IRQ not detected from C program.

[Altera_Forum]

Hello 

 I wrote a simple program to start learning IRQ programming. I created a simple SOPC custom component (called simper_irq). This is the HDL:  pastebin.com/9fyfZQtL  Also, I created a simple program in C. This is the source:  pastebin.com/bmChv4vh  The value of flag should increase (at least once). However, it's the same all the time.  I can't see where I'm wrong.  Could anybody help me?  Thanks a lot.

[Altera_Forum]

I can't see the attachments

[Altera_Forum]

Here we go again. 

 There's no attachements. These are the links:  http://pastebin.com/9fyfzqtl  http://pastebin.com/bmchv4vh   Thanks.

[Altera_Forum]

I'm not an expert of custom sopc component. 

Have you associated the irq_port signal to the avalon irq line? I think this should be in the _hw.tcl file. Other remark: in the HDL you assign irq a high level but never clear it. I think this is not correct. The C code is correct, provided SIMPLER_IRQ_0_IRQ really refers to your component irq. Again: in the isr you must reset the irq otherwise it will retrigger perpetually

[Altera_Forum]

have you include the irq header? 

   --- Quote Start ---  #include <sys/alt_irq.h>  --- Quote End ---  

[Altera_Forum]

You shouldn't cast your function pointer to the interrupt handler and it should be with the correct prototype: 

void simpler_interrupts(void *context, alt_u32 id); As flyinghigh says, you should also include the alt_irq.h file to get the correct declaration for the register function. Check also the code returned by alt_irq_register()