[beagleboard] BeagleBone intefacing PCF8574...


I used i2c support library from libkorebot. It’s just a wrapper on /dev/i2c* but makes life much easier. You don’t need to link the entire library, I used only i2c-related modules. I see that it also has support for reading and writing to pcf8574, it depends on other parts of the library, so it may be easier just to use i2c transfer functions.