Interrupt from external device

[Altera_Forum]

Hi from a new member. 

 I've interfaced an external device to Nios II using the "user logic" option. The external device is memory mapped, and the basic interface works OK...using the component editor I have successfully provided data, address, RdWrn, Wait, etc. I was able to peek and poke, as well as reading/writing with C code.  Once this worked, I wanted to have the external device's IRQn pin cause a Nios interrupt. I added an IRQn signal in the component editor, but...   no IRQn pin appeared on the SOPC symbol  no IRQ number appeared in the System contents IRQ column.  The conclusion I have reached is that adding the IRQn signal in the component editor pertains to the avalon bus, and that creating an external IRQ input pin is a separate matter.  I imagine I can accomplish this by implementing a single-bit PIO that interrupts on falling edge and connecting the external device to this pin. Is this the way to go? Is there a better way?  Thanks!

[Altera_Forum]

I used the older "legacy components ->interface to userlogic" and it  

works with an external interrupt.   I simply setup the interface as following  Interface to user logic:  PORTNAME WIDTH DIRECTION SHARED TYPE address 8 input yes address  write_n 1 input yes write_n read_n 1 input yes read_n data 8 inout yes data chipselect_n 1 input --- chipselect_n irq_n 1 output --- irq_n  After updating the symbol in quartus, there is the irq pin on the cpu symbol.   I think there seems to be some problems with the new component editor, so perhaps  try the old interface.  Perhaps somebody from Altera can answer this question, i have read some problems about the new component editor, does it works ???

[Altera_Forum]

Thanks for reply. 

 Yes, that&#39;s basically what I did with the new component editor...the expected interrupt pin didn&#39;t show up http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif