
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# Very simple serial terminal
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#
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# This file is part of pySerial. https://github.com/pyserial/pyserial
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# (C)2002-2015 Chris Liechti <cliechti@gmx.net>
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#
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# SPDX-License-Identifier: BSD-3-Clause
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import codecs
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import os
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import sys
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import threading
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import serial
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from serial.tools.list_ports import comports
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from serial.tools import hexlify_codec
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# pylint: disable=wrong-import-order,wrong-import-position
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codecs.register(lambda c: hexlify_codec.getregentry() if c == 'hexlify' else None)
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try:
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raw_input
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except NameError:
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# pylint: disable=redefined-builtin,invalid-name
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raw_input = input # in python3 it's "raw"
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unichr = chr
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def key_description(character):
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"""generate a readable description for a key"""
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ascii_code = ord(character)
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if ascii_code < 32:
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return 'Ctrl+{:c}'.format(ord('@') + ascii_code)
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else:
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return repr(character)
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# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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class ConsoleBase(object):
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"""OS abstraction for console (input/output codec, no echo)"""
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def __init__(self):
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if sys.version_info >= (3, 0):
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self.byte_output = sys.stdout.buffer
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else:
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self.byte_output = sys.stdout
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self.output = sys.stdout
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def setup(self):
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"""Set console to read single characters, no echo"""
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def cleanup(self):
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"""Restore default console settings"""
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def getkey(self):
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"""Read a single key from the console"""
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return None
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def write_bytes(self, byte_string):
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"""Write bytes (already encoded)"""
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self.byte_output.write(byte_string)
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self.byte_output.flush()
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def write(self, text):
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"""Write string"""
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self.output.write(text)
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self.output.flush()
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def cancel(self):
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"""Cancel getkey operation"""
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# - - - - - - - - - - - - - - - - - - - - - - - -
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# context manager:
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# switch terminal temporary to normal mode (e.g. to get user input)
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def __enter__(self):
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self.cleanup()
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return self
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def __exit__(self, *args, **kwargs):
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self.setup()
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if os.name == 'nt': # noqa
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import msvcrt
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import ctypes
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class Out(object):
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"""file-like wrapper that uses os.write"""
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def __init__(self, fd):
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self.fd = fd
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def flush(self):
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pass
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def write(self, s):
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os.write(self.fd, s)
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class Console(ConsoleBase):
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def __init__(self):
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super(Console, self).__init__()
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self._saved_ocp = ctypes.windll.kernel32.GetConsoleOutputCP()
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self._saved_icp = ctypes.windll.kernel32.GetConsoleCP()
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ctypes.windll.kernel32.SetConsoleOutputCP(65001)
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ctypes.windll.kernel32.SetConsoleCP(65001)
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self.output = codecs.getwriter('UTF-8')(Out(sys.stdout.fileno()), 'replace')
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# the change of the code page is not propagated to Python, manually fix it
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sys.stderr = codecs.getwriter('UTF-8')(Out(sys.stderr.fileno()), 'replace')
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sys.stdout = self.output
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self.output.encoding = 'UTF-8' # needed for input
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def __del__(self):
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ctypes.windll.kernel32.SetConsoleOutputCP(self._saved_ocp)
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ctypes.windll.kernel32.SetConsoleCP(self._saved_icp)
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def getkey(self):
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while True:
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z = msvcrt.getwch()
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if z == unichr(13):
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return unichr(10)
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elif z in (unichr(0), unichr(0x0e)): # functions keys, ignore
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msvcrt.getwch()
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else:
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return z
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def cancel(self):
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# CancelIo, CancelSynchronousIo do not seem to work when using
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# getwch, so instead, send a key to the window with the console
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hwnd = ctypes.windll.kernel32.GetConsoleWindow()
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ctypes.windll.user32.PostMessageA(hwnd, 0x100, 0x0d, 0)
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elif os.name == 'posix':
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import atexit
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import termios
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import fcntl
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class Console(ConsoleBase):
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def __init__(self):
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super(Console, self).__init__()
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self.fd = sys.stdin.fileno()
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self.old = termios.tcgetattr(self.fd)
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atexit.register(self.cleanup)
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if sys.version_info < (3, 0):
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self.enc_stdin = codecs.getreader(sys.stdin.encoding)(sys.stdin)
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else:
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self.enc_stdin = sys.stdin
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def setup(self):
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new = termios.tcgetattr(self.fd)
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new[3] = new[3] & ~termios.ICANON & ~termios.ECHO & ~termios.ISIG
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new[6][termios.VMIN] = 1
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new[6][termios.VTIME] = 0
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termios.tcsetattr(self.fd, termios.TCSANOW, new)
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def getkey(self):
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c = self.enc_stdin.read(1)
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if c == unichr(0x7f):
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c = unichr(8) # map the BS key (which yields DEL) to backspace
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return c
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def cancel(self):
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fcntl.ioctl(self.fd, termios.TIOCSTI, b'\0')
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def cleanup(self):
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termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.old)
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else:
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raise NotImplementedError(
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'Sorry no implementation for your platform ({}) available.'.format(sys.platform))
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# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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class Transform(object):
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"""do-nothing: forward all data unchanged"""
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def rx(self, text):
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"""text received from serial port"""
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return text
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def tx(self, text):
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"""text to be sent to serial port"""
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return text
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def echo(self, text):
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"""text to be sent but displayed on console"""
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return text
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class CRLF(Transform):
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"""ENTER sends CR+LF"""
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def tx(self, text):
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return text.replace('\n', '\r\n')
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class CR(Transform):
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"""ENTER sends CR"""
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def rx(self, text):
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return text.replace('\r', '\n')
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def tx(self, text):
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return text.replace('\n', '\r')
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class LF(Transform):
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"""ENTER sends LF"""
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class NoTerminal(Transform):
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"""remove typical terminal control codes from input"""
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REPLACEMENT_MAP = dict((x, 0x2400 + x) for x in range(32) if unichr(x) not in '\r\n\b\t')
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REPLACEMENT_MAP.update(
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{
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0x7F: 0x2421, # DEL
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0x9B: 0x2425, # CSI
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})
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def rx(self, text):
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return text.translate(self.REPLACEMENT_MAP)
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echo = rx
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class NoControls(NoTerminal):
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"""Remove all control codes, incl. CR+LF"""
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REPLACEMENT_MAP = dict((x, 0x2400 + x) for x in range(32))
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REPLACEMENT_MAP.update(
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{
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0x20: 0x2423, # visual space
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0x7F: 0x2421, # DEL
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0x9B: 0x2425, # CSI
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})
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class Printable(Transform):
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"""Show decimal code for all non-ASCII characters and replace most control codes"""
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def rx(self, text):
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r = []
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for c in text:
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if ' ' <= c < '\x7f' or c in '\r\n\b\t':
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r.append(c)
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elif c < ' ':
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r.append(unichr(0x2400 + ord(c)))
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else:
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r.extend(unichr(0x2080 + ord(d) - 48) for d in '{:d}'.format(ord(c)))
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r.append(' ')
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return ''.join(r)
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echo = rx
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class Colorize(Transform):
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"""Apply different colors for received and echo"""
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def __init__(self):
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# XXX make it configurable, use colorama?
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self.input_color = '\x1b[37m'
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self.echo_color = '\x1b[31m'
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def rx(self, text):
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return self.input_color + text
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def echo(self, text):
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return self.echo_color + text
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class DebugIO(Transform):
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"""Print what is sent and received"""
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def rx(self, text):
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sys.stderr.write(' [RX:{}] '.format(repr(text)))
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sys.stderr.flush()
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return text
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def tx(self, text):
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sys.stderr.write(' [TX:{}] '.format(repr(text)))
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sys.stderr.flush()
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return text
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# other ideas:
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# - add date/time for each newline
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# - insert newline after: a) timeout b) packet end character
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EOL_TRANSFORMATIONS = {
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'crlf': CRLF,
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'cr': CR,
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'lf': LF,
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}
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TRANSFORMATIONS = {
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'direct': Transform, # no transformation
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'default': NoTerminal,
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'nocontrol': NoControls,
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'printable': Printable,
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'colorize': Colorize,
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'debug': DebugIO,
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}
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# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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def ask_for_port():
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"""\
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Show a list of ports and ask the user for a choice. To make selection
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easier on systems with long device names, also allow the input of an
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index.
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"""
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sys.stderr.write('\n--- Available ports:\n')
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ports = []
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for n, (port, desc, hwid) in enumerate(sorted(comports()), 1):
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sys.stderr.write('--- {:2}: {:20} {!r}\n'.format(n, port, desc))
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ports.append(port)
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while True:
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port = raw_input('--- Enter port index or full name: ')
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try:
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index = int(port) - 1
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if not 0 <= index < len(ports):
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sys.stderr.write('--- Invalid index!\n')
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continue
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except ValueError:
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pass
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else:
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port = ports[index]
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return port
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class Miniterm(object):
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"""\
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Terminal application. Copy data from serial port to console and vice versa.
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Handle special keys from the console to show menu etc.
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"""
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def __init__(self, serial_instance, echo=False, eol='crlf', filters=()):
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self.console = Console()
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self.serial = serial_instance
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self.echo = echo
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self.raw = False
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self.input_encoding = 'UTF-8'
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self.output_encoding = 'UTF-8'
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self.eol = eol
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self.filters = filters
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self.update_transformations()
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self.exit_character = 0x1d # GS/CTRL+]
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self.menu_character = 0x14 # Menu: CTRL+T
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self.alive = None
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self._reader_alive = None
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self.receiver_thread = None
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self.rx_decoder = None
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self.tx_decoder = None
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def _start_reader(self):
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"""Start reader thread"""
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self._reader_alive = True
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# start serial->console thread
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self.receiver_thread = threading.Thread(target=self.reader, name='rx')
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self.receiver_thread.daemon = True
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self.receiver_thread.start()
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def _stop_reader(self):
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"""Stop reader thread only, wait for clean exit of thread"""
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self._reader_alive = False
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if hasattr(self.serial, 'cancel_read'):
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self.serial.cancel_read()
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self.receiver_thread.join()
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def start(self):
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"""start worker threads"""
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self.alive = True
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self._start_reader()
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# enter console->serial loop
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self.transmitter_thread = threading.Thread(target=self.writer, name='tx')
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self.transmitter_thread.daemon = True
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self.transmitter_thread.start()
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self.console.setup()
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def stop(self):
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"""set flag to stop worker threads"""
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self.alive = False
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def join(self, transmit_only=False):
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"""wait for worker threads to terminate"""
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self.transmitter_thread.join()
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if not transmit_only:
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if hasattr(self.serial, 'cancel_read'):
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self.serial.cancel_read()
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self.receiver_thread.join()
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def close(self):
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self.serial.close()
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def update_transformations(self):
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"""take list of transformation classes and instantiate them for rx and tx"""
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transformations = [EOL_TRANSFORMATIONS[self.eol]] + [TRANSFORMATIONS[f]
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for f in self.filters]
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self.tx_transformations = [t() for t in transformations]
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self.rx_transformations = list(reversed(self.tx_transformations))
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def set_rx_encoding(self, encoding, errors='replace'):
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"""set encoding for received data"""
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self.input_encoding = encoding
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self.rx_decoder = codecs.getincrementaldecoder(encoding)(errors)
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def set_tx_encoding(self, encoding, errors='replace'):
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"""set encoding for transmitted data"""
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self.output_encoding = encoding
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self.tx_encoder = codecs.getincrementalencoder(encoding)(errors)
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def dump_port_settings(self):
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"""Write current settings to sys.stderr"""
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sys.stderr.write("\n--- Settings: {p.name} {p.baudrate},{p.bytesize},{p.parity},{p.stopbits}\n".format(
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p=self.serial))
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sys.stderr.write('--- RTS: {:8} DTR: {:8} BREAK: {:8}\n'.format(
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('active' if self.serial.rts else 'inactive'),
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('active' if self.serial.dtr else 'inactive'),
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('active' if self.serial.break_condition else 'inactive')))
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try:
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sys.stderr.write('--- CTS: {:8} DSR: {:8} RI: {:8} CD: {:8}\n'.format(
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('active' if self.serial.cts else 'inactive'),
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('active' if self.serial.dsr else 'inactive'),
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('active' if self.serial.ri else 'inactive'),
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('active' if self.serial.cd else 'inactive')))
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except serial.SerialException:
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# on RFC 2217 ports, it can happen if no modem state notification was
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# yet received. ignore this error.
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pass
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sys.stderr.write('--- software flow control: {}\n'.format('active' if self.serial.xonxoff else 'inactive'))
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sys.stderr.write('--- hardware flow control: {}\n'.format('active' if self.serial.rtscts else 'inactive'))
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sys.stderr.write('--- serial input encoding: {}\n'.format(self.input_encoding))
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sys.stderr.write('--- serial output encoding: {}\n'.format(self.output_encoding))
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sys.stderr.write('--- EOL: {}\n'.format(self.eol.upper()))
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sys.stderr.write('--- filters: {}\n'.format(' '.join(self.filters)))
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def reader(self):
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"""loop and copy serial->console"""
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try:
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while self.alive and self._reader_alive:
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# read all that is there or wait for one byte
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data = self.serial.read(self.serial.in_waiting or 1)
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if data:
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if self.raw:
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self.console.write_bytes(data)
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else:
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text = self.rx_decoder.decode(data)
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for transformation in self.rx_transformations:
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text = transformation.rx(text)
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self.console.write(text)
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except serial.SerialException:
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self.alive = False
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self.console.cancel()
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raise # XXX handle instead of re-raise?
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def writer(self):
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"""\
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Loop and copy console->serial until self.exit_character character is
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found. When self.menu_character is found, interpret the next key
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locally.
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"""
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menu_active = False
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try:
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while self.alive:
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try:
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c = self.console.getkey()
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except KeyboardInterrupt:
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c = '\x03'
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if not self.alive:
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break
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if menu_active:
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self.handle_menu_key(c)
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menu_active = False
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elif c == self.menu_character:
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menu_active = True # next char will be for menu
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elif c == self.exit_character:
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self.stop() # exit app
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break
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else:
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#~ if self.raw:
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text = c
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for transformation in self.tx_transformations:
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text = transformation.tx(text)
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self.serial.write(self.tx_encoder.encode(text))
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if self.echo:
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echo_text = c
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for transformation in self.tx_transformations:
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echo_text = transformation.echo(echo_text)
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self.console.write(echo_text)
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except:
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self.alive = False
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raise
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def handle_menu_key(self, c):
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"""Implement a simple menu / settings"""
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if c == self.menu_character or c == self.exit_character:
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# Menu/exit character again -> send itself
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self.serial.write(self.tx_encoder.encode(c))
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if self.echo:
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self.console.write(c)
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elif c == '\x15': # CTRL+U -> upload file
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self.upload_file()
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elif c in '\x08hH?': # CTRL+H, h, H, ? -> Show help
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sys.stderr.write(self.get_help_text())
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elif c == '\x12': # CTRL+R -> Toggle RTS
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self.serial.rts = not self.serial.rts
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sys.stderr.write('--- RTS {} ---\n'.format('active' if self.serial.rts else 'inactive'))
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elif c == '\x04': # CTRL+D -> Toggle DTR
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self.serial.dtr = not self.serial.dtr
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sys.stderr.write('--- DTR {} ---\n'.format('active' if self.serial.dtr else 'inactive'))
|
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elif c == '\x02': # CTRL+B -> toggle BREAK condition
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|
self.serial.break_condition = not self.serial.break_condition
|
|
sys.stderr.write('--- BREAK {} ---\n'.format('active' if self.serial.break_condition else 'inactive'))
|
|
elif c == '\x05': # CTRL+E -> toggle local echo
|
|
self.echo = not self.echo
|
|
sys.stderr.write('--- local echo {} ---\n'.format('active' if self.echo else 'inactive'))
|
|
elif c == '\x06': # CTRL+F -> edit filters
|
|
self.change_filter()
|
|
elif c == '\x0c': # CTRL+L -> EOL mode
|
|
modes = list(EOL_TRANSFORMATIONS) # keys
|
|
eol = modes.index(self.eol) + 1
|
|
if eol >= len(modes):
|
|
eol = 0
|
|
self.eol = modes[eol]
|
|
sys.stderr.write('--- EOL: {} ---\n'.format(self.eol.upper()))
|
|
self.update_transformations()
|
|
elif c == '\x01': # CTRL+A -> set encoding
|
|
self.change_encoding()
|
|
elif c == '\x09': # CTRL+I -> info
|
|
self.dump_port_settings()
|
|
#~ elif c == '\x01': # CTRL+A -> cycle escape mode
|
|
#~ elif c == '\x0c': # CTRL+L -> cycle linefeed mode
|
|
elif c in 'pP': # P -> change port
|
|
self.change_port()
|
|
elif c in 'sS': # S -> suspend / open port temporarily
|
|
self.suspend_port()
|
|
elif c in 'bB': # B -> change baudrate
|
|
self.change_baudrate()
|
|
elif c == '8': # 8 -> change to 8 bits
|
|
self.serial.bytesize = serial.EIGHTBITS
|
|
self.dump_port_settings()
|
|
elif c == '7': # 7 -> change to 8 bits
|
|
self.serial.bytesize = serial.SEVENBITS
|
|
self.dump_port_settings()
|
|
elif c in 'eE': # E -> change to even parity
|
|
self.serial.parity = serial.PARITY_EVEN
|
|
self.dump_port_settings()
|
|
elif c in 'oO': # O -> change to odd parity
|
|
self.serial.parity = serial.PARITY_ODD
|
|
self.dump_port_settings()
|
|
elif c in 'mM': # M -> change to mark parity
|
|
self.serial.parity = serial.PARITY_MARK
|
|
self.dump_port_settings()
|
|
elif c in 'sS': # S -> change to space parity
|
|
self.serial.parity = serial.PARITY_SPACE
|
|
self.dump_port_settings()
|
|
elif c in 'nN': # N -> change to no parity
|
|
self.serial.parity = serial.PARITY_NONE
|
|
self.dump_port_settings()
|
|
elif c == '1': # 1 -> change to 1 stop bits
|
|
self.serial.stopbits = serial.STOPBITS_ONE
|
|
self.dump_port_settings()
|
|
elif c == '2': # 2 -> change to 2 stop bits
|
|
self.serial.stopbits = serial.STOPBITS_TWO
|
|
self.dump_port_settings()
|
|
elif c == '3': # 3 -> change to 1.5 stop bits
|
|
self.serial.stopbits = serial.STOPBITS_ONE_POINT_FIVE
|
|
self.dump_port_settings()
|
|
elif c in 'xX': # X -> change software flow control
|
|
self.serial.xonxoff = (c == 'X')
|
|
self.dump_port_settings()
|
|
elif c in 'rR': # R -> change hardware flow control
|
|
self.serial.rtscts = (c == 'R')
|
|
self.dump_port_settings()
|
|
else:
|
|
sys.stderr.write('--- unknown menu character {} --\n'.format(key_description(c)))
|
|
|
|
def upload_file(self):
|
|
"""Ask user for filenname and send its contents"""
|
|
sys.stderr.write('\n--- File to upload: ')
|
|
sys.stderr.flush()
|
|
with self.console:
|
|
filename = sys.stdin.readline().rstrip('\r\n')
|
|
if filename:
|
|
try:
|
|
with open(filename, 'rb') as f:
|
|
sys.stderr.write('--- Sending file {} ---\n'.format(filename))
|
|
while True:
|
|
block = f.read(1024)
|
|
if not block:
|
|
break
|
|
self.serial.write(block)
|
|
# Wait for output buffer to drain.
|
|
self.serial.flush()
|
|
sys.stderr.write('.') # Progress indicator.
|
|
sys.stderr.write('\n--- File {} sent ---\n'.format(filename))
|
|
except IOError as e:
|
|
sys.stderr.write('--- ERROR opening file {}: {} ---\n'.format(filename, e))
|
|
|
|
def change_filter(self):
|
|
"""change the i/o transformations"""
|
|
sys.stderr.write('\n--- Available Filters:\n')
|
|
sys.stderr.write('\n'.join(
|
|
'--- {:<10} = {.__doc__}'.format(k, v)
|
|
for k, v in sorted(TRANSFORMATIONS.items())))
|
|
sys.stderr.write('\n--- Enter new filter name(s) [{}]: '.format(' '.join(self.filters)))
|
|
with self.console:
|
|
new_filters = sys.stdin.readline().lower().split()
|
|
if new_filters:
|
|
for f in new_filters:
|
|
if f not in TRANSFORMATIONS:
|
|
sys.stderr.write('--- unknown filter: {}\n'.format(repr(f)))
|
|
break
|
|
else:
|
|
self.filters = new_filters
|
|
self.update_transformations()
|
|
sys.stderr.write('--- filters: {}\n'.format(' '.join(self.filters)))
|
|
|
|
def change_encoding(self):
|
|
"""change encoding on the serial port"""
|
|
sys.stderr.write('\n--- Enter new encoding name [{}]: '.format(self.input_encoding))
|
|
with self.console:
|
|
new_encoding = sys.stdin.readline().strip()
|
|
if new_encoding:
|
|
try:
|
|
codecs.lookup(new_encoding)
|
|
except LookupError:
|
|
sys.stderr.write('--- invalid encoding name: {}\n'.format(new_encoding))
|
|
else:
|
|
self.set_rx_encoding(new_encoding)
|
|
self.set_tx_encoding(new_encoding)
|
|
sys.stderr.write('--- serial input encoding: {}\n'.format(self.input_encoding))
|
|
sys.stderr.write('--- serial output encoding: {}\n'.format(self.output_encoding))
|
|
|
|
def change_baudrate(self):
|
|
"""change the baudrate"""
|
|
sys.stderr.write('\n--- Baudrate: ')
|
|
sys.stderr.flush()
|
|
with self.console:
|
|
backup = self.serial.baudrate
|
|
try:
|
|
self.serial.baudrate = int(sys.stdin.readline().strip())
|
|
except ValueError as e:
|
|
sys.stderr.write('--- ERROR setting baudrate: {} ---\n'.format(e))
|
|
self.serial.baudrate = backup
|
|
else:
|
|
self.dump_port_settings()
|
|
|
|
def change_port(self):
|
|
"""Have a conversation with the user to change the serial port"""
|
|
with self.console:
|
|
try:
|
|
port = ask_for_port()
|
|
except KeyboardInterrupt:
|
|
port = None
|
|
if port and port != self.serial.port:
|
|
# reader thread needs to be shut down
|
|
self._stop_reader()
|
|
# save settings
|
|
settings = self.serial.getSettingsDict()
|
|
try:
|
|
new_serial = serial.serial_for_url(port, do_not_open=True)
|
|
# restore settings and open
|
|
new_serial.applySettingsDict(settings)
|
|
new_serial.rts = self.serial.rts
|
|
new_serial.dtr = self.serial.dtr
|
|
new_serial.open()
|
|
new_serial.break_condition = self.serial.break_condition
|
|
except Exception as e:
|
|
sys.stderr.write('--- ERROR opening new port: {} ---\n'.format(e))
|
|
new_serial.close()
|
|
else:
|
|
self.serial.close()
|
|
self.serial = new_serial
|
|
sys.stderr.write('--- Port changed to: {} ---\n'.format(self.serial.port))
|
|
# and restart the reader thread
|
|
self._start_reader()
|
|
|
|
def suspend_port(self):
|
|
"""\
|
|
open port temporarily, allow reconnect, exit and port change to get
|
|
out of the loop
|
|
"""
|
|
# reader thread needs to be shut down
|
|
self._stop_reader()
|
|
self.serial.close()
|
|
sys.stderr.write('\n--- Port closed: {} ---\n'.format(self.serial.port))
|
|
do_change_port = False
|
|
while not self.serial.is_open:
|
|
sys.stderr.write('--- Quit: {exit} | p: port change | any other key to reconnect ---\n'.format(
|
|
exit=key_description(self.exit_character)))
|
|
k = self.console.getkey()
|
|
if k == self.exit_character:
|
|
self.stop() # exit app
|
|
break
|
|
elif k in 'pP':
|
|
do_change_port = True
|
|
break
|
|
try:
|
|
self.serial.open()
|
|
except Exception as e:
|
|
sys.stderr.write('--- ERROR opening port: {} ---\n'.format(e))
|
|
if do_change_port:
|
|
self.change_port()
|
|
else:
|
|
# and restart the reader thread
|
|
self._start_reader()
|
|
sys.stderr.write('--- Port opened: {} ---\n'.format(self.serial.port))
|
|
|
|
def get_help_text(self):
|
|
"""return the help text"""
|
|
# help text, starts with blank line!
|
|
return """
|
|
--- pySerial ({version}) - miniterm - help
|
|
---
|
|
--- {exit:8} Exit program
|
|
--- {menu:8} Menu escape key, followed by:
|
|
--- Menu keys:
|
|
--- {menu:7} Send the menu character itself to remote
|
|
--- {exit:7} Send the exit character itself to remote
|
|
--- {info:7} Show info
|
|
--- {upload:7} Upload file (prompt will be shown)
|
|
--- {repr:7} encoding
|
|
--- {filter:7} edit filters
|
|
--- Toggles:
|
|
--- {rts:7} RTS {dtr:7} DTR {brk:7} BREAK
|
|
--- {echo:7} echo {eol:7} EOL
|
|
---
|
|
--- Port settings ({menu} followed by the following):
|
|
--- p change port
|
|
--- 7 8 set data bits
|
|
--- N E O S M change parity (None, Even, Odd, Space, Mark)
|
|
--- 1 2 3 set stop bits (1, 2, 1.5)
|
|
--- b change baud rate
|
|
--- x X disable/enable software flow control
|
|
--- r R disable/enable hardware flow control
|
|
""".format(version=getattr(serial, 'VERSION', 'unknown version'),
|
|
exit=key_description(self.exit_character),
|
|
menu=key_description(self.menu_character),
|
|
rts=key_description('\x12'),
|
|
dtr=key_description('\x04'),
|
|
brk=key_description('\x02'),
|
|
echo=key_description('\x05'),
|
|
info=key_description('\x09'),
|
|
upload=key_description('\x15'),
|
|
repr=key_description('\x01'),
|
|
filter=key_description('\x06'),
|
|
eol=key_description('\x0c'))
|
|
|
|
|
|
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
# default args can be used to override when calling main() from an other script
|
|
# e.g to create a miniterm-my-device.py
|
|
def main(default_port=None, default_baudrate=9600, default_rts=None, default_dtr=None):
|
|
"""Command line tool, entry point"""
|
|
|
|
import argparse
|
|
|
|
parser = argparse.ArgumentParser(
|
|
description="Miniterm - A simple terminal program for the serial port.")
|
|
|
|
parser.add_argument(
|
|
"port",
|
|
nargs='?',
|
|
help="serial port name ('-' to show port list)",
|
|
default=default_port)
|
|
|
|
parser.add_argument(
|
|
"baudrate",
|
|
nargs='?',
|
|
type=int,
|
|
help="set baud rate, default: %(default)s",
|
|
default=default_baudrate)
|
|
|
|
group = parser.add_argument_group("port settings")
|
|
|
|
group.add_argument(
|
|
"--parity",
|
|
choices=['N', 'E', 'O', 'S', 'M'],
|
|
type=lambda c: c.upper(),
|
|
help="set parity, one of {N E O S M}, default: N",
|
|
default='N')
|
|
|
|
group.add_argument(
|
|
"--rtscts",
|
|
action="store_true",
|
|
help="enable RTS/CTS flow control (default off)",
|
|
default=False)
|
|
|
|
group.add_argument(
|
|
"--xonxoff",
|
|
action="store_true",
|
|
help="enable software flow control (default off)",
|
|
default=False)
|
|
|
|
group.add_argument(
|
|
"--rts",
|
|
type=int,
|
|
help="set initial RTS line state (possible values: 0, 1)",
|
|
default=default_rts)
|
|
|
|
group.add_argument(
|
|
"--dtr",
|
|
type=int,
|
|
help="set initial DTR line state (possible values: 0, 1)",
|
|
default=default_dtr)
|
|
|
|
group.add_argument(
|
|
"--ask",
|
|
action="store_true",
|
|
help="ask again for port when open fails",
|
|
default=False)
|
|
|
|
group = parser.add_argument_group("data handling")
|
|
|
|
group.add_argument(
|
|
"-e", "--echo",
|
|
action="store_true",
|
|
help="enable local echo (default off)",
|
|
default=False)
|
|
|
|
group.add_argument(
|
|
"--encoding",
|
|
dest="serial_port_encoding",
|
|
metavar="CODEC",
|
|
help="set the encoding for the serial port (e.g. hexlify, Latin1, UTF-8), default: %(default)s",
|
|
default='UTF-8')
|
|
|
|
group.add_argument(
|
|
"-f", "--filter",
|
|
action="append",
|
|
metavar="NAME",
|
|
help="add text transformation",
|
|
default=[])
|
|
|
|
group.add_argument(
|
|
"--eol",
|
|
choices=['CR', 'LF', 'CRLF'],
|
|
type=lambda c: c.upper(),
|
|
help="end of line mode",
|
|
default='CRLF')
|
|
|
|
group.add_argument(
|
|
"--raw",
|
|
action="store_true",
|
|
help="Do no apply any encodings/transformations",
|
|
default=False)
|
|
|
|
group = parser.add_argument_group("hotkeys")
|
|
|
|
group.add_argument(
|
|
"--exit-char",
|
|
type=int,
|
|
metavar='NUM',
|
|
help="Unicode of special character that is used to exit the application, default: %(default)s",
|
|
default=0x1d) # GS/CTRL+]
|
|
|
|
group.add_argument(
|
|
"--menu-char",
|
|
type=int,
|
|
metavar='NUM',
|
|
help="Unicode code of special character that is used to control miniterm (menu), default: %(default)s",
|
|
default=0x14) # Menu: CTRL+T
|
|
|
|
group = parser.add_argument_group("diagnostics")
|
|
|
|
group.add_argument(
|
|
"-q", "--quiet",
|
|
action="store_true",
|
|
help="suppress non-error messages",
|
|
default=False)
|
|
|
|
group.add_argument(
|
|
"--develop",
|
|
action="store_true",
|
|
help="show Python traceback on error",
|
|
default=False)
|
|
|
|
args = parser.parse_args()
|
|
|
|
if args.menu_char == args.exit_char:
|
|
parser.error('--exit-char can not be the same as --menu-char')
|
|
|
|
if args.filter:
|
|
if 'help' in args.filter:
|
|
sys.stderr.write('Available filters:\n')
|
|
sys.stderr.write('\n'.join(
|
|
'{:<10} = {.__doc__}'.format(k, v)
|
|
for k, v in sorted(TRANSFORMATIONS.items())))
|
|
sys.stderr.write('\n')
|
|
sys.exit(1)
|
|
filters = args.filter
|
|
else:
|
|
filters = ['default']
|
|
|
|
while True:
|
|
# no port given on command line -> ask user now
|
|
if args.port is None or args.port == '-':
|
|
try:
|
|
args.port = ask_for_port()
|
|
except KeyboardInterrupt:
|
|
sys.stderr.write('\n')
|
|
parser.error('user aborted and port is not given')
|
|
else:
|
|
if not args.port:
|
|
parser.error('port is not given')
|
|
try:
|
|
serial_instance = serial.serial_for_url(
|
|
args.port,
|
|
args.baudrate,
|
|
parity=args.parity,
|
|
rtscts=args.rtscts,
|
|
xonxoff=args.xonxoff,
|
|
do_not_open=True)
|
|
|
|
if not hasattr(serial_instance, 'cancel_read'):
|
|
# enable timeout for alive flag polling if cancel_read is not available
|
|
serial_instance.timeout = 1
|
|
|
|
if args.dtr is not None:
|
|
if not args.quiet:
|
|
sys.stderr.write('--- forcing DTR {}\n'.format('active' if args.dtr else 'inactive'))
|
|
serial_instance.dtr = args.dtr
|
|
if args.rts is not None:
|
|
if not args.quiet:
|
|
sys.stderr.write('--- forcing RTS {}\n'.format('active' if args.rts else 'inactive'))
|
|
serial_instance.rts = args.rts
|
|
|
|
serial_instance.open()
|
|
except serial.SerialException as e:
|
|
sys.stderr.write('could not open port {}: {}\n'.format(repr(args.port), e))
|
|
if args.develop:
|
|
raise
|
|
if not args.ask:
|
|
sys.exit(1)
|
|
else:
|
|
args.port = '-'
|
|
else:
|
|
break
|
|
|
|
miniterm = Miniterm(
|
|
serial_instance,
|
|
echo=args.echo,
|
|
eol=args.eol.lower(),
|
|
filters=filters)
|
|
miniterm.exit_character = unichr(args.exit_char)
|
|
miniterm.menu_character = unichr(args.menu_char)
|
|
miniterm.raw = args.raw
|
|
miniterm.set_rx_encoding(args.serial_port_encoding)
|
|
miniterm.set_tx_encoding(args.serial_port_encoding)
|
|
|
|
if not args.quiet:
|
|
sys.stderr.write('--- Miniterm on {p.name} {p.baudrate},{p.bytesize},{p.parity},{p.stopbits} ---\n'.format(
|
|
p=miniterm.serial))
|
|
sys.stderr.write('--- Quit: {} | Menu: {} | Help: {} followed by {} ---\n'.format(
|
|
key_description(miniterm.exit_character),
|
|
key_description(miniterm.menu_character),
|
|
key_description(miniterm.menu_character),
|
|
key_description('\x08')))
|
|
|
|
miniterm.start()
|
|
try:
|
|
miniterm.join(True)
|
|
except KeyboardInterrupt:
|
|
pass
|
|
if not args.quiet:
|
|
sys.stderr.write("\n--- exit ---\n")
|
|
miniterm.join()
|
|
miniterm.close()
|
|
|
|
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
if __name__ == '__main__':
|
|
main()
|
|
|