Hello Ian, thank you for showing me the way.
I will check ioctl, gpioctl and gpio. I will continue to take a look on the *.c files (thank to S.) Thank you. Oliv. On Tue, 27 Nov 2018 09:34:39 -0600 Ian Sutton <i...@openbsd.org> wrote: > On Sun, Nov 25, 2018 at 3:45 AM Olivier Burelli <oliv...@burelli.fr> > wrote: > > For the moment, I manage to light via GPIOCTL, a LED on the pin 23 > > header P9. > > > > $ doas gpioctl gpio1 17 on > > > > my /etc/rc.securelevel: > > > > # Digital Output: > > gpioctl gpio1 17 set out pinH9_23 > > gpioctl gpio3 21 set out pinH9_25 > > gpioctl gpio3 25 set out pinH9_27 > > > > Question : in this way (I am not an expert in programming): > > > > _ Should I create a tree (directory) to turn on my LED in C > > language ? > > No -- See below > > > _ Should I instead use the physical addresses to turn on my LED in > > C language ? > > Use ioctl(2) calls on the gpio device file. > > > _ Regarding analog inputs, are they recognized by the kernel as > > GPIO ? > > No, those pins are not wired to GPIO. They are there own thing. > > > _ Do you have some interesting link to documentations, to help > > me ? > > The gpio(4), gpioctl(8) man pages should suffice. If you have any > further issues you can mail this list. > > Best, > ians
