def main():
try:
#Initialization of driver
meDriver.meOpen(meDriver.ME_OPEN_NO_FLAGS)
#Get library version
LibVer = meDriver.meQueryVersionLibrary()
LibVer_Special = LibVer / 0x1000000
LibVer_API = LibVer / 0x10000
LibVer_Relase = LibVer / 0x100
LibVer_Compilation = LibVer
print "Library version is %02x.%02x.%02x.%02x" % (LibVer_Special%0xFF, LibVer_API&0xFF, LibVer_Relase&0xFF, LibVer_Compilation&0xFF)
#Get main driver version
DrvVer = meDriver.meQueryVersionMainDriver()
DrvVer_Special = DrvVer / 0x1000000
DrvVer_API = DrvVer / 0x10000
DrvVer_Relase = DrvVer / 0x100
DrvVer_Compilation = DrvVer
print "Main driver version is %02x.%02x.%02x.%02x" % (DrvVer_Special&0xFF, DrvVer_API&0xFF, DrvVer_Relase&0xFF, DrvVer_Compilation&0xFF)
#Get number of registered devices
meNumberDevices = meDriver.meQueryNumberDevices()
print "%i devices in system" % (meNumberDevices)
print
for meNoDevices in range(meNumberDevices):
meNumberSubdevices = meDriver.meQueryNumberSubdevices(meNoDevices)
try:
meNoSubdevices = 0
while meNoSubdevices<meNumberSubdevices:
#Get all analog input sub-devices
meNoSubdevices = meDriver.meQuerySubdeviceByType(meNoDevices, meNoSubdevices, meDriver.ME_TYPE_AI, meDriver.ME_SUBTYPE_ANY)
try:
meNumberChannels = meDriver.meQueryNumberChannels(meNoDevices, meNoSubdevices)
except meDriver.error:
meNumberChannels = 0
for meNoChannels in range(meNumberChannels):
#Do test for each channel
GetAI(meNoDevices, meNoSubdevices, meNoChannels)
meDriver.meIOResetSubdevice(meNoDevices, meNoSubdevices, meDriver.ME_VALUE_NOT_USED)
meNoSubdevices = meNoSubdevices + 1
except meDriver.error:
pass
except meDriver.error, Val:
print sys.exc_info()
print Val
def GetStreamAI(NoDev, NoSubDev):
DataBlockSize = 0x10000
DataReadSize = 0x1000
AIBufSize = 0x400
#Preaparing trigger list
TrigList = {'AcqStartTrigType' : meDriver.ME_TRIG_TYPE_SW,
'AcqStartTrigEdge' : meDriver.ME_TRIG_EDGE_NONE,
'AcqStartTrigChan' : meDriver.ME_TRIG_CHAN_DEFAULT,
'AcqStartTicks' : long(66),
'ScanStartTrigType' : meDriver.ME_TRIG_TYPE_TIMER,
'ScanStartTicks' : long(66),
'ConvStartTrigType' : meDriver.ME_TRIG_TYPE_TIMER,
'ConvStartTicks' : long(33000), #1kHz
'ScanStopTrigType' : meDriver.ME_TRIG_TYPE_NONE,
'ScanStopCount' : 0,
'AcqStopTrigType' : meDriver.ME_TRIG_TYPE_COUNT,
'AcqStopCount' : DataBlockSize,
'Flags' : meDriver.ME_IO_STREAM_TRIGGER_TYPE_NO_FLAGS}
#Preaparing config list
ConfList = []
ConfEntry = {'Channel': 0,
'StreamConfig': 0,
'Ref': meDriver.ME_REF_AI_GROUND,
'Flags': meDriver.ME_IO_STREAM_CONFIG_TYPE_NO_FLAGS}
ConfList.append(ConfEntry)
#Preaparing start list
StartList = []
StartEntry = {'Device': NoDev,
'Subdevice': NoSubDev,
'StartMode': meDriver.ME_START_MODE_BLOCKING, #This is returning when stream STARTS!
'TimeOut': 0,
'Flags': meDriver.ME_IO_STREAM_START_TYPE_NO_FLAGS,
'Errno': 0}
StartList.append(StartEntry)
#Preaparing stop list
StopList = []
StopEntry = {'Device': NoDev,
'Subdevice': NoSubDev,
'StopMode': meDriver.ME_STOP_MODE_IMMEDIATE,
'Flags': meDriver.ME_IO_STREAM_STOP_TYPE_NO_FLAGS,
'Errno': 0}
StopList.append(StopEntry)
#Using range 0
(iUnit, dMin, dMax, iMaxData) = meDriver.meQueryRangeInfo(NoDev, NoSubDev, 0)
meDriver.meIOResetSubdevice(NoDev, NoSubDev, meDriver.ME_VALUE_NOT_USED)
#Configure
print "Configure AI"
meDriver.meIOStreamConfig(NoDev, NoSubDev, ConfList, TrigList, AIBufSize, meDriver.ME_IO_STREAM_CONFIG_NO_FLAGS)
print "Start AI"
meDriver.meIOStreamStart(StartList, meDriver.ME_IO_STREAM_START_NO_FLAGS)
print "Work"
totalCount = 0
while (totalCount<DataBlockSize):
#Read data (blocking mode)
AIBufferCount=AIBufSize
AIBuffer = meDriver.meIOStreamRead(NoDev, NoSubDev, meDriver.ME_READ_MODE_BLOCKING, AIBufferCount, meDriver.ME_IO_STREAM_READ_NO_FLAGS)
#Show some samples
print "\tSample 0x%x => %f" % (totalCount, meDriver.meUtilityDigitalToPhysical( dMin, dMax, iMaxData, AIBuffer[0], meDriver.ME_MODULE_TYPE_MULTISIG_NONE, 0))
totalCount = totalCount + len(AIBuffer)
print "Stop AI"
meDriver.meIOStreamStop(StopList, meDriver.ME_IO_STREAM_STOP_NO_FLAGS)
print "AI stopped."
