External interrupts in Xilinx Microblaze

[Wild Life]

Hello everybody, I'm connecting peripherals to Microblaze in XPS and I'd like to connect several external interrupts (9, exactly) to an external interrupt controller. I thought I'd have to use a 9-bit GPIO but it generates an interrupt request when 1 bit is changing value, without differences betwen the bit that is changing (100000000 as 001000000 generates the same interrupt request). is there a way to connect Axi Interrupt Controller to external pins without using 9 1-bit GPIOs for 9 Interrupt requests?

 

[mrflibble]

The interrupts are inputs TO microblaze? As in there is an external interrupt source and microblaze is the sink for 9 seperate interrupts?

You could of course do the following:

You wire-or the 9 interrupt inputs, the result of which is a single interrupt line going into microblaze. And you conveniently also read in the 9 lines as GPIO. So you have 1 interrupt input, and then 9 regular boring inputs for priority decoding. And if you feel like it you can do the priority decoding before you send it to microblaze, which would get you a 4-bit priority.

 

[Wild Life]

The interrupts are inputs TO microblaze? As in there is an external interrupt source and microblaze is the sink for 9 seperate interrupts?

You could of course do the following:

You wire-or the 9 interrupt inputs, the result of which is a single interrupt line going into microblaze. And you conveniently also read in the 9 lines as GPIO. So you have 1 interrupt input, and then 9 regular boring inputs for priority decoding. And if you feel like it you can do the priority decoding before you send it to microblaze, which would get you a 4-bit priority.

yes, external interrupts from peripherals to microblaze