[PATCH 4/8] include pyserial trunk
Sascha Hauer
s.hauer at pengutronix.de
Fri Jan 8 03:13:51 PST 2016
From: Jan Luebbe <jlu at pengutronix.de>
The current pyserial is broken, this version contains the fix for:
http://sourceforge.net/p/pyserial/bugs/166/
Signed-off-by: Jan Luebbe <jlu at pengutronix.de>
---
.gitignore | 1 +
scripts/serial/__init__.py | 79 ++
scripts/serial/rfc2217.py | 1327 +++++++++++++++++++++++++
scripts/serial/serialcli.py | 284 ++++++
scripts/serial/serialposix.py | 730 ++++++++++++++
scripts/serial/serialutil.py | 572 +++++++++++
scripts/serial/tools/__init__.py | 0
scripts/serial/tools/list_ports.py | 103 ++
scripts/serial/tools/list_ports_linux.py | 152 +++
scripts/serial/urlhandler/__init__.py | 0
scripts/serial/urlhandler/protocol_hwgrep.py | 45 +
scripts/serial/urlhandler/protocol_loop.py | 279 ++++++
scripts/serial/urlhandler/protocol_rfc2217.py | 11 +
scripts/serial/urlhandler/protocol_socket.py | 291 ++++++
14 files changed, 3874 insertions(+)
create mode 100644 scripts/serial/__init__.py
create mode 100644 scripts/serial/rfc2217.py
create mode 100644 scripts/serial/serialcli.py
create mode 100644 scripts/serial/serialposix.py
create mode 100644 scripts/serial/serialutil.py
create mode 100644 scripts/serial/tools/__init__.py
create mode 100644 scripts/serial/tools/list_ports.py
create mode 100644 scripts/serial/tools/list_ports_linux.py
create mode 100644 scripts/serial/urlhandler/__init__.py
create mode 100644 scripts/serial/urlhandler/protocol_hwgrep.py
create mode 100644 scripts/serial/urlhandler/protocol_loop.py
create mode 100644 scripts/serial/urlhandler/protocol_rfc2217.py
create mode 100644 scripts/serial/urlhandler/protocol_socket.py
diff --git a/.gitignore b/.gitignore
index ce2be8a..bbcfa22 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@
*.symtypes
*.elf
*.patch
+*.pyc
*.mcp
*.bct
*.dcd
diff --git a/scripts/serial/__init__.py b/scripts/serial/__init__.py
new file mode 100644
index 0000000..33ae52e
--- /dev/null
+++ b/scripts/serial/__init__.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+
+# portable serial port access with python
+# this is a wrapper module for different platform implementations
+#
+# (C) 2001-2010 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+
+VERSION = '2.7'
+
+import sys
+
+if sys.platform == 'cli':
+ from serial.serialcli import *
+else:
+ import os
+ # chose an implementation, depending on os
+ if os.name == 'nt': #sys.platform == 'win32':
+ from serial.serialwin32 import *
+ elif os.name == 'posix':
+ from serial.serialposix import *
+ elif os.name == 'java':
+ from serial.serialjava import *
+ else:
+ raise ImportError("Sorry: no implementation for your platform ('%s') available" % (os.name,))
+
+
+protocol_handler_packages = [
+ 'serial.urlhandler',
+ ]
+
+def serial_for_url(url, *args, **kwargs):
+ """\
+ Get an instance of the Serial class, depending on port/url. The port is not
+ opened when the keyword parameter 'do_not_open' is true, by default it
+ is. All other parameters are directly passed to the __init__ method when
+ the port is instantiated.
+
+ The list of package names that is searched for protocol handlers is kept in
+ ``protocol_handler_packages``.
+
+ e.g. we want to support a URL ``foobar://``. A module
+ ``my_handlers.protocol_foobar`` is provided by the user. Then
+ ``protocol_handler_packages.append("my_handlers")`` would extend the search
+ path so that ``serial_for_url("foobar://"))`` would work.
+ """
+ # check remove extra parameter to not confuse the Serial class
+ do_open = 'do_not_open' not in kwargs or not kwargs['do_not_open']
+ if 'do_not_open' in kwargs: del kwargs['do_not_open']
+ # the default is to use the native version
+ klass = Serial # 'native' implementation
+ # check port type and get class
+ try:
+ url_nocase = url.lower()
+ except AttributeError:
+ # it's not a string, use default
+ pass
+ else:
+ if '://' in url_nocase:
+ protocol = url_nocase.split('://', 1)[0]
+ for package_name in protocol_handler_packages:
+ module_name = '%s.protocol_%s' % (package_name, protocol,)
+ try:
+ handler_module = __import__(module_name)
+ except ImportError:
+ pass
+ else:
+ klass = sys.modules[module_name].Serial
+ break
+ else:
+ raise ValueError('invalid URL, protocol %r not known' % (protocol,))
+ else:
+ klass = Serial # 'native' implementation
+ # instantiate and open when desired
+ instance = klass(None, *args, **kwargs)
+ instance.port = url
+ if do_open:
+ instance.open()
+ return instance
diff --git a/scripts/serial/rfc2217.py b/scripts/serial/rfc2217.py
new file mode 100644
index 0000000..4fe1a72
--- /dev/null
+++ b/scripts/serial/rfc2217.py
@@ -0,0 +1,1327 @@
+#! python
+#
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# see __init__.py
+#
+# This module implements a RFC2217 compatible client. RF2217 descibes a
+# protocol to access serial ports over TCP/IP and allows setting the baud rate,
+# modem control lines etc.
+#
+# (C) 2001-2013 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+
+# TODO:
+# - setting control line -> answer is not checked (had problems with one of the
+# severs). consider implementing a compatibility mode flag to make check
+# conditional
+# - write timeout not implemented at all
+
+##############################################################################
+# observations and issues with servers
+#=============================================================================
+# sredird V2.2.1
+# - http://www.ibiblio.org/pub/Linux/system/serial/ sredird-2.2.2.tar.gz
+# - does not acknowledge SET_CONTROL (RTS/DTR) correctly, always responding
+# [105 1] instead of the actual value.
+# - SET_BAUDRATE answer contains 4 extra null bytes -> probably for larger
+# numbers than 2**32?
+# - To get the signature [COM_PORT_OPTION 0] has to be sent.
+# - run a server: while true; do nc -l -p 7000 -c "sredird debug /dev/ttyUSB0 /var/lock/sredir"; done
+#=============================================================================
+# telnetcpcd (untested)
+# - http://ftp.wayne.edu/kermit/sredird/telnetcpcd-1.09.tar.gz
+# - To get the signature [COM_PORT_OPTION] w/o data has to be sent.
+#=============================================================================
+# ser2net
+# - does not negotiate BINARY or COM_PORT_OPTION for his side but at least
+# acknowledges that the client activates these options
+# - The configuration may be that the server prints a banner. As this client
+# implementation does a flushInput on connect, this banner is hidden from
+# the user application.
+# - NOTIFY_MODEMSTATE: the poll interval of the server seems to be one
+# second.
+# - To get the signature [COM_PORT_OPTION 0] has to be sent.
+# - run a server: run ser2net daemon, in /etc/ser2net.conf:
+# 2000:telnet:0:/dev/ttyS0:9600 remctl banner
+##############################################################################
+
+# How to identify ports? pySerial might want to support other protocols in the
+# future, so lets use an URL scheme.
+# for RFC2217 compliant servers we will use this:
+# rfc2217://<host>:<port>[/option[/option...]]
+#
+# options:
+# - "debug" print diagnostic messages
+# - "ign_set_control": do not look at the answers to SET_CONTROL
+# - "poll_modem": issue NOTIFY_MODEMSTATE requests when CTS/DTR/RI/CD is read.
+# Without this option it expects that the server sends notifications
+# automatically on change (which most servers do and is according to the
+# RFC).
+# the order of the options is not relevant
+
+from serial.serialutil import *
+import time
+import struct
+import socket
+import threading
+import Queue
+import logging
+
+# port string is expected to be something like this:
+# rfc2217://host:port
+# host may be an IP or including domain, whatever.
+# port is 0...65535
+
+# map log level names to constants. used in fromURL()
+LOGGER_LEVELS = {
+ 'debug': logging.DEBUG,
+ 'info': logging.INFO,
+ 'warning': logging.WARNING,
+ 'error': logging.ERROR,
+ }
+
+
+# telnet protocol characters
+IAC = to_bytes([255]) # Interpret As Command
+DONT = to_bytes([254])
+DO = to_bytes([253])
+WONT = to_bytes([252])
+WILL = to_bytes([251])
+IAC_DOUBLED = to_bytes([IAC, IAC])
+
+SE = to_bytes([240]) # Subnegotiation End
+NOP = to_bytes([241]) # No Operation
+DM = to_bytes([242]) # Data Mark
+BRK = to_bytes([243]) # Break
+IP = to_bytes([244]) # Interrupt process
+AO = to_bytes([245]) # Abort output
+AYT = to_bytes([246]) # Are You There
+EC = to_bytes([247]) # Erase Character
+EL = to_bytes([248]) # Erase Line
+GA = to_bytes([249]) # Go Ahead
+SB = to_bytes([250]) # Subnegotiation Begin
+
+# selected telnet options
+BINARY = to_bytes([0]) # 8-bit data path
+ECHO = to_bytes([1]) # echo
+SGA = to_bytes([3]) # suppress go ahead
+
+# RFC2217
+COM_PORT_OPTION = to_bytes([44])
+
+# Client to Access Server
+SET_BAUDRATE = to_bytes([1])
+SET_DATASIZE = to_bytes([2])
+SET_PARITY = to_bytes([3])
+SET_STOPSIZE = to_bytes([4])
+SET_CONTROL = to_bytes([5])
+NOTIFY_LINESTATE = to_bytes([6])
+NOTIFY_MODEMSTATE = to_bytes([7])
+FLOWCONTROL_SUSPEND = to_bytes([8])
+FLOWCONTROL_RESUME = to_bytes([9])
+SET_LINESTATE_MASK = to_bytes([10])
+SET_MODEMSTATE_MASK = to_bytes([11])
+PURGE_DATA = to_bytes([12])
+
+SERVER_SET_BAUDRATE = to_bytes([101])
+SERVER_SET_DATASIZE = to_bytes([102])
+SERVER_SET_PARITY = to_bytes([103])
+SERVER_SET_STOPSIZE = to_bytes([104])
+SERVER_SET_CONTROL = to_bytes([105])
+SERVER_NOTIFY_LINESTATE = to_bytes([106])
+SERVER_NOTIFY_MODEMSTATE = to_bytes([107])
+SERVER_FLOWCONTROL_SUSPEND = to_bytes([108])
+SERVER_FLOWCONTROL_RESUME = to_bytes([109])
+SERVER_SET_LINESTATE_MASK = to_bytes([110])
+SERVER_SET_MODEMSTATE_MASK = to_bytes([111])
+SERVER_PURGE_DATA = to_bytes([112])
+
+RFC2217_ANSWER_MAP = {
+ SET_BAUDRATE: SERVER_SET_BAUDRATE,
+ SET_DATASIZE: SERVER_SET_DATASIZE,
+ SET_PARITY: SERVER_SET_PARITY,
+ SET_STOPSIZE: SERVER_SET_STOPSIZE,
+ SET_CONTROL: SERVER_SET_CONTROL,
+ NOTIFY_LINESTATE: SERVER_NOTIFY_LINESTATE,
+ NOTIFY_MODEMSTATE: SERVER_NOTIFY_MODEMSTATE,
+ FLOWCONTROL_SUSPEND: SERVER_FLOWCONTROL_SUSPEND,
+ FLOWCONTROL_RESUME: SERVER_FLOWCONTROL_RESUME,
+ SET_LINESTATE_MASK: SERVER_SET_LINESTATE_MASK,
+ SET_MODEMSTATE_MASK: SERVER_SET_MODEMSTATE_MASK,
+ PURGE_DATA: SERVER_PURGE_DATA,
+}
+
+SET_CONTROL_REQ_FLOW_SETTING = to_bytes([0]) # Request Com Port Flow Control Setting (outbound/both)
+SET_CONTROL_USE_NO_FLOW_CONTROL = to_bytes([1]) # Use No Flow Control (outbound/both)
+SET_CONTROL_USE_SW_FLOW_CONTROL = to_bytes([2]) # Use XON/XOFF Flow Control (outbound/both)
+SET_CONTROL_USE_HW_FLOW_CONTROL = to_bytes([3]) # Use HARDWARE Flow Control (outbound/both)
+SET_CONTROL_REQ_BREAK_STATE = to_bytes([4]) # Request BREAK State
+SET_CONTROL_BREAK_ON = to_bytes([5]) # Set BREAK State ON
+SET_CONTROL_BREAK_OFF = to_bytes([6]) # Set BREAK State OFF
+SET_CONTROL_REQ_DTR = to_bytes([7]) # Request DTR Signal State
+SET_CONTROL_DTR_ON = to_bytes([8]) # Set DTR Signal State ON
+SET_CONTROL_DTR_OFF = to_bytes([9]) # Set DTR Signal State OFF
+SET_CONTROL_REQ_RTS = to_bytes([10]) # Request RTS Signal State
+SET_CONTROL_RTS_ON = to_bytes([11]) # Set RTS Signal State ON
+SET_CONTROL_RTS_OFF = to_bytes([12]) # Set RTS Signal State OFF
+SET_CONTROL_REQ_FLOW_SETTING_IN = to_bytes([13]) # Request Com Port Flow Control Setting (inbound)
+SET_CONTROL_USE_NO_FLOW_CONTROL_IN = to_bytes([14]) # Use No Flow Control (inbound)
+SET_CONTROL_USE_SW_FLOW_CONTOL_IN = to_bytes([15]) # Use XON/XOFF Flow Control (inbound)
+SET_CONTROL_USE_HW_FLOW_CONTOL_IN = to_bytes([16]) # Use HARDWARE Flow Control (inbound)
+SET_CONTROL_USE_DCD_FLOW_CONTROL = to_bytes([17]) # Use DCD Flow Control (outbound/both)
+SET_CONTROL_USE_DTR_FLOW_CONTROL = to_bytes([18]) # Use DTR Flow Control (inbound)
+SET_CONTROL_USE_DSR_FLOW_CONTROL = to_bytes([19]) # Use DSR Flow Control (outbound/both)
+
+LINESTATE_MASK_TIMEOUT = 128 # Time-out Error
+LINESTATE_MASK_SHIFTREG_EMPTY = 64 # Transfer Shift Register Empty
+LINESTATE_MASK_TRANSREG_EMPTY = 32 # Transfer Holding Register Empty
+LINESTATE_MASK_BREAK_DETECT = 16 # Break-detect Error
+LINESTATE_MASK_FRAMING_ERROR = 8 # Framing Error
+LINESTATE_MASK_PARTIY_ERROR = 4 # Parity Error
+LINESTATE_MASK_OVERRUN_ERROR = 2 # Overrun Error
+LINESTATE_MASK_DATA_READY = 1 # Data Ready
+
+MODEMSTATE_MASK_CD = 128 # Receive Line Signal Detect (also known as Carrier Detect)
+MODEMSTATE_MASK_RI = 64 # Ring Indicator
+MODEMSTATE_MASK_DSR = 32 # Data-Set-Ready Signal State
+MODEMSTATE_MASK_CTS = 16 # Clear-To-Send Signal State
+MODEMSTATE_MASK_CD_CHANGE = 8 # Delta Receive Line Signal Detect
+MODEMSTATE_MASK_RI_CHANGE = 4 # Trailing-edge Ring Detector
+MODEMSTATE_MASK_DSR_CHANGE = 2 # Delta Data-Set-Ready
+MODEMSTATE_MASK_CTS_CHANGE = 1 # Delta Clear-To-Send
+
+PURGE_RECEIVE_BUFFER = to_bytes([1]) # Purge access server receive data buffer
+PURGE_TRANSMIT_BUFFER = to_bytes([2]) # Purge access server transmit data buffer
+PURGE_BOTH_BUFFERS = to_bytes([3]) # Purge both the access server receive data buffer and the access server transmit data buffer
+
+
+RFC2217_PARITY_MAP = {
+ PARITY_NONE: 1,
+ PARITY_ODD: 2,
+ PARITY_EVEN: 3,
+ PARITY_MARK: 4,
+ PARITY_SPACE: 5,
+}
+RFC2217_REVERSE_PARITY_MAP = dict((v,k) for k,v in RFC2217_PARITY_MAP.items())
+
+RFC2217_STOPBIT_MAP = {
+ STOPBITS_ONE: 1,
+ STOPBITS_ONE_POINT_FIVE: 3,
+ STOPBITS_TWO: 2,
+}
+RFC2217_REVERSE_STOPBIT_MAP = dict((v,k) for k,v in RFC2217_STOPBIT_MAP.items())
+
+# Telnet filter states
+M_NORMAL = 0
+M_IAC_SEEN = 1
+M_NEGOTIATE = 2
+
+# TelnetOption and TelnetSubnegotiation states
+REQUESTED = 'REQUESTED'
+ACTIVE = 'ACTIVE'
+INACTIVE = 'INACTIVE'
+REALLY_INACTIVE = 'REALLY_INACTIVE'
+
+class TelnetOption(object):
+ """Manage a single telnet option, keeps track of DO/DONT WILL/WONT."""
+
+ def __init__(self, connection, name, option, send_yes, send_no, ack_yes, ack_no, initial_state, activation_callback=None):
+ """\
+ Initialize option.
+ :param connection: connection used to transmit answers
+ :param name: a readable name for debug outputs
+ :param send_yes: what to send when option is to be enabled.
+ :param send_no: what to send when option is to be disabled.
+ :param ack_yes: what to expect when remote agrees on option.
+ :param ack_no: what to expect when remote disagrees on option.
+ :param initial_state: options initialized with REQUESTED are tried to
+ be enabled on startup. use INACTIVE for all others.
+ """
+ self.connection = connection
+ self.name = name
+ self.option = option
+ self.send_yes = send_yes
+ self.send_no = send_no
+ self.ack_yes = ack_yes
+ self.ack_no = ack_no
+ self.state = initial_state
+ self.active = False
+ self.activation_callback = activation_callback
+
+ def __repr__(self):
+ """String for debug outputs"""
+ return "%s:%s(%s)" % (self.name, self.active, self.state)
+
+ def process_incoming(self, command):
+ """\
+ A DO/DONT/WILL/WONT was received for this option, update state and
+ answer when needed.
+ """
+ if command == self.ack_yes:
+ if self.state is REQUESTED:
+ self.state = ACTIVE
+ self.active = True
+ if self.activation_callback is not None:
+ self.activation_callback()
+ elif self.state is ACTIVE:
+ pass
+ elif self.state is INACTIVE:
+ self.state = ACTIVE
+ self.connection.telnetSendOption(self.send_yes, self.option)
+ self.active = True
+ if self.activation_callback is not None:
+ self.activation_callback()
+ elif self.state is REALLY_INACTIVE:
+ self.connection.telnetSendOption(self.send_no, self.option)
+ else:
+ raise ValueError('option in illegal state %r' % self)
+ elif command == self.ack_no:
+ if self.state is REQUESTED:
+ self.state = INACTIVE
+ self.active = False
+ elif self.state is ACTIVE:
+ self.state = INACTIVE
+ self.connection.telnetSendOption(self.send_no, self.option)
+ self.active = False
+ elif self.state is INACTIVE:
+ pass
+ elif self.state is REALLY_INACTIVE:
+ pass
+ else:
+ raise ValueError('option in illegal state %r' % self)
+
+
+class TelnetSubnegotiation(object):
+ """\
+ A object to handle subnegotiation of options. In this case actually
+ sub-sub options for RFC 2217. It is used to track com port options.
+ """
+
+ def __init__(self, connection, name, option, ack_option=None):
+ if ack_option is None: ack_option = option
+ self.connection = connection
+ self.name = name
+ self.option = option
+ self.value = None
+ self.ack_option = ack_option
+ self.state = INACTIVE
+
+ def __repr__(self):
+ """String for debug outputs."""
+ return "%s:%s" % (self.name, self.state)
+
+ def set(self, value):
+ """\
+ Request a change of the value. a request is sent to the server. if
+ the client needs to know if the change is performed he has to check the
+ state of this object.
+ """
+ self.value = value
+ self.state = REQUESTED
+ self.connection.rfc2217SendSubnegotiation(self.option, self.value)
+ if self.connection.logger:
+ self.connection.logger.debug("SB Requesting %s -> %r" % (self.name, self.value))
+
+ def isReady(self):
+ """\
+ Check if answer from server has been received. when server rejects
+ the change, raise a ValueError.
+ """
+ if self.state == REALLY_INACTIVE:
+ raise ValueError("remote rejected value for option %r" % (self.name))
+ return self.state == ACTIVE
+ # add property to have a similar interface as TelnetOption
+ active = property(isReady)
+
+ def wait(self, timeout=3):
+ """\
+ Wait until the subnegotiation has been acknowledged or timeout. It
+ can also throw a value error when the answer from the server does not
+ match the value sent.
+ """
+ timeout_time = time.time() + timeout
+ while time.time() < timeout_time:
+ time.sleep(0.05) # prevent 100% CPU load
+ if self.isReady():
+ break
+ else:
+ raise SerialException("timeout while waiting for option %r" % (self.name))
+
+ def checkAnswer(self, suboption):
+ """\
+ Check an incoming subnegotiation block. The parameter already has
+ cut off the header like sub option number and com port option value.
+ """
+ if self.value == suboption[:len(self.value)]:
+ self.state = ACTIVE
+ else:
+ # error propagation done in isReady
+ self.state = REALLY_INACTIVE
+ if self.connection.logger:
+ self.connection.logger.debug("SB Answer %s -> %r -> %s" % (self.name, suboption, self.state))
+
+
+class RFC2217Serial(SerialBase):
+ """Serial port implementation for RFC 2217 remote serial ports."""
+
+ BAUDRATES = (50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
+ 9600, 19200, 38400, 57600, 115200)
+
+ def open(self):
+ """\
+ Open port with current settings. This may throw a SerialException
+ if the port cannot be opened.
+ """
+ self.logger = None
+ self._ignore_set_control_answer = False
+ self._poll_modem_state = False
+ self._network_timeout = 3
+ if self._port is None:
+ raise SerialException("Port must be configured before it can be used.")
+ if self._isOpen:
+ raise SerialException("Port is already open.")
+ try:
+ self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+ self._socket.connect(self.fromURL(self.portstr))
+ self._socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
+ except Exception, msg:
+ self._socket = None
+ raise SerialException("Could not open port %s: %s" % (self.portstr, msg))
+
+ self._socket.settimeout(5) # XXX good value?
+
+ # use a thread save queue as buffer. it also simplifies implementing
+ # the read timeout
+ self._read_buffer = Queue.Queue()
+ # to ensure that user writes does not interfere with internal
+ # telnet/rfc2217 options establish a lock
+ self._write_lock = threading.Lock()
+ # name the following separately so that, below, a check can be easily done
+ mandadory_options = [
+ TelnetOption(self, 'we-BINARY', BINARY, WILL, WONT, DO, DONT, INACTIVE),
+ TelnetOption(self, 'we-RFC2217', COM_PORT_OPTION, WILL, WONT, DO, DONT, REQUESTED),
+ ]
+ # all supported telnet options
+ self._telnet_options = [
+ TelnetOption(self, 'ECHO', ECHO, DO, DONT, WILL, WONT, REQUESTED),
+ TelnetOption(self, 'we-SGA', SGA, WILL, WONT, DO, DONT, REQUESTED),
+ TelnetOption(self, 'they-SGA', SGA, DO, DONT, WILL, WONT, REQUESTED),
+ TelnetOption(self, 'they-BINARY', BINARY, DO, DONT, WILL, WONT, INACTIVE),
+ TelnetOption(self, 'they-RFC2217', COM_PORT_OPTION, DO, DONT, WILL, WONT, REQUESTED),
+ ] + mandadory_options
+ # RFC 2217 specific states
+ # COM port settings
+ self._rfc2217_port_settings = {
+ 'baudrate': TelnetSubnegotiation(self, 'baudrate', SET_BAUDRATE, SERVER_SET_BAUDRATE),
+ 'datasize': TelnetSubnegotiation(self, 'datasize', SET_DATASIZE, SERVER_SET_DATASIZE),
+ 'parity': TelnetSubnegotiation(self, 'parity', SET_PARITY, SERVER_SET_PARITY),
+ 'stopsize': TelnetSubnegotiation(self, 'stopsize', SET_STOPSIZE, SERVER_SET_STOPSIZE),
+ }
+ # There are more subnegotiation objects, combine all in one dictionary
+ # for easy access
+ self._rfc2217_options = {
+ 'purge': TelnetSubnegotiation(self, 'purge', PURGE_DATA, SERVER_PURGE_DATA),
+ 'control': TelnetSubnegotiation(self, 'control', SET_CONTROL, SERVER_SET_CONTROL),
+ }
+ self._rfc2217_options.update(self._rfc2217_port_settings)
+ # cache for line and modem states that the server sends to us
+ self._linestate = 0
+ self._modemstate = None
+ self._modemstate_expires = 0
+ # RFC 2217 flow control between server and client
+ self._remote_suspend_flow = False
+
+ self._thread = threading.Thread(target=self._telnetReadLoop)
+ self._thread.setDaemon(True)
+ self._thread.setName('pySerial RFC 2217 reader thread for %s' % (self._port,))
+ self._thread.start()
+
+ # negotiate Telnet/RFC 2217 -> send initial requests
+ for option in self._telnet_options:
+ if option.state is REQUESTED:
+ self.telnetSendOption(option.send_yes, option.option)
+ # now wait until important options are negotiated
+ timeout_time = time.time() + self._network_timeout
+ while time.time() < timeout_time:
+ time.sleep(0.05) # prevent 100% CPU load
+ if sum(o.active for o in mandadory_options) == sum(o.state != INACTIVE for o in mandadory_options):
+ break
+ else:
+ raise SerialException("Remote does not seem to support RFC2217 or BINARY mode %r" % mandadory_options)
+ if self.logger:
+ self.logger.info("Negotiated options: %s" % self._telnet_options)
+
+ # fine, go on, set RFC 2271 specific things
+ self._reconfigurePort()
+ # all things set up get, now a clean start
+ self._isOpen = True
+ if not self._rtscts:
+ self.setRTS(True)
+ self.setDTR(True)
+ self.flushInput()
+ self.flushOutput()
+
+ def _reconfigurePort(self):
+ """Set communication parameters on opened port."""
+ if self._socket is None:
+ raise SerialException("Can only operate on open ports")
+
+ # if self._timeout != 0 and self._interCharTimeout is not None:
+ # XXX
+
+ if self._writeTimeout is not None:
+ raise NotImplementedError('writeTimeout is currently not supported')
+ # XXX
+
+ # Setup the connection
+ # to get good performance, all parameter changes are sent first...
+ if not isinstance(self._baudrate, (int, long)) or not 0 < self._baudrate < 2**32:
+ raise ValueError("invalid baudrate: %r" % (self._baudrate))
+ self._rfc2217_port_settings['baudrate'].set(struct.pack('!I', self._baudrate))
+ self._rfc2217_port_settings['datasize'].set(struct.pack('!B', self._bytesize))
+ self._rfc2217_port_settings['parity'].set(struct.pack('!B', RFC2217_PARITY_MAP[self._parity]))
+ self._rfc2217_port_settings['stopsize'].set(struct.pack('!B', RFC2217_STOPBIT_MAP[self._stopbits]))
+
+ # and now wait until parameters are active
+ items = self._rfc2217_port_settings.values()
+ if self.logger:
+ self.logger.debug("Negotiating settings: %s" % (items,))
+ timeout_time = time.time() + self._network_timeout
+ while time.time() < timeout_time:
+ time.sleep(0.05) # prevent 100% CPU load
+ if sum(o.active for o in items) == len(items):
+ break
+ else:
+ raise SerialException("Remote does not accept parameter change (RFC2217): %r" % items)
+ if self.logger:
+ self.logger.info("Negotiated settings: %s" % (items,))
+
+ if self._rtscts and self._xonxoff:
+ raise ValueError('xonxoff and rtscts together are not supported')
+ elif self._rtscts:
+ self.rfc2217SetControl(SET_CONTROL_USE_HW_FLOW_CONTROL)
+ elif self._xonxoff:
+ self.rfc2217SetControl(SET_CONTROL_USE_SW_FLOW_CONTROL)
+ else:
+ self.rfc2217SetControl(SET_CONTROL_USE_NO_FLOW_CONTROL)
+
+ def close(self):
+ """Close port"""
+ if self._isOpen:
+ if self._socket:
+ try:
+ self._socket.shutdown(socket.SHUT_RDWR)
+ self._socket.close()
+ except:
+ # ignore errors.
+ pass
+ self._socket = None
+ if self._thread:
+ self._thread.join()
+ self._isOpen = False
+ # in case of quick reconnects, give the server some time
+ time.sleep(0.3)
+
+ def makeDeviceName(self, port):
+ raise SerialException("there is no sensible way to turn numbers into URLs")
+
+ def fromURL(self, url):
+ """extract host and port from an URL string"""
+ if url.lower().startswith("rfc2217://"): url = url[10:]
+ try:
+ # is there a "path" (our options)?
+ if '/' in url:
+ # cut away options
+ url, options = url.split('/', 1)
+ # process options now, directly altering self
+ for option in options.split('/'):
+ if '=' in option:
+ option, value = option.split('=', 1)
+ else:
+ value = None
+ if option == 'logging':
+ logging.basicConfig() # XXX is that good to call it here?
+ self.logger = logging.getLogger('pySerial.rfc2217')
+ self.logger.setLevel(LOGGER_LEVELS[value])
+ self.logger.debug('enabled logging')
+ elif option == 'ign_set_control':
+ self._ignore_set_control_answer = True
+ elif option == 'poll_modem':
+ self._poll_modem_state = True
+ elif option == 'timeout':
+ self._network_timeout = float(value)
+ else:
+ raise ValueError('unknown option: %r' % (option,))
+ # get host and port
+ host, port = url.split(':', 1) # may raise ValueError because of unpacking
+ port = int(port) # and this if it's not a number
+ if not 0 <= port < 65536: raise ValueError("port not in range 0...65535")
+ except ValueError, e:
+ raise SerialException('expected a string in the form "[rfc2217://]<host>:<port>[/option[/option...]]": %s' % e)
+ return (host, port)
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ def inWaiting(self):
+ """Return the number of characters currently in the input buffer."""
+ if not self._isOpen: raise portNotOpenError
+ return self._read_buffer.qsize()
+
+ def read(self, size=1):
+ """\
+ Read size bytes from the serial port. If a timeout is set it may
+ return less characters as requested. With no timeout it will block
+ until the requested number of bytes is read.
+ """
+ if not self._isOpen: raise portNotOpenError
+ data = bytearray()
+ try:
+ while len(data) < size:
+ if self._thread is None:
+ raise SerialException('connection failed (reader thread died)')
+ data.append(self._read_buffer.get(True, self._timeout))
+ except Queue.Empty: # -> timeout
+ pass
+ return bytes(data)
+
+ def write(self, data):
+ """\
+ Output the given string over the serial port. Can block if the
+ connection is blocked. May raise SerialException if the connection is
+ closed.
+ """
+ if not self._isOpen: raise portNotOpenError
+ self._write_lock.acquire()
+ try:
+ try:
+ self._socket.sendall(to_bytes(data).replace(IAC, IAC_DOUBLED))
+ except socket.error, e:
+ raise SerialException("connection failed (socket error): %s" % e) # XXX what exception if socket connection fails
+ finally:
+ self._write_lock.release()
+ return len(data)
+
+ def flushInput(self):
+ """Clear input buffer, discarding all that is in the buffer."""
+ if not self._isOpen: raise portNotOpenError
+ self.rfc2217SendPurge(PURGE_RECEIVE_BUFFER)
+ # empty read buffer
+ while self._read_buffer.qsize():
+ self._read_buffer.get(False)
+
+ def flushOutput(self):
+ """\
+ Clear output buffer, aborting the current output and
+ discarding all that is in the buffer.
+ """
+ if not self._isOpen: raise portNotOpenError
+ self.rfc2217SendPurge(PURGE_TRANSMIT_BUFFER)
+
+ def sendBreak(self, duration=0.25):
+ """\
+ Send break condition. Timed, returns to idle state after given
+ duration.
+ """
+ if not self._isOpen: raise portNotOpenError
+ self.setBreak(True)
+ time.sleep(duration)
+ self.setBreak(False)
+
+ def setBreak(self, level=True):
+ """\
+ Set break: Controls TXD. When active, to transmitting is
+ possible.
+ """
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('set BREAK to %s' % ('inactive', 'active')[bool(level)])
+ if level:
+ self.rfc2217SetControl(SET_CONTROL_BREAK_ON)
+ else:
+ self.rfc2217SetControl(SET_CONTROL_BREAK_OFF)
+
+ def setRTS(self, level=True):
+ """Set terminal status line: Request To Send."""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('set RTS to %s' % ('inactive', 'active')[bool(level)])
+ if level:
+ self.rfc2217SetControl(SET_CONTROL_RTS_ON)
+ else:
+ self.rfc2217SetControl(SET_CONTROL_RTS_OFF)
+
+ def setDTR(self, level=True):
+ """Set terminal status line: Data Terminal Ready."""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('set DTR to %s' % ('inactive', 'active')[bool(level)])
+ if level:
+ self.rfc2217SetControl(SET_CONTROL_DTR_ON)
+ else:
+ self.rfc2217SetControl(SET_CONTROL_DTR_OFF)
+
+ def getCTS(self):
+ """Read terminal status line: Clear To Send."""
+ if not self._isOpen: raise portNotOpenError
+ return bool(self.getModemState() & MODEMSTATE_MASK_CTS)
+
+ def getDSR(self):
+ """Read terminal status line: Data Set Ready."""
+ if not self._isOpen: raise portNotOpenError
+ return bool(self.getModemState() & MODEMSTATE_MASK_DSR)
+
+ def getRI(self):
+ """Read terminal status line: Ring Indicator."""
+ if not self._isOpen: raise portNotOpenError
+ return bool(self.getModemState() & MODEMSTATE_MASK_RI)
+
+ def getCD(self):
+ """Read terminal status line: Carrier Detect."""
+ if not self._isOpen: raise portNotOpenError
+ return bool(self.getModemState() & MODEMSTATE_MASK_CD)
+
+ # - - - platform specific - - -
+ # None so far
+
+ # - - - RFC2217 specific - - -
+
+ def _telnetReadLoop(self):
+ """Read loop for the socket."""
+ mode = M_NORMAL
+ suboption = None
+ try:
+ while self._socket is not None:
+ try:
+ data = self._socket.recv(1024)
+ except socket.timeout:
+ # just need to get out of recv form time to time to check if
+ # still alive
+ continue
+ except socket.error, e:
+ # connection fails -> terminate loop
+ if self.logger:
+ self.logger.debug("socket error in reader thread: %s" % (e,))
+ break
+ if not data: break # lost connection
+ for byte in data:
+ if mode == M_NORMAL:
+ # interpret as command or as data
+ if byte == IAC:
+ mode = M_IAC_SEEN
+ else:
+ # store data in read buffer or sub option buffer
+ # depending on state
+ if suboption is not None:
+ suboption.append(byte)
+ else:
+ self._read_buffer.put(byte)
+ elif mode == M_IAC_SEEN:
+ if byte == IAC:
+ # interpret as command doubled -> insert character
+ # itself
+ if suboption is not None:
+ suboption.append(IAC)
+ else:
+ self._read_buffer.put(IAC)
+ mode = M_NORMAL
+ elif byte == SB:
+ # sub option start
+ suboption = bytearray()
+ mode = M_NORMAL
+ elif byte == SE:
+ # sub option end -> process it now
+ self._telnetProcessSubnegotiation(bytes(suboption))
+ suboption = None
+ mode = M_NORMAL
+ elif byte in (DO, DONT, WILL, WONT):
+ # negotiation
+ telnet_command = byte
+ mode = M_NEGOTIATE
+ else:
+ # other telnet commands
+ self._telnetProcessCommand(byte)
+ mode = M_NORMAL
+ elif mode == M_NEGOTIATE: # DO, DONT, WILL, WONT was received, option now following
+ self._telnetNegotiateOption(telnet_command, byte)
+ mode = M_NORMAL
+ finally:
+ self._thread = None
+ if self.logger:
+ self.logger.debug("read thread terminated")
+
+ # - incoming telnet commands and options
+
+ def _telnetProcessCommand(self, command):
+ """Process commands other than DO, DONT, WILL, WONT."""
+ # Currently none. RFC2217 only uses negotiation and subnegotiation.
+ if self.logger:
+ self.logger.warning("ignoring Telnet command: %r" % (command,))
+
+ def _telnetNegotiateOption(self, command, option):
+ """Process incoming DO, DONT, WILL, WONT."""
+ # check our registered telnet options and forward command to them
+ # they know themselves if they have to answer or not
+ known = False
+ for item in self._telnet_options:
+ # can have more than one match! as some options are duplicated for
+ # 'us' and 'them'
+ if item.option == option:
+ item.process_incoming(command)
+ known = True
+ if not known:
+ # handle unknown options
+ # only answer to positive requests and deny them
+ if command == WILL or command == DO:
+ self.telnetSendOption((command == WILL and DONT or WONT), option)
+ if self.logger:
+ self.logger.warning("rejected Telnet option: %r" % (option,))
+
+
+ def _telnetProcessSubnegotiation(self, suboption):
+ """Process subnegotiation, the data between IAC SB and IAC SE."""
+ if suboption[0:1] == COM_PORT_OPTION:
+ if suboption[1:2] == SERVER_NOTIFY_LINESTATE and len(suboption) >= 3:
+ self._linestate = ord(suboption[2:3]) # ensure it is a number
+ if self.logger:
+ self.logger.info("NOTIFY_LINESTATE: %s" % self._linestate)
+ elif suboption[1:2] == SERVER_NOTIFY_MODEMSTATE and len(suboption) >= 3:
+ self._modemstate = ord(suboption[2:3]) # ensure it is a number
+ if self.logger:
+ self.logger.info("NOTIFY_MODEMSTATE: %s" % self._modemstate)
+ # update time when we think that a poll would make sense
+ self._modemstate_expires = time.time() + 0.3
+ elif suboption[1:2] == FLOWCONTROL_SUSPEND:
+ self._remote_suspend_flow = True
+ elif suboption[1:2] == FLOWCONTROL_RESUME:
+ self._remote_suspend_flow = False
+ else:
+ for item in self._rfc2217_options.values():
+ if item.ack_option == suboption[1:2]:
+ #~ print "processing COM_PORT_OPTION: %r" % list(suboption[1:])
+ item.checkAnswer(bytes(suboption[2:]))
+ break
+ else:
+ if self.logger:
+ self.logger.warning("ignoring COM_PORT_OPTION: %r" % (suboption,))
+ else:
+ if self.logger:
+ self.logger.warning("ignoring subnegotiation: %r" % (suboption,))
+
+ # - outgoing telnet commands and options
+
+ def _internal_raw_write(self, data):
+ """internal socket write with no data escaping. used to send telnet stuff."""
+ self._write_lock.acquire()
+ try:
+ self._socket.sendall(data)
+ finally:
+ self._write_lock.release()
+
+ def telnetSendOption(self, action, option):
+ """Send DO, DONT, WILL, WONT."""
+ self._internal_raw_write(to_bytes([IAC, action, option]))
+
+ def rfc2217SendSubnegotiation(self, option, value=''):
+ """Subnegotiation of RFC2217 parameters."""
+ value = value.replace(IAC, IAC_DOUBLED)
+ self._internal_raw_write(to_bytes([IAC, SB, COM_PORT_OPTION, option] + list(value) + [IAC, SE]))
+
+ def rfc2217SendPurge(self, value):
+ item = self._rfc2217_options['purge']
+ item.set(value) # transmit desired purge type
+ item.wait(self._network_timeout) # wait for acknowledge from the server
+
+ def rfc2217SetControl(self, value):
+ item = self._rfc2217_options['control']
+ item.set(value) # transmit desired control type
+ if self._ignore_set_control_answer:
+ # answers are ignored when option is set. compatibility mode for
+ # servers that answer, but not the expected one... (or no answer
+ # at all) i.e. sredird
+ time.sleep(0.1) # this helps getting the unit tests passed
+ else:
+ item.wait(self._network_timeout) # wait for acknowledge from the server
+
+ def rfc2217FlowServerReady(self):
+ """\
+ check if server is ready to receive data. block for some time when
+ not.
+ """
+ #~ if self._remote_suspend_flow:
+ #~ wait---
+
+ def getModemState(self):
+ """\
+ get last modem state (cached value. If value is "old", request a new
+ one. This cache helps that we don't issue to many requests when e.g. all
+ status lines, one after the other is queried by the user (getCTS, getDSR
+ etc.)
+ """
+ # active modem state polling enabled? is the value fresh enough?
+ if self._poll_modem_state and self._modemstate_expires < time.time():
+ if self.logger:
+ self.logger.debug('polling modem state')
+ # when it is older, request an update
+ self.rfc2217SendSubnegotiation(NOTIFY_MODEMSTATE)
+ timeout_time = time.time() + self._network_timeout
+ while time.time() < timeout_time:
+ time.sleep(0.05) # prevent 100% CPU load
+ # when expiration time is updated, it means that there is a new
+ # value
+ if self._modemstate_expires > time.time():
+ if self.logger:
+ self.logger.warning('poll for modem state failed')
+ break
+ # even when there is a timeout, do not generate an error just
+ # return the last known value. this way we can support buggy
+ # servers that do not respond to polls, but send automatic
+ # updates.
+ if self._modemstate is not None:
+ if self.logger:
+ self.logger.debug('using cached modem state')
+ return self._modemstate
+ else:
+ # never received a notification from the server
+ raise SerialException("remote sends no NOTIFY_MODEMSTATE")
+
+
+# assemble Serial class with the platform specific implementation and the base
+# for file-like behavior. for Python 2.6 and newer, that provide the new I/O
+# library, derive from io.RawIOBase
+try:
+ import io
+except ImportError:
+ # classic version with our own file-like emulation
+ class Serial(RFC2217Serial, FileLike):
+ pass
+else:
+ # io library present
+ class Serial(RFC2217Serial, io.RawIOBase):
+ pass
+
+
+#############################################################################
+# The following is code that helps implementing an RFC 2217 server.
+
+class PortManager(object):
+ """\
+ This class manages the state of Telnet and RFC 2217. It needs a serial
+ instance and a connection to work with. Connection is expected to implement
+ a (thread safe) write function, that writes the string to the network.
+ """
+
+ def __init__(self, serial_port, connection, logger=None):
+ self.serial = serial_port
+ self.connection = connection
+ self.logger = logger
+ self._client_is_rfc2217 = False
+
+ # filter state machine
+ self.mode = M_NORMAL
+ self.suboption = None
+ self.telnet_command = None
+
+ # states for modem/line control events
+ self.modemstate_mask = 255
+ self.last_modemstate = None
+ self.linstate_mask = 0
+
+ # all supported telnet options
+ self._telnet_options = [
+ TelnetOption(self, 'ECHO', ECHO, WILL, WONT, DO, DONT, REQUESTED),
+ TelnetOption(self, 'we-SGA', SGA, WILL, WONT, DO, DONT, REQUESTED),
+ TelnetOption(self, 'they-SGA', SGA, DO, DONT, WILL, WONT, INACTIVE),
+ TelnetOption(self, 'we-BINARY', BINARY, WILL, WONT, DO, DONT, INACTIVE),
+ TelnetOption(self, 'they-BINARY', BINARY, DO, DONT, WILL, WONT, REQUESTED),
+ TelnetOption(self, 'we-RFC2217', COM_PORT_OPTION, WILL, WONT, DO, DONT, REQUESTED, self._client_ok),
+ TelnetOption(self, 'they-RFC2217', COM_PORT_OPTION, DO, DONT, WILL, WONT, INACTIVE, self._client_ok),
+ ]
+
+ # negotiate Telnet/RFC2217 -> send initial requests
+ if self.logger:
+ self.logger.debug("requesting initial Telnet/RFC 2217 options")
+ for option in self._telnet_options:
+ if option.state is REQUESTED:
+ self.telnetSendOption(option.send_yes, option.option)
+ # issue 1st modem state notification
+
+ def _client_ok(self):
+ """\
+ callback of telnet option. It gets called when option is activated.
+ This one here is used to detect when the client agrees on RFC 2217. A
+ flag is set so that other functions like check_modem_lines know if the
+ client is OK.
+ """
+ # The callback is used for we and they so if one party agrees, we're
+ # already happy. it seems not all servers do the negotiation correctly
+ # and i guess there are incorrect clients too.. so be happy if client
+ # answers one or the other positively.
+ self._client_is_rfc2217 = True
+ if self.logger:
+ self.logger.info("client accepts RFC 2217")
+ # this is to ensure that the client gets a notification, even if there
+ # was no change
+ self.check_modem_lines(force_notification=True)
+
+ # - outgoing telnet commands and options
+
+ def telnetSendOption(self, action, option):
+ """Send DO, DONT, WILL, WONT."""
+ self.connection.write(to_bytes([IAC, action, option]))
+
+ def rfc2217SendSubnegotiation(self, option, value=''):
+ """Subnegotiation of RFC 2217 parameters."""
+ value = value.replace(IAC, IAC_DOUBLED)
+ self.connection.write(to_bytes([IAC, SB, COM_PORT_OPTION, option] + list(value) + [IAC, SE]))
+
+ # - check modem lines, needs to be called periodically from user to
+ # establish polling
+
+ def check_modem_lines(self, force_notification=False):
+ modemstate = (
+ (self.serial.getCTS() and MODEMSTATE_MASK_CTS) |
+ (self.serial.getDSR() and MODEMSTATE_MASK_DSR) |
+ (self.serial.getRI() and MODEMSTATE_MASK_RI) |
+ (self.serial.getCD() and MODEMSTATE_MASK_CD)
+ )
+ # check what has changed
+ deltas = modemstate ^ (self.last_modemstate or 0) # when last is None -> 0
+ if deltas & MODEMSTATE_MASK_CTS:
+ modemstate |= MODEMSTATE_MASK_CTS_CHANGE
+ if deltas & MODEMSTATE_MASK_DSR:
+ modemstate |= MODEMSTATE_MASK_DSR_CHANGE
+ if deltas & MODEMSTATE_MASK_RI:
+ modemstate |= MODEMSTATE_MASK_RI_CHANGE
+ if deltas & MODEMSTATE_MASK_CD:
+ modemstate |= MODEMSTATE_MASK_CD_CHANGE
+ # if new state is different and the mask allows this change, send
+ # notification. suppress notifications when client is not rfc2217
+ if modemstate != self.last_modemstate or force_notification:
+ if (self._client_is_rfc2217 and (modemstate & self.modemstate_mask)) or force_notification:
+ self.rfc2217SendSubnegotiation(
+ SERVER_NOTIFY_MODEMSTATE,
+ to_bytes([modemstate & self.modemstate_mask])
+ )
+ if self.logger:
+ self.logger.info("NOTIFY_MODEMSTATE: %s" % (modemstate,))
+ # save last state, but forget about deltas.
+ # otherwise it would also notify about changing deltas which is
+ # probably not very useful
+ self.last_modemstate = modemstate & 0xf0
+
+ # - outgoing data escaping
+
+ def escape(self, data):
+ """\
+ This generator function is for the user. All outgoing data has to be
+ properly escaped, so that no IAC character in the data stream messes up
+ the Telnet state machine in the server.
+
+ socket.sendall(escape(data))
+ """
+ for byte in data:
+ if byte == IAC:
+ yield IAC
+ yield IAC
+ else:
+ yield byte
+
+ # - incoming data filter
+
+ def filter(self, data):
+ """\
+ Handle a bunch of incoming bytes. This is a generator. It will yield
+ all characters not of interest for Telnet/RFC 2217.
+
+ The idea is that the reader thread pushes data from the socket through
+ this filter:
+
+ for byte in filter(socket.recv(1024)):
+ # do things like CR/LF conversion/whatever
+ # and write data to the serial port
+ serial.write(byte)
+
+ (socket error handling code left as exercise for the reader)
+ """
+ for byte in data:
+ if self.mode == M_NORMAL:
+ # interpret as command or as data
+ if byte == IAC:
+ self.mode = M_IAC_SEEN
+ else:
+ # store data in sub option buffer or pass it to our
+ # consumer depending on state
+ if self.suboption is not None:
+ self.suboption.append(byte)
+ else:
+ yield byte
+ elif self.mode == M_IAC_SEEN:
+ if byte == IAC:
+ # interpret as command doubled -> insert character
+ # itself
+ if self.suboption is not None:
+ self.suboption.append(byte)
+ else:
+ yield byte
+ self.mode = M_NORMAL
+ elif byte == SB:
+ # sub option start
+ self.suboption = bytearray()
+ self.mode = M_NORMAL
+ elif byte == SE:
+ # sub option end -> process it now
+ self._telnetProcessSubnegotiation(bytes(self.suboption))
+ self.suboption = None
+ self.mode = M_NORMAL
+ elif byte in (DO, DONT, WILL, WONT):
+ # negotiation
+ self.telnet_command = byte
+ self.mode = M_NEGOTIATE
+ else:
+ # other telnet commands
+ self._telnetProcessCommand(byte)
+ self.mode = M_NORMAL
+ elif self.mode == M_NEGOTIATE: # DO, DONT, WILL, WONT was received, option now following
+ self._telnetNegotiateOption(self.telnet_command, byte)
+ self.mode = M_NORMAL
+
+ # - incoming telnet commands and options
+
+ def _telnetProcessCommand(self, command):
+ """Process commands other than DO, DONT, WILL, WONT."""
+ # Currently none. RFC2217 only uses negotiation and subnegotiation.
+ if self.logger:
+ self.logger.warning("ignoring Telnet command: %r" % (command,))
+
+ def _telnetNegotiateOption(self, command, option):
+ """Process incoming DO, DONT, WILL, WONT."""
+ # check our registered telnet options and forward command to them
+ # they know themselves if they have to answer or not
+ known = False
+ for item in self._telnet_options:
+ # can have more than one match! as some options are duplicated for
+ # 'us' and 'them'
+ if item.option == option:
+ item.process_incoming(command)
+ known = True
+ if not known:
+ # handle unknown options
+ # only answer to positive requests and deny them
+ if command == WILL or command == DO:
+ self.telnetSendOption((command == WILL and DONT or WONT), option)
+ if self.logger:
+ self.logger.warning("rejected Telnet option: %r" % (option,))
+
+
+ def _telnetProcessSubnegotiation(self, suboption):
+ """Process subnegotiation, the data between IAC SB and IAC SE."""
+ if suboption[0:1] == COM_PORT_OPTION:
+ if self.logger:
+ self.logger.debug('received COM_PORT_OPTION: %r' % (suboption,))
+ if suboption[1:2] == SET_BAUDRATE:
+ backup = self.serial.baudrate
+ try:
+ (baudrate,) = struct.unpack("!I", suboption[2:6])
+ if baudrate != 0:
+ self.serial.baudrate = baudrate
+ except ValueError, e:
+ if self.logger:
+ self.logger.error("failed to set baud rate: %s" % (e,))
+ self.serial.baudrate = backup
+ else:
+ if self.logger:
+ self.logger.info("%s baud rate: %s" % (baudrate and 'set' or 'get', self.serial.baudrate))
+ self.rfc2217SendSubnegotiation(SERVER_SET_BAUDRATE, struct.pack("!I", self.serial.baudrate))
+ elif suboption[1:2] == SET_DATASIZE:
+ backup = self.serial.bytesize
+ try:
+ (datasize,) = struct.unpack("!B", suboption[2:3])
+ if datasize != 0:
+ self.serial.bytesize = datasize
+ except ValueError, e:
+ if self.logger:
+ self.logger.error("failed to set data size: %s" % (e,))
+ self.serial.bytesize = backup
+ else:
+ if self.logger:
+ self.logger.info("%s data size: %s" % (datasize and 'set' or 'get', self.serial.bytesize))
+ self.rfc2217SendSubnegotiation(SERVER_SET_DATASIZE, struct.pack("!B", self.serial.bytesize))
+ elif suboption[1:2] == SET_PARITY:
+ backup = self.serial.parity
+ try:
+ parity = struct.unpack("!B", suboption[2:3])[0]
+ if parity != 0:
+ self.serial.parity = RFC2217_REVERSE_PARITY_MAP[parity]
+ except ValueError, e:
+ if self.logger:
+ self.logger.error("failed to set parity: %s" % (e,))
+ self.serial.parity = backup
+ else:
+ if self.logger:
+ self.logger.info("%s parity: %s" % (parity and 'set' or 'get', self.serial.parity))
+ self.rfc2217SendSubnegotiation(
+ SERVER_SET_PARITY,
+ struct.pack("!B", RFC2217_PARITY_MAP[self.serial.parity])
+ )
+ elif suboption[1:2] == SET_STOPSIZE:
+ backup = self.serial.stopbits
+ try:
+ stopbits = struct.unpack("!B", suboption[2:3])[0]
+ if stopbits != 0:
+ self.serial.stopbits = RFC2217_REVERSE_STOPBIT_MAP[stopbits]
+ except ValueError, e:
+ if self.logger:
+ self.logger.error("failed to set stop bits: %s" % (e,))
+ self.serial.stopbits = backup
+ else:
+ if self.logger:
+ self.logger.info("%s stop bits: %s" % (stopbits and 'set' or 'get', self.serial.stopbits))
+ self.rfc2217SendSubnegotiation(
+ SERVER_SET_STOPSIZE,
+ struct.pack("!B", RFC2217_STOPBIT_MAP[self.serial.stopbits])
+ )
+ elif suboption[1:2] == SET_CONTROL:
+ if suboption[2:3] == SET_CONTROL_REQ_FLOW_SETTING:
+ if self.serial.xonxoff:
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_USE_SW_FLOW_CONTROL)
+ elif self.serial.rtscts:
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_USE_HW_FLOW_CONTROL)
+ else:
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_USE_NO_FLOW_CONTROL)
+ elif suboption[2:3] == SET_CONTROL_USE_NO_FLOW_CONTROL:
+ self.serial.xonxoff = False
+ self.serial.rtscts = False
+ if self.logger:
+ self.logger.info("changed flow control to None")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_USE_NO_FLOW_CONTROL)
+ elif suboption[2:3] == SET_CONTROL_USE_SW_FLOW_CONTROL:
+ self.serial.xonxoff = True
+ if self.logger:
+ self.logger.info("changed flow control to XON/XOFF")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_USE_SW_FLOW_CONTROL)
+ elif suboption[2:3] == SET_CONTROL_USE_HW_FLOW_CONTROL:
+ self.serial.rtscts = True
+ if self.logger:
+ self.logger.info("changed flow control to RTS/CTS")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_USE_HW_FLOW_CONTROL)
+ elif suboption[2:3] == SET_CONTROL_REQ_BREAK_STATE:
+ if self.logger:
+ self.logger.warning("requested break state - not implemented")
+ pass # XXX needs cached value
+ elif suboption[2:3] == SET_CONTROL_BREAK_ON:
+ self.serial.setBreak(True)
+ if self.logger:
+ self.logger.info("changed BREAK to active")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_BREAK_ON)
+ elif suboption[2:3] == SET_CONTROL_BREAK_OFF:
+ self.serial.setBreak(False)
+ if self.logger:
+ self.logger.info("changed BREAK to inactive")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_BREAK_OFF)
+ elif suboption[2:3] == SET_CONTROL_REQ_DTR:
+ if self.logger:
+ self.logger.warning("requested DTR state - not implemented")
+ pass # XXX needs cached value
+ elif suboption[2:3] == SET_CONTROL_DTR_ON:
+ self.serial.setDTR(True)
+ if self.logger:
+ self.logger.info("changed DTR to active")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_DTR_ON)
+ elif suboption[2:3] == SET_CONTROL_DTR_OFF:
+ self.serial.setDTR(False)
+ if self.logger:
+ self.logger.info("changed DTR to inactive")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_DTR_OFF)
+ elif suboption[2:3] == SET_CONTROL_REQ_RTS:
+ if self.logger:
+ self.logger.warning("requested RTS state - not implemented")
+ pass # XXX needs cached value
+ #~ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_RTS_ON)
+ elif suboption[2:3] == SET_CONTROL_RTS_ON:
+ self.serial.setRTS(True)
+ if self.logger:
+ self.logger.info("changed RTS to active")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_RTS_ON)
+ elif suboption[2:3] == SET_CONTROL_RTS_OFF:
+ self.serial.setRTS(False)
+ if self.logger:
+ self.logger.info("changed RTS to inactive")
+ self.rfc2217SendSubnegotiation(SERVER_SET_CONTROL, SET_CONTROL_RTS_OFF)
+ #~ elif suboption[2:3] == SET_CONTROL_REQ_FLOW_SETTING_IN:
+ #~ elif suboption[2:3] == SET_CONTROL_USE_NO_FLOW_CONTROL_IN:
+ #~ elif suboption[2:3] == SET_CONTROL_USE_SW_FLOW_CONTOL_IN:
+ #~ elif suboption[2:3] == SET_CONTROL_USE_HW_FLOW_CONTOL_IN:
+ #~ elif suboption[2:3] == SET_CONTROL_USE_DCD_FLOW_CONTROL:
+ #~ elif suboption[2:3] == SET_CONTROL_USE_DTR_FLOW_CONTROL:
+ #~ elif suboption[2:3] == SET_CONTROL_USE_DSR_FLOW_CONTROL:
+ elif suboption[1:2] == NOTIFY_LINESTATE:
+ # client polls for current state
+ self.rfc2217SendSubnegotiation(
+ SERVER_NOTIFY_LINESTATE,
+ to_bytes([0]) # sorry, nothing like that implemented
+ )
+ elif suboption[1:2] == NOTIFY_MODEMSTATE:
+ if self.logger:
+ self.logger.info("request for modem state")
+ # client polls for current state
+ self.check_modem_lines(force_notification=True)
+ elif suboption[1:2] == FLOWCONTROL_SUSPEND:
+ if self.logger:
+ self.logger.info("suspend")
+ self._remote_suspend_flow = True
+ elif suboption[1:2] == FLOWCONTROL_RESUME:
+ if self.logger:
+ self.logger.info("resume")
+ self._remote_suspend_flow = False
+ elif suboption[1:2] == SET_LINESTATE_MASK:
+ self.linstate_mask = ord(suboption[2:3]) # ensure it is a number
+ if self.logger:
+ self.logger.info("line state mask: 0x%02x" % (self.linstate_mask,))
+ elif suboption[1:2] == SET_MODEMSTATE_MASK:
+ self.modemstate_mask = ord(suboption[2:3]) # ensure it is a number
+ if self.logger:
+ self.logger.info("modem state mask: 0x%02x" % (self.modemstate_mask,))
+ elif suboption[1:2] == PURGE_DATA:
+ if suboption[2:3] == PURGE_RECEIVE_BUFFER:
+ self.serial.flushInput()
+ if self.logger:
+ self.logger.info("purge in")
+ self.rfc2217SendSubnegotiation(SERVER_PURGE_DATA, PURGE_RECEIVE_BUFFER)
+ elif suboption[2:3] == PURGE_TRANSMIT_BUFFER:
+ self.serial.flushOutput()
+ if self.logger:
+ self.logger.info("purge out")
+ self.rfc2217SendSubnegotiation(SERVER_PURGE_DATA, PURGE_TRANSMIT_BUFFER)
+ elif suboption[2:3] == PURGE_BOTH_BUFFERS:
+ self.serial.flushInput()
+ self.serial.flushOutput()
+ if self.logger:
+ self.logger.info("purge both")
+ self.rfc2217SendSubnegotiation(SERVER_PURGE_DATA, PURGE_BOTH_BUFFERS)
+ else:
+ if self.logger:
+ self.logger.error("undefined PURGE_DATA: %r" % list(suboption[2:]))
+ else:
+ if self.logger:
+ self.logger.error("undefined COM_PORT_OPTION: %r" % list(suboption[1:]))
+ else:
+ if self.logger:
+ self.logger.warning("unknown subnegotiation: %r" % (suboption,))
+
+
+# simple client test
+if __name__ == '__main__':
+ import sys
+ s = Serial('rfc2217://localhost:7000', 115200)
+ sys.stdout.write('%s\n' % s)
+
+ #~ s.baudrate = 1898
+
+ sys.stdout.write("write...\n")
+ s.write("hello\n")
+ s.flush()
+ sys.stdout.write("read: %s\n" % s.read(5))
+
+ #~ s.baudrate = 19200
+ #~ s.databits = 7
+ s.close()
diff --git a/scripts/serial/serialcli.py b/scripts/serial/serialcli.py
new file mode 100644
index 0000000..9ab3876
--- /dev/null
+++ b/scripts/serial/serialcli.py
@@ -0,0 +1,284 @@
+#! python
+# Python Serial Port Extension for Win32, Linux, BSD, Jython and .NET/Mono
+# serial driver for .NET/Mono (IronPython), .NET >= 2
+# see __init__.py
+#
+# (C) 2008 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+
+import clr
+import System
+import System.IO.Ports
+from serial.serialutil import *
+
+
+def device(portnum):
+ """Turn a port number into a device name"""
+ return System.IO.Ports.SerialPort.GetPortNames()[portnum]
+
+
+# must invoke function with byte array, make a helper to convert strings
+# to byte arrays
+sab = System.Array[System.Byte]
+def as_byte_array(string):
+ return sab([ord(x) for x in string]) # XXX will require adaption when run with a 3.x compatible IronPython
+
+class IronSerial(SerialBase):
+ """Serial port implementation for .NET/Mono."""
+
+ BAUDRATES = (50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
+ 9600, 19200, 38400, 57600, 115200)
+
+ def open(self):
+ """\
+ Open port with current settings. This may throw a SerialException
+ if the port cannot be opened.
+ """
+ if self._port is None:
+ raise SerialException("Port must be configured before it can be used.")
+ if self._isOpen:
+ raise SerialException("Port is already open.")
+ try:
+ self._port_handle = System.IO.Ports.SerialPort(self.portstr)
+ except Exception, msg:
+ self._port_handle = None
+ raise SerialException("could not open port %s: %s" % (self.portstr, msg))
+
+ self._reconfigurePort()
+ self._port_handle.Open()
+ self._isOpen = True
+ if not self._rtscts:
+ self.setRTS(True)
+ self.setDTR(True)
+ self.flushInput()
+ self.flushOutput()
+
+ def _reconfigurePort(self):
+ """Set communication parameters on opened port."""
+ if not self._port_handle:
+ raise SerialException("Can only operate on a valid port handle")
+
+ #~ self._port_handle.ReceivedBytesThreshold = 1
+
+ if self._timeout is None:
+ self._port_handle.ReadTimeout = System.IO.Ports.SerialPort.InfiniteTimeout
+ else:
+ self._port_handle.ReadTimeout = int(self._timeout*1000)
+
+ # if self._timeout != 0 and self._interCharTimeout is not None:
+ # timeouts = (int(self._interCharTimeout * 1000),) + timeouts[1:]
+
+ if self._writeTimeout is None:
+ self._port_handle.WriteTimeout = System.IO.Ports.SerialPort.InfiniteTimeout
+ else:
+ self._port_handle.WriteTimeout = int(self._writeTimeout*1000)
+
+
+ # Setup the connection info.
+ try:
+ self._port_handle.BaudRate = self._baudrate
+ except IOError, e:
+ # catch errors from illegal baudrate settings
+ raise ValueError(str(e))
+
+ if self._bytesize == FIVEBITS:
+ self._port_handle.DataBits = 5
+ elif self._bytesize == SIXBITS:
+ self._port_handle.DataBits = 6
+ elif self._bytesize == SEVENBITS:
+ self._port_handle.DataBits = 7
+ elif self._bytesize == EIGHTBITS:
+ self._port_handle.DataBits = 8
+ else:
+ raise ValueError("Unsupported number of data bits: %r" % self._bytesize)
+
+ if self._parity == PARITY_NONE:
+ self._port_handle.Parity = getattr(System.IO.Ports.Parity, 'None') # reserved keyword in Py3k
+ elif self._parity == PARITY_EVEN:
+ self._port_handle.Parity = System.IO.Ports.Parity.Even
+ elif self._parity == PARITY_ODD:
+ self._port_handle.Parity = System.IO.Ports.Parity.Odd
+ elif self._parity == PARITY_MARK:
+ self._port_handle.Parity = System.IO.Ports.Parity.Mark
+ elif self._parity == PARITY_SPACE:
+ self._port_handle.Parity = System.IO.Ports.Parity.Space
+ else:
+ raise ValueError("Unsupported parity mode: %r" % self._parity)
+
+ if self._stopbits == STOPBITS_ONE:
+ self._port_handle.StopBits = System.IO.Ports.StopBits.One
+ elif self._stopbits == STOPBITS_ONE_POINT_FIVE:
+ self._port_handle.StopBits = System.IO.Ports.StopBits.OnePointFive
+ elif self._stopbits == STOPBITS_TWO:
+ self._port_handle.StopBits = System.IO.Ports.StopBits.Two
+ else:
+ raise ValueError("Unsupported number of stop bits: %r" % self._stopbits)
+
+ if self._rtscts and self._xonxoff:
+ self._port_handle.Handshake = System.IO.Ports.Handshake.RequestToSendXOnXOff
+ elif self._rtscts:
+ self._port_handle.Handshake = System.IO.Ports.Handshake.RequestToSend
+ elif self._xonxoff:
+ self._port_handle.Handshake = System.IO.Ports.Handshake.XOnXOff
+ else:
+ self._port_handle.Handshake = getattr(System.IO.Ports.Handshake, 'None') # reserved keyword in Py3k
+
+ #~ def __del__(self):
+ #~ self.close()
+
+ def close(self):
+ """Close port"""
+ if self._isOpen:
+ if self._port_handle:
+ try:
+ self._port_handle.Close()
+ except System.IO.Ports.InvalidOperationException:
+ # ignore errors. can happen for unplugged USB serial devices
+ pass
+ self._port_handle = None
+ self._isOpen = False
+
+ def makeDeviceName(self, port):
+ try:
+ return device(port)
+ except TypeError, e:
+ raise SerialException(str(e))
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ def inWaiting(self):
+ """Return the number of characters currently in the input buffer."""
+ if not self._port_handle: raise portNotOpenError
+ return self._port_handle.BytesToRead
+
+ def read(self, size=1):
+ """\
+ Read size bytes from the serial port. If a timeout is set it may
+ return less characters as requested. With no timeout it will block
+ until the requested number of bytes is read.
+ """
+ if not self._port_handle: raise portNotOpenError
+ # must use single byte reads as this is the only way to read
+ # without applying encodings
+ data = bytearray()
+ while size:
+ try:
+ data.append(self._port_handle.ReadByte())
+ except System.TimeoutException, e:
+ break
+ else:
+ size -= 1
+ return bytes(data)
+
+ def write(self, data):
+ """Output the given string over the serial port."""
+ if not self._port_handle: raise portNotOpenError
+ #~ if not isinstance(data, (bytes, bytearray)):
+ #~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
+ try:
+ # must call overloaded method with byte array argument
+ # as this is the only one not applying encodings
+ self._port_handle.Write(as_byte_array(data), 0, len(data))
+ except System.TimeoutException, e:
+ raise writeTimeoutError
+ return len(data)
+
+ def flushInput(self):
+ """Clear input buffer, discarding all that is in the buffer."""
+ if not self._port_handle: raise portNotOpenError
+ self._port_handle.DiscardInBuffer()
+
+ def flushOutput(self):
+ """\
+ Clear output buffer, aborting the current output and
+ discarding all that is in the buffer.
+ """
+ if not self._port_handle: raise portNotOpenError
+ self._port_handle.DiscardOutBuffer()
+
+ def sendBreak(self, duration=0.25):
+ """\
+ Send break condition. Timed, returns to idle state after given
+ duration.
+ """
+ if not self._port_handle: raise portNotOpenError
+ import time
+ self._port_handle.BreakState = True
+ time.sleep(duration)
+ self._port_handle.BreakState = False
+
+ def setBreak(self, level=True):
+ """
+ Set break: Controls TXD. When active, to transmitting is possible.
+ """
+ if not self._port_handle: raise portNotOpenError
+ self._port_handle.BreakState = bool(level)
+
+ def setRTS(self, level=True):
+ """Set terminal status line: Request To Send"""
+ if not self._port_handle: raise portNotOpenError
+ self._port_handle.RtsEnable = bool(level)
+
+ def setDTR(self, level=True):
+ """Set terminal status line: Data Terminal Ready"""
+ if not self._port_handle: raise portNotOpenError
+ self._port_handle.DtrEnable = bool(level)
+
+ def getCTS(self):
+ """Read terminal status line: Clear To Send"""
+ if not self._port_handle: raise portNotOpenError
+ return self._port_handle.CtsHolding
+
+ def getDSR(self):
+ """Read terminal status line: Data Set Ready"""
+ if not self._port_handle: raise portNotOpenError
+ return self._port_handle.DsrHolding
+
+ def getRI(self):
+ """Read terminal status line: Ring Indicator"""
+ if not self._port_handle: raise portNotOpenError
+ #~ return self._port_handle.XXX
+ return False #XXX an error would be better
+
+ def getCD(self):
+ """Read terminal status line: Carrier Detect"""
+ if not self._port_handle: raise portNotOpenError
+ return self._port_handle.CDHolding
+
+ # - - platform specific - - - -
+ # none
+
+
+# assemble Serial class with the platform specific implementation and the base
+# for file-like behavior. for Python 2.6 and newer, that provide the new I/O
+# library, derive from io.RawIOBase
+try:
+ import io
+except ImportError:
+ # classic version with our own file-like emulation
+ class Serial(IronSerial, FileLike):
+ pass
+else:
+ # io library present
+ class Serial(IronSerial, io.RawIOBase):
+ pass
+
+
+# Nur Testfunktion!!
+if __name__ == '__main__':
+ import sys
+
+ s = Serial(0)
+ sys.stdio.write('%s\n' % s)
+
+ s = Serial()
+ sys.stdio.write('%s\n' % s)
+
+
+ s.baudrate = 19200
+ s.databits = 7
+ s.close()
+ s.port = 0
+ s.open()
+ sys.stdio.write('%s\n' % s)
+
diff --git a/scripts/serial/serialposix.py b/scripts/serial/serialposix.py
new file mode 100644
index 0000000..359ad1b
--- /dev/null
+++ b/scripts/serial/serialposix.py
@@ -0,0 +1,730 @@
+#!/usr/bin/env python
+#
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# module for serial IO for POSIX compatible systems, like Linux
+# see __init__.py
+#
+# (C) 2001-2010 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+#
+# parts based on code from Grant B. Edwards <grante at visi.com>:
+# ftp://ftp.visi.com/users/grante/python/PosixSerial.py
+#
+# references: http://www.easysw.com/~mike/serial/serial.html
+
+import sys, os, fcntl, termios, struct, select, errno, time
+from serial.serialutil import *
+
+# Do check the Python version as some constants have moved.
+if (sys.hexversion < 0x020100f0):
+ import TERMIOS
+else:
+ TERMIOS = termios
+
+if (sys.hexversion < 0x020200f0):
+ import FCNTL
+else:
+ FCNTL = fcntl
+
+# try to detect the OS so that a device can be selected...
+# this code block should supply a device() and set_special_baudrate() function
+# for the platform
+plat = sys.platform.lower()
+
+if plat[:5] == 'linux': # Linux (confirmed)
+
+ def device(port):
+ return '/dev/ttyS%d' % port
+
+ TCGETS2 = 0x802C542A
+ TCSETS2 = 0x402C542B
+ BOTHER = 0o010000
+
+ def set_special_baudrate(port, baudrate):
+ # right size is 44 on x86_64, allow for some growth
+ import array
+ buf = array.array('i', [0] * 64)
+
+ try:
+ # get serial_struct
+ FCNTL.ioctl(port.fd, TCGETS2, buf)
+ # set custom speed
+ buf[2] &= ~TERMIOS.CBAUD
+ buf[2] |= BOTHER
+ buf[9] = buf[10] = baudrate
+
+ # set serial_struct
+ res = FCNTL.ioctl(port.fd, TCSETS2, buf)
+ except IOError, e:
+ raise ValueError('Failed to set custom baud rate (%s): %s' % (baudrate, e))
+
+ baudrate_constants = {
+ 0: 0000000, # hang up
+ 50: 0000001,
+ 75: 0000002,
+ 110: 0000003,
+ 134: 0000004,
+ 150: 0000005,
+ 200: 0000006,
+ 300: 0000007,
+ 600: 0000010,
+ 1200: 0000011,
+ 1800: 0000012,
+ 2400: 0000013,
+ 4800: 0000014,
+ 9600: 0000015,
+ 19200: 0000016,
+ 38400: 0000017,
+ 57600: 0010001,
+ 115200: 0010002,
+ 230400: 0010003,
+ 460800: 0010004,
+ 500000: 0010005,
+ 576000: 0010006,
+ 921600: 0010007,
+ 1000000: 0010010,
+ 1152000: 0010011,
+ 1500000: 0010012,
+ 2000000: 0010013,
+ 2500000: 0010014,
+ 3000000: 0010015,
+ 3500000: 0010016,
+ 4000000: 0010017
+ }
+
+elif plat == 'cygwin': # cygwin/win32 (confirmed)
+
+ def device(port):
+ return '/dev/com%d' % (port + 1)
+
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("sorry don't know how to handle non standard baud rate on this platform")
+
+ baudrate_constants = {
+ 128000: 0x01003,
+ 256000: 0x01005,
+ 500000: 0x01007,
+ 576000: 0x01008,
+ 921600: 0x01009,
+ 1000000: 0x0100a,
+ 1152000: 0x0100b,
+ 1500000: 0x0100c,
+ 2000000: 0x0100d,
+ 2500000: 0x0100e,
+ 3000000: 0x0100f
+ }
+
+elif plat[:7] == 'openbsd': # OpenBSD
+
+ def device(port):
+ return '/dev/cua%02d' % port
+
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("sorry don't know how to handle non standard baud rate on this platform")
+
+ baudrate_constants = {}
+
+elif plat[:3] == 'bsd' or \
+ plat[:7] == 'freebsd':
+
+ def device(port):
+ return '/dev/cuad%d' % port
+
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("sorry don't know how to handle non standard baud rate on this platform")
+
+ baudrate_constants = {}
+
+elif plat[:6] == 'darwin': # OS X
+
+ version = os.uname()[2].split('.')
+ # Tiger or above can support arbitrary serial speeds
+ if int(version[0]) >= 8:
+ def set_special_baudrate(port, baudrate):
+ # use IOKit-specific call to set up high speeds
+ import array, fcntl
+ buf = array.array('i', [baudrate])
+ IOSSIOSPEED = 0x80045402 #_IOW('T', 2, speed_t)
+ fcntl.ioctl(port.fd, IOSSIOSPEED, buf, 1)
+ else: # version < 8
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("baud rate not supported")
+
+ def device(port):
+ return '/dev/cuad%d' % port
+
+ baudrate_constants = {}
+
+
+elif plat[:6] == 'netbsd': # NetBSD 1.6 testing by Erk
+
+ def device(port):
+ return '/dev/dty%02d' % port
+
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("sorry don't know how to handle non standard baud rate on this platform")
+
+ baudrate_constants = {}
+
+elif plat[:4] == 'irix': # IRIX (partially tested)
+
+ def device(port):
+ return '/dev/ttyf%d' % (port+1) #XXX different device names depending on flow control
+
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("sorry don't know how to handle non standard baud rate on this platform")
+
+ baudrate_constants = {}
+
+elif plat[:2] == 'hp': # HP-UX (not tested)
+
+ def device(port):
+ return '/dev/tty%dp0' % (port+1)
+
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("sorry don't know how to handle non standard baud rate on this platform")
+
+ baudrate_constants = {}
+
+elif plat[:5] == 'sunos': # Solaris/SunOS (confirmed)
+
+ def device(port):
+ return '/dev/tty%c' % (ord('a')+port)
+
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("sorry don't know how to handle non standard baud rate on this platform")
+
+ baudrate_constants = {}
+
+elif plat[:3] == 'aix': # AIX
+
+ def device(port):
+ return '/dev/tty%d' % (port)
+
+ def set_special_baudrate(port, baudrate):
+ raise ValueError("sorry don't know how to handle non standard baud rate on this platform")
+
+ baudrate_constants = {}
+
+else:
+ # platform detection has failed...
+ sys.stderr.write("""\
+don't know how to number ttys on this system.
+! Use an explicit path (eg /dev/ttyS1) or send this information to
+! the author of this module:
+
+sys.platform = %r
+os.name = %r
+serialposix.py version = %s
+
+also add the device name of the serial port and where the
+counting starts for the first serial port.
+e.g. 'first serial port: /dev/ttyS0'
+and with a bit luck you can get this module running...
+""" % (sys.platform, os.name, VERSION))
+ # no exception, just continue with a brave attempt to build a device name
+ # even if the device name is not correct for the platform it has chances
+ # to work using a string with the real device name as port parameter.
+ def device(portum):
+ return '/dev/ttyS%d' % portnum
+ def set_special_baudrate(port, baudrate):
+ raise SerialException("sorry don't know how to handle non standard baud rate on this platform")
+ baudrate_constants = {}
+ #~ raise Exception, "this module does not run on this platform, sorry."
+
+# whats up with "aix", "beos", ....
+# they should work, just need to know the device names.
+
+
+# load some constants for later use.
+# try to use values from TERMIOS, use defaults from linux otherwise
+TIOCMGET = hasattr(TERMIOS, 'TIOCMGET') and TERMIOS.TIOCMGET or 0x5415
+TIOCMBIS = hasattr(TERMIOS, 'TIOCMBIS') and TERMIOS.TIOCMBIS or 0x5416
+TIOCMBIC = hasattr(TERMIOS, 'TIOCMBIC') and TERMIOS.TIOCMBIC or 0x5417
+TIOCMSET = hasattr(TERMIOS, 'TIOCMSET') and TERMIOS.TIOCMSET or 0x5418
+
+#TIOCM_LE = hasattr(TERMIOS, 'TIOCM_LE') and TERMIOS.TIOCM_LE or 0x001
+TIOCM_DTR = hasattr(TERMIOS, 'TIOCM_DTR') and TERMIOS.TIOCM_DTR or 0x002
+TIOCM_RTS = hasattr(TERMIOS, 'TIOCM_RTS') and TERMIOS.TIOCM_RTS or 0x004
+#TIOCM_ST = hasattr(TERMIOS, 'TIOCM_ST') and TERMIOS.TIOCM_ST or 0x008
+#TIOCM_SR = hasattr(TERMIOS, 'TIOCM_SR') and TERMIOS.TIOCM_SR or 0x010
+
+TIOCM_CTS = hasattr(TERMIOS, 'TIOCM_CTS') and TERMIOS.TIOCM_CTS or 0x020
+TIOCM_CAR = hasattr(TERMIOS, 'TIOCM_CAR') and TERMIOS.TIOCM_CAR or 0x040
+TIOCM_RNG = hasattr(TERMIOS, 'TIOCM_RNG') and TERMIOS.TIOCM_RNG or 0x080
+TIOCM_DSR = hasattr(TERMIOS, 'TIOCM_DSR') and TERMIOS.TIOCM_DSR or 0x100
+TIOCM_CD = hasattr(TERMIOS, 'TIOCM_CD') and TERMIOS.TIOCM_CD or TIOCM_CAR
+TIOCM_RI = hasattr(TERMIOS, 'TIOCM_RI') and TERMIOS.TIOCM_RI or TIOCM_RNG
+#TIOCM_OUT1 = hasattr(TERMIOS, 'TIOCM_OUT1') and TERMIOS.TIOCM_OUT1 or 0x2000
+#TIOCM_OUT2 = hasattr(TERMIOS, 'TIOCM_OUT2') and TERMIOS.TIOCM_OUT2 or 0x4000
+if hasattr(TERMIOS, 'TIOCINQ'):
+ TIOCINQ = TERMIOS.TIOCINQ
+else:
+ TIOCINQ = hasattr(TERMIOS, 'FIONREAD') and TERMIOS.FIONREAD or 0x541B
+TIOCOUTQ = hasattr(TERMIOS, 'TIOCOUTQ') and TERMIOS.TIOCOUTQ or 0x5411
+
+TIOCM_zero_str = struct.pack('I', 0)
+TIOCM_RTS_str = struct.pack('I', TIOCM_RTS)
+TIOCM_DTR_str = struct.pack('I', TIOCM_DTR)
+
+TIOCSBRK = hasattr(TERMIOS, 'TIOCSBRK') and TERMIOS.TIOCSBRK or 0x5427
+TIOCCBRK = hasattr(TERMIOS, 'TIOCCBRK') and TERMIOS.TIOCCBRK or 0x5428
+
+CMSPAR = 010000000000 # Use "stick" (mark/space) parity
+
+
+class PosixSerial(SerialBase):
+ """\
+ Serial port class POSIX implementation. Serial port configuration is
+ done with termios and fcntl. Runs on Linux and many other Un*x like
+ systems.
+ """
+
+ def open(self):
+ """\
+ Open port with current settings. This may throw a SerialException
+ if the port cannot be opened."""
+ if self._port is None:
+ raise SerialException("Port must be configured before it can be used.")
+ if self._isOpen:
+ raise SerialException("Port is already open.")
+ self.fd = None
+ # open
+ try:
+ self.fd = os.open(self.portstr, os.O_RDWR|os.O_NOCTTY|os.O_NONBLOCK)
+ except OSError, msg:
+ self.fd = None
+ raise SerialException(msg.errno, "could not open port %s: %s" % (self._port, msg))
+ #~ fcntl.fcntl(self.fd, FCNTL.F_SETFL, 0) # set blocking
+
+ try:
+ self._reconfigurePort()
+ except:
+ try:
+ os.close(self.fd)
+ except:
+ # ignore any exception when closing the port
+ # also to keep original exception that happened when setting up
+ pass
+ self.fd = None
+ raise
+ else:
+ self._isOpen = True
+ self.flushInput()
+
+
+ def _reconfigurePort(self):
+ """Set communication parameters on opened port."""
+ if self.fd is None:
+ raise SerialException("Can only operate on a valid file descriptor")
+ custom_baud = None
+
+ vmin = vtime = 0 # timeout is done via select
+ if self._interCharTimeout is not None:
+ vmin = 1
+ vtime = int(self._interCharTimeout * 10)
+ try:
+ orig_attr = termios.tcgetattr(self.fd)
+ iflag, oflag, cflag, lflag, ispeed, ospeed, cc = orig_attr
+ except termios.error, msg: # if a port is nonexistent but has a /dev file, it'll fail here
+ raise SerialException("Could not configure port: %s" % msg)
+ # set up raw mode / no echo / binary
+ cflag |= (TERMIOS.CLOCAL|TERMIOS.CREAD)
+ lflag &= ~(TERMIOS.ICANON|TERMIOS.ECHO|TERMIOS.ECHOE|TERMIOS.ECHOK|TERMIOS.ECHONL|
+ TERMIOS.ISIG|TERMIOS.IEXTEN) #|TERMIOS.ECHOPRT
+ for flag in ('ECHOCTL', 'ECHOKE'): # netbsd workaround for Erk
+ if hasattr(TERMIOS, flag):
+ lflag &= ~getattr(TERMIOS, flag)
+
+ oflag &= ~(TERMIOS.OPOST)
+ iflag &= ~(TERMIOS.INLCR|TERMIOS.IGNCR|TERMIOS.ICRNL|TERMIOS.IGNBRK)
+ if hasattr(TERMIOS, 'IUCLC'):
+ iflag &= ~TERMIOS.IUCLC
+ if hasattr(TERMIOS, 'PARMRK'):
+ iflag &= ~TERMIOS.PARMRK
+
+ # setup baud rate
+ try:
+ ispeed = ospeed = getattr(TERMIOS, 'B%s' % (self._baudrate))
+ except AttributeError:
+ try:
+ ispeed = ospeed = baudrate_constants[self._baudrate]
+ except KeyError:
+ #~ raise ValueError('Invalid baud rate: %r' % self._baudrate)
+ # may need custom baud rate, it isn't in our list.
+ ispeed = ospeed = getattr(TERMIOS, 'B38400')
+ try:
+ custom_baud = int(self._baudrate) # store for later
+ except ValueError:
+ raise ValueError('Invalid baud rate: %r' % self._baudrate)
+ else:
+ if custom_baud < 0:
+ raise ValueError('Invalid baud rate: %r' % self._baudrate)
+
+ # setup char len
+ cflag &= ~TERMIOS.CSIZE
+ if self._bytesize == 8:
+ cflag |= TERMIOS.CS8
+ elif self._bytesize == 7:
+ cflag |= TERMIOS.CS7
+ elif self._bytesize == 6:
+ cflag |= TERMIOS.CS6
+ elif self._bytesize == 5:
+ cflag |= TERMIOS.CS5
+ else:
+ raise ValueError('Invalid char len: %r' % self._bytesize)
+ # setup stop bits
+ if self._stopbits == STOPBITS_ONE:
+ cflag &= ~(TERMIOS.CSTOPB)
+ elif self._stopbits == STOPBITS_ONE_POINT_FIVE:
+ cflag |= (TERMIOS.CSTOPB) # XXX same as TWO.. there is no POSIX support for 1.5
+ elif self._stopbits == STOPBITS_TWO:
+ cflag |= (TERMIOS.CSTOPB)
+ else:
+ raise ValueError('Invalid stop bit specification: %r' % self._stopbits)
+ # setup parity
+ iflag &= ~(TERMIOS.INPCK|TERMIOS.ISTRIP)
+ if self._parity == PARITY_NONE:
+ cflag &= ~(TERMIOS.PARENB|TERMIOS.PARODD)
+ elif self._parity == PARITY_EVEN:
+ cflag &= ~(TERMIOS.PARODD)
+ cflag |= (TERMIOS.PARENB)
+ elif self._parity == PARITY_ODD:
+ cflag |= (TERMIOS.PARENB|TERMIOS.PARODD)
+ elif self._parity == PARITY_MARK and plat[:5] == 'linux':
+ cflag |= (TERMIOS.PARENB|CMSPAR|TERMIOS.PARODD)
+ elif self._parity == PARITY_SPACE and plat[:5] == 'linux':
+ cflag |= (TERMIOS.PARENB|CMSPAR)
+ cflag &= ~(TERMIOS.PARODD)
+ else:
+ raise ValueError('Invalid parity: %r' % self._parity)
+ # setup flow control
+ # xonxoff
+ if hasattr(TERMIOS, 'IXANY'):
+ if self._xonxoff:
+ iflag |= (TERMIOS.IXON|TERMIOS.IXOFF) #|TERMIOS.IXANY)
+ else:
+ iflag &= ~(TERMIOS.IXON|TERMIOS.IXOFF|TERMIOS.IXANY)
+ else:
+ if self._xonxoff:
+ iflag |= (TERMIOS.IXON|TERMIOS.IXOFF)
+ else:
+ iflag &= ~(TERMIOS.IXON|TERMIOS.IXOFF)
+ # rtscts
+ if hasattr(TERMIOS, 'CRTSCTS'):
+ if self._rtscts:
+ cflag |= (TERMIOS.CRTSCTS)
+ else:
+ cflag &= ~(TERMIOS.CRTSCTS)
+ elif hasattr(TERMIOS, 'CNEW_RTSCTS'): # try it with alternate constant name
+ if self._rtscts:
+ cflag |= (TERMIOS.CNEW_RTSCTS)
+ else:
+ cflag &= ~(TERMIOS.CNEW_RTSCTS)
+ # XXX should there be a warning if setting up rtscts (and xonxoff etc) fails??
+
+ # buffer
+ # vmin "minimal number of characters to be read. 0 for non blocking"
+ if vmin < 0 or vmin > 255:
+ raise ValueError('Invalid vmin: %r ' % vmin)
+ cc[TERMIOS.VMIN] = vmin
+ # vtime
+ if vtime < 0 or vtime > 255:
+ raise ValueError('Invalid vtime: %r' % vtime)
+ cc[TERMIOS.VTIME] = vtime
+ # activate settings
+ if [iflag, oflag, cflag, lflag, ispeed, ospeed, cc] != orig_attr:
+ termios.tcsetattr(self.fd, TERMIOS.TCSANOW, [iflag, oflag, cflag, lflag, ispeed, ospeed, cc])
+
+ # apply custom baud rate, if any
+ if custom_baud is not None:
+ set_special_baudrate(self, custom_baud)
+
+ def close(self):
+ """Close port"""
+ if self._isOpen:
+ if self.fd is not None:
+ os.close(self.fd)
+ self.fd = None
+ self._isOpen = False
+
+ def makeDeviceName(self, port):
+ return device(port)
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ def inWaiting(self):
+ """Return the number of characters currently in the input buffer."""
+ #~ s = fcntl.ioctl(self.fd, TERMIOS.FIONREAD, TIOCM_zero_str)
+ s = fcntl.ioctl(self.fd, TIOCINQ, TIOCM_zero_str)
+ return struct.unpack('I',s)[0]
+
+ # select based implementation, proved to work on many systems
+ def read(self, size=1):
+ """\
+ Read size bytes from the serial port. If a timeout is set it may
+ return less characters as requested. With no timeout it will block
+ until the requested number of bytes is read.
+ """
+ if not self._isOpen: raise portNotOpenError
+ read = bytearray()
+ while len(read) < size:
+ try:
+ ready,_,_ = select.select([self.fd],[],[], self._timeout)
+ # If select was used with a timeout, and the timeout occurs, it
+ # returns with empty lists -> thus abort read operation.
+ # For timeout == 0 (non-blocking operation) also abort when there
+ # is nothing to read.
+ if not ready:
+ break # timeout
+ buf = os.read(self.fd, size-len(read))
+ # read should always return some data as select reported it was
+ # ready to read when we get to this point.
+ if not buf:
+ # Disconnected devices, at least on Linux, show the
+ # behavior that they are always ready to read immediately
+ # but reading returns nothing.
+ raise SerialException('device reports readiness to read but returned no data (device disconnected or multiple access on port?)')
+ read.extend(buf)
+ except OSError, e:
+ # this is for Python 3.x where select.error is a subclass of OSError
+ # ignore EAGAIN errors. all other errors are shown
+ if e.errno != errno.EAGAIN:
+ raise SerialException('read failed: %s' % (e,))
+ except select.error, e:
+ # this is for Python 2.x
+ # ignore EAGAIN errors. all other errors are shown
+ # see also http://www.python.org/dev/peps/pep-3151/#select
+ if e[0] != errno.EAGAIN:
+ raise SerialException('read failed: %s' % (e,))
+ return bytes(read)
+
+ def write(self, data):
+ """Output the given string over the serial port."""
+ if not self._isOpen: raise portNotOpenError
+ d = to_bytes(data)
+ tx_len = len(d)
+ if self._writeTimeout is not None and self._writeTimeout > 0:
+ timeout = time.time() + self._writeTimeout
+ else:
+ timeout = None
+ while tx_len > 0:
+ try:
+ n = os.write(self.fd, d)
+ if timeout:
+ # when timeout is set, use select to wait for being ready
+ # with the time left as timeout
+ timeleft = timeout - time.time()
+ if timeleft < 0:
+ raise writeTimeoutError
+ _, ready, _ = select.select([], [self.fd], [], timeleft)
+ if not ready:
+ raise writeTimeoutError
+ else:
+ # wait for write operation
+ _, ready, _ = select.select([], [self.fd], [], None)
+ if not ready:
+ raise SerialException('write failed (select)')
+ d = d[n:]
+ tx_len -= n
+ except OSError, v:
+ if v.errno != errno.EAGAIN:
+ raise SerialException('write failed: %s' % (v,))
+ return len(data)
+
+ def flush(self):
+ """\
+ Flush of file like objects. In this case, wait until all data
+ is written.
+ """
+ self.drainOutput()
+
+ def flushInput(self):
+ """Clear input buffer, discarding all that is in the buffer."""
+ if not self._isOpen: raise portNotOpenError
+ termios.tcflush(self.fd, TERMIOS.TCIFLUSH)
+
+ def flushOutput(self):
+ """\
+ Clear output buffer, aborting the current output and discarding all
+ that is in the buffer.
+ """
+ if not self._isOpen: raise portNotOpenError
+ termios.tcflush(self.fd, TERMIOS.TCOFLUSH)
+
+ def sendBreak(self, duration=0.25):
+ """\
+ Send break condition. Timed, returns to idle state after given
+ duration.
+ """
+ if not self._isOpen: raise portNotOpenError
+ termios.tcsendbreak(self.fd, int(duration/0.25))
+
+ def setBreak(self, level=1):
+ """\
+ Set break: Controls TXD. When active, no transmitting is possible.
+ """
+ if self.fd is None: raise portNotOpenError
+ if level:
+ fcntl.ioctl(self.fd, TIOCSBRK)
+ else:
+ fcntl.ioctl(self.fd, TIOCCBRK)
+
+ def setRTS(self, level=1):
+ """Set terminal status line: Request To Send"""
+ if not self._isOpen: raise portNotOpenError
+ if level:
+ fcntl.ioctl(self.fd, TIOCMBIS, TIOCM_RTS_str)
+ else:
+ fcntl.ioctl(self.fd, TIOCMBIC, TIOCM_RTS_str)
+
+ def setDTR(self, level=1):
+ """Set terminal status line: Data Terminal Ready"""
+ if not self._isOpen: raise portNotOpenError
+ if level:
+ fcntl.ioctl(self.fd, TIOCMBIS, TIOCM_DTR_str)
+ else:
+ fcntl.ioctl(self.fd, TIOCMBIC, TIOCM_DTR_str)
+
+ def getCTS(self):
+ """Read terminal status line: Clear To Send"""
+ if not self._isOpen: raise portNotOpenError
+ s = fcntl.ioctl(self.fd, TIOCMGET, TIOCM_zero_str)
+ return struct.unpack('I',s)[0] & TIOCM_CTS != 0
+
+ def getDSR(self):
+ """Read terminal status line: Data Set Ready"""
+ if not self._isOpen: raise portNotOpenError
+ s = fcntl.ioctl(self.fd, TIOCMGET, TIOCM_zero_str)
+ return struct.unpack('I',s)[0] & TIOCM_DSR != 0
+
+ def getRI(self):
+ """Read terminal status line: Ring Indicator"""
+ if not self._isOpen: raise portNotOpenError
+ s = fcntl.ioctl(self.fd, TIOCMGET, TIOCM_zero_str)
+ return struct.unpack('I',s)[0] & TIOCM_RI != 0
+
+ def getCD(self):
+ """Read terminal status line: Carrier Detect"""
+ if not self._isOpen: raise portNotOpenError
+ s = fcntl.ioctl(self.fd, TIOCMGET, TIOCM_zero_str)
+ return struct.unpack('I',s)[0] & TIOCM_CD != 0
+
+ # - - platform specific - - - -
+
+ def outWaiting(self):
+ """Return the number of characters currently in the output buffer."""
+ #~ s = fcntl.ioctl(self.fd, TERMIOS.FIONREAD, TIOCM_zero_str)
+ s = fcntl.ioctl(self.fd, TIOCOUTQ, TIOCM_zero_str)
+ return struct.unpack('I',s)[0]
+
+ def drainOutput(self):
+ """internal - not portable!"""
+ if not self._isOpen: raise portNotOpenError
+ termios.tcdrain(self.fd)
+
+ def nonblocking(self):
+ """internal - not portable!"""
+ if not self._isOpen: raise portNotOpenError
+ fcntl.fcntl(self.fd, FCNTL.F_SETFL, os.O_NONBLOCK)
+
+ def fileno(self):
+ """\
+ For easier use of the serial port instance with select.
+ WARNING: this function is not portable to different platforms!
+ """
+ if not self._isOpen: raise portNotOpenError
+ return self.fd
+
+ def setXON(self, level=True):
+ """\
+ Manually control flow - when software flow control is enabled.
+ This will send XON (true) and XOFF (false) to the other device.
+ WARNING: this function is not portable to different platforms!
+ """
+ if not self.hComPort: raise portNotOpenError
+ if enable:
+ termios.tcflow(self.fd, TERMIOS.TCION)
+ else:
+ termios.tcflow(self.fd, TERMIOS.TCIOFF)
+
+ def flowControlOut(self, enable):
+ """\
+ Manually control flow of outgoing data - when hardware or software flow
+ control is enabled.
+ WARNING: this function is not portable to different platforms!
+ """
+ if not self._isOpen: raise portNotOpenError
+ if enable:
+ termios.tcflow(self.fd, TERMIOS.TCOON)
+ else:
+ termios.tcflow(self.fd, TERMIOS.TCOOFF)
+
+
+# assemble Serial class with the platform specific implementation and the base
+# for file-like behavior. for Python 2.6 and newer, that provide the new I/O
+# library, derive from io.RawIOBase
+try:
+ import io
+except ImportError:
+ # classic version with our own file-like emulation
+ class Serial(PosixSerial, FileLike):
+ pass
+else:
+ # io library present
+ class Serial(PosixSerial, io.RawIOBase):
+ pass
+
+class PosixPollSerial(Serial):
+ """\
+ Poll based read implementation. Not all systems support poll properly.
+ However this one has better handling of errors, such as a device
+ disconnecting while it's in use (e.g. USB-serial unplugged).
+ """
+
+ def read(self, size=1):
+ """\
+ Read size bytes from the serial port. If a timeout is set it may
+ return less characters as requested. With no timeout it will block
+ until the requested number of bytes is read.
+ """
+ if self.fd is None: raise portNotOpenError
+ read = bytearray()
+ poll = select.poll()
+ poll.register(self.fd, select.POLLIN|select.POLLERR|select.POLLHUP|select.POLLNVAL)
+ if size > 0:
+ while len(read) < size:
+ # print "\tread(): size",size, "have", len(read) #debug
+ # wait until device becomes ready to read (or something fails)
+ for fd, event in poll.poll(self._timeout*1000):
+ if event & (select.POLLERR|select.POLLHUP|select.POLLNVAL):
+ raise SerialException('device reports error (poll)')
+ # we don't care if it is select.POLLIN or timeout, that's
+ # handled below
+ buf = os.read(self.fd, size - len(read))
+ read.extend(buf)
+ if ((self._timeout is not None and self._timeout >= 0) or
+ (self._interCharTimeout is not None and self._interCharTimeout > 0)) and not buf:
+ break # early abort on timeout
+ return bytes(read)
+
+
+if __name__ == '__main__':
+ s = Serial(0,
+ baudrate=19200, # baud rate
+ bytesize=EIGHTBITS, # number of data bits
+ parity=PARITY_EVEN, # enable parity checking
+ stopbits=STOPBITS_ONE, # number of stop bits
+ timeout=3, # set a timeout value, None for waiting forever
+ xonxoff=0, # enable software flow control
+ rtscts=0, # enable RTS/CTS flow control
+ )
+ s.setRTS(1)
+ s.setDTR(1)
+ s.flushInput()
+ s.flushOutput()
+ s.write('hello')
+ sys.stdout.write('%r\n' % s.read(5))
+ sys.stdout.write('%s\n' % s.inWaiting())
+ del s
+
diff --git a/scripts/serial/serialutil.py b/scripts/serial/serialutil.py
new file mode 100644
index 0000000..af0d2f6
--- /dev/null
+++ b/scripts/serial/serialutil.py
@@ -0,0 +1,572 @@
+#! python
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# see __init__.py
+#
+# (C) 2001-2010 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+
+# compatibility for older Python < 2.6
+try:
+ bytes
+ bytearray
+except (NameError, AttributeError):
+ # Python older than 2.6 do not have these types. Like for Python 2.6 they
+ # should behave like str. For Python older than 3.0 we want to work with
+ # strings anyway, only later versions have a true bytes type.
+ bytes = str
+ # bytearray is a mutable type that is easily turned into an instance of
+ # bytes
+ class bytearray(list):
+ # for bytes(bytearray()) usage
+ def __str__(self): return ''.join(self)
+ def __repr__(self): return 'bytearray(%r)' % ''.join(self)
+ # append automatically converts integers to characters
+ def append(self, item):
+ if isinstance(item, str):
+ list.append(self, item)
+ else:
+ list.append(self, chr(item))
+ # +=
+ def __iadd__(self, other):
+ for byte in other:
+ self.append(byte)
+ return self
+
+ def __getslice__(self, i, j):
+ return bytearray(list.__getslice__(self, i, j))
+
+ def __getitem__(self, item):
+ if isinstance(item, slice):
+ return bytearray(list.__getitem__(self, item))
+ else:
+ return ord(list.__getitem__(self, item))
+
+ def __eq__(self, other):
+ if isinstance(other, basestring):
+ other = bytearray(other)
+ return list.__eq__(self, other)
+
+# ``memoryview`` was introduced in Python 2.7 and ``bytes(some_memoryview)``
+# isn't returning the contents (very unfortunate). Therefore we need special
+# cases and test for it. Ensure that there is a ``memoryview`` object for older
+# Python versions. This is easier than making every test dependent on its
+# existence.
+try:
+ memoryview
+except (NameError, AttributeError):
+ # implementation does not matter as we do not realy use it.
+ # it just must not inherit from something else we might care for.
+ class memoryview:
+ pass
+
+
+# all Python versions prior 3.x convert ``str([17])`` to '[17]' instead of '\x11'
+# so a simple ``bytes(sequence)`` doesn't work for all versions
+def to_bytes(seq):
+ """convert a sequence to a bytes type"""
+ if isinstance(seq, bytes):
+ return seq
+ elif isinstance(seq, bytearray):
+ return bytes(seq)
+ elif isinstance(seq, memoryview):
+ return seq.tobytes()
+ else:
+ b = bytearray()
+ for item in seq:
+ b.append(item) # this one handles int and str for our emulation and ints for Python 3.x
+ return bytes(b)
+
+# create control bytes
+XON = to_bytes([17])
+XOFF = to_bytes([19])
+
+CR = to_bytes([13])
+LF = to_bytes([10])
+
+
+PARITY_NONE, PARITY_EVEN, PARITY_ODD, PARITY_MARK, PARITY_SPACE = 'N', 'E', 'O', 'M', 'S'
+STOPBITS_ONE, STOPBITS_ONE_POINT_FIVE, STOPBITS_TWO = (1, 1.5, 2)
+FIVEBITS, SIXBITS, SEVENBITS, EIGHTBITS = (5, 6, 7, 8)
+
+PARITY_NAMES = {
+ PARITY_NONE: 'None',
+ PARITY_EVEN: 'Even',
+ PARITY_ODD: 'Odd',
+ PARITY_MARK: 'Mark',
+ PARITY_SPACE: 'Space',
+}
+
+
+class SerialException(IOError):
+ """Base class for serial port related exceptions."""
+
+
+class SerialTimeoutException(SerialException):
+ """Write timeouts give an exception"""
+
+
+writeTimeoutError = SerialTimeoutException('Write timeout')
+portNotOpenError = SerialException('Attempting to use a port that is not open')
+
+
+class FileLike(object):
+ """\
+ An abstract file like class.
+
+ This class implements readline and readlines based on read and
+ writelines based on write.
+ This class is used to provide the above functions for to Serial
+ port objects.
+
+ Note that when the serial port was opened with _NO_ timeout that
+ readline blocks until it sees a newline (or the specified size is
+ reached) and that readlines would never return and therefore
+ refuses to work (it raises an exception in this case)!
+ """
+
+ def __init__(self):
+ self.closed = True
+
+ def close(self):
+ self.closed = True
+
+ # so that ports are closed when objects are discarded
+ def __del__(self):
+ """Destructor. Calls close()."""
+ # The try/except block is in case this is called at program
+ # exit time, when it's possible that globals have already been
+ # deleted, and then the close() call might fail. Since
+ # there's nothing we can do about such failures and they annoy
+ # the end users, we suppress the traceback.
+ try:
+ self.close()
+ except:
+ pass
+
+ def writelines(self, sequence):
+ for line in sequence:
+ self.write(line)
+
+ def flush(self):
+ """flush of file like objects"""
+ pass
+
+ # iterator for e.g. "for line in Serial(0): ..." usage
+ def next(self):
+ line = self.readline()
+ if not line: raise StopIteration
+ return line
+
+ def __iter__(self):
+ return self
+
+ def readline(self, size=None, eol=LF):
+ """\
+ Read a line which is terminated with end-of-line (eol) character
+ ('\n' by default) or until timeout.
+ """
+ leneol = len(eol)
+ line = bytearray()
+ while True:
+ c = self.read(1)
+ if c:
+ line += c
+ if line[-leneol:] == eol:
+ break
+ if size is not None and len(line) >= size:
+ break
+ else:
+ break
+ return bytes(line)
+
+ def readlines(self, sizehint=None, eol=LF):
+ """\
+ Read a list of lines, until timeout.
+ sizehint is ignored.
+ """
+ if self.timeout is None:
+ raise ValueError("Serial port MUST have enabled timeout for this function!")
+ leneol = len(eol)
+ lines = []
+ while True:
+ line = self.readline(eol=eol)
+ if line:
+ lines.append(line)
+ if line[-leneol:] != eol: # was the line received with a timeout?
+ break
+ else:
+ break
+ return lines
+
+ def xreadlines(self, sizehint=None):
+ """\
+ Read lines, implemented as generator. It will raise StopIteration on
+ timeout (empty read). sizehint is ignored.
+ """
+ while True:
+ line = self.readline()
+ if not line: break
+ yield line
+
+ # other functions of file-likes - not used by pySerial
+
+ #~ readinto(b)
+
+ def seek(self, pos, whence=0):
+ raise IOError("file is not seekable")
+
+ def tell(self):
+ raise IOError("file is not seekable")
+
+ def truncate(self, n=None):
+ raise IOError("file is not seekable")
+
+ def isatty(self):
+ return False
+
+
+class SerialBase(object):
+ """\
+ Serial port base class. Provides __init__ function and properties to
+ get/set port settings.
+ """
+
+ # default values, may be overridden in subclasses that do not support all values
+ BAUDRATES = (50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
+ 9600, 19200, 38400, 57600, 115200, 230400, 460800, 500000,
+ 576000, 921600, 1000000, 1152000, 1500000, 2000000, 2500000,
+ 3000000, 3500000, 4000000)
+ BYTESIZES = (FIVEBITS, SIXBITS, SEVENBITS, EIGHTBITS)
+ PARITIES = (PARITY_NONE, PARITY_EVEN, PARITY_ODD, PARITY_MARK, PARITY_SPACE)
+ STOPBITS = (STOPBITS_ONE, STOPBITS_ONE_POINT_FIVE, STOPBITS_TWO)
+
+ def __init__(self,
+ port = None, # number of device, numbering starts at
+ # zero. if everything fails, the user
+ # can specify a device string, note
+ # that this isn't portable anymore
+ # port will be opened if one is specified
+ baudrate=9600, # baud rate
+ bytesize=EIGHTBITS, # number of data bits
+ parity=PARITY_NONE, # enable parity checking
+ stopbits=STOPBITS_ONE, # number of stop bits
+ timeout=None, # set a timeout value, None to wait forever
+ xonxoff=False, # enable software flow control
+ rtscts=False, # enable RTS/CTS flow control
+ writeTimeout=None, # set a timeout for writes
+ dsrdtr=False, # None: use rtscts setting, dsrdtr override if True or False
+ interCharTimeout=None # Inter-character timeout, None to disable
+ ):
+ """\
+ Initialize comm port object. If a port is given, then the port will be
+ opened immediately. Otherwise a Serial port object in closed state
+ is returned.
+ """
+
+ self._isOpen = False
+ self._port = None # correct value is assigned below through properties
+ self._baudrate = None # correct value is assigned below through properties
+ self._bytesize = None # correct value is assigned below through properties
+ self._parity = None # correct value is assigned below through properties
+ self._stopbits = None # correct value is assigned below through properties
+ self._timeout = None # correct value is assigned below through properties
+ self._writeTimeout = None # correct value is assigned below through properties
+ self._xonxoff = None # correct value is assigned below through properties
+ self._rtscts = None # correct value is assigned below through properties
+ self._dsrdtr = None # correct value is assigned below through properties
+ self._interCharTimeout = None # correct value is assigned below through properties
+
+ # assign values using get/set methods using the properties feature
+ self.port = port
+ self.baudrate = baudrate
+ self.bytesize = bytesize
+ self.parity = parity
+ self.stopbits = stopbits
+ self.timeout = timeout
+ self.writeTimeout = writeTimeout
+ self.xonxoff = xonxoff
+ self.rtscts = rtscts
+ self.dsrdtr = dsrdtr
+ self.interCharTimeout = interCharTimeout
+
+ if port is not None:
+ self.open()
+
+ def isOpen(self):
+ """Check if the port is opened."""
+ return self._isOpen
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ # TODO: these are not really needed as the is the BAUDRATES etc. attribute...
+ # maybe i remove them before the final release...
+
+ def getSupportedBaudrates(self):
+ return [(str(b), b) for b in self.BAUDRATES]
+
+ def getSupportedByteSizes(self):
+ return [(str(b), b) for b in self.BYTESIZES]
+
+ def getSupportedStopbits(self):
+ return [(str(b), b) for b in self.STOPBITS]
+
+ def getSupportedParities(self):
+ return [(PARITY_NAMES[b], b) for b in self.PARITIES]
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ def setPort(self, port):
+ """\
+ Change the port. The attribute portstr is set to a string that
+ contains the name of the port.
+ """
+
+ was_open = self._isOpen
+ if was_open: self.close()
+ if port is not None:
+ if isinstance(port, basestring):
+ self.portstr = port
+ else:
+ self.portstr = self.makeDeviceName(port)
+ else:
+ self.portstr = None
+ self._port = port
+ self.name = self.portstr
+ if was_open: self.open()
+
+ def getPort(self):
+ """\
+ Get the current port setting. The value that was passed on init or using
+ setPort() is passed back. See also the attribute portstr which contains
+ the name of the port as a string.
+ """
+ return self._port
+
+ port = property(getPort, setPort, doc="Port setting")
+
+
+ def setBaudrate(self, baudrate):
+ """\
+ Change baud rate. It raises a ValueError if the port is open and the
+ baud rate is not possible. If the port is closed, then the value is
+ accepted and the exception is raised when the port is opened.
+ """
+ try:
+ b = int(baudrate)
+ except TypeError:
+ raise ValueError("Not a valid baudrate: %r" % (baudrate,))
+ else:
+ if b <= 0:
+ raise ValueError("Not a valid baudrate: %r" % (baudrate,))
+ self._baudrate = b
+ if self._isOpen: self._reconfigurePort()
+
+ def getBaudrate(self):
+ """Get the current baud rate setting."""
+ return self._baudrate
+
+ baudrate = property(getBaudrate, setBaudrate, doc="Baud rate setting")
+
+
+ def setByteSize(self, bytesize):
+ """Change byte size."""
+ if bytesize not in self.BYTESIZES: raise ValueError("Not a valid byte size: %r" % (bytesize,))
+ self._bytesize = bytesize
+ if self._isOpen: self._reconfigurePort()
+
+ def getByteSize(self):
+ """Get the current byte size setting."""
+ return self._bytesize
+
+ bytesize = property(getByteSize, setByteSize, doc="Byte size setting")
+
+
+ def setParity(self, parity):
+ """Change parity setting."""
+ if parity not in self.PARITIES: raise ValueError("Not a valid parity: %r" % (parity,))
+ self._parity = parity
+ if self._isOpen: self._reconfigurePort()
+
+ def getParity(self):
+ """Get the current parity setting."""
+ return self._parity
+
+ parity = property(getParity, setParity, doc="Parity setting")
+
+
+ def setStopbits(self, stopbits):
+ """Change stop bits size."""
+ if stopbits not in self.STOPBITS: raise ValueError("Not a valid stop bit size: %r" % (stopbits,))
+ self._stopbits = stopbits
+ if self._isOpen: self._reconfigurePort()
+
+ def getStopbits(self):
+ """Get the current stop bits setting."""
+ return self._stopbits
+
+ stopbits = property(getStopbits, setStopbits, doc="Stop bits setting")
+
+
+ def setTimeout(self, timeout):
+ """Change timeout setting."""
+ if timeout is not None:
+ try:
+ timeout + 1 # test if it's a number, will throw a TypeError if not...
+ except TypeError:
+ raise ValueError("Not a valid timeout: %r" % (timeout,))
+ if timeout < 0: raise ValueError("Not a valid timeout: %r" % (timeout,))
+ self._timeout = timeout
+ if self._isOpen: self._reconfigurePort()
+
+ def getTimeout(self):
+ """Get the current timeout setting."""
+ return self._timeout
+
+ timeout = property(getTimeout, setTimeout, doc="Timeout setting for read()")
+
+
+ def setWriteTimeout(self, timeout):
+ """Change timeout setting."""
+ if timeout is not None:
+ if timeout < 0: raise ValueError("Not a valid timeout: %r" % (timeout,))
+ try:
+ timeout + 1 #test if it's a number, will throw a TypeError if not...
+ except TypeError:
+ raise ValueError("Not a valid timeout: %r" % timeout)
+
+ self._writeTimeout = timeout
+ if self._isOpen: self._reconfigurePort()
+
+ def getWriteTimeout(self):
+ """Get the current timeout setting."""
+ return self._writeTimeout
+
+ writeTimeout = property(getWriteTimeout, setWriteTimeout, doc="Timeout setting for write()")
+
+
+ def setXonXoff(self, xonxoff):
+ """Change XON/XOFF setting."""
+ self._xonxoff = xonxoff
+ if self._isOpen: self._reconfigurePort()
+
+ def getXonXoff(self):
+ """Get the current XON/XOFF setting."""
+ return self._xonxoff
+
+ xonxoff = property(getXonXoff, setXonXoff, doc="XON/XOFF setting")
+
+ def setRtsCts(self, rtscts):
+ """Change RTS/CTS flow control setting."""
+ self._rtscts = rtscts
+ if self._isOpen: self._reconfigurePort()
+
+ def getRtsCts(self):
+ """Get the current RTS/CTS flow control setting."""
+ return self._rtscts
+
+ rtscts = property(getRtsCts, setRtsCts, doc="RTS/CTS flow control setting")
+
+ def setDsrDtr(self, dsrdtr=None):
+ """Change DsrDtr flow control setting."""
+ if dsrdtr is None:
+ # if not set, keep backwards compatibility and follow rtscts setting
+ self._dsrdtr = self._rtscts
+ else:
+ # if defined independently, follow its value
+ self._dsrdtr = dsrdtr
+ if self._isOpen: self._reconfigurePort()
+
+ def getDsrDtr(self):
+ """Get the current DSR/DTR flow control setting."""
+ return self._dsrdtr
+
+ dsrdtr = property(getDsrDtr, setDsrDtr, "DSR/DTR flow control setting")
+
+ def setInterCharTimeout(self, interCharTimeout):
+ """Change inter-character timeout setting."""
+ if interCharTimeout is not None:
+ if interCharTimeout < 0: raise ValueError("Not a valid timeout: %r" % interCharTimeout)
+ try:
+ interCharTimeout + 1 # test if it's a number, will throw a TypeError if not...
+ except TypeError:
+ raise ValueError("Not a valid timeout: %r" % interCharTimeout)
+
+ self._interCharTimeout = interCharTimeout
+ if self._isOpen: self._reconfigurePort()
+
+ def getInterCharTimeout(self):
+ """Get the current inter-character timeout setting."""
+ return self._interCharTimeout
+
+ interCharTimeout = property(getInterCharTimeout, setInterCharTimeout, doc="Inter-character timeout setting for read()")
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ _SETTINGS = ('baudrate', 'bytesize', 'parity', 'stopbits', 'xonxoff',
+ 'dsrdtr', 'rtscts', 'timeout', 'writeTimeout', 'interCharTimeout')
+
+ def getSettingsDict(self):
+ """\
+ Get current port settings as a dictionary. For use with
+ applySettingsDict.
+ """
+ return dict([(key, getattr(self, '_'+key)) for key in self._SETTINGS])
+
+ def applySettingsDict(self, d):
+ """\
+ apply stored settings from a dictionary returned from
+ getSettingsDict. it's allowed to delete keys from the dictionary. these
+ values will simply left unchanged.
+ """
+ for key in self._SETTINGS:
+ if d[key] != getattr(self, '_'+key): # check against internal "_" value
+ setattr(self, key, d[key]) # set non "_" value to use properties write function
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ def __repr__(self):
+ """String representation of the current port settings and its state."""
+ return "%s<id=0x%x, open=%s>(port=%r, baudrate=%r, bytesize=%r, parity=%r, stopbits=%r, timeout=%r, xonxoff=%r, rtscts=%r, dsrdtr=%r)" % (
+ self.__class__.__name__,
+ id(self),
+ self._isOpen,
+ self.portstr,
+ self.baudrate,
+ self.bytesize,
+ self.parity,
+ self.stopbits,
+ self.timeout,
+ self.xonxoff,
+ self.rtscts,
+ self.dsrdtr,
+ )
+
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+ # compatibility with io library
+
+ def readable(self): return True
+ def writable(self): return True
+ def seekable(self): return False
+ def readinto(self, b):
+ data = self.read(len(b))
+ n = len(data)
+ try:
+ b[:n] = data
+ except TypeError, err:
+ import array
+ if not isinstance(b, array.array):
+ raise err
+ b[:n] = array.array('b', data)
+ return n
+
+
+if __name__ == '__main__':
+ import sys
+ s = SerialBase()
+ sys.stdout.write('port name: %s\n' % s.portstr)
+ sys.stdout.write('baud rates: %s\n' % s.getSupportedBaudrates())
+ sys.stdout.write('byte sizes: %s\n' % s.getSupportedByteSizes())
+ sys.stdout.write('parities: %s\n' % s.getSupportedParities())
+ sys.stdout.write('stop bits: %s\n' % s.getSupportedStopbits())
+ sys.stdout.write('%s\n' % s)
diff --git a/scripts/serial/tools/__init__.py b/scripts/serial/tools/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/scripts/serial/tools/list_ports.py b/scripts/serial/tools/list_ports.py
new file mode 100644
index 0000000..d373a55
--- /dev/null
+++ b/scripts/serial/tools/list_ports.py
@@ -0,0 +1,103 @@
+#!/usr/bin/env python
+
+# portable serial port access with python
+# this is a wrapper module for different platform implementations of the
+# port enumeration feature
+#
+# (C) 2011-2013 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+
+"""\
+This module will provide a function called comports that returns an
+iterable (generator or list) that will enumerate available com ports. Note that
+on some systems non-existent ports may be listed.
+
+Additionally a grep function is supplied that can be used to search for ports
+based on their descriptions or hardware ID.
+"""
+
+import sys, os, re
+
+# chose an implementation, depending on os
+#~ if sys.platform == 'cli':
+#~ else:
+import os
+# chose an implementation, depending on os
+if os.name == 'nt': #sys.platform == 'win32':
+ from serial.tools.list_ports_windows import *
+elif os.name == 'posix':
+ from serial.tools.list_ports_posix import *
+#~ elif os.name == 'java':
+else:
+ raise ImportError("Sorry: no implementation for your platform ('%s') available" % (os.name,))
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+def grep(regexp):
+ """\
+ Search for ports using a regular expression. Port name, description and
+ hardware ID are searched. The function returns an iterable that returns the
+ same tuples as comport() would do.
+ """
+ r = re.compile(regexp, re.I)
+ for port, desc, hwid in comports():
+ if r.search(port) or r.search(desc) or r.search(hwid):
+ yield port, desc, hwid
+
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+def main():
+ import optparse
+
+ parser = optparse.OptionParser(
+ usage = "%prog [options] [<regexp>]",
+ description = "Miniterm - A simple terminal program for the serial port."
+ )
+
+ parser.add_option("--debug",
+ help="print debug messages and tracebacks (development mode)",
+ dest="debug",
+ default=False,
+ action='store_true')
+
+ parser.add_option("-v", "--verbose",
+ help="show more messages (can be given multiple times)",
+ dest="verbose",
+ default=1,
+ action='count')
+
+ parser.add_option("-q", "--quiet",
+ help="suppress all messages",
+ dest="verbose",
+ action='store_const',
+ const=0)
+
+ (options, args) = parser.parse_args()
+
+
+ hits = 0
+ # get iteraror w/ or w/o filter
+ if args:
+ if len(args) > 1:
+ parser.error('more than one regexp not supported')
+ print "Filtered list with regexp: %r" % (args[0],)
+ iterator = sorted(grep(args[0]))
+ else:
+ iterator = sorted(comports())
+ # list them
+ for port, desc, hwid in iterator:
+ print("%-20s" % (port,))
+ if options.verbose > 1:
+ print(" desc: %s" % (desc,))
+ print(" hwid: %s" % (hwid,))
+ hits += 1
+ if options.verbose:
+ if hits:
+ print("%d ports found" % (hits,))
+ else:
+ print("no ports found")
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+# test
+if __name__ == '__main__':
+ main()
diff --git a/scripts/serial/tools/list_ports_linux.py b/scripts/serial/tools/list_ports_linux.py
new file mode 100644
index 0000000..955761e
--- /dev/null
+++ b/scripts/serial/tools/list_ports_linux.py
@@ -0,0 +1,152 @@
+#!/usr/bin/env python
+
+# portable serial port access with python
+#
+# This is a module that gathers a list of serial ports including details on
+# GNU/Linux systems
+#
+# (C) 2011-2013 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+
+import glob
+import sys
+import os
+import re
+
+try:
+ import subprocess
+except ImportError:
+ def popen(argv):
+ try:
+ si, so = os.popen4(' '.join(argv))
+ return so.read().strip()
+ except:
+ raise IOError('lsusb failed')
+else:
+ def popen(argv):
+ try:
+ return subprocess.check_output(argv, stderr=subprocess.STDOUT).strip()
+ except:
+ raise IOError('lsusb failed')
+
+
+# The comports function is expected to return an iterable that yields tuples of
+# 3 strings: port name, human readable description and a hardware ID.
+#
+# as currently no method is known to get the second two strings easily, they
+# are currently just identical to the port name.
+
+# try to detect the OS so that a device can be selected...
+plat = sys.platform.lower()
+
+def read_line(filename):
+ """\
+ Helper function to read a single line from a file.
+ Returns None on errors..
+ """
+ try:
+ f = open(filename)
+ line = f.readline().strip()
+ f.close()
+ return line
+ except IOError:
+ return None
+
+def re_group(regexp, text):
+ """search for regexp in text, return 1st group on match"""
+ if sys.version < '3':
+ m = re.search(regexp, text)
+ else:
+ # text is bytes-like
+ m = re.search(regexp, text.decode('ascii', 'replace'))
+ if m: return m.group(1)
+
+
+# try to extract descriptions from sysfs. this was done by experimenting,
+# no guarantee that it works for all devices or in the future...
+
+def usb_sysfs_hw_string(sysfs_path):
+ """given a path to a usb device in sysfs, return a string describing it"""
+ bus, dev = os.path.basename(os.path.realpath(sysfs_path)).split('-')
+ snr = read_line(sysfs_path+'/serial')
+ if snr:
+ snr_txt = ' SNR=%s' % (snr,)
+ else:
+ snr_txt = ''
+ return 'USB VID:PID=%s:%s%s' % (
+ read_line(sysfs_path+'/idVendor'),
+ read_line(sysfs_path+'/idProduct'),
+ snr_txt
+ )
+
+def usb_lsusb_string(sysfs_path):
+ base = os.path.basename(os.path.realpath(sysfs_path))
+ bus = base.split('-')[0]
+ try:
+ dev = int(read_line(os.path.join(sysfs_path, 'devnum')))
+ desc = popen(['lsusb', '-v', '-s', '%s:%s' % (bus, dev)])
+ # descriptions from device
+ iManufacturer = re_group('iManufacturer\s+\w+ (.+)', desc)
+ iProduct = re_group('iProduct\s+\w+ (.+)', desc)
+ iSerial = re_group('iSerial\s+\w+ (.+)', desc) or ''
+ # descriptions from kernel
+ idVendor = re_group('idVendor\s+0x\w+ (.+)', desc)
+ idProduct = re_group('idProduct\s+0x\w+ (.+)', desc)
+ # create descriptions. prefer text from device, fall back to the others
+ return '%s %s %s' % (iManufacturer or idVendor, iProduct or idProduct, iSerial)
+ except IOError:
+ return base
+
+def describe(device):
+ """\
+ Get a human readable description.
+ For USB-Serial devices try to run lsusb to get a human readable description.
+ For USB-CDC devices read the description from sysfs.
+ """
+ base = os.path.basename(device)
+ # USB-Serial devices
+ sys_dev_path = '/sys/class/tty/%s/device/driver/%s' % (base, base)
+ if os.path.exists(sys_dev_path):
+ sys_usb = os.path.dirname(os.path.dirname(os.path.realpath(sys_dev_path)))
+ return usb_lsusb_string(sys_usb)
+ # USB-CDC devices
+ sys_dev_path = '/sys/class/tty/%s/device/interface' % (base,)
+ if os.path.exists(sys_dev_path):
+ return read_line(sys_dev_path)
+ # USB Product Information
+ sys_dev_path = '/sys/class/tty/%s/device' % (base,)
+ if os.path.exists(sys_dev_path):
+ product_name_file = os.path.dirname(os.path.realpath(sys_dev_path)) + "/product"
+ if os.path.exists(product_name_file):
+ return read_line(product_name_file)
+ return base
+
+def hwinfo(device):
+ """Try to get a HW identification using sysfs"""
+ base = os.path.basename(device)
+ if os.path.exists('/sys/class/tty/%s/device' % (base,)):
+ # PCI based devices
+ sys_id_path = '/sys/class/tty/%s/device/id' % (base,)
+ if os.path.exists(sys_id_path):
+ return read_line(sys_id_path)
+ # USB-Serial devices
+ sys_dev_path = '/sys/class/tty/%s/device/driver/%s' % (base, base)
+ if os.path.exists(sys_dev_path):
+ sys_usb = os.path.dirname(os.path.dirname(os.path.realpath(sys_dev_path)))
+ return usb_sysfs_hw_string(sys_usb)
+ # USB-CDC devices
+ if base.startswith('ttyACM'):
+ sys_dev_path = '/sys/class/tty/%s/device' % (base,)
+ if os.path.exists(sys_dev_path):
+ return usb_sysfs_hw_string(sys_dev_path + '/..')
+ return 'n/a' # XXX directly remove these from the list?
+
+def comports():
+ devices = glob.glob('/dev/ttyS*') + glob.glob('/dev/ttyUSB*') + glob.glob('/dev/ttyACM*')
+ return [(d, describe(d), hwinfo(d)) for d in devices]
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+# test
+if __name__ == '__main__':
+ for port, desc, hwid in sorted(comports()):
+ print "%s: %s [%s]" % (port, desc, hwid)
diff --git a/scripts/serial/urlhandler/__init__.py b/scripts/serial/urlhandler/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/scripts/serial/urlhandler/protocol_hwgrep.py b/scripts/serial/urlhandler/protocol_hwgrep.py
new file mode 100644
index 0000000..62cda43
--- /dev/null
+++ b/scripts/serial/urlhandler/protocol_hwgrep.py
@@ -0,0 +1,45 @@
+#! python
+#
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# see __init__.py
+#
+# This module implements a special URL handler that uses the port listing to
+# find ports by searching the string descriptions.
+#
+# (C) 2011 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+#
+# URL format: hwgrep://regexp
+
+import serial
+import serial.tools.list_ports
+
+class Serial(serial.Serial):
+ """Just inherit the native Serial port implementation and patch the open function."""
+
+ def setPort(self, value):
+ """translate port name before storing it"""
+ if isinstance(value, basestring) and value.startswith('hwgrep://'):
+ serial.Serial.setPort(self, self.fromURL(value))
+ else:
+ serial.Serial.setPort(self, value)
+
+ def fromURL(self, url):
+ """extract host and port from an URL string"""
+ if url.lower().startswith("hwgrep://"): url = url[9:]
+ # use a for loop to get the 1st element from the generator
+ for port, desc, hwid in serial.tools.list_ports.grep(url):
+ return port
+ else:
+ raise serial.SerialException('no ports found matching regexp %r' % (url,))
+
+ # override property
+ port = property(serial.Serial.getPort, setPort, doc="Port setting")
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+if __name__ == '__main__':
+ #~ s = Serial('hwgrep://ttyS0')
+ s = Serial(None)
+ s.port = 'hwgrep://ttyS0'
+ print s
+
diff --git a/scripts/serial/urlhandler/protocol_loop.py b/scripts/serial/urlhandler/protocol_loop.py
new file mode 100644
index 0000000..a414839
--- /dev/null
+++ b/scripts/serial/urlhandler/protocol_loop.py
@@ -0,0 +1,279 @@
+#! python
+#
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# see __init__.py
+#
+# This module implements a loop back connection receiving itself what it sent.
+#
+# The purpose of this module is.. well... You can run the unit tests with it.
+# and it was so easy to implement ;-)
+#
+# (C) 2001-2011 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+#
+# URL format: loop://[option[/option...]]
+# options:
+# - "debug" print diagnostic messages
+
+from serial.serialutil import *
+import threading
+import time
+import logging
+
+# map log level names to constants. used in fromURL()
+LOGGER_LEVELS = {
+ 'debug': logging.DEBUG,
+ 'info': logging.INFO,
+ 'warning': logging.WARNING,
+ 'error': logging.ERROR,
+ }
+
+
+class LoopbackSerial(SerialBase):
+ """Serial port implementation that simulates a loop back connection in plain software."""
+
+ BAUDRATES = (50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
+ 9600, 19200, 38400, 57600, 115200)
+
+ def open(self):
+ """\
+ Open port with current settings. This may throw a SerialException
+ if the port cannot be opened.
+ """
+ if self._isOpen:
+ raise SerialException("Port is already open.")
+ self.logger = None
+ self.buffer_lock = threading.Lock()
+ self.loop_buffer = bytearray()
+ self.cts = False
+ self.dsr = False
+
+ if self._port is None:
+ raise SerialException("Port must be configured before it can be used.")
+ # not that there is anything to open, but the function applies the
+ # options found in the URL
+ self.fromURL(self.port)
+
+ # not that there anything to configure...
+ self._reconfigurePort()
+ # all things set up get, now a clean start
+ self._isOpen = True
+ if not self._rtscts:
+ self.setRTS(True)
+ self.setDTR(True)
+ self.flushInput()
+ self.flushOutput()
+
+ def _reconfigurePort(self):
+ """\
+ Set communication parameters on opened port. For the loop://
+ protocol all settings are ignored!
+ """
+ # not that's it of any real use, but it helps in the unit tests
+ if not isinstance(self._baudrate, (int, long)) or not 0 < self._baudrate < 2**32:
+ raise ValueError("invalid baudrate: %r" % (self._baudrate))
+ if self.logger:
+ self.logger.info('_reconfigurePort()')
+
+ def close(self):
+ """Close port"""
+ if self._isOpen:
+ self._isOpen = False
+ # in case of quick reconnects, give the server some time
+ time.sleep(0.3)
+
+ def makeDeviceName(self, port):
+ raise SerialException("there is no sensible way to turn numbers into URLs")
+
+ def fromURL(self, url):
+ """extract host and port from an URL string"""
+ if url.lower().startswith("loop://"): url = url[7:]
+ try:
+ # process options now, directly altering self
+ for option in url.split('/'):
+ if '=' in option:
+ option, value = option.split('=', 1)
+ else:
+ value = None
+ if not option:
+ pass
+ elif option == 'logging':
+ logging.basicConfig() # XXX is that good to call it here?
+ self.logger = logging.getLogger('pySerial.loop')
+ self.logger.setLevel(LOGGER_LEVELS[value])
+ self.logger.debug('enabled logging')
+ else:
+ raise ValueError('unknown option: %r' % (option,))
+ except ValueError, e:
+ raise SerialException('expected a string in the form "[loop://][option[/option...]]": %s' % e)
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ def inWaiting(self):
+ """Return the number of characters currently in the input buffer."""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ # attention the logged value can differ from return value in
+ # threaded environments...
+ self.logger.debug('inWaiting() -> %d' % (len(self.loop_buffer),))
+ return len(self.loop_buffer)
+
+ def read(self, size=1):
+ """\
+ Read size bytes from the serial port. If a timeout is set it may
+ return less characters as requested. With no timeout it will block
+ until the requested number of bytes is read.
+ """
+ if not self._isOpen: raise portNotOpenError
+ if self._timeout is not None:
+ timeout = time.time() + self._timeout
+ else:
+ timeout = None
+ data = bytearray()
+ while size > 0:
+ self.buffer_lock.acquire()
+ try:
+ block = to_bytes(self.loop_buffer[:size])
+ del self.loop_buffer[:size]
+ finally:
+ self.buffer_lock.release()
+ data += block
+ size -= len(block)
+ # check for timeout now, after data has been read.
+ # useful for timeout = 0 (non blocking) read
+ if timeout and time.time() > timeout:
+ break
+ return bytes(data)
+
+ def write(self, data):
+ """\
+ Output the given string over the serial port. Can block if the
+ connection is blocked. May raise SerialException if the connection is
+ closed.
+ """
+ if not self._isOpen: raise portNotOpenError
+ # ensure we're working with bytes
+ data = to_bytes(data)
+ # calculate aprox time that would be used to send the data
+ time_used_to_send = 10.0*len(data) / self._baudrate
+ # when a write timeout is configured check if we would be successful
+ # (not sending anything, not even the part that would have time)
+ if self._writeTimeout is not None and time_used_to_send > self._writeTimeout:
+ time.sleep(self._writeTimeout) # must wait so that unit test succeeds
+ raise writeTimeoutError
+ self.buffer_lock.acquire()
+ try:
+ self.loop_buffer += data
+ finally:
+ self.buffer_lock.release()
+ return len(data)
+
+ def flushInput(self):
+ """Clear input buffer, discarding all that is in the buffer."""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('flushInput()')
+ self.buffer_lock.acquire()
+ try:
+ del self.loop_buffer[:]
+ finally:
+ self.buffer_lock.release()
+
+ def flushOutput(self):
+ """\
+ Clear output buffer, aborting the current output and
+ discarding all that is in the buffer.
+ """
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('flushOutput()')
+
+ def sendBreak(self, duration=0.25):
+ """\
+ Send break condition. Timed, returns to idle state after given
+ duration.
+ """
+ if not self._isOpen: raise portNotOpenError
+
+ def setBreak(self, level=True):
+ """\
+ Set break: Controls TXD. When active, to transmitting is
+ possible.
+ """
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('setBreak(%r)' % (level,))
+
+ def setRTS(self, level=True):
+ """Set terminal status line: Request To Send"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('setRTS(%r) -> state of CTS' % (level,))
+ self.cts = level
+
+ def setDTR(self, level=True):
+ """Set terminal status line: Data Terminal Ready"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('setDTR(%r) -> state of DSR' % (level,))
+ self.dsr = level
+
+ def getCTS(self):
+ """Read terminal status line: Clear To Send"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('getCTS() -> state of RTS (%r)' % (self.cts,))
+ return self.cts
+
+ def getDSR(self):
+ """Read terminal status line: Data Set Ready"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('getDSR() -> state of DTR (%r)' % (self.dsr,))
+ return self.dsr
+
+ def getRI(self):
+ """Read terminal status line: Ring Indicator"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('returning dummy for getRI()')
+ return False
+
+ def getCD(self):
+ """Read terminal status line: Carrier Detect"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('returning dummy for getCD()')
+ return True
+
+ # - - - platform specific - - -
+ # None so far
+
+
+# assemble Serial class with the platform specific implementation and the base
+# for file-like behavior. for Python 2.6 and newer, that provide the new I/O
+# library, derive from io.RawIOBase
+try:
+ import io
+except ImportError:
+ # classic version with our own file-like emulation
+ class Serial(LoopbackSerial, FileLike):
+ pass
+else:
+ # io library present
+ class Serial(LoopbackSerial, io.RawIOBase):
+ pass
+
+
+# simple client test
+if __name__ == '__main__':
+ import sys
+ s = Serial('loop://')
+ sys.stdout.write('%s\n' % s)
+
+ sys.stdout.write("write...\n")
+ s.write("hello\n")
+ s.flush()
+ sys.stdout.write("read: %s\n" % s.read(5))
+
+ s.close()
diff --git a/scripts/serial/urlhandler/protocol_rfc2217.py b/scripts/serial/urlhandler/protocol_rfc2217.py
new file mode 100644
index 0000000..981ba45
--- /dev/null
+++ b/scripts/serial/urlhandler/protocol_rfc2217.py
@@ -0,0 +1,11 @@
+#! python
+#
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# see ../__init__.py
+#
+# This is a thin wrapper to load the rfc2271 implementation.
+#
+# (C) 2011 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+
+from serial.rfc2217 import Serial
diff --git a/scripts/serial/urlhandler/protocol_socket.py b/scripts/serial/urlhandler/protocol_socket.py
new file mode 100644
index 0000000..dc59923
--- /dev/null
+++ b/scripts/serial/urlhandler/protocol_socket.py
@@ -0,0 +1,291 @@
+#! python
+#
+# Python Serial Port Extension for Win32, Linux, BSD, Jython
+# see __init__.py
+#
+# This module implements a simple socket based client.
+# It does not support changing any port parameters and will silently ignore any
+# requests to do so.
+#
+# The purpose of this module is that applications using pySerial can connect to
+# TCP/IP to serial port converters that do not support RFC 2217.
+#
+# (C) 2001-2011 Chris Liechti <cliechti at gmx.net>
+# this is distributed under a free software license, see license.txt
+#
+# URL format: socket://<host>:<port>[/option[/option...]]
+# options:
+# - "debug" print diagnostic messages
+
+from serial.serialutil import *
+import time
+import socket
+import select
+import logging
+
+# map log level names to constants. used in fromURL()
+LOGGER_LEVELS = {
+ 'debug': logging.DEBUG,
+ 'info': logging.INFO,
+ 'warning': logging.WARNING,
+ 'error': logging.ERROR,
+ }
+
+POLL_TIMEOUT = 2
+
+class SocketSerial(SerialBase):
+ """Serial port implementation for plain sockets."""
+
+ BAUDRATES = (50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
+ 9600, 19200, 38400, 57600, 115200)
+
+ def open(self):
+ """\
+ Open port with current settings. This may throw a SerialException
+ if the port cannot be opened.
+ """
+ self.logger = None
+ if self._port is None:
+ raise SerialException("Port must be configured before it can be used.")
+ if self._isOpen:
+ raise SerialException("Port is already open.")
+ try:
+ # XXX in future replace with create_connection (py >=2.6)
+ self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+ self._socket.connect(self.fromURL(self.portstr))
+ except Exception, msg:
+ self._socket = None
+ raise SerialException("Could not open port %s: %s" % (self.portstr, msg))
+
+ self._socket.settimeout(POLL_TIMEOUT) # used for write timeout support :/
+
+ # not that there anything to configure...
+ self._reconfigurePort()
+ # all things set up get, now a clean start
+ self._isOpen = True
+ if not self._rtscts:
+ self.setRTS(True)
+ self.setDTR(True)
+ self.flushInput()
+ self.flushOutput()
+
+ def _reconfigurePort(self):
+ """\
+ Set communication parameters on opened port. For the socket://
+ protocol all settings are ignored!
+ """
+ if self._socket is None:
+ raise SerialException("Can only operate on open ports")
+ if self.logger:
+ self.logger.info('ignored port configuration change')
+
+ def close(self):
+ """Close port"""
+ if self._isOpen:
+ if self._socket:
+ try:
+ self._socket.shutdown(socket.SHUT_RDWR)
+ self._socket.close()
+ except:
+ # ignore errors.
+ pass
+ self._socket = None
+ self._isOpen = False
+ # in case of quick reconnects, give the server some time
+ time.sleep(0.3)
+
+ def makeDeviceName(self, port):
+ raise SerialException("there is no sensible way to turn numbers into URLs")
+
+ def fromURL(self, url):
+ """extract host and port from an URL string"""
+ if url.lower().startswith("socket://"): url = url[9:]
+ try:
+ # is there a "path" (our options)?
+ if '/' in url:
+ # cut away options
+ url, options = url.split('/', 1)
+ # process options now, directly altering self
+ for option in options.split('/'):
+ if '=' in option:
+ option, value = option.split('=', 1)
+ else:
+ value = None
+ if option == 'logging':
+ logging.basicConfig() # XXX is that good to call it here?
+ self.logger = logging.getLogger('pySerial.socket')
+ self.logger.setLevel(LOGGER_LEVELS[value])
+ self.logger.debug('enabled logging')
+ else:
+ raise ValueError('unknown option: %r' % (option,))
+ # get host and port
+ host, port = url.split(':', 1) # may raise ValueError because of unpacking
+ port = int(port) # and this if it's not a number
+ if not 0 <= port < 65536: raise ValueError("port not in range 0...65535")
+ except ValueError, e:
+ raise SerialException('expected a string in the form "[rfc2217://]<host>:<port>[/option[/option...]]": %s' % e)
+ return (host, port)
+
+ # - - - - - - - - - - - - - - - - - - - - - - - -
+
+ def inWaiting(self):
+ """Return the number of characters currently in the input buffer."""
+ if not self._isOpen: raise portNotOpenError
+ # Poll the socket to see if it is ready for reading.
+ # If ready, at least one byte will be to read.
+ lr, lw, lx = select.select([self._socket], [], [], 0)
+ return len(lr)
+
+ def read(self, size=1):
+ """\
+ Read size bytes from the serial port. If a timeout is set it may
+ return less characters as requested. With no timeout it will block
+ until the requested number of bytes is read.
+ """
+ if not self._isOpen: raise portNotOpenError
+ data = bytearray()
+ if self._timeout is not None:
+ timeout = time.time() + self._timeout
+ else:
+ timeout = None
+ while len(data) < size and (timeout is None or time.time() < timeout):
+ try:
+ # an implementation with internal buffer would be better
+ # performing...
+ t = time.time()
+ block = self._socket.recv(size - len(data))
+ duration = time.time() - t
+ if block:
+ data.extend(block)
+ else:
+ # no data -> EOF (connection probably closed)
+ break
+ except socket.timeout:
+ # just need to get out of recv from time to time to check if
+ # still alive
+ continue
+ except socket.error, e:
+ # connection fails -> terminate loop
+ raise SerialException('connection failed (%s)' % e)
+ return bytes(data)
+
+ def write(self, data):
+ """\
+ Output the given string over the serial port. Can block if the
+ connection is blocked. May raise SerialException if the connection is
+ closed.
+ """
+ if not self._isOpen: raise portNotOpenError
+ try:
+ self._socket.sendall(to_bytes(data))
+ except socket.error, e:
+ # XXX what exception if socket connection fails
+ raise SerialException("socket connection failed: %s" % e)
+ return len(data)
+
+ def flushInput(self):
+ """Clear input buffer, discarding all that is in the buffer."""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('ignored flushInput')
+
+ def flushOutput(self):
+ """\
+ Clear output buffer, aborting the current output and
+ discarding all that is in the buffer.
+ """
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('ignored flushOutput')
+
+ def sendBreak(self, duration=0.25):
+ """\
+ Send break condition. Timed, returns to idle state after given
+ duration.
+ """
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('ignored sendBreak(%r)' % (duration,))
+
+ def setBreak(self, level=True):
+ """Set break: Controls TXD. When active, to transmitting is
+ possible."""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('ignored setBreak(%r)' % (level,))
+
+ def setRTS(self, level=True):
+ """Set terminal status line: Request To Send"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('ignored setRTS(%r)' % (level,))
+
+ def setDTR(self, level=True):
+ """Set terminal status line: Data Terminal Ready"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('ignored setDTR(%r)' % (level,))
+
+ def getCTS(self):
+ """Read terminal status line: Clear To Send"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('returning dummy for getCTS()')
+ return True
+
+ def getDSR(self):
+ """Read terminal status line: Data Set Ready"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('returning dummy for getDSR()')
+ return True
+
+ def getRI(self):
+ """Read terminal status line: Ring Indicator"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('returning dummy for getRI()')
+ return False
+
+ def getCD(self):
+ """Read terminal status line: Carrier Detect"""
+ if not self._isOpen: raise portNotOpenError
+ if self.logger:
+ self.logger.info('returning dummy for getCD()')
+ return True
+
+ # - - - platform specific - - -
+
+ # works on Linux and probably all the other POSIX systems
+ def fileno(self):
+ """Get the file handle of the underlying socket for use with select"""
+ return self._socket.fileno()
+
+
+# assemble Serial class with the platform specific implementation and the base
+# for file-like behavior. for Python 2.6 and newer, that provide the new I/O
+# library, derive from io.RawIOBase
+try:
+ import io
+except ImportError:
+ # classic version with our own file-like emulation
+ class Serial(SocketSerial, FileLike):
+ pass
+else:
+ # io library present
+ class Serial(SocketSerial, io.RawIOBase):
+ pass
+
+
+# simple client test
+if __name__ == '__main__':
+ import sys
+ s = Serial('socket://localhost:7000')
+ sys.stdout.write('%s\n' % s)
+
+ sys.stdout.write("write...\n")
+ s.write("hello\n")
+ s.flush()
+ sys.stdout.write("read: %s\n" % s.read(5))
+
+ s.close()
--
2.6.4
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