I am getting the warning. --- Quote Start --- warning: implicit declaration of function 'alt_irq_register' --- Quote End --- Call in code is alt_irq_register(CODEC_SIMPLE_MASTER_2_0_IRQ_INTERRUPT_CONTROLLER_ID, (void *) NULL, codec_isr); I have also included <alt_irq.h> Can I ignore this warning?

Have you implemented the internal irq controller or the VIC? If the latter, you must use the enhanced interrupt APIs: alt_ic_isr_register

--- Quote Start --- Have you implemented the internal irq controller or the VIC? If the latter, you must use the enhanced interrupt APIs: alt_ic_isr_register --- Quote End --- The internal interrupt controller.

Try # include "alt_legacy_irq.h" although this should be automatically included by alt_irq.h whenever the enhanced irq APIs are not enabled, namely if you don't use the external irq controller.

I am now getting warning: alt_legacy_irq.h: No such file or directory

--- Quote Start --- I am now getting warning: alt_legacy_irq.h: No such file or directory --- Quote End --- Ok.... I included # include "priv/alt_legacy_irq.h" Now I get warning..... "passing argument 3 of 'alt_irq_register' from incompatible pointer type" Prototype for alt_irq_resgister in priv/alt_legacy_irq.h is extern int alt_irq_register (alt_u32 id, void* context, alt_isr_func handler); As I said my file calls alt_irq_register(CODEC_SIMPLE_MASTER_2_0_IRQ_INTERRUPT_CONTROLLER_ID, NULL, codec_isr); codec_isr is handler and is defined as static void codec_isr(void * context, alt_u32 id) { .... ..... ...... }

Basic NIOS II interrupt. | Altera Community

14 Replies

Altera_Forum
Honored Contributor
13 years ago
I can't see any BSP config however this is where I am at.

I got the thing to build again using

ALT_ENHANCED_INTERRUPT_API_PRESENT

And using Enhanced Interrupts.

I set up the interrupt in code by calling

alt_ic_isr_register (CODEC_SIMPLE_MASTER_2_0_IRQ_INTERRUPT_CONTROLLER_ID, CODEC_SIMPLE_MASTER_2_0_IRQ, codec_isr, NULL, 0x0);

My interrupt service routine is.

static void codec_isr (void *context)
{

}

This builds fine however the processor seems to hang when the interrupt is asserted.

I did an enhanced interrupt based PIO based project and I can get into the interrupt here (to check if my setup was correct).

So my custom peripheral's interrupt seems to hang the NIOS II processor. (The main loop is no longer running).

Weird.

Any ideas?
Altera_Forum
Honored Contributor
13 years ago
Found the problem.

Me and my software bugs.

I was setting up the DMA with a wrong address and probably overwriting a critical area of memory.

Ooops.... :oops:
Altera_Forum
Honored Contributor
13 years ago
only you include# undef ALT_ENHANCED_INTERRUPT_API_PRESENT and dissapear the warning???

I've incluided this line, but the warning continues, and the interrupt doens't work

Help me in this problem
Altera_Forum
Honored Contributor
13 years ago
By default ALT_ENHANCED_INTERRUPT_API_PRESENT is defined. Therefore you need to set up with the interrupt prototypes for these given in the appropriate header file.

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Basic NIOS II interrupt.

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