C++ and PERL Hardware Abstraction Library

• Look up the BeagleBone System Reference Manual and determine that pin 3 on connector P8 corresponds to GPIO1[6]
• Set the pin muxing to mode 7 + input + pull-down by writing 007 to /sys/kernel/debug/omap_mux/gpmac_ad6
• Export the GPIO system files by writing 38 to /sys/class/gpio (btw, "38" does not come from P8[3], but from 1*32+6).
• Set the GPIO to input by writing "in" to /sys/class/gpio/gpio38/direction
• Sample the input by reading /sys/class/gpio/gpio38/value

Still with me? Bonelib makes it as simple as:

BeagleBone::gpio* inp = BeagleBone::gpio::P8(3);
inp->configure(BeagleBone::pin::IN, BeagleBone::pin::PD);

unsigned char val = inp->get();

voila!

Find the full user documentation at http://sourceforge.net/p/bonelib/wiki/Home/


Homepage: https://sourceforge.net/projects/bonelib/
Registrar: janick-bergeron.myopenid.com