I2C_TXR
ociic_write(sc, I2C_TXR, addr << 1);
ociic_write(sc, I2C_TXR, ((uint8_t *)cmd)[i]);
ociic_write(sc, I2C_TXR, addr << 1 | 1);
ociic_write(sc, I2C_TXR, addr << 1);
ociic_write(sc, I2C_TXR, ((uint8_t *)buf)[i]);