Device Driver - before I start
Henrik W Lund
henrik.w.lund at broadpark.no
Sat Jul 17 15:15:31 PDT 2004
Richard Kaestner wrote:
>Is there a helping hand to give me some advice where / how to start?
>- a "pseudo device", which collects every now and then data from an external
> box via serial line (/dev/cuaa1)
> Box-Status and some more information shoud be readable,
> whichever Commands have to be sent to the Box could be done via ioctl
>- using FreeBSD 4.10 ( going to 5.x later)
>- I am currently reading:
> FreeBSD Handbook and Developers Handbook
> Daemonnews: Oct 2000: KLD example / Tutorial
> ( and McKusik's Design ...)
>- And finally: this is going to be my first Unix-Driver ...
> (although, I have some experience in low-level programming)
>I need Infos on:
>- is there a "better" (or "more preferred") way than written above?
>- is there a "simple example driver" doing similar things
>- actually, can I simply access /dev/cuaa1 from "inside" a driver ?
> (suppose, I should not ...)
>- or should I simply / better stay with a daemon ?
>thanks in advance for hints!
As has been pointed out to me just recently:
is an excellent primer on FreeBSD drivers (maybe a bit dated, but it
-Henrik W Lund
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