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I'm currently working on the Altera DE0 board with the QuartusII Web Edition software. I need to use a nios processor on Qsys to display a shifted signal from a GPIO pin on my board. The input signal would be a clock signal from an external source. The problem is that I have no idea how I can write a program in C (on the Eclipse IDE) for diplaying a delayed clock on an oscilloscope. My Qsys design looks like that Image1 => Qsys Design and here the Eclipse IDE where I have to write my C program Image2 => Eclipse IDE Please help me ! thank you very much in advance for the replies

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start with the system.h file to know which base_address is assigned to each peripherial, then you can use pointers to directly access the GPIO or use the IORD/IOWR functions.

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