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Altera_Forum's avatar
Altera_Forum
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10 years ago

questions about nios interrupts

hi everyone. there are 2 interrupts in my project interrupt A has lower poriority than interrupt B i think if the interrupt B comes when the code is executing the interrupt A's handler, the c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

i find the

alt_irq_interruptible();

alt_irq_non_interruptible();

can be used to make nested interrupts

but during debug, i find that only if the higher poriority interrupt happpens before alt_irq_interruptible(), then the code goto higher poriority interrupt handler.

but if the higher poriority interrupt happpens after alt_irq_interruptible(), then the code still in the lower poriority interrupt handler .

can the nios interrupt system works like the MCU?