niosII in port data read problem

To verify your pin is connected to the proper path to your SOPC/Q-SYS instantiation:

1. Open up your project in Quartus II. On the "Project navigator" pane, select the "Hierarchy" tab. (if you do not see the "Project Navigator" pane, there is a button in the toolbar to open it)

2. You should see a Verilog or VHDL file at the top of the tree. Double click on it.

3. Look for the pin name in the top level file. Verify that it is connected to the PIO of your SOPC/Q-SYS design.