Hi,
I'm trying to use a SDK(dll file) with python ctypes to take measurement from a
spectrometer. I some how got the deceive connected and took the measurement ,
but when I try to call one of its calculation function I'm getting the
"exceptions.ValueError: Procedure probably called with not enough arguments (8
bytes missing)" error.
I believe I have called the function with proper arguments and data types. I
would really appreciate some help.
The Function:
mydll =
ctypes.windll.LoadLibrary("D:\\WILD2\\tools\\WildVerification\\lib\\jeti_core.dll")
device = ctypes.c_int()
dvError = mydll.JETI_OpenDevice(0,ctypes.byref(device))
X_value = ctypes.c_float()
Y_value = ctypes.c_float()
Z_value = ctypes.c_float()
dvError =
mydll.JETI_CalcXYZ(device,ctypes.byref(X_value),ctypes.byref(Y_value),ctypes.byref(Z_value))
Function Documentation:
3.112 JETI_CalcXYZ
This function returns the calculated tristimulus XYZ.
3.112.1 Prototype
DWORD JETI_CalcXYZ (DWORD dwDevice, FLOAT *fX, FLOAT *fY, FLOAT *fZ)
3.112.2 Parameters
Input
Name Type Description
Call
dwDevice DWORD Handle to a device as
By value
returned by
JETI_OpenDevice
fX FLOAT* pointer to a variable
By reference
where the tristimulus X
will be stored
fY FLOAT * pointer to a variable
By reference
where the tristimulus Y
will be stored
fZ FLOAT * pointer to a variable
By reference
where the tristimulus Z
will be stored
-
Gokul Santhirakumaran
Electrical Engineer(Co-op)
CHRISTIE
809 Wellington St. N.
Kitchener, ON, Canada N2G 4Y7
PH: +1 519-744-8005 x7313
www.christiedigital.com<http://www.christiedigital.com>
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