Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Implementation of ISR in Nios 3.20 SDK

Hello Could somebody tell me that the following testisr.c program is correct. The ISR “irq_handler” is installed by “nr_installuserisr” procedure. The parametr “context” is set to pointer to &stab...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Hi chris01,

> Could somebody tell me that the following testisr.c program is correct.

I don't have time right now to look more closely ... but you might want to

consider making 'pst' point to a volatile structure (either make the struct

volatile, or make the referenced object volatile) . Your interrupt may well be

working fine ... but your main thread may never actually access memory

after the first read.

Regards,

--Scott