> > Since this comment is RS485 specific, it seemed a good starting place. But
> > how exactly does one go about using this tidbit of information? I'm a
> > supposed to go looping around waiting for all the data to be transmitted,
> > and then somehow release the bus? I didn't see any ioctl calls that seemed
> > suited to the task anyway. What exactly is intended here?
>
> You drive the bus by fiddling with the RTS or whichever other lines are
> driven to the bus. See TIOCMBIS/TIOCMBIC - at least with the RS485 PC
> cards I've worked with
If only it were that simple :)
With most other cards you would be right, but this one just had to be
different. Playing with the control lines doesn't seem to achieve much
(I'm not even sure the card is responding to the changes, to be honest).
I'm fairly certain that some fiddling needs to be done with the scratch
register, which means I may have to kludge something in for this board.
I'm not particularly surprised, but I want to keep the ugliness to a
minimum.
Guess I'll just be trying a few things and see what (if anything) works :)
Thanks.
--
Chris Arguin | "...All we had were Zeros and Ones -- And
Chris.Arguin@unh.edu | sometimes we didn't even have Ones."
+--------------+ - Dilbert, by Scott Adams
http://leonardo.sr.unh.edu/arguin/home.html |
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