1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
"""
Provide basic class to operate scope
Created by Eugeniy E. Mikhailov 2021/11/29
"""
from qolab.hardware.scpi import SCPIinstr
from qolab.hardware.basic import BasicInstrument
from qolab.data.trace import TraceSetSameX
import yaml
class Scope(BasicInstrument):
# Minimal set of methods to be implemented by a scope.
def __init__(self, *args, **kwds):
BasicInstrument.__init__(self, *args, **kwds)
self.config['Device type']='Scope'
self.config['Device model'] = 'Generic Scope Without Hardware interface'
self.config['FnamePrefix'] = 'scope'
self.numberOfChannels = 0
# deviceProperties must have 'get' and preferably 'set' methods available,
# i.e. 'SampleRate' needs getSampleRate() and love to have setSampleRate(value)
# they will be used to obtain config and set device according to it
self.deviceProperties = {'SampleRate', 'TimePerDiv', 'TrigDelay', 'TriggerMode', 'Roll', 'Run' };
# same is applied to channelProperties but we need setter/getter with channel number
# i.e. VoltsPerDiv -> getChanVoltsPerDiv(chNum) and setSampleRate(chNum, value)
self.channelProperties = {'VoltsPerDiv', 'VoltageOffset', }
def getTrace(self, chNum, availableNpnts=None, maxRequiredPoints=None, decimate=True):
# Should work with minimal arguments list
# but might be faster if parameters provided: less IO requests
# old_trg_mode = self.getTriggerMode()
# self.setTriggerMode('STOP'); # to get synchronous channels
raise NotImplementedError( 'getTrace function is not implemented' )
# if old_trg_mode != "STOP":
# short speed up here with this check
# self.setTriggerMode(old_trg_mode)
def getTriggerMode(self):
# we expect NORM, AUTO, SINGLE, STOP
raise NotImplementedError( 'getTriggerMode function is not implemented' )
def setTriggerMode(self, mode):
# we expect NORM, AUTO, SINGLE, STOP
raise NotImplementedError( 'setTriggerMode function is not implemented' )
def getAllTraces(self, availableNpnts=None, maxRequiredPoints=None, decimate=True):
allTraces=TraceSetSameX('scope traces')
allTraces.config['tags']['DAQ']=self.getConfig()
old_trg_mode = self.getTriggerMode()
self.setTriggerMode('STOP'); # to get synchronous channels
for chNum in range(1, self.numberOfChannels+1):
allTraces.addTrace( self.getTrace(chNum, availableNpnts=availableNpnts, maxRequiredPoints=maxRequiredPoints, decimate=decimate) )
# restore scope to the before acquisition mode
if old_trg_mode != "STOP":
# short speed up here with this check
self.setTriggerMode(old_trg_mode)
return( allTraces )
def plot(self, **kwargs):
allTraces=self.getAllTraces(**kwargs)
allTraces.plot()
def getConfig(self):
config = BasicInstrument.getConfig(self).copy()
chconfig = {}
for chNum in range(1, self.numberOfChannels+1):
chNconfig = {}
for p in self.channelProperties:
getter = f'getChan{p}'
if not hasattr(self, getter):
print(f'warning no getter for {p}, i.e. {getter} is missing')
continue
res = getattr(self, getter)(chNum)
chNconfig[p] = res
chconfig[chNum] = chNconfig
config['ChannelsConfig']=chconfig
return config
def save(self, fname=None, item_format='e', availableNpnts=None, maxRequiredPoints=None, decimate=True, extention='dat'):
allTraces = self.getAllTraces(availableNpnts=availableNpnts, maxRequiredPoints=maxRequiredPoints, decimate=decimate)
allTraces.config['item_format']=item_format
if fname is None:
fname = self.getNextDataFile(extention=extention)
allTraces.save(fname, item_format=item_format)
return(fname)
class ScopeSCPI(SCPIinstr, Scope):
"""
Do not instantiate directly, use
rm = pyvisa.ResourceManager()
ScopeSCPI(rm.open_resource('TCPIP::192.168.0.2::INSTR'))
"""
def __init__(self, resource, *args, **kwds):
SCPIinstr.__init__(self, resource)
Scope.__init__(self, *args, **kwds)
self.config['DeviceId'] = str.strip(self.idn)
from .sds1104x import SDS1104X
|
