Re: pcidio32 pattern I/O

On Wednesday 07 August 2002 19:02, you wrote:
> On Wed, Aug 07, 2002 at 03:33:43PM +0000, Dominik Kuhlen wrote:
> > Hello
> >
> > I'd like to use pattern I/O transfer with the NI6533.
> > i.e. : Using the REQ1 as clock (internally generated)
> > and reading 16-Bit (A0-B7) digital values.
> > The ni_pcidio.c sourcecode tells me that this should
> > work, but it doesn't. The read() call works but no clock
> > is generated.
>
> I assume you mean that you don't see the clock on an
> external pin.  You will need to hack the driver to do
> this, since it was never added.
Yes, that is the situation. I read the DAQ-DIO tech. ref. manual
but I can't figure out what's missing, because the ni_pcidio_cmd
function does exactly what the manual says in chapter 4.
Is there some kind of "hidden" bit that enables REQ1 pin as clock ?
I thought this is done by writing 4 to ReqReg.
Or do I lack the right documentation?

I tried the example that I found in the DIO 6533 Register-Level
programmer Manual about burst handshaking transfer, and this works 
(i.e. I can see a clocksignal on the pclk pin)

Do you (does anybody) know how to solve this, or do I have to
contact NI for further information.

Thank you
	Dominik

Received on 2002-08-08Z16:05:18