pyinst: scpi.py annotate

annotate scpi.py @ 84:4b4ae555067b

Use RMS detector and fix the sweep time for more accuracy. Add links to app notes discussing theory. Run forever without pause and print a summary on ctrl-c

author	Daniel O'Connor <doconnor@gsoft.com.au>
date	Thu, 03 Oct 2024 08:57:10 +0930
parents	ca5a822c550a
children

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 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	29 import re
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	30
73 ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	31 headerre = re.compile(b'^(:[A-Z:]+ ).*')
ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	32 insturlre = re.compile(b'([a-zA-Z0-9]+)://(([^:]+)?(:([^/]+)@))?([^:]+)(:(.+))?')
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	33
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	34 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	35 d.write(q)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	36 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	37
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	38 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	39 # 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	40 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	41 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	42 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	43 else:
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	44 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	45 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	46
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	47 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	48 '''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	49 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	50 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	51
73 ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	52 def getbin(data):
ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	53 '''Fetch binary blob, strips ASCII length header and checks'''
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	54 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	55
73 ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	56 if data[0] != ord('#'):
71 00800345fbae Python3ise RSIB code Daniel O'Connor <doconnor@gsoft.com.au> parents: 27 diff changeset	57 raise ValueError('data length header incorrect')
73 ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	58 dlenlen = int(chr(data[1]))
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	59 if dlenlen == 0:
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	60 return numpy.array([])
73 ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	61
17 20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	62 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	63 if dlen == 0:
73 ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	64 return b''
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	65
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	66 wanted = dlen + 2 + dlenlen
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	67 # 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	68 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	69 data = data[0:-1]
73 ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	70
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	71 if len(data) != wanted:
71 00800345fbae Python3ise RSIB code Daniel O'Connor <doconnor@gsoft.com.au> parents: 27 diff changeset	72 raise ValueError('length mismatch, header says %d, actually got %d bytes' % (wanted, len(data)))
73 ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	73
ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	74 return data[2 + dlenlen:]
ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	75
ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	76 def bindecode(data, dtype = numpy.float32):
ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	77 '''Decode binary data, returns numpy array'''
ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	78
ca5a822c550a Fix for Python 3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 71 diff changeset	79 return numpy.frombuffer(getbin(data), dtype = dtype)
15 37d6ceb4850f Add helper functions for SCPI. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	80
20 a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	81 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	82 '''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	83
20df02be818a Work out the header using an RE and scrub it automatically. Daniel O'Connor <darius@dons.net.au> parents: 15 diff changeset	84 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	85
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	86 # 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	87 if data[0] == '#':
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	88 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	89 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	90
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	91 # 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	92 if sep == None:
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	93 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	94 sep = ','
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	95 else:
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	96 sep = ' '
a124aa7067e7 Make ascdecode smarter so it can handle Anritsu ASCII. Daniel O'Connor <darius@dons.net.au> parents: 17 diff changeset	97 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	98
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	99
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	100 def instURL(url):
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	101 m = insturlre.match(url)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	102 if m == None:
71 00800345fbae Python3ise RSIB code Daniel O'Connor <doconnor@gsoft.com.au> parents: 27 diff changeset	103 raise ValueError('Unable to parse URL')
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	104 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	105 if proto == 'rsib':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	106 import rsib
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	107 return rsib.RSIBDevice(address, port)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	108 elif proto == 'usb':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	109 import usb488
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	110 return usb488.USB488Device()
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	111 elif proto == 'vxi':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	112 import vxi
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	113 if port == None:
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	114 port = 'inst0'
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	115 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	116 elif proto == 'scpi':
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	117 import scpisock
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	118 return scpisock.SCPISockDevice(address, port)
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	119 else:
71 00800345fbae Python3ise RSIB code Daniel O'Connor <doconnor@gsoft.com.au> parents: 27 diff changeset	120 raise NotImplementedError("unknown protocol " + proto)
27 e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	121
e2833d081413 - Handle zero length data from the instrument. Daniel O'Connor <darius@dons.net.au> parents: 20 diff changeset	122

Mercurial > ~darius > hgwebdir.cgi > pyinst

annotate scpi.py @ 84:4b4ae555067b