Re: [ctypes-users] copying/slicing ctypes arrays, (c_ulong *n)()

[RayS <ra...@bl...>]

Hi,
At 05:10 PM 12/16/2004 +0100, Thomas Heller wrote:
>But it *should* support slicing. =20

Yes, I got it going correctly, again...

>Another possibility would be to let the ADC write the data directly into
>the numArray, once you know it's address (and assuming it doesn't
>change).

I'm trying to figure out how this would be accomplished; I currently crea=
te a (c_long*2000)() to receive the result of the driver call
        buf =3D usb.EDRE_ADGetDataRaw(Sn,*Buf ,*BufSize)
where=20
usb =3D windll.EDRAPI #driver
Sn 32-bit unsigned integer Board=92s serial number.
*Buf Pointer to an array of 16-bit unsigned words
*BufSize Pointer to an array of 32-bit unsigned integers

As per you suggestion, the address and memmove() work fine, the address c=
alcs are easy.
So, how can I set up a windll call to the driver to plop data directly in=
to the numarray? (The 4us memmove() is actually fast enough; the driver c=
alls and other ops are now the majority of the time spent. I have 8000us =
between 2K buffers.)

Ray
Happy Holidays to all!=20