pyinst: usb488.py annotate

annotate usb488.py @ 56:91b476ebc0f2

Run through 2to3

author	Daniel O'Connor <doconnor@gsoft.com.au>
date	Tue, 08 Dec 2020 14:00:45 +1030
parents	ad5942d22f78
children	19045ad9f5f5

rev	line source
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	1 #!/usr/bin/env python
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	2
7 813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	3 # Copyright (c) 2009
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	4 # Daniel O'Connor <darius@dons.net.au>. All rights reserved.
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	5 #
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	6 # Redistribution and use in source and binary forms, with or without
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	7 # modification, are permitted provided that the following conditions
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	8 # are met:
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	9 # 1. Redistributions of source code must retain the above copyright
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	10 # notice, this list of conditions and the following disclaimer.
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	11 # 2. Redistributions in binary form must reproduce the above copyright
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	12 # notice, this list of conditions and the following disclaimer in the
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	13 # documentation and/or other materials provided with the distribution.
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	14 #
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	15 # THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	18 # ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	25 # SUCH DAMAGE.
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	26 #
813e183cfd49 Add 2 clause BSDL. Daniel O'Connor <darius@dons.net.au> parents: 5 diff changeset	27
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	28 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	29 # Spec/info..
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	30 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	31 # http://www.usb.org/developers/devclass_docs/USBTMC_1_006a.zip
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	32 # http://svn.openmoko.org/developers/werner/ahrt/host/tmc/README
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	33 # http://www.home.agilent.com/agilent/redirector.jspx?action=ref&cname=AGILENT_EDITORIAL&ckey=1189335&lc=eng&cc=US&nfr=-35560.0.00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	34 # linux-2.6.29.3/drivers/usb/class/usbtmc.c
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	35 # http://sdpha2.ucsd.edu/Lab_Equip_Manuals/usbtmc_usb488_subclass_1_00.pdf
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	36 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	37
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	38 import usb
56 91b476ebc0f2 Run through 2to3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 55 diff changeset	39 from functools import reduce
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	40
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	41 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	42 # The usual SCPI commands are wrapped before being sent.
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	43 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	44 # Write:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	45 # Offset Field Size Value Description
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	46 # 0 MsgID 1 0x01 DEV_DEP_MSG_OUT
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	47 # 1 bTag 1 0x01 Varies with each transfer
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	48 # 2 bTagInverse 1 0xfe Inverse of previous field
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	49 # 3 Reserved 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	50 # 4 TransferSize 4 0x06
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	51 # 5 .. 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	52 # 6 .. 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	53 # 7 .. 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	54 # 8 bmTransferAttr 1 0x01 1 == end of msg
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	55 # 9 Reserved 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	56 # 10 Reserved 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	57 # 11 Reserved 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	58 # 12 Msg itself 1 0x2a '*'
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	59 # 13 1 0x49 'I'
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	60 # 14 1 0x44 'D'
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	61 # 15 1 0x4e 'N'
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	62 # 16 1 0x3f '?'
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	63 # 17 1 0x0a '\n'
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	64 # 18-19 Alignment 2 0x0000 Bring into 4 byte alignment
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	65 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	66 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	67 # Send a read request:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	68 # Offset Field Size Value Description
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	69 # 0 MsgID 1 0x02 REQUEST_DEV_DEP_MSG_IN
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	70 # 1 bTag 1 0x02 Varies with each transfer
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	71 # 2 bTagInverse 1 0xfd Inverse of previous field
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	72 # 3 Reserved 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	73 # 4 TransferSize 4 0x64
9 a6b746654ae2 Fix comment mangle. Daniel O'Connor <darius@dons.net.au> parents: 8 diff changeset	74 # 5 .. 0x00
a6b746654ae2 Fix comment mangle. Daniel O'Connor <darius@dons.net.au> parents: 8 diff changeset	75 # 6 .. 0x00
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	76 # 7 .. 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	77 # 8 bmTransferAttr 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	78 # 9 Term char 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	79 # 10 Reserved 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	80 # 11 Reserved 1 0x00
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	81
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	82 # No libusb versions of these available
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	83 USB_CLASS_APP_SPECIFIC = 254
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	84 USB_SUBCLASS_TMC = 3
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	85 USB_PROTOCOL_488 = 1
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	86
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	87 # USB488 message IDs
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	88 DEV_DEP_MSG_OUT = 1
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	89 REQUEST_DEV_DEP_MSG_IN = 2
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	90 DEV_DEP_MSG_IN = 2
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	91
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	92 class USB488Device(object):
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	93 def __init__(self, vendor = None, product = None, serial = None, path = None):
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	94 """Search for a USB488 class device, if specified vendor,
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	95 product, serial and path will refine the search"""
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	96
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	97 busses = usb.busses()
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	98
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	99 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	100 # Search for the device we want
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	101 #
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	102 found = False
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	103 for bus in busses:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	104 for dev in bus.devices:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	105 # Skip ones that don't match
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	106 if vendor != None and dev.idVendor != vendor:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	107 continue
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	108 if product != None and dev.idProduct != product:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	109 continue
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	110 if serial != None and dev.idSerialNumber != serial:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	111 continue
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	112 if path != None and dev.filename != path:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	113 continue
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	114
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	115 # The libusb examples say you can check for device
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	116 # class and then open, however in that case you can't
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	117 # find the endpoint number which seems pretty useless
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	118 # unless you want to hard code everything.
56 91b476ebc0f2 Run through 2to3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 55 diff changeset	119 for confidx in range(len(dev.configurations)):
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	120 for iface in dev.configurations[confidx].interfaces:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	121 for altif in iface:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	122 # Check if this is a USB488 capable interface
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	123 if altif.interfaceClass == USB_CLASS_APP_SPECIFIC and \
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	124 altif.interfaceSubClass == USB_SUBCLASS_TMC and \
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	125 altif.interfaceProtocol == USB_PROTOCOL_488:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	126 found = True
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	127 break
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	128 if found:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	129 break
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	130 if found:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	131 break
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	132 if found:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	133 break
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	134 if found:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	135 break
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	136 if not found:
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	137 raise BaseException("Could not find a suitable USB device")
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	138
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	139 # Open the device and claim the USB interface that supports the spec
8 381ed6f3d2d7 Save handle after using it, makes the code look nicer. Daniel O'Connor <darius@dons.net.au> parents: 7 diff changeset	140 handle = dev.open()
381ed6f3d2d7 Save handle after using it, makes the code look nicer. Daniel O'Connor <darius@dons.net.au> parents: 7 diff changeset	141 handle.setConfiguration(dev.configurations[confidx].value)
381ed6f3d2d7 Save handle after using it, makes the code look nicer. Daniel O'Connor <darius@dons.net.au> parents: 7 diff changeset	142 handle.claimInterface(altif.interfaceNumber)
381ed6f3d2d7 Save handle after using it, makes the code look nicer. Daniel O'Connor <darius@dons.net.au> parents: 7 diff changeset	143 handle.setAltInterface(altif.alternateSetting)
381ed6f3d2d7 Save handle after using it, makes the code look nicer. Daniel O'Connor <darius@dons.net.au> parents: 7 diff changeset	144 self.dev = dev
381ed6f3d2d7 Save handle after using it, makes the code look nicer. Daniel O'Connor <darius@dons.net.au> parents: 7 diff changeset	145 self.handle = handle
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	146
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	147 # Get some info for humans
10 154dab1e474f Use short form of handle which looks nicer.. Daniel O'Connor <darius@dons.net.au> parents: 9 diff changeset	148 self.vendname = handle.getString(dev.iManufacturer, 1024)
154dab1e474f Use short form of handle which looks nicer.. Daniel O'Connor <darius@dons.net.au> parents: 9 diff changeset	149 self.prodname = handle.getString(dev.iProduct, 1024)
154dab1e474f Use short form of handle which looks nicer.. Daniel O'Connor <darius@dons.net.au> parents: 9 diff changeset	150 self.serial = handle.getString(dev.iSerialNumber, 1024)
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	151
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	152 # Determine the endpoints for each operation type
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	153 self.intrep = self.bulkinep = self.bulkoutep = None
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	154
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	155 for ep in altif.endpoints:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	156 if ep.type == usb.ENDPOINT_TYPE_INTERRUPT and \
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	157 ep.address & usb.ENDPOINT_IN == usb.ENDPOINT_IN:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	158 self.intrep = ep.address
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	159
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	160 if ep.type == usb.ENDPOINT_TYPE_BULK:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	161 if ep.address & usb.ENDPOINT_IN == usb.ENDPOINT_IN:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	162 self.bulkinep = ep.address
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	163 else:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	164 self.bulkoutep = ep.address
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	165 self.maxPacket = ep.maxPacketSize
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	166
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	167 # Required for 488.2 devices, optional otherwise
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	168 if self.intrep == None:
56 91b476ebc0f2 Run through 2to3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 55 diff changeset	169 print("Can't find interrupt endpoint")
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	170
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	171 # Data from the scope (mandatory)
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	172 if self.bulkinep == None:
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	173 raise BaseException("Can't find bulk-in endpoint")
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	174
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	175 # Data to the scope (mandatory)
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	176 if self.bulkoutep == None:
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	177 raise BaseException("Can't find bulk-out endpoint")
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	178
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	179 self.tag = 1
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	180
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	181 def __str__(self):
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	182 rtn = "Mfg: %s Prod: %s" % (self.vendname, self.prodname)
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	183 if self.serial != "":
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	184 rtn += " S/N: " + self.serial
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	185
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	186 return rtn
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	187
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	188 def incrtag(self):
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	189 self.tag = (self.tag + 1) % 255
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	190 if self.tag == 0:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	191 self.tag += 1
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	192
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	193 def write(self, data):
12 5ff9130cc953 This code isn't scope specific. Daniel O'Connor <darius@dons.net.au> parents: 11 diff changeset	194 """Send data (string) to the instrument"""
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	195
56 91b476ebc0f2 Run through 2to3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 55 diff changeset	196 orddata = list(map(ord, data))
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	197 # The device needs a \n at the end, enfore this
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	198 if orddata[-1] != '\n':
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	199 orddata += [ord('\n')]
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	200 datalen = len(orddata)
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	201
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	202 # Build the packet
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	203 pkt = [ DEV_DEP_MSG_OUT, self.tag, ~self.tag & 0xff, 0x00,
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	204 datalen & 0xff, datalen >> 8 & 0xff, datalen >> 16 & 0xff,
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	205 datalen >> 24 & 0xff, 1, 0, 0, 0 ]
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	206
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	207 # Add the data
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	208 pkt = pkt + orddata
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	209
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	210 # Align to 4 bytes
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	211 alignlen = ((len(pkt) / 4) + 1) * 4
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	212 pkt = pkt + [0] * (alignlen - len(pkt))
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	213
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	214 # Bump the tag
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	215 self.incrtag()
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	216
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	217 # Split it up into maxPacket sized chunks and send..
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	218 while len(pkt) > 0:
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	219 chunk = pkt[0:self.maxPacket]
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	220 pkt = pkt[self.maxPacket:]
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	221
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	222 #print "Sending %s bytes of data: %s" % (len(chunk), chunk)
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	223 wrote = self.handle.bulkWrite(self.bulkoutep, chunk)
a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	224 if wrote != len(chunk):
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	225 raise BaseException("Short write, got %d, expected %d" % (wrote, len(chunk)))
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	226
23 876d951bbcc0 Redo timeout in a more sensible way (also change it to 100ms) Daniel O'Connor <darius@dons.net.au> parents: 12 diff changeset	227 def read(self, timeout = None):
5 51d1fc44a753 Add variable timeout for reads. Daniel O'Connor <darius@dons.net.au> parents: 4 diff changeset	228 """Read data from the device, waits for up to timeout seconds for each USB transaction"""
51d1fc44a753 Add variable timeout for reads. Daniel O'Connor <darius@dons.net.au> parents: 4 diff changeset	229
23 876d951bbcc0 Redo timeout in a more sensible way (also change it to 100ms) Daniel O'Connor <darius@dons.net.au> parents: 12 diff changeset	230 if timeout == None:
876d951bbcc0 Redo timeout in a more sensible way (also change it to 100ms) Daniel O'Connor <darius@dons.net.au> parents: 12 diff changeset	231 timeout = 0.1
876d951bbcc0 Redo timeout in a more sensible way (also change it to 100ms) Daniel O'Connor <darius@dons.net.au> parents: 12 diff changeset	232
5 51d1fc44a753 Add variable timeout for reads. Daniel O'Connor <darius@dons.net.au> parents: 4 diff changeset	233 # Mangle into milliseconds
51d1fc44a753 Add variable timeout for reads. Daniel O'Connor <darius@dons.net.au> parents: 4 diff changeset	234 _timeout = int(timeout * 1000.0)
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	235
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	236 # Maximum we accept at once
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	237 # Was 2^31 - 1 but that seems to make things take too long to
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	238 # read (perhaps libusb tries to malloc it..)
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	239 datalen = 10240
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	240 data = []
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	241
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	242 while True:
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	243 # Ask the device to send us something
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	244 pkt = [ REQUEST_DEV_DEP_MSG_IN, self.tag, ~self.tag & 0xff, 0x00,
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	245 datalen & 0xff, datalen >> 8 & 0xff, datalen >> 16 & 0xff,
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	246 datalen >> 24 & 0xff, 0, 0, 0, 0]
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	247
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	248 # Expected tag
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	249 exptag = self.tag
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	250
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	251 # Bump tag
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	252 self.incrtag()
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	253
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	254 # Send it
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	255 #print "Sending " + str(pkt)
5 51d1fc44a753 Add variable timeout for reads. Daniel O'Connor <darius@dons.net.au> parents: 4 diff changeset	256 wrote = self.handle.bulkWrite(self.bulkoutep, pkt, _timeout)
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	257 if wrote != len(pkt):
56 91b476ebc0f2 Run through 2to3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 55 diff changeset	258 print("Short write, got %d, expected %d" % (wrote, len(pkt)))
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	259
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	260 #print "Reading.."
5 51d1fc44a753 Add variable timeout for reads. Daniel O'Connor <darius@dons.net.au> parents: 4 diff changeset	261 read = self.handle.bulkRead(self.bulkinep, datalen, _timeout)
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	262 #print "Read %s bytes: %s" % (len(read), str(read))
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	263
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	264 if read[0] != DEV_DEP_MSG_IN:
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	265 raise BaseException("Unexpected Msg ID, got %s expected %d" % (read[0], DEV_DEP_MSG_IN))
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	266 if read[1] != exptag:
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	267 raise BaseException("Unexpected tag, got %d expected %d" % (read[1], exptag))
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	268 if read[2] != ~exptag & 0xff:
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	269 raise BaseException("Unexpected tag inverse, got %d expected %d" % (read[1], ~exptag & 0xff))
0 a43a47dfc902 First stab at code that actually works! Daniel O'Connor <darius@dons.net.au> parents: diff changeset	270
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	271 actualdata = read[4] \| read[5] << 8 \| read[6] << 16 \| read[7] << 24
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	272 #print "Computed datalen is %d" % (actualdata)
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	273 data += read[12:12 + actualdata]
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	274 if read[8] & 0x01:
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	275 #print "Breaking out due to EOM"
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	276 break
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	277
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	278 # Stringify result for easier consumption
56 91b476ebc0f2 Run through 2to3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 55 diff changeset	279 result = reduce(lambda x, y: x+y, list(map(chr, data)))
1 e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	280 # Trim off \n if present
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	281 if result[-1] == '\n':
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	282 result = result[0:-1]
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	283
e2089824735a Make the read support work properly & check what the device gives us. Daniel O'Connor <darius@dons.net.au> parents: 0 diff changeset	284 return result
55 ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	285
ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	286 def ask(self, s, timeout = None):
ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	287 self.write(s)
ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	288 return self.read(timeout = None)
ad5942d22f78 Use BaseException rather than strings. Daniel O'Connor <doconnor@gsoft.com.au> parents: 23 diff changeset	289
11 f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	290 def isConnected(self):
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	291 """Check if the device is present"""
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	292
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	293 # libusb makes it very hard (at least on FreeBSD) to determine if we're still connected.
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	294 # This is a reasonable proxy..
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	295 try:
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	296 self.handle.getString(self.dev.iManufacturer, 100)
56 91b476ebc0f2 Run through 2to3 Daniel O'Connor <doconnor@gsoft.com.au> parents: 55 diff changeset	297 except USBError as e:
11 f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	298 return False
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	299
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	300 return True
f588f5bc834a Add a method to determine if the device is still connected. Daniel O'Connor <darius@dons.net.au> parents: 10 diff changeset	301

Mercurial > ~darius > hgwebdir.cgi > pyinst

annotate usb488.py @ 56:91b476ebc0f2