I don't think that HDMI is supported yet so the only console i/o is via tty/cua.
For GPIO, OpenBSD has a standard interface using ioctl on /dev/gpio devices, with a higher-level interface provided by the gpioctl command, so when support is added that's how it would be done - see the gpio/gpioctl man pages, it's fairly straightforward to use. For onewire devices, the gpioow driver can be attached to pins at runtime which would provide access to those devices through the hw.sensors sysctl interface (which, btw, is also exported by snmpd). If you want to get a feel for how it works on currently supported hardware, gpio works on pcengines and soekris boards. I think watchdog/gpio/cpu speed control are all things which would be of fairly wide interest, and the frameworks are already there so it's just a case of driver support. Actually doing this depends on somebody having the hardware and being motivated to do the work. Not sure about other boards but it looks like the BBB does not have hardware support for WoL. (https://groups.google.com/forum/m/#!topic/beagleboard/gvPg08IFAP0) Byron Klippert <byronklipp...@ml1.net> wrote: >Hello, > > >I've been following the progress of the beagle/arm porting efforts and >am very interested with the project and it's potential for SCADA and >data logging applications. > >I have questions for the developers as to the roadmap and features one >can expect once this project matures. Please forgive if they seem naive >as my understanding of the hardware is limited. > > >- Can we expect to underclock the CPU using the systcl hw.setperf knob? > > >- Taking into account section 5.6 of the FAQ on custom kernels; will >disabling certain hardware increase the reliability of the system? ie: >in a SCADA application it's unlikely HDMI will be needed. > > >- Will the serial ports be accessible through TTY/CUA? > > >- Will there be a sysctl interface to work with some onboard GPIO pins, >similar to the way certain 1-Wire master/slave devices have been >integrated? Or will the I/O be accessible through a GPIO controller? > > >- Will the watchdog be accessible (if there is one)? > > >- Any plans for WoL support? > > >I understand that the developer's efforts are a limited resource and >want to thank you all for your time. Can't wait to start testing your >code. > > >Regards,
