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Altera_Forum's avatar
Altera_Forum
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15 years ago

IRQ not detected from C program.

Hello I wrote a simple program to start learning IRQ programming. I created a simple SOPC custom component (called simper_irq). This is the HDL: pastebin.com/9fyfZQtL Also, I create...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I'm not an expert of custom sopc component.

Have you associated the irq_port signal to the avalon irq line? I think this should be in the _hw.tcl file.

Other remark: in the HDL you assign irq a high level but never clear it. I think this is not correct.

The C code is correct, provided SIMPLER_IRQ_0_IRQ really refers to your component irq. Again: in the isr you must reset the irq otherwise it will retrigger perpetually