RX8803_FLAGS
rc = iicdev_readfrom(dev, RX8803_FLAGS, ®, sizeof(uint8_t), IIC_WAIT);
rc = iicdev_writeto(dev, RX8803_FLAGS, ®, sizeof(uint8_t), IIC_WAIT);
rc = iicdev_readfrom(dev, RX8803_FLAGS, &flags, 1, IIC_WAIT);