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#!/usr/bin/env python
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#-*- coding: utf-8 -*-
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"""Simple python library to drive the analog discovery module from www.digilentinc.com
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"""
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from ctypes import *
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import time
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import sys
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import os
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import matplotlib.pyplot as plt
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import numpy as np
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__author__ = "Alexis Jeandet"
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__copyright__ = "Copyright 2015, Laboratory of Plasma Physics"
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__credits__ = []
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__license__ = "GPLv2"
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__version__ = "1.0.0"
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__maintainer__ = "Alexis Jeandet"
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__email__ = "alexis.jeandet@member.fsf.org"
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__status__ = "Production"
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nodev = c_int(0)
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DwfStateReady = c_byte(0)
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DwfStateConfig = c_byte(4)
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DwfStatePrefill = c_byte(5)
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DwfStateArmed = c_byte(1)
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DwfStateWait = c_byte(7)
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DwfStateTriggered = c_byte(3)
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DwfStateRunning = c_byte(3)
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DwfStateDone = c_byte(2)
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DwfStateDict={
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DwfStateReady.value:"Ready",
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DwfStateConfig.value:"Config",
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DwfStatePrefill.value:"Prefill",
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DwfStateArmed.value:"Armed",
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DwfStateWait.value:"Wait",
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DwfStateTriggered.value:"Triggered",
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DwfStateRunning.value:"Running",
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DwfStateDone.value:"Done"
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}
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DECIAnalogInChannelCount = c_int(1)
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DECIAnalogOutChannelCount = c_int(2)
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DECIAnalogIOChannelCount = c_int(3)
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DECIDigitalInChannelCount = c_int(4)
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DECIDigitalOutChannelCount = c_int(5)
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DECIDigitalIOChannelCount = c_int(6)
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DECIAnalogInBufferSize = c_int(7)
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DECIAnalogOutBufferSize = c_int(8)
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DECIDigitalInBufferSize = c_int(9)
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DECIDigitalOutBufferSize = c_int(10)
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trigsrcNone = c_byte(0)
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trigsrcPC = c_byte(1)
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trigsrcDetectorAnalogIn = c_byte(2)
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trigsrcDetectorDigitalIn = c_byte(3)
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trigsrcAnalogIn = c_byte(4)
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trigsrcDigitalIn = c_byte(5)
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trigsrcDigitalOut = c_byte(6)
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trigsrcAnalogOut1 = c_byte(7)
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trigsrcAnalogOut2 = c_byte(8)
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trigsrcAnalogOut3 = c_byte(9)
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trigsrcAnalogOut4 = c_byte(10)
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trigsrcExternal1 = c_byte(11)
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trigsrcExternal2 = c_byte(12)
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trigsrcExternal3 = c_byte(13)
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trigsrcExternal4 = c_byte(14)
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trigAuto = c_byte(254)
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trigNormal = c_byte(255)
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AnalogOutNodeCarrier = c_int(0)
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AnalogOutNodeFM = c_int(1)
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AnalogOutNodeAM = c_int(2)
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filterDecimate = c_int(0)
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filterAverage = c_int(1)
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filterMinMax = c_int(2)
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shapes = {'DC' : 0,
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'Sine' : 1,
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'Square' : 2,
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'Triangle' : 3,
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'RampUp' : 4,
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'RampDown' : 5,
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'Noise' : 6,
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'Custom' : 30,
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'Play' :31, }
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closed=False
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opened=True
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class DiscoveryLimits(object):
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class limitRange(object):
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def __init__(self,Min,Max,name="Unknow",unit=""):
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self.Min = Min
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self.Max = Max
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self.name = name
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self.unit = unit
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def conform(self,value):
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if value<self.Min:
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raise UserWarning("Parameter "+self.name+" out of bound\nValue="+str(value)+"\nForce to "+str(self.Min))
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return self.Min
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if value>self.Max:
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raise UserWarning("Parameter "+self.name+" out of bound\nValue="+str(value)+"\nForce to "+str(self.Max))
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return self.Max
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return value
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def __str__(self):
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return self.name + ":\n Min="+str(self.Min)+" "+self.unit+",Max="+str(self.Max)+" "+self.unit
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errors = {0: RuntimeError("No card opened"),
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1: UserWarning("Parameter out of bound"),
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}
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def __init__(self,libdwf,hdwf):
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self.limits=[]
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self.ACQ_IN_RANGES=[0.0]
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if hdwf.value == nodev.value:
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return
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self.__hdwf=hdwf
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self.__libdwf=libdwf
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Mind=c_double()
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Maxd=c_double()
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Mini=c_int()
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Maxi=c_int()
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StepsCount=c_int()
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Steps=(c_double*32)()
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self.__libdwf.FDwfAnalogInBufferSizeInfo(self.__hdwf, byref(Mini), byref(Maxi))
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self.ACQ_BUF=self.limitRange(Mini.value,Maxi.value,"ACQ Buffer Size","Sps")
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self.limits.append(self.ACQ_BUF)
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self.__libdwf.FDwfAnalogInFrequencyInfo(self.__hdwf, byref(Mind), byref(Maxd))
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self.ACQ_FREQ=self.limitRange(Mind.value,Maxd.value,"ACQ Frequency","Hz")
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self.limits.append(self.ACQ_FREQ)
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self.__libdwf.FDwfAnalogInChannelRangeSteps(self.__hdwf, byref(Steps), byref(StepsCount))
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self.ACQ_IN_RANGES=Steps[0:StepsCount.value]
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self.__libdwf.FDwfAnalogOutNodeAmplitudeInfo(self.__hdwf,c_int(0), AnalogOutNodeCarrier,
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byref(Mind), byref(Maxd))
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self.GEN_AMPL=self.limitRange(Mind.value,Maxd.value,"GEN Amplitude","V")
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self.limits.append(self.GEN_AMPL)
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self.__libdwf.FDwfAnalogOutNodeFrequencyInfo(self.__hdwf,c_int(0), AnalogOutNodeCarrier,
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byref(Mind), byref(Maxd))
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self.GEN_FREQ=self.limitRange(Mind.value,Maxd.value,"GEN Frequency","Hz")
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self.limits.append(self.GEN_FREQ)
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self.__libdwf.FDwfAnalogOutNodeOffsetInfo(self.__hdwf,c_int(0), AnalogOutNodeCarrier,
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byref(Mind), byref(Maxd))
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self.GEN_OFFSET=self.limitRange(Mind.value,Maxd.value,"GEN Offset","V")
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self.limits.append(self.GEN_OFFSET)
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self.__libdwf.FDwfAnalogOutNodeDataInfo(self.__hdwf,c_int(0), AnalogOutNodeCarrier,
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byref(Mini), byref(Maxi))
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self.GEN_BUFF=self.limitRange(Mini.value,Maxi.value,"GEN Buffer size","Sps")
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self.limits.append(self.GEN_BUFF)
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def __conformParam(self,minVal,maxVal,val):
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if val<minVal:
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raise self.errors.get(1)
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print("Force to "+str(minVal))
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return minVal
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if val>maxVal:
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raise self.errors.get(1)
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print("Force to "+str(maxVal))
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return maxVal
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return val
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def acqFreq(self, value):
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return self.ACQ_FREQ.conform(value)
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def acqBufSize(self, value):
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return self.ACQ_BUF.conform(value)
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def genFreq(self, value):
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return self.GEN_FREQ.conform(value)
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def genAmplitude(self, value):
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return self.GEN_AMPL.conform(value)
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def genOffset(self, value):
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return self.GEN_OFFSET.conform(value)
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def genBuffSize(self, value):
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return self.GEN_BUFF.conform(value)
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def __str__(self):
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res=str()
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for i in self.limits:
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res+=i.__str__()+"\n"
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res+="ACQ Input ranes: "+str(self.ACQ_IN_RANGES)
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return res
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class Discovery(object):
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errors = {0: RuntimeError("No card opened"),
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1: UserWarning("Parameter out of bound"),
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}
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def findDevice(self,device):
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if not self.__opened:
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raise self.errors.get(0)
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nbDevices = c_int()
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self.__libdwf.FDwfEnum(c_int(0), byref(nbDevices))
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SN = create_string_buffer(32)
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for i in range(nbDevices.value):
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self.__libdwf.FDwfEnumSN(c_int(i), SN)
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if SN.value.decode("UTF-8") == device:
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return i
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return -1
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def __init__(self,card=-1):
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if sys.platform.startswith("win"):
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self.__libdwf = cdll.dwf
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elif sys.platform.startswith("darwin"):
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self.__libdwf = cdll.LoadLibrary("libdwf.dylib")
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else:
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self.__libdwf = cdll.LoadLibrary("libdwf.so")
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self.__opened = True
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self.__hdwf = c_int()
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if card != -1:
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SN=card
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card = self.findDevice(card)
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if card == -1:
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raise RuntimeError( "Card not found "+ SN)
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self.__libdwf.FDwfDeviceOpen(c_int(card), byref(self.__hdwf))
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if self.__hdwf.value == nodev.value:
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szerr = create_string_buffer(512)
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self.__libdwf.FDwfGetLastErrorMsg(szerr)
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print(szerr.value)
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print("failed to open device")
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self.__opened=False
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self.__limits=DiscoveryLimits(self.__libdwf,self.__hdwf)
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print(self.__limits)
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@property
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def opened(self):
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return self.__opened
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@property
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def max_sampling_freq(self):
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return self.__limits.ACQ_FREQ.Max
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@property
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def min_sampling_freq(self):
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return self.__limits.ACQ_FREQ.Min
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@property
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def max_sampling_buffer(self):
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return self.__limits.ACQ_BUF.Max
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#############################################################
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# Power Supply
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#############################################################
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def set_power(self,fiveVolt=1,minusFiveVolt=1,master=True):
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if not self.__opened:
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raise self.errors.get(0)
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# enable positive supply
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self.__libdwf.FDwfAnalogIOChannelNodeSet(self.__hdwf, 0, 0, c_double(fiveVolt))
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# enable negative supply
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self.__libdwf.FDwfAnalogIOChannelNodeSet(self.__hdwf, 1, 0, c_double(minusFiveVolt))
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# master enable
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return self.__libdwf.FDwfAnalogIOEnableSet(self.__hdwf, master)
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def get_power(self):
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if not self.__opened:
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raise self.errors.get(0)
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supplyVoltage = c_double()
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supplyCurrent = c_double()
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IsEnabled = c_bool()
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self.__libdwf.FDwfAnalogIOStatus(self.__hdwf)
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self.__libdwf.FDwfAnalogIOChannelNodeStatus(self.__hdwf, c_int(3), c_int(0), byref(supplyVoltage))
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self.__libdwf.FDwfAnalogIOChannelNodeStatus(self.__hdwf, c_int(3), c_int(1), byref(supplyCurrent))
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self.__libdwf.FDwfAnalogIOEnableStatus(self.__hdwf, byref(IsEnabled))
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return [IsEnabled.value,supplyVoltage.value,supplyCurrent.value]
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#############################################################
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# AnalogIn
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#############################################################
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def analog_in_read(self,ch1=True,ch2=True,frequency=100000000,samplesCount=100,ch1range=5.0,ch2range=5.0,trigger=trigsrcNone):
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if not self.__opened:
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raise self.errors.get(0)
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cnt=self.__limits.acqBufSize(samplesCount)
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self.__libdwf.FDwfAnalogInFrequencySet(self.__hdwf, c_double(self.__limits.acqFreq(frequency)))
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f=c_double()
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self.__libdwf.FDwfAnalogInFrequencyGet(self.__hdwf, byref(f))
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frequency=f.value
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self.__libdwf.FDwfAnalogInBufferSizeSet(self.__hdwf, c_int(cnt))
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range,enabled = [ch1range,ch2range],[ch1,ch2]
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for ch in (0,1):
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self.__libdwf.FDwfAnalogInChannelEnableSet(self.__hdwf, c_int(ch), c_bool(enabled[ch]))
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self.__libdwf.FDwfAnalogInChannelRangeSet(self.__hdwf, c_int(ch), c_double(range[ch]))
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self.__libdwf.FDwfAnalogInChannelFilterSet(self.__hdwf,c_int(ch),filterAverage)
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self.set_analog_in_trigger(trigger)
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self.__libdwf.FDwfAnalogInConfigure(self.__hdwf, c_bool(False), c_bool(True))
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status = c_byte()
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while True:
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self.__libdwf.FDwfAnalogInStatus(self.__hdwf, c_int(1), byref(status))
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if status.value == DwfStateDone.value :
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break
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time.sleep(0.1)
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if ch1:
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ch1data = (c_double*cnt)()
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self.__libdwf.FDwfAnalogInStatusData(self.__hdwf, 0, ch1data, cnt)
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if ch2:
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ch2data = (c_double*cnt)()
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self.__libdwf.FDwfAnalogInStatusData(self.__hdwf, 1, ch2data, cnt)
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return [np.array([ch1data,ch2data]),frequency]
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else:
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return [np.array([ch1data]),frequency]
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if ch2:
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ch2data = (c_double*cnt)()
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self.__libdwf.FDwfAnalogInStatusData(self.__hdwf, 1, ch2data, cnt)
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return [np.array([ch2data]),frequency]
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def set_analog_in_trigger(self,trigger=trigAuto,autoTimeout=0.0):
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if not self.__opened:
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raise self.errors.get(0)
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if trigger == trigAuto:
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self.__libdwf.FDwfAnalogInTriggerSourceSet(self.__hdwf,trigsrcDetectorAnalogIn)
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self.__libdwf.FDwfAnalogInTriggerAutoTimeoutSet(self.__hdwf,c_double(autoTimeout))
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return
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if trigger == trigNormal:
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self.__libdwf.FDwfAnalogInTriggerSourceSet(self.__hdwf,trigsrcDetectorAnalogIn)
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self.__libdwf.FDwfAnalogInTriggerAutoTimeoutSet(self.__hdwf,c_double(0.0))
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return
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self.__libdwf.FDwfAnalogInTriggerSourceSet(self.__hdwf,trigger)
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#############################################################
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# AnalogOut
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#############################################################
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def analog_out_enable(self,channel=0):
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self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(True))
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def analog_out_disable(self,channel=0):
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self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(False))
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def analog_out_gen(self,frequency=1000, symmetry=50.0, shape='Sine', channel=0, amplitude=1.0, offset=0.0,phase=0.0, syncOnTrigger=False, triggerFrq=1.0, wait=0.0, runDuration=None):
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self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(False))
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self.__libdwf.FDwfAnalogOutNodeEnableSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_bool(True))
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self.__libdwf.FDwfAnalogOutNodeFunctionSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_int(shapes.get(shape)))
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self.__libdwf.FDwfAnalogOutNodeSymmetrySet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(symmetry))
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if shape!="DC":
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self.__libdwf.FDwfAnalogOutNodeFrequencySet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(self.__limits.genFreq(frequency)))
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self.__libdwf.FDwfAnalogOutNodeAmplitudeSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(self.__limits.genAmplitude(amplitude)))
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self.__libdwf.FDwfAnalogOutNodeOffsetSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(self.__limits.genOffset(offset)))
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self.__libdwf.FDwfAnalogOutNodePhaseSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(phase))
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if syncOnTrigger:
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self.analog_out_set_trigger(channel)
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self.__libdwf.FDwfAnalogOutRepeatSet(self.__hdwf, c_int(channel),c_int(0))
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if runDuration is None:
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runDuration = triggerFrq
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self.__libdwf.FDwfAnalogOutRunSet(self.__hdwf, c_int(channel),c_double(runDuration))
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self.__libdwf.FDwfAnalogOutWaitSet(self.__hdwf, c_int(channel), c_double(wait))
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self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(True))
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def analog_out_gen_arbit(self,samplesBuffer ,repeatingFrequency=100, channel=0, amplitude=1.0, offset=0.0):
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self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(False))
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cnt=self.__limits.genBuffSize(len(samplesBuffer))
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buf=(c_double*cnt)()
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buf[:]=samplesBuffer[0:cnt]
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#repeatingFrequency = self.__limits.genFreq(repeatingFrequency*cnt)/cnt
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self.__libdwf.FDwfAnalogOutNodeEnableSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_bool(True))
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self.__libdwf.FDwfAnalogOutNodeFunctionSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_int(shapes.get("Custom")))
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self.__libdwf.FDwfAnalogOutNodeFrequencySet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(repeatingFrequency))
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self.__libdwf.FDwfAnalogOutNodeAmplitudeSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(self.__limits.genAmplitude(amplitude)))
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self.__libdwf.FDwfAnalogOutNodeOffsetSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(self.__limits.genOffset(offset)))
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self.__libdwf.FDwfAnalogOutNodeDataSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, buf, c_int(cnt))
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self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(True))
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def analog_out_set_trigger(self, channel=0, trigSrc=trigsrcExternal1, trigRepeat=True):
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self.__libdwf.FDwfAnalogOutTriggerSourceSet(self.__hdwf, c_int(channel), trigSrc)
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self.__libdwf.FDwfAnalogOutRepeatTriggerSet(self.__hdwf, c_int(channel), c_bool(trigRepeat))
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def __del__(self):
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if self.__opened:
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self.__libdwf.FDwfDeviceClose(self.__hdwf)
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def analog_out_status(self, channel=0):
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status = c_byte(DwfStateDone.value)
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self.__libdwf.FDwfAnalogOutStatus(self.__hdwf, c_int(channel), byref(status))
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return status
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# def analog_out_modulation(self, channel=0,
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# carrier_frequency=10, carrier_shape='Sine', carrier_amplitude=1.0, carrier_offset=0.0, carrier_phase=0.0, carrier_symmetry=0.5,
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# AM_frequency=0.2857, AM_shape='Square', AM_amplitude=100.0, AM_offset=0.0, AM_phase=0.0, AM_percentageSymmetry=0.2857,
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# syncOnTrigger=trigsrcExternal1, triggerFrq=1.0, wait=0.0, runDuration=None):
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# self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(False))
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# self.__libdwf.FDwfAnalogOutNodeEnableSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_bool(True))
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|
#
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# self.__libdwf.FDwfAnalogOutNodeFunctionSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_int(shapes.get(carrier_shape)))
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|
# self.__libdwf.FDwfAnalogOutNodeFrequencySet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(self.__limits.genFreq(carrier_frequency)))
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# self.__libdwf.FDwfAnalogOutNodeAmplitudeSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(self.__limits.genAmplitude(carrier_amplitude)))
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|
# self.__libdwf.FDwfAnalogOutNodeOffsetSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(self.__limits.genOffset(carrier_offset)))
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|
# self.__libdwf.FDwfAnalogOutNodePhaseSet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(carrier_phase))
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|
# self.__libdwf.FDwfAnalogOutNodeSymmetrySet(self.__hdwf, c_int(channel), AnalogOutNodeCarrier, c_double(carrier_percentageSymmetry))
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|
|
#
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|
# self.__libdwf.FDwfAnalogOutNodeEnableSet(self.__hdwf, c_int(channel), AnalogOutNodeAM, c_bool(True))
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|
# self.__libdwf.FDwfAnalogOutNodeFunctionSet(self.__hdwf, c_int(channel), AnalogOutNodeAM, c_int(shapes.get(AM_shape)))
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|
# self.__libdwf.FDwfAnalogOutNodeFrequencySet(self.__hdwf, c_int(channel), AnalogOutNodeAM, c_double(self.__limits.genFreqAM_frequency)))
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|
# self.__libdwf.FDwfAnalogOutNodeAmplitudeSet(self.__hdwf, c_int(channel), AnalogOutNodeAM, c_double(self.__limits.genAmplitude(AM_amplitude)))
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|
# self.__libdwf.FDwfAnalogOutNodeOffsetSet(self.__hdwf, c_int(channel), AnalogOutNodeAM, c_double(self.__limits.genOffset(AM_offset)))
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|
# self.__libdwf.FDwfAnalogOutNodePhaseSet(self.__hdwf, c_int(channel), AnalogOutNodeAM, c_double(AM_phase))
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|
|
# self.__libdwf.FDwfAnalogOutNodeSymmetrySet(self.__hdwf, c_int(channel), AnalogOutNodeAM, c_double(AM_percentageSymmetry))
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|
|
#
|
|
|
# if syncOnTrigger:
|
|
|
# self.analog_out_set_trigger(channel)
|
|
|
# self.__libdwf.FDwfAnalogOutRepeatSet(self.__hdwf, c_int(channel),c_int(0))
|
|
|
# if runDuration is None:
|
|
|
# runDuration = triggerFrq
|
|
|
# self.__libdwf.FDwfAnalogOutRunSet(self.__hdwf, c_int(channel),c_double(runDuration))
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|
|
# self.__libdwf.FDwfAnalogOutWaitSet(self.__hdwf, c_int(channel), c_double(wait))
|
|
|
# self.__libdwf.FDwfAnalogOutConfigure(self.__hdwf, c_int(channel), c_bool(True))
|
|
|
|
|
|
def digital_io_output_enable(self, value):
|
|
|
self.__libdwf.FDwfDigitalIOOutputEnableSet(self.__hdwf, c_int(value))
|
|
|
|
|
|
def digital_io_get(self):
|
|
|
dwRead = c_uint32()
|
|
|
self.__libdwf.FDwfDigitalIOStatus (self.__hdwf)
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|
|
self.__libdwf.FDwfDigitalIOInputStatus(self.__hdwf, byref(dwRead))
|
|
|
return dwRead.value
|
|
|
|
|
|
def digital_io_set(self,value):
|
|
|
self.__libdwf.FDwfDigitalIOOutputSet(self.__hdwf, c_int(value))
|
|
|
|
|
|
@property
|
|
|
def digital_io(self):
|
|
|
return self.digital_io_get()
|
|
|
|
|
|
@digital_io.setter
|
|
|
def digital_io(self,value):
|
|
|
self.digital_io_set(value)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
print("open first dev")
|
|
|
test = Discovery()
|
|
|
test.set_power()
|
|
|
for i in range(2):
|
|
|
time.sleep(0.2)
|
|
|
print(test.get_power())
|
|
|
test.analog_out_gen()
|
|
|
res=test.analog_in_read(frequency=1000000,samplesCount=1000)
|
|
|
print(res)
|
|
|
plt.plot(range(len(res[0][0])),res[0][0])
|
|
|
plt.plot(range(len(res[0][0])),res[0][1])
|
|
|
plt.show()
|
|
|
test.temp()
|
|
|
# del test
|
|
|
quit()
|
|
|
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|
