T
Todd Gardner
Hello all,
I need to ask for some of your expertise. How to define the variable
so that I can pass it as an array of 16 bit integers?
....
ni = windll.nidaq32
buffer = c_int * 100
status = ni.DAQ_Op (deviceNumber, chan, gain, buffer, count,
sampleRate)Traceback (most recent call last):
File "<string>", line 1, in ?
File "C:\Documents and Settings\tnt\My
Documents\pc\ctypes\DAQ_Op1.py", line 21, in ?
status = ni.DAQ_Op (deviceNumber, chan, gain, buffer, count,
sampleRate)
TypeError: while constructing argument 4:
Don't know how to convert parameter 4
"""
BEGIN DEFINITION of the variable array {buffer}
buffer [i16] contains the acquired data
buffer is an integer array. buffer has a length equal to or greater
than count. When DAQ_Op returns with an error number equal to zero,
buffer contains the acquired data.
The buffer must be aligned on a 4-byte boundary. If the buffer is
allocated as an array of i32s, it must be typecast to an i16 pointer
when passing its address to DAQ_Op. If the buffer is allocated as a
double-sized array of i16s, the user must check that the buffer is
aligned on a 4-byte boundary before passing the buffer to DAQ_Op.
END DEFINITION of the variable array {buffer}
"""
Thank you SO much for any information,
Todd
I need to ask for some of your expertise. How to define the variable
so that I can pass it as an array of 16 bit integers?
....
ni = windll.nidaq32
buffer = c_int * 100
status = ni.DAQ_Op (deviceNumber, chan, gain, buffer, count,
sampleRate)Traceback (most recent call last):
File "<string>", line 1, in ?
File "C:\Documents and Settings\tnt\My
Documents\pc\ctypes\DAQ_Op1.py", line 21, in ?
status = ni.DAQ_Op (deviceNumber, chan, gain, buffer, count,
sampleRate)
TypeError: while constructing argument 4:
Don't know how to convert parameter 4
"""
BEGIN DEFINITION of the variable array {buffer}
buffer [i16] contains the acquired data
buffer is an integer array. buffer has a length equal to or greater
than count. When DAQ_Op returns with an error number equal to zero,
buffer contains the acquired data.
The buffer must be aligned on a 4-byte boundary. If the buffer is
allocated as an array of i32s, it must be typecast to an i16 pointer
when passing its address to DAQ_Op. If the buffer is allocated as a
double-sized array of i16s, the user must check that the buffer is
aligned on a 4-byte boundary before passing the buffer to DAQ_Op.
END DEFINITION of the variable array {buffer}
"""
Thank you SO much for any information,
Todd