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Otherwise copy the core directory wherever You want and add a new search path in Qsys settings.
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Which I2C file do You mean?
The only one , that seems to be relevant is:
\altera_12.1_177\ip\altera\sopc_builder_ip\altera_mp32\HAL\src\alt_iic.c
I added this path to IP search path in Qsys settings and refreshed the system.
But I2C QSys component did not appear in QSys Library ....
Or maybe I cannot find it , where in QSys Library should it appear ?
Or maybe alt_iic.c is not enough to create I2C QSys component?