From: Jan Luebbe <jlu@xxxxxxxxxxxxxx> The current pyserial is broken, this version contains the fix for: http://sourceforge.net/p/pyserial/bugs/166/ Signed-off-by: Jan Luebbe <jlu@xxxxxxxxxxxxxx> --- .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@xxxxxxx> +# 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@xxxxxxx> +# 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@xxxxxxx> +# 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@xxxxxxx> +# this is distributed under a free software license, see license.txt +# +# parts based on code from Grant B. Edwards <grante@xxxxxxxx>: +# 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@xxxxxxx> +# 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@xxxxxxx> +# 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@xxxxxxx> +# 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@xxxxxxx> +# 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@xxxxxxx> +# 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@xxxxxxx> +# 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@xxxxxxx> +# 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 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
