- From: Mats Luspa <mats.luspa_at_irf.se>
- Date: Wed, 2 Oct 2002 16:22:30 +0200
Quoting John Sims <john_at_coherentimaging.com>: > On Wed, 2002-10-02 at 08:05, Mats Luspa wrote: > > Quoting John Sims <john_at_coherentimaging.com>: > > > > > On Wed, 2002-10-02 at 06:54, Mats Luspa wrote: > > > > Hello! > > > > > > > > Can someone explain the usage of comedi_dio_bitfield? > > > Hello Mats, > > > The comedi_dio_bitfield is a mechanism to write or read simultaneously > > > multiple bit positions on your parallel digital interface. Whether the > > > operation is a read or write depends on the specific device and > > > subdevice you are using. > > > > > > I hope this helps, > > > John Sims > > > > > > > > Thank you for the answer. I know the what the function do but I'm not sure > about > > the parameters to the function. Below you can see how I've used the > function, > > but it doesn't seem to work. What's the error? > The parameter bits should be a single int*, not an int[32]. You'll have > to examine the individual bit positions through shifting and masking. > > Give that a try. > Thank you, now it works. /Regards Mats -- Mats Luspa Phone: +46 (0)980 79 022 Institutet foer Rymdfysik Fax: +46 (0)980 79 050 Swedish Institute of Space Physics email: mats.luspa_at_irf.se Box 812 SE-981 28 Kiruna, Sweden
Received on 2002-10-02Z13:22:30