695 lines
27 KiB
Python
Executable File
695 lines
27 KiB
Python
Executable File
#!/usr/bin/env python
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# Very simple serial terminal
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# (C)2002-2011 Chris Liechti <cliechti@gmx.net>
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# Input characters are sent directly (only LF -> CR/LF/CRLF translation is
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# done), received characters are displayed as is (or escaped trough pythons
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# repr, useful for debug purposes)
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import sys, os, serial, threading
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try:
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from serial.tools.list_ports import comports
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except ImportError:
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comports = None
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EXITCHARCTER = serial.to_bytes([0x1d]) # GS/CTRL+]
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MENUCHARACTER = serial.to_bytes([0x14]) # Menu: CTRL+T
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DEFAULT_PORT = None
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DEFAULT_BAUDRATE = 9600
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DEFAULT_RTS = None
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DEFAULT_DTR = None
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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' % (ord('@') + ascii_code)
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else:
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return repr(character)
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# help text, starts with blank line! it's a function so that the current values
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# for the shortcut keys is used and not the value at program start
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def get_help_text():
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return """
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--- pySerial (%(version)s) - miniterm - help
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---
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--- %(exit)-8s Exit program
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--- %(menu)-8s Menu escape key, followed by:
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--- Menu keys:
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--- %(itself)-7s Send the menu character itself to remote
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--- %(exchar)-7s Send the exit character itself to remote
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--- %(info)-7s Show info
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--- %(upload)-7s Upload file (prompt will be shown)
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--- Toggles:
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--- %(rts)-7s RTS %(echo)-7s local echo
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--- %(dtr)-7s DTR %(break)-7s BREAK
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--- %(lfm)-7s line feed %(repr)-7s Cycle repr mode
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---
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--- Port settings (%(menu)s followed by the following):
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--- p change port
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--- 7 8 set data bits
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--- n e o s m change parity (None, Even, Odd, Space, Mark)
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--- 1 2 3 set stop bits (1, 2, 1.5)
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--- b change baud rate
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--- x X disable/enable software flow control
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--- r R disable/enable hardware flow control
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""" % {
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'version': getattr(serial, 'VERSION', 'unknown version'),
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'exit': key_description(EXITCHARCTER),
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'menu': key_description(MENUCHARACTER),
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'rts': key_description('\x12'),
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'repr': key_description('\x01'),
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'dtr': key_description('\x04'),
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'lfm': key_description('\x0c'),
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'break': key_description('\x02'),
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'echo': key_description('\x05'),
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'info': key_description('\x09'),
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'upload': key_description('\x15'),
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'itself': key_description(MENUCHARACTER),
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'exchar': key_description(EXITCHARCTER),
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}
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if sys.version_info >= (3, 0):
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def character(b):
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return b.decode('latin1')
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else:
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def character(b):
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return b
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LF = serial.to_bytes([10])
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CR = serial.to_bytes([13])
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CRLF = serial.to_bytes([13, 10])
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X00 = serial.to_bytes([0])
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X0E = serial.to_bytes([0x0e])
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# first choose a platform dependant way to read single characters from the console
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global console
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if os.name == 'nt':
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import msvcrt
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class Console(object):
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def __init__(self):
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pass
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def setup(self):
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pass # Do nothing for 'nt'
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def cleanup(self):
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pass # Do nothing for 'nt'
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def getkey(self):
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while True:
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z = msvcrt.getch()
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if z == X00 or z == X0E: # functions keys, ignore
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msvcrt.getch()
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else:
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if z == CR:
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return LF
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return z
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console = Console()
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elif os.name == 'posix':
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import termios, sys, os
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class Console(object):
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def __init__(self):
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self.fd = sys.stdin.fileno()
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self.old = None
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def setup(self):
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self.old = termios.tcgetattr(self.fd)
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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 = os.read(self.fd, 1)
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return c
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def cleanup(self):
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if self.old is not None:
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termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.old)
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console = Console()
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def cleanup_console():
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console.cleanup()
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sys.exitfunc = cleanup_console # terminal modes have to be restored on exit...
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else:
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raise NotImplementedError("Sorry no implementation for your platform (%s) available." % sys.platform)
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def dump_port_list():
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if comports:
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sys.stderr.write('\n--- Available ports:\n')
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for port, desc, hwid in sorted(comports()):
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#~ sys.stderr.write('--- %-20s %s [%s]\n' % (port, desc, hwid))
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sys.stderr.write('--- %-20s %s\n' % (port, desc))
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CONVERT_CRLF = 2
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CONVERT_CR = 1
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CONVERT_LF = 0
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NEWLINE_CONVERISON_MAP = (LF, CR, CRLF)
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LF_MODES = ('LF', 'CR', 'CR/LF')
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REPR_MODES = ('raw', 'some control', 'all control', 'hex')
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class Miniterm(object):
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def __init__(self, port, baudrate, parity, rtscts, xonxoff, echo=False, convert_outgoing=CONVERT_CRLF, repr_mode=0):
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try:
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self.serial = serial.serial_for_url(port, baudrate, parity=parity, rtscts=rtscts, xonxoff=xonxoff, timeout=1)
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except AttributeError:
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# happens when the installed pyserial is older than 2.5. use the
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# Serial class directly then.
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self.serial = serial.Serial(port, baudrate, parity=parity, rtscts=rtscts, xonxoff=xonxoff, timeout=1)
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self.echo = echo
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self.repr_mode = repr_mode
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self.convert_outgoing = convert_outgoing
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self.newline = NEWLINE_CONVERISON_MAP[self.convert_outgoing]
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self.dtr_state = True
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self.rts_state = True
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self.break_state = False
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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)
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self.receiver_thread.setDaemon(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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self.receiver_thread.join()
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def start(self):
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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)
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self.transmitter_thread.setDaemon(True)
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self.transmitter_thread.start()
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def stop(self):
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self.alive = False
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def join(self, transmit_only=False):
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self.transmitter_thread.join()
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if not transmit_only:
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self.receiver_thread.join()
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def dump_port_settings(self):
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sys.stderr.write("\n--- Settings: %s %s,%s,%s,%s\n" % (
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self.serial.portstr,
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self.serial.baudrate,
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self.serial.bytesize,
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self.serial.parity,
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self.serial.stopbits))
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sys.stderr.write('--- RTS: %-8s DTR: %-8s BREAK: %-8s\n' % (
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(self.rts_state and 'active' or 'inactive'),
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(self.dtr_state and 'active' or 'inactive'),
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(self.break_state and 'active' or 'inactive')))
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try:
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sys.stderr.write('--- CTS: %-8s DSR: %-8s RI: %-8s CD: %-8s\n' % (
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(self.serial.getCTS() and 'active' or 'inactive'),
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(self.serial.getDSR() and 'active' or 'inactive'),
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(self.serial.getRI() and 'active' or 'inactive'),
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(self.serial.getCD() and 'active' or 'inactive')))
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except serial.SerialException:
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# on RFC 2217 ports it can happen to 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: %s\n' % (self.serial.xonxoff and 'active' or 'inactive'))
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sys.stderr.write('--- hardware flow control: %s\n' % (self.serial.rtscts and 'active' or 'inactive'))
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sys.stderr.write('--- data escaping: %s linefeed: %s\n' % (
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REPR_MODES[self.repr_mode],
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LF_MODES[self.convert_outgoing]))
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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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data = character(self.serial.read(1))
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if self.repr_mode == 0:
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# direct output, just have to care about newline setting
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if data == '\r' and self.convert_outgoing == CONVERT_CR:
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sys.stdout.write('\n')
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else:
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sys.stdout.write(data)
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elif self.repr_mode == 1:
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# escape non-printable, let pass newlines
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if self.convert_outgoing == CONVERT_CRLF and data in '\r\n':
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if data == '\n':
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sys.stdout.write('\n')
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elif data == '\r':
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pass
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elif data == '\n' and self.convert_outgoing == CONVERT_LF:
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sys.stdout.write('\n')
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elif data == '\r' and self.convert_outgoing == CONVERT_CR:
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sys.stdout.write('\n')
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else:
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sys.stdout.write(repr(data)[1:-1])
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elif self.repr_mode == 2:
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# escape all non-printable, including newline
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sys.stdout.write(repr(data)[1:-1])
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elif self.repr_mode == 3:
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# escape everything (hexdump)
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for c in data:
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sys.stdout.write("%s " % c.encode('hex'))
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sys.stdout.flush()
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except serial.SerialException, e:
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self.alive = False
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# would be nice if the console reader could be interruptted at this
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# point...
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raise
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def writer(self):
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"""\
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Loop and copy console->serial until EXITCHARCTER character is
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found. When MENUCHARACTER 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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b = console.getkey()
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except KeyboardInterrupt:
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b = serial.to_bytes([3])
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c = character(b)
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if menu_active:
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if c == MENUCHARACTER or c == EXITCHARCTER: # Menu character again/exit char -> send itself
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self.serial.write(b) # send character
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if self.echo:
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sys.stdout.write(c)
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elif c == '\x15': # CTRL+U -> upload file
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sys.stderr.write('\n--- File to upload: ')
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sys.stderr.flush()
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console.cleanup()
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filename = sys.stdin.readline().rstrip('\r\n')
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if filename:
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try:
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file = open(filename, 'r')
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sys.stderr.write('--- Sending file %s ---\n' % filename)
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while True:
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line = file.readline().rstrip('\r\n')
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if not line:
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break
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self.serial.write(line)
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self.serial.write('\r\n')
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# Wait for output buffer to drain.
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self.serial.flush()
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sys.stderr.write('.') # Progress indicator.
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sys.stderr.write('\n--- File %s sent ---\n' % filename)
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except IOError, e:
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sys.stderr.write('--- ERROR opening file %s: %s ---\n' % (filename, e))
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console.setup()
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elif c in '\x08hH?': # CTRL+H, h, H, ? -> Show help
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sys.stderr.write(get_help_text())
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elif c == '\x12': # CTRL+R -> Toggle RTS
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self.rts_state = not self.rts_state
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self.serial.setRTS(self.rts_state)
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sys.stderr.write('--- RTS %s ---\n' % (self.rts_state and 'active' or 'inactive'))
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elif c == '\x04': # CTRL+D -> Toggle DTR
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self.dtr_state = not self.dtr_state
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self.serial.setDTR(self.dtr_state)
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sys.stderr.write('--- DTR %s ---\n' % (self.dtr_state and 'active' or 'inactive'))
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elif c == '\x02': # CTRL+B -> toggle BREAK condition
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self.break_state = not self.break_state
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self.serial.setBreak(self.break_state)
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sys.stderr.write('--- BREAK %s ---\n' % (self.break_state and 'active' or 'inactive'))
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elif c == '\x05': # CTRL+E -> toggle local echo
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self.echo = not self.echo
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sys.stderr.write('--- local echo %s ---\n' % (self.echo and 'active' or 'inactive'))
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elif c == '\x09': # CTRL+I -> info
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self.dump_port_settings()
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elif c == '\x01': # CTRL+A -> cycle escape mode
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self.repr_mode += 1
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if self.repr_mode > 3:
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self.repr_mode = 0
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sys.stderr.write('--- escape data: %s ---\n' % (
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REPR_MODES[self.repr_mode],
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))
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elif c == '\x0c': # CTRL+L -> cycle linefeed mode
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self.convert_outgoing += 1
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if self.convert_outgoing > 2:
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self.convert_outgoing = 0
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self.newline = NEWLINE_CONVERISON_MAP[self.convert_outgoing]
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sys.stderr.write('--- line feed %s ---\n' % (
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LF_MODES[self.convert_outgoing],
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))
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elif c in 'pP': # P -> change port
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dump_port_list()
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sys.stderr.write('--- Enter port name: ')
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sys.stderr.flush()
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console.cleanup()
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try:
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port = sys.stdin.readline().strip()
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except KeyboardInterrupt:
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port = None
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console.setup()
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if port and port != self.serial.port:
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# reader thread needs to be shut down
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self._stop_reader()
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# save settings
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settings = self.serial.getSettingsDict()
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try:
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try:
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new_serial = serial.serial_for_url(port, do_not_open=True)
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except AttributeError:
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# happens when the installed pyserial is older than 2.5. use the
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# Serial class directly then.
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new_serial = serial.Serial()
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new_serial.port = port
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# restore settings and open
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new_serial.applySettingsDict(settings)
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new_serial.open()
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new_serial.setRTS(self.rts_state)
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new_serial.setDTR(self.dtr_state)
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new_serial.setBreak(self.break_state)
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except Exception, e:
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sys.stderr.write('--- ERROR opening new port: %s ---\n' % (e,))
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new_serial.close()
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else:
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self.serial.close()
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self.serial = new_serial
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sys.stderr.write('--- Port changed to: %s ---\n' % (self.serial.port,))
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# and restart the reader thread
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self._start_reader()
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elif c in 'bB': # B -> change baudrate
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sys.stderr.write('\n--- Baudrate: ')
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sys.stderr.flush()
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console.cleanup()
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backup = self.serial.baudrate
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try:
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self.serial.baudrate = int(sys.stdin.readline().strip())
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except ValueError, e:
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sys.stderr.write('--- ERROR setting baudrate: %s ---\n' % (e,))
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self.serial.baudrate = backup
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else:
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self.dump_port_settings()
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console.setup()
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elif c == '8': # 8 -> change to 8 bits
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self.serial.bytesize = serial.EIGHTBITS
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self.dump_port_settings()
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elif c == '7': # 7 -> change to 8 bits
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self.serial.bytesize = serial.SEVENBITS
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self.dump_port_settings()
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elif c in 'eE': # E -> change to even parity
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self.serial.parity = serial.PARITY_EVEN
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self.dump_port_settings()
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elif c in 'oO': # O -> change to odd parity
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self.serial.parity = serial.PARITY_ODD
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self.dump_port_settings()
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elif c in 'mM': # M -> change to mark parity
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self.serial.parity = serial.PARITY_MARK
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self.dump_port_settings()
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elif c in 'sS': # S -> change to space parity
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self.serial.parity = serial.PARITY_SPACE
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self.dump_port_settings()
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elif c in 'nN': # N -> change to no parity
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self.serial.parity = serial.PARITY_NONE
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self.dump_port_settings()
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elif c == '1': # 1 -> change to 1 stop bits
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self.serial.stopbits = serial.STOPBITS_ONE
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self.dump_port_settings()
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elif c == '2': # 2 -> change to 2 stop bits
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self.serial.stopbits = serial.STOPBITS_TWO
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self.dump_port_settings()
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elif c == '3': # 3 -> change to 1.5 stop bits
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self.serial.stopbits = serial.STOPBITS_ONE_POINT_FIVE
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self.dump_port_settings()
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elif c in 'xX': # X -> change software flow control
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self.serial.xonxoff = (c == 'X')
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self.dump_port_settings()
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elif c in 'rR': # R -> change hardware flow control
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self.serial.rtscts = (c == 'R')
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self.dump_port_settings()
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else:
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sys.stderr.write('--- unknown menu character %s --\n' % key_description(c))
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menu_active = False
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elif c == MENUCHARACTER: # next char will be for menu
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menu_active = True
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elif c == EXITCHARCTER:
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self.stop()
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break # exit app
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elif c == '\n':
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self.serial.write(self.newline) # send newline character(s)
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if self.echo:
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sys.stdout.write(c) # local echo is a real newline in any case
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sys.stdout.flush()
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else:
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self.serial.write(b) # send byte
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if self.echo:
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sys.stdout.write(c)
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sys.stdout.flush()
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except:
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self.alive = False
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raise
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def main():
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import optparse
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parser = optparse.OptionParser(
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usage = "%prog [options] [port [baudrate]]",
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description = "Miniterm - A simple terminal program for the serial port."
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|
)
|
|
|
|
group = optparse.OptionGroup(parser, "Port settings")
|
|
|
|
group.add_option("-p", "--port",
|
|
dest = "port",
|
|
help = "port, a number or a device name. (deprecated option, use parameter instead)",
|
|
default = DEFAULT_PORT
|
|
)
|
|
|
|
group.add_option("-b", "--baud",
|
|
dest = "baudrate",
|
|
action = "store",
|
|
type = 'int',
|
|
help = "set baud rate, default %default",
|
|
default = DEFAULT_BAUDRATE
|
|
)
|
|
|
|
group.add_option("--parity",
|
|
dest = "parity",
|
|
action = "store",
|
|
help = "set parity, one of [N, E, O, S, M], default=N",
|
|
default = 'N'
|
|
)
|
|
|
|
group.add_option("--rtscts",
|
|
dest = "rtscts",
|
|
action = "store_true",
|
|
help = "enable RTS/CTS flow control (default off)",
|
|
default = False
|
|
)
|
|
|
|
group.add_option("--xonxoff",
|
|
dest = "xonxoff",
|
|
action = "store_true",
|
|
help = "enable software flow control (default off)",
|
|
default = False
|
|
)
|
|
|
|
group.add_option("--rts",
|
|
dest = "rts_state",
|
|
action = "store",
|
|
type = 'int',
|
|
help = "set initial RTS line state (possible values: 0, 1)",
|
|
default = DEFAULT_RTS
|
|
)
|
|
|
|
group.add_option("--dtr",
|
|
dest = "dtr_state",
|
|
action = "store",
|
|
type = 'int',
|
|
help = "set initial DTR line state (possible values: 0, 1)",
|
|
default = DEFAULT_DTR
|
|
)
|
|
|
|
parser.add_option_group(group)
|
|
|
|
group = optparse.OptionGroup(parser, "Data handling")
|
|
|
|
group.add_option("-e", "--echo",
|
|
dest = "echo",
|
|
action = "store_true",
|
|
help = "enable local echo (default off)",
|
|
default = False
|
|
)
|
|
|
|
group.add_option("--cr",
|
|
dest = "cr",
|
|
action = "store_true",
|
|
help = "do not send CR+LF, send CR only",
|
|
default = False
|
|
)
|
|
|
|
group.add_option("--lf",
|
|
dest = "lf",
|
|
action = "store_true",
|
|
help = "do not send CR+LF, send LF only",
|
|
default = False
|
|
)
|
|
|
|
group.add_option("-D", "--debug",
|
|
dest = "repr_mode",
|
|
action = "count",
|
|
help = """debug received data (escape non-printable chars)
|
|
--debug can be given multiple times:
|
|
0: just print what is received
|
|
1: escape non-printable characters, do newlines as unusual
|
|
2: escape non-printable characters, newlines too
|
|
3: hex dump everything""",
|
|
default = 0
|
|
)
|
|
|
|
parser.add_option_group(group)
|
|
|
|
|
|
group = optparse.OptionGroup(parser, "Hotkeys")
|
|
|
|
group.add_option("--exit-char",
|
|
dest = "exit_char",
|
|
action = "store",
|
|
type = 'int',
|
|
help = "ASCII code of special character that is used to exit the application",
|
|
default = 0x1d
|
|
)
|
|
|
|
group.add_option("--menu-char",
|
|
dest = "menu_char",
|
|
action = "store",
|
|
type = 'int',
|
|
help = "ASCII code of special character that is used to control miniterm (menu)",
|
|
default = 0x14
|
|
)
|
|
|
|
parser.add_option_group(group)
|
|
|
|
group = optparse.OptionGroup(parser, "Diagnostics")
|
|
|
|
group.add_option("-q", "--quiet",
|
|
dest = "quiet",
|
|
action = "store_true",
|
|
help = "suppress non-error messages",
|
|
default = False
|
|
)
|
|
|
|
parser.add_option_group(group)
|
|
|
|
|
|
(options, args) = parser.parse_args()
|
|
|
|
options.parity = options.parity.upper()
|
|
if options.parity not in 'NEOSM':
|
|
parser.error("invalid parity")
|
|
|
|
if options.cr and options.lf:
|
|
parser.error("only one of --cr or --lf can be specified")
|
|
|
|
if options.menu_char == options.exit_char:
|
|
parser.error('--exit-char can not be the same as --menu-char')
|
|
|
|
global EXITCHARCTER, MENUCHARACTER
|
|
EXITCHARCTER = chr(options.exit_char)
|
|
MENUCHARACTER = chr(options.menu_char)
|
|
|
|
port = options.port
|
|
baudrate = options.baudrate
|
|
if args:
|
|
if options.port is not None:
|
|
parser.error("no arguments are allowed, options only when --port is given")
|
|
port = args.pop(0)
|
|
if args:
|
|
try:
|
|
baudrate = int(args[0])
|
|
except ValueError:
|
|
parser.error("baud rate must be a number, not %r" % args[0])
|
|
args.pop(0)
|
|
if args:
|
|
parser.error("too many arguments")
|
|
else:
|
|
# noport given on command line -> ask user now
|
|
if port is None:
|
|
dump_port_list()
|
|
port = raw_input('Enter port name:')
|
|
|
|
convert_outgoing = CONVERT_CRLF
|
|
if options.cr:
|
|
convert_outgoing = CONVERT_CR
|
|
elif options.lf:
|
|
convert_outgoing = CONVERT_LF
|
|
|
|
try:
|
|
miniterm = Miniterm(
|
|
port,
|
|
baudrate,
|
|
options.parity,
|
|
rtscts=options.rtscts,
|
|
xonxoff=options.xonxoff,
|
|
echo=options.echo,
|
|
convert_outgoing=convert_outgoing,
|
|
repr_mode=options.repr_mode,
|
|
)
|
|
except serial.SerialException, e:
|
|
sys.stderr.write("could not open port %r: %s\n" % (port, e))
|
|
sys.exit(1)
|
|
|
|
if not options.quiet:
|
|
sys.stderr.write('--- Miniterm on %s: %d,%s,%s,%s ---\n' % (
|
|
miniterm.serial.portstr,
|
|
miniterm.serial.baudrate,
|
|
miniterm.serial.bytesize,
|
|
miniterm.serial.parity,
|
|
miniterm.serial.stopbits,
|
|
))
|
|
sys.stderr.write('--- Quit: %s | Menu: %s | Help: %s followed by %s ---\n' % (
|
|
key_description(EXITCHARCTER),
|
|
key_description(MENUCHARACTER),
|
|
key_description(MENUCHARACTER),
|
|
key_description('\x08'),
|
|
))
|
|
|
|
if options.dtr_state is not None:
|
|
if not options.quiet:
|
|
sys.stderr.write('--- forcing DTR %s\n' % (options.dtr_state and 'active' or 'inactive'))
|
|
miniterm.serial.setDTR(options.dtr_state)
|
|
miniterm.dtr_state = options.dtr_state
|
|
if options.rts_state is not None:
|
|
if not options.quiet:
|
|
sys.stderr.write('--- forcing RTS %s\n' % (options.rts_state and 'active' or 'inactive'))
|
|
miniterm.serial.setRTS(options.rts_state)
|
|
miniterm.rts_state = options.rts_state
|
|
|
|
console.setup()
|
|
miniterm.start()
|
|
try:
|
|
miniterm.join(True)
|
|
except KeyboardInterrupt:
|
|
pass
|
|
if not options.quiet:
|
|
sys.stderr.write("\n--- exit ---\n")
|
|
miniterm.join()
|
|
#~ console.cleanup()
|
|
|
|
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
if __name__ == '__main__':
|
|
main()
|