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Altera_Forum
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21 years ago

60 Uart's ?

I want to realize 60 Uart's on NIOS2 cpu I can add 60 in SOPC builder only 32 IRQ can be assingd What happen whit these other UART that have no IRQ? Can someone tell that? And how can i f...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Hi,

You can connect 32 of these irq signals to a PIO. Let the PIO generate an interrupt. And in the interrupt routine, read the pio to look what UART triggered it.

If you do 2 of them, you can process 64 interrupts with 2 pins.

You can do a bit better by making a user peripheral with 60 inputs for the IRQ's and one output to interrupt the processor. Reading from the custom hardware can give you directly the number of the uart that you want to process first (if you do some priority encoding).

Stefaan.