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[Nios II] How Can I define the pio inputs as a interrupt?

I use the Nios II system to achieve my design. I have define a data bus from the outside of the FPGA, I use a 8-bits PIO ip to connect the signal and the FPGA.

I want to achieve the following aim: when the outside signals changes, Nios generates a IRQ to CPU, and I can insert my instructions.

Please tell me , how can I do it ?

Reply to
hezhikuan2007
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Read Chapter 13 of the QUartus II Handbook Volume 5. (aka n2cpu_nii51007-2.pdf)

Or if that's not quite what you need, create a (trivial) SOPC component that generates an interrupt when you need to.

Regards,

--
Mark McDougall, Engineer
Virtual Logic Pty Ltd, 
21-25 King St, Rockdale, 2216
Ph: +612-9599-3255 Fax: +612-9599-3266
Reply to
Mark McDougall

Thank you very much! You give me a lot!

Reply to
hezhikuan2007

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