NIOS II hard fault due to pulse interrupt

[CLope30]

Hi,

I have a NIOS II system and I was sending a pulse interrupt (of 16 clock cycles). The NIOS was going to an exception handler instead of the ISR. I changed the pulse to a level signal and added a clear signal controlled by a PIO bit and now the ISR is executed.

The question is, why the hard fault? I would expect that the NIOS would miss the pulse and do nothing.

Regards,

Carlos

[RInfo1]

Also waiting for answer.

Recliner Info

[Ahmed_H_Intel1]

Hi, The interrupt will push the NIOS II to go to the exception handler and usual. Please check the following document for more info. https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/nios2/n2sw_nii52006.pdf Regards,