serialposix.py

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#!/usr/bin/env python
#module for serial IO for POSIX compatible systems, like Linux
#see __init__.py
#
#(C) 2001-2002 Chris Liechti <[e-mail]>
# this is distributed under a free software license, see license.txt
#
#parts based on code from Grant B. Edwards  <[e-mail]>:
#  ftp://ftp.visi.com/users/grante/python/PosixSerial.py
# references: http://www.easysw.com/~mike/serial/serial.html

import sys, os, fcntl, termios, struct, string, select
import serialutil

VERSION = string.split("$Revision: 1.1 $")[1]     #extract CVS version

PARITY_NONE, PARITY_EVEN, PARITY_ODD = range(3)
STOPBITS_ONE, STOPBITS_TWO = (1, 2)
FIVEBITS, SIXBITS, SEVENBITS, EIGHTBITS = (5,6,7,8)

#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...
plat = string.lower(sys.platform)

if   plat[:5] == 'linux':    #Linux (confirmed)
    def device(port):
        return '/dev/ttyS%d' % port

elif plat == 'cygwin':       #cywin/win32 (confirmed)
    def device(port):
        return '/dev/com%d' % (port + 1)

elif plat     == 'openbsd3': #BSD (confirmed)
    def device(port):
        return '/dev/ttyp%d' % port

elif plat[:3] == 'bsd' or  \
     plat[:6] == 'netbsd' or \
     plat[:7] == 'freebsd' or \
     plat[:7] == 'openbsd' or \
     plat[:6] == 'darwin':   #BSD (confirmed for freebsd4: cuaa%d)
    def device(port):
        return '/dev/cuaa%d' % port

elif plat[:4] == 'irix':     #IRIX