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Altera_Forum
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12 years ago

Programming NIOSII interfaced with custom component, using Avalon MM Interface

Hello Everyone, I am trying to interface NIOS II with a custom component using Avalon MM Inferface where NIOS acts as Master. During the C coding, how do i get access to the function to send/...
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Altera_Forum
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11 years ago

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Hi,

I succeeded in implementing the system on board. My custom component is a 128 tap FIR filter which is to be started by NIOS and stimuli is also provided by nios. I made the custom component in Qsys and implemented the system.

Now i am able to write the c code successfully on the NIOS without any tool errors.

But, i am not able to communicate properly. Below is my code:

int var =1234;

IOWR(20496,0,11);

printf("%d\n",var); //prints 1234

var = IORD(20496,0);

printf("%d\n",var); // prints 0

When I am reading the same address and offset, it gives 0.

--- Quote End ---

HI,

I'm currently facing the issues as mentioned in the quote above.

May I know the way you resolve it?

Thanks

HY