Category: Nios® II
Tools: Nios II EDS
device:-


Due to software optimization, the confirmation process for the interrupt cause was activated before the first interrupt was cleared by the user, and after the first interrupt was completed, the interrupt was entered again immediately. It can be one of the causes.

As a countermeasure, it can be avoided by inserting code in the interrupt to determine whether the interrupt has been cleared or by replacing the context with a global variable.