Function mraa_sys::mraa_i2c_init_raw

pub unsafe extern "C" fn mraa_i2c_init_raw(bus: c_uint) -> mraa_i2c_context

Initialise i2c context, passing in the i2c bus to use.

@param bus The i2c bus to use i.e. /dev/i2c-2 would be "2" @return i2c context or NULL