Nios II UART IRQ on DE0 Dev Board

**DE0 Development Board running NIOS II soft-processor**

I have successfully implemented a UART core as part of my NIOS II SOPC build. Using Eclipse NIOS II IDE I have compiled and downloaded an application that polls the UART for characters and when the end of string character is found the full received string is returned over UART to a PC.

This polling process works to an extent but I am struggling to get the interrupt handler for the UART to function correctly. I am trying to use an ISR to capture characters on the UART and store them in an array. A separate task will then parse the data accordingly.

Any help on this matter will be much appreciated!

Thanks for your time.

Kris