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Altera_Forum's avatar
Altera_Forum
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14 years ago

Create IRQ pin

On my design i have 2 processor, and i need to make for every one 2 pin( 1 input and one output). And relate the output for CPU1 with input for CPU2, also the iput from the CPU 1 with output from CPU...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

I presume your processors are Nios, then you can easily do it with PIOs.

One processor drives a PIO output which is connected to a PIO input (and possibly an IRQ) on the other processor. Same for signaling in the opposite direction.

This requires you connect PIOs externally to your sopc/Qsys module.

I think you could also make everything inside the module, if your cpu1 directly asserts the irq signal for irq2 and viceversa, but I don't know if this is easy to implement: probably you need to define a custom component which is capable to assert irqs.