ociic_read
stat = ociic_read(sc, I2C_SR);
stat = ociic_read(sc, I2C_SR);
((uint8_t *)buf)[i] = ociic_read(sc, I2C_RXR);
ociic_write(sc, reg, ociic_read(sc, reg) | bits);
ociic_write(sc, reg, ociic_read(sc, reg) & ~bits);