ValueError: Procedure probably called with not enough arguments (8 bytes missing)
Hello! I am chasing around a problem that I am having with ctypes and
I am hoping someone can help out. Here is the Python code:
def asynch(self, baudrate, data, idNum=None, demo=0, portB=0,
enableTE=0, enableTO=0, enableDel=0, numWrite=0, numRead=0):
"""
Name: U12.asynchConfig(fullA, fullB, fullC, halfA, halfB,
halfC, idNum=None, demo=None, timeoutMult=1, configA=0, configB=0,
configTE=0)
Args: See section 4.12 of the User's Guide
Desc: Requires firmware V1.1 or higher. This function writes
to the asynch registers and sets the direction of the D lines (input/
output) as needed.
>>> dev = U12()
>>> dev.asynchConfig(96,1,1,22,2,1)
>>> {'idNum': 1}
"""
#Check id number
if idNum is None:
idNum = self.id
idNum = ctypes.c_long(idNum)
# Check size of data
if len(data) > 18: raise ValueError("data can not be larger
than 18 elements")
# Make data 18 elements large
dataArray = [0] * 18
for i in range(0, len(data)):
dataArray[i] = data[i]
print dataArray
dataArray = listToCArray(dataArray, ctypes.c_long)
ecode = staticLib.AsynchConfig(ctypes.byref(idNum), demo,
portB, enableTE, enableTO, enableDel, baudrate, numWrite, numRead,
ctypes.byref(dataArray))
if ecode != 0:print ecode # TODO: Switch this out for
exception
return {"idnum":long, "data":dataArray}
Here is the method signature of the c function:
long Asynch(long *idnum,
long demo,
long portB,
long enableTE,
long enableTO,
long enableDel,
long baudrate,
long numWrite,
long numRead,
long *data)
Thank you in advance,
Sam
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Re: ValueError: Procedure probably called with not enough arguments (8 bytes missing)
On Aug 7, 4:16 pm, LabJack Support wrote:
> Hello! I am chasing around a problem that I am having with ctypes and
> I am hoping someone can help out. Here is the Python code:
>
> def asynch(self, baudrate, data, idNum=None, demo=0, portB=0,
> enableTE=0, enableTO=0, enableDel=0, numWrite=0, numRead=0):
> """
> Name: U12.asynchConfig(fullA, fullB, fullC, halfA, halfB,
> halfC, idNum=None, demo=None, timeoutMult=1, configA=0, configB=0,
> configTE=0)
> Args: See section 4.12 of the User's Guide
> Desc: Requires firmware V1.1 or higher. This function writes
> to the asynch registers and sets the direction of the D lines (input/
> output) as needed.
>
> >>> dev = U12()
> >>> dev.asynchConfig(96,1,1,22,2,1)
> >>> {'idNum': 1}
> """
>
> #Check id number
> if idNum is None:
> idNum = self.id
> idNum = ctypes.c_long(idNum)
>
> # Check size of data
> if len(data) > 18: raise ValueError("data can not be larger
> than 18 elements")
>
> # Make data 18 elements large
> dataArray = [0] * 18
> for i in range(0, len(data)):
> dataArray[i] = data[i]
> print dataArray
> dataArray = listToCArray(dataArray, ctypes.c_long)
>
> ecode = staticLib.AsynchConfig(ctypes.byref(idNum), demo,
> portB, enableTE, enableTO, enableDel, baudrate, numWrite, numRead,
> ctypes.byref(dataArray))
>
> if ecode != 0:print ecode # TODO: Switch this out for
> exception
>
> return {"idnum":long, "data":dataArray}
>
> Here is the method signature of the c function:
>
> long Asynch( long *idnum,
> long demo,
> long portB,
> long enableTE,
> long enableTO,
> long enableDel,
> long baudrate,
> long numWrite,
> long numRead,
> long *data)
>
> Thank you in advance,
> Sam
Whoops I am sorry. The problem was due to a typo.
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