modification Qsys

Hi everyone

I'm working on a Terasic balance_car project in the DE10-NANO board by using Nios2.first of all, I using the BAL_CAR_Nios_Code project's demo code of Terasic, also add the EPCS Flash controller's IP in Qsys, it programs in EPCS64 and works successfully. Then I want to add PIO IP in Qsys, but it works not correctly, even my original function.

Below is my step:

1.add PIO IP in QSYS (set five input)

2. click system>>assign base address

3.ctrl+s(save QSYS), and generate HDL

4.click close

The steps in QSYS

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1.add export name in main code.

2.compilar(the pin was set already ).

The steps in Quartus

 

connect  

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1. In bsp folder: ''NIOS2">>"generate BSP" ->"clean project"-> Build project

2.In main.cpp folder: "NIOS2">>"Editor BSP" -> Build project

The steps in Eclipse

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Finally, I combine .sof and .elf to .jic, and program on EPCS64, but this step already check is correct by trying another project.

Hope anyone can find a mistake in my step.

Thank's for anyone to give me advice.

attach Terasic's demo project.