En Wed, 05 Aug 2009 20:12:09 -0300, Sparky <[email protected]> escribió:
Hello! I am trying to call this method:
long _stdcall AIBurst(long *idnum, [...]
long timeout,
float (*voltages)[4],
long *stateIOout,
long *overVoltage,
long transferMode);
I am having some problems with that float (*voltages)[4].
pointerArray = (ctypes.c_void_p * 4)
voltages = pointerArray(ctypes.cast(ctypes.pointer
((ctypes.c_long * 4096)()), ctypes.c_void_p), ctypes.cast
(ctypes.pointer((ctypes.c_long * 4096)()), ctypes.c_void_p),
ctypes.cast(ctypes.pointer((ctypes.c_long * 4096)()),
ctypes.c_void_p), ctypes.cast(ctypes.pointer((ctypes.c_long * 4096)
Why c_long and not c_float?
Anyway, this way looks much more clear to me (and doesn't require a cast):
arr4096_type = ctypes.c_float * 4096
voltages_type = arr4096_type * 4
voltages = voltages_type()
The program runs but the values that come back in the array are not
right.
Thay might be due to the long/float confusion.
--
Gabriel Genellina
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