- From: David Schleef <ds_at_schleef.org>
- Date: Tue, 24 Sep 2002 15:50:36 -0700
On Tue, Sep 24, 2002 at 06:10:29PM -0400, Alan Chen wrote: > I am having a troublesome problem with comedi and/or the dio board . It > seems that I must perform some akward operations for the board to work > correctly. > > So I am trying to set all the channels (0-23) in all the subdevices > (0-3) to either 1 or 0. It turns out that the following graph is what I > get (source pasted below): > > comedi_dio_write(...,1) alone gets a random amount of 1's and 0's > ~ (although they seem clustered) This sounds like a driver bug. I've suspected for a while that there might be problems in that area, but the code does exactly what the manual says, and there have been no complaints with other 8255 boards. I don't have the hardware to experiment with. dave...
Received on 2002-09-24Z21:50:36