Forum Discussion

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

Nios stops responding to interrupts

Using Nios(3.2), Nios32@30mhz with some user logic modules in the C4. The simplest possible ISR will works a random number of times (< 30) and then stop working. The IRQ signal from the user logic is...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
22 years ago

No timer at all in SOPC &#39;system contents&#39; or in excalibur.h. If its there, it looks like it is not accessible from the GUI. Are we talking about a baud rate reload timer? I do see that each of my 4 serial ports has an IRQ#. Since these are all of higher priority than the ISR I am testing, changing their priority wouldn&#39;t fix anything. On the other hand, if I misunderstood and need to explicitly reenable interrupts inside my ISR for any ISR to work, then that explains why it would lock, it just does not explain why it locks only after a seemingly random# of interations.