Here is a list of all variables with links to the structures/unions they belong to:

i2c : c16x12r_t
i2c_address : c16x12r_cfg_t
i2c_speed : c16x12r_cfg_t
intb : c16x12r_cfg_t, c16x12r_t
leds : c16x12r_t
rst : c16x12r_cfg_t, c16x12r_t
scl : c16x12r_cfg_t
sda : c16x12r_cfg_t
sdb : c16x12r_cfg_t, c16x12r_t
slave_address : c16x12r_t
text_rotation : c16x12r_t