JeLlyFish.software at gmx.net
Wed May 17 09:16:20 CEST 2006
On Tuesday 16 May 2006 16:18, Alain Michaud wrote:
> Do I need open a "file deccriptor" in order to communicate using
Yes, you have to open the device before talking to it. Or what the hell
do you think, the "Handle" parameter of
|Function FpIOCtl (Handle:cint;Ndx: culong;Data: Pointer):cint;
As always: RTFM, reading the man page (man 2 ioctl) actually might help
| [...] The argument d must be an open file descriptor.
| Usually, on success zero is returned. A few ioctls use
| the return value as an output parameter and return a non
| negative value on success. On error, -1 is returned, and
| errno is set appropriately.
BTW, I agree - writing device drivers sucks. I know. :-)
But checking out
may be worth a try.
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