pyinst: scpi.py annotate

annotate scpi.py @ 28:c6be52360c2f

Handle default port better so passing None in picks the default.

author	Daniel O'Connor <darius@dons.net.au>
date	Wed, 21 Sep 2011 14:56:55 +0930
parents	e2833d081413
children	00800345fbae

rev	line source
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	1 #!/usr/bin/env python
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	2
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	3 # Copyright (c) 2011
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	4 # Daniel O'Connor <darius@dons.net.au>. All rights reserved.
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	5 #
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	6 # Redistribution and use in source and binary forms, with or without
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	7 # modification, are permitted provided that the following conditions
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	8 # are met:
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	9 # 1. Redistributions of source code must retain the above copyright
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	10 # notice, this list of conditions and the following disclaimer.
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	11 # 2. Redistributions in binary form must reproduce the above copyright
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	12 # notice, this list of conditions and the following disclaimer in the
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	13 # documentation and/or other materials provided with the distribution.
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	14 #
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	15 # THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	18 # ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	25 # SUCH DAMAGE.
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	26 #
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	27
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	28 import exceptions
37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	29 import numpy
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	30 import re
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	31
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	32 headerre = re.compile('^(:[A-Z:]+ ).*')
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	33 insturlre = re.compile('([a-zA-Z0-9]+)://(([^:]+)?(:([^/]+)@))?([^:]+)(:(.+))?')
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	34
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	35 def query(d, q, timeout = None):
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	36 d.write(q)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	37 return d.read(timeout)
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	38
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	39 def clean(data):
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	40 # The instrument might return some header before the data (TEK 2024B does this)
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	41 m = headerre.match(data)
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	42 if m == None:
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	43 return data
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	44 else:
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	45 hlen = len(m.groups()[0])
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	46 return(data[hlen:])
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	47
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	48 def getdata(data, dtype = float):
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	49 '''Get a single data item'''
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	50 data = clean(data)
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	51 return dtype(data)
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	52
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	53 def bindecode(data, dtype = numpy.float32):
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	54 '''Decode binary data, returns numpy array'''
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	55
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	56 data = clean(data)
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	57
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	58 if data[0] != '#':
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	59 raise exceptions.ValueError('data length header incorrect')
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	60 dlenlen = int(data[1])
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	61 if dlenlen == 0:
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	62 return numpy.array([])
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	63
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	64 dlen = int(data[2:dlenlen + 2])
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	65 if dlen == 0:
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	66 return numpy.array([])
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	67
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	68 wanted = dlen + 2 + dlenlen
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	69 # Chop off the trailing \n if necessary
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	70 if len(data) == wanted + 1 and data[-1] == '\n':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	71 data = data[0:-1]
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	72
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	73 if len(data) != wanted:
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	74 raise exceptions.ValueError('length mismatch, header says %d, actually got %d bytes' % (wanted, len(data)))
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	75 return numpy.frombuffer(data[2 + dlenlen:], dtype = dtype)
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	76
20 a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	77 def ascdecode(data, dtype = numpy.float32, sep = None):
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	78 '''Decode ASCII data, returns numpy array'''
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	79
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	80 data = clean(data)
20 a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	81
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	82 # Strip length off if present as we don't need it
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	83 if data[0] == '#':
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	84 l = int(data[1])
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	85 data = data[l + 2:]
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	86
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	87 # Take a guess at the separator
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	88 if sep == None:
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	89 if data.find(',', 0, 20) != -1:
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	90 sep = ','
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	91 else:
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	92 sep = ' '
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	93 return numpy.fromstring(data, dtype = dtype, sep = sep)
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	94
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	95
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	96 def instURL(url):
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	97 m = insturlre.match(url)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	98 if m == None:
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	99 raise exceptions.ValueError('Unable to parse URL')
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	100 proto, xxx, user, xxx, pwd, address, xxx, port = m.groups()
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	101 if proto == 'rsib':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	102 import rsib
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	103 return rsib.RSIBDevice(address, port)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	104 elif proto == 'usb':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	105 import usb488
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	106 return usb488.USB488Device()
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	107 elif proto == 'vxi':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	108 import vxi
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	109 if port == None:
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	110 port = 'inst0'
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	111 return vxi.VXIDevice(address, device = port)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	112 elif proto == 'scpi':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	113 import scpisock
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	114 return scpisock.SCPISockDevice(address, port)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	115 else:
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	116 raise exceptions.NotImplementedError("unknown protocol " + proto)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	117
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	118

Mercurial > ~darius > hgwebdir.cgi > pyinst

annotate scpi.py @ 28:c6be52360c2f