def Device_Enumeration():
#print DWF version
version = dwf.GetVersion()
print "DWF Version: " + version
#enumerate and print device information
cdevices = dwf.Enum(0)
print "Number of Devices: " + str(cdevices)
for i in range(0, cdevices):
devicename = dwf.EnumDeviceName(i)
serialnum = dwf.EnumSN(i)
print "------------------------------"
print "Device %d :" % (i)
print "\t" + devicename
print "\t" + serialnum
IsInUse = dwf.EnumDeviceIsOpened(i)
if not IsInUse:
hdwf = dwf.DeviceOpen(i)
channel = dwf.AnalogInChannelCount(hdwf)
hzfreq = dwf.AnalogInFrequencyInfo(hdwf)
print "\tAnalog input channels: " + str(channel)
print "\tMax freq: " + str(hzfreq)
dwf.DeviceClose(hdwf)
hdwf = -1
# ensure all devices are closed
dwf.DeviceCloseAll()
def DigitalOut_BinarayCounter():
#print DWF version
version = dwf.GetVersion()
print "DWF Version: " + version
#open device
print "Opening first device"
hdwf = dwf.DeviceOpen(-1)
if hdwf == dwf.hdwfNone:
print "failed to open device"
else:
print "Preparing to read sample..."
hzSys = dwf.DigitalOutInternalClockInfo(hdwf)
print " internal frequency is %.3f Hz" % (hzSys)
# generate counter
for i in range(0, 15):
dwf.DigitalOutEnableSet(hdwf, i, 1)
# increase by 2 the period of successive bits
dwf.DigitalOutDividerSet(hdwf, i, 1 << i)
# 100kHz counter rate, SystemFrequency/100kHz
cntFreq = hzSys / 1e5
cntFreqres = int(math.floor(cntFreq))
print " counter frequency is %.3f Hz " % (cntFreqres)
dwf.DigitalOutCounterSet(hdwf, i, cntFreqres, cntFreqres)
dwf.DigitalOutConfigure(hdwf, 1)
time.sleep(10)
dwf.DeviceCloseAll()
def DigitalIO():
#print DWF version
version = dwf.GetVersion()
print "DWF Version: "+version
#open device
print "Opening first device"
hdwf =dwf.DeviceOpen(-1)
if hdwf == dwf.hdwfNone:
print "failed to open device"
else:
print "Preparing to read Digital IO pins..."
# enable output/mask on 8 LSB IO pins, from DIO 0 to 7
dwf.DigitalIOOutputEnableSet(hdwf, 0x00FF)
# set value on enabled IO pins
dwf.DigitalIOOutputSet(hdwf, 0x12)
# fetch digital IO information from the device
dwf.DigitalIOStatus (hdwf)
# read state of all pins, regardless of output enable
dwRead = dwf.DigitalIOInputStatus(hdwf)
#print dwRead as bitfield (32 digits, removing 0b at the front)
print "Digital IO Pins: " + bin(dwRead)[2:].zfill(32)
dwf.DeviceCloseAll()
def AnalogIO_AnalogDiscovery_SystemMonitor():
#print DWF version
version = dwf.GetVersion()
print "DWF Version: %s" % (version)
#open device
print "Opening first device"
hdwf = dwf.DeviceOpen(-1)
if hdwf == dwf.hdwfNone:
print "failed to open device"
return
else:
print "Preparing to monitor Voltage, Current, Temp..."
#monitor voltage, current, temperature
#60 times, once per second
for i in range(1, 60):
# wait between readings; the update rate is approximately 1Hz
time.sleep(1)
# fetch analog IO status from device
dwf.AnalogIOStatus(hdwf)
# get system monitor readings
deviceVoltage = dwf.AnalogIOChannelNodeStatus(hdwf, 2, 0)
deviceCurrent = dwf.AnalogIOChannelNodeStatus(hdwf, 2, 1)
deviceTemperature = dwf.AnalogIOChannelNodeStatus(hdwf, 2, 2)
print "Device USB supply voltage: %5g V" % (deviceVoltage)
print "Device USB supply current: %5g A" % (deviceCurrent)
print "Device temperature: %.2f C" % (deviceTemperature)
#close the device
dwf.DeviceCloseAll()
def AnalogOut_Custom():
#Generate Sawtooth
rgdSamples = np.zeros(4000, dtype=np.double)
for i in xrange(rgdSamples.shape[0]):
val =((i%100)-50)/100.0
rgdSamples[i] = val
channel = 0
#print DWF version
version = dwf.GetVersion()
print "DWF Version: "+version
#open device
"Opening first device..."
hdwf =dwf.DeviceOpen(-1)
if hdwf == dwf.hdwfNone:
print "failed to open device"
else:
print "Generating custom waveform..."
dwf.AnalogOutNodeEnableSet(hdwf, channel, dwf.AnalogOutNodeCarrier, True)
dwf.AnalogOutNodeFunctionSet(hdwf, channel, dwf.AnalogOutNodeCarrier, dwf.funcCustom)
dwf.AnalogOutNodeDataSet(hdwf, channel, dwf.AnalogOutNodeCarrier, rgdSamples)
dwf.AnalogOutNodeFrequencySet(hdwf, channel, dwf.AnalogOutNodeCarrier, 10000.0)
dwf.AnalogOutNodeAmplitudeSet(hdwf, channel, dwf.AnalogOutNodeCarrier, 2)
dwf.AnalogOutConfigure(hdwf, channel, True)
print "Playing waveform for 10 seconds..."
time.sleep(10)
print "done."
dwf.DeviceCloseAll()
def DigitalIn_Acquisition():
#print DWF version
version = dwf.GetVersion()
print "DWF Version: " + version
#open device
print "Opening first device"
hdwf = dwf.DeviceOpen(-1)
if hdwf == dwf.hdwfNone:
print "failed to open device"
else:
print "Preparing to read sample..."
# generate on DIO-0 1Mhz pulse (100MHz/25/(3+1)), 25% duty (3low 1high)
#dwf.DigitalOutEnableSet(hdwf, c_int(i), 1)
#dwf.DigitalOutDividerSet(hdwf, c_int(i), 25)
#dwf.DigitalOutCounterSet(hdwf, c_int(i), 3, 1)
# generate counter
for i in range(0, 15):
dwf.DigitalOutEnableSet(hdwf, i, 1)
dwf.DigitalOutDividerSet(hdwf, i, (1 << i))
dwf.DigitalOutCounterSet(hdwf, i, 1, 1)
dwf.DigitalOutConfigure(hdwf, 1)
#sample rate = system frequency / divider, 100MHz/1
dwf.DigitalInDividerSet(hdwf, 1)
# 16bit per sample format
dwf.DigitalInSampleFormatSet(hdwf, 16)
# set number of sample to acquire
cSamples = 1000
rgwSamples = np.zeros(cSamples, dtype=np.uint16)
dwf.DigitalInBufferSizeSet(hdwf, cSamples)
# begin acquisition
dwf.DigitalInConfigure(hdwf, False, True)
print " waiting to finish"
while True:
sts = dwf.DigitalInStatus(hdwf, 1)
print "STS VAL: " + str(sts)
if sts == dwf.stsDone:
break
time.sleep(1)
print "Acquisition finished"
# get samples, byte size
dwf.DigitalInStatusData(hdwf, rgwSamples)
dwf.DeviceCloseAll()
plt.plot(rgwSamples)
plt.show()
def AnalogOutIn():
version = dwf.GetVersion()
print "Version: " + version
cdevices = dwf.Enum(0)
print "Number of Devices: " + str(cdevices)
print "Opening first device"
hdev = dwf.DeviceOpen(0)
print "Configure and start first analog out channel"
dwf.AnalogOutEnableSet(hdev, 0, 1)
print "1 = Sine wave"
dwf.AnalogOutFunctionSet(hdev, 0, 1)
dwf.AnalogOutFrequencySet(hdev, 0, 3000)
print ""
dwf.AnalogOutConfigure(hdev, 0, 1)
print "Configure analog in"
dwf.AnalogInFrequencySet(hdev, 1000000)
print "Set range for all channels"
dwf.AnalogInChannelRangeSet(hdev, -1, 4)
anInBufSize = 4000
dwf.AnalogInBufferSizeSet(hdev, anInBufSize)
print "Wait after first device opening the analog in offset to stabilize"
time.sleep(2)
print "Starting acquisition"
dwf.AnalogInConfigure(hdev, 1, 1)
print " waiting to finish"
while True:
sts = dwf.AnalogInStatus(hdev, 1)
if sts == dwf.DwfStateDone:
break
time.sleep(0.1)
print " done"
print " reading data"
rg = np.zeros(anInBufSize, dtype=np.double)
dwf.AnalogInStatusData(hdev, 0, rg)
dwf.DeviceCloseAll()
dc = np.mean(rg)
print "DC: " + str(dc) + "V"
plt.plot(rg)
plt.show()
def AnalogIO_AnalogDiscovery_Power():
#print DWF version
version = dwf.GetVersion()
print "DWF Version: " + version
#open device
print "Opening first device"
hdwf = dwf.DeviceOpen(-1)
if hdwf == dwf.hdwfNone:
print "failed to open device"
else:
print "Preparing to read sample..."
#set up analog IO channel node
dwf.AnalogIOChannelNodeSet(hdwf, 0, 0, 1)
# enable negative supply
dwf.AnalogIOChannelNodeSet(hdwf, 1, 0, 1)
# master enable
dwf.AnalogIOEnableSet(hdwf, True)
for i in range(1, 60):
#wait 1 second between readings
time.sleep(1)
#fetch analogIO status from device
sts = dwf.AnalogIOStatus(hdwf)
#supply monitor
supplyVoltage = dwf.AnalogIOChannelNodeStatus(hdwf, 3, 0)
supplyCurrent = dwf.AnalogIOChannelNodeStatus(hdwf, 3, 1)
supplyPower = supplyVoltage * supplyCurrent
print "Total supply power: " + str(supplyPower) + "W"
supplyLoadPercentage = 100 * (supplyCurrent / 0.2)
print "Load: " + str(supplyLoadPercentage) + "%"
# in case of overcurrent condition the supplies are disabled
IsEnabled = dwf.AnalogIOEnableStatus(hdwf)
if not IsEnabled:
#re-enable supplies
dwf.AnalogIOEnableSet(hdwf, False)
dwf.AnalogIOEnableSet(hdwf, True)
#close the device
dwf.DeviceCloseAll()
def AnalogIn_Acquisition():
#print DWF version
version = dwf.GetVersion()
print "DWF Version: %s" % (version)
#open device
print "Opening first device"
hdwf = dwf.DeviceOpen(-1)
if hdwf == dwf.hdwfNone:
print "failed to open device"
else:
print "Preparing to read sample..."
#set up acquisition
dwf.AnalogInFrequencySet(hdwf, 20000000.0)
dwf.AnalogInBufferSizeSet(hdwf, 4000)
dwf.AnalogInChannelEnableSet(hdwf, 0, True)
dwf.AnalogInChannelRangeSet(hdwf, 0, 5)
#wait at least 2 seconds for the offset to stabilize
time.sleep(2)
#begin acquisition
dwf.AnalogInConfigure(hdwf, False, True)
print " waiting to finish"
while True:
sts = dwf.AnalogInStatus(hdwf, 1)
print "STS VAL: %s STS DONE: %s" %( sts, dwf.DwfStateDone)
if sts == dwf.DwfStateDone :
break
time.sleep(0.1)
print "Acquisition finished"
rgdSamples = np.zeros(4000, dtype=np.double)
dwf.AnalogInStatusData(hdwf, 0, rgdSamples)
dwf.DeviceCloseAll()
#plot window
dc = np.mean(rgdSamples)
print "DC: %f V" % (dc)
plt.plot(rgdSamples)
plt.show()
def AnalogIn_Trigger(hdwf):
rgdSamples = np.zeros(4000, dtype=np.double)
#set up acquisition
dwf.AnalogInFrequencySet(hdwf, 20000000.0)
dwf.AnalogInBufferSizeSet(hdwf, 8192)
dwf.AnalogInChannelEnableSet(hdwf, 0, True)
dwf.AnalogInChannelRangeSet(hdwf, 0, 5)
#set up trigger
dwf.AnalogInTriggerAutoTimeoutSet(hdwf, 0) #disable auto trigger
dwf.AnalogInTriggerSourceSet(
hdwf, dwf.trigsrcDetectorAnalogIn) #one of the analog in channels
dwf.AnalogInTriggerTypeSet(hdwf, dwf.trigtypeEdge)
dwf.AnalogInTriggerChannelSet(hdwf, 0) # first channel
dwf.AnalogInTriggerLevelSet(hdwf, 1.5) # 1.5V
dwf.AnalogInTriggerConditionSet(hdwf, dwf.trigcondRisingPositive)
#wait at least 2 seconds for the offset to stabilize
time.sleep(2)
print " starting repeated acquisitons"
for iTrigger in range(1, 100):
#begin acquisition
dwf.AnalogInConfigure(hdwf, False, True)
while True:
sts = dwf.AnalogInStatus(hdwf, 1)
if sts == dwf.DwfStateDone:
break
time.sleep(0.001)
dwf.AnalogInStatusData(hdwf, 0, rgdSamples)
dc = np.mean(rgdSamples)
print "Acquisition #%3d average: %g V" % (iTrigger, dc)
dwf.DeviceCloseAll()
def AnalogIn_Sample():
#print DWF version
version = dwf.GetVersion()
print "DWF Version: %s" % (version)
#open device
"Opening first device..."
hdwf = dwf.DeviceOpen(-1)
if hdwf == dwf.hdwfNone:
print "failed to open device"
else:
print "Preparing to read sample..."
dwf.AnalogInChannelEnableSet(hdwf, 0, True)
dwf.AnalogInChannelOffsetSet(hdwf, 0, 0)
dwf.AnalogInChannelRangeSet(hdwf, 0, 5)
dwf.AnalogInConfigure(hdwf, False, False)
time.sleep(2)
sts = dwf.AnalogInStatus(hdwf, False)
voltage = dwf.AnalogInStatusSample(hdwf, 0)
print "Voltage: %f V" % (voltage)
dwf.DeviceCloseAll()