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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

the problem of the PIO interrupts

Hello,everybody!

My program can't get into the interrupt fuction. the code like is the following.is there any questions? and I can't use a main() but alt_main(),if I use main() the nisoII IDE show me many errors;I use a CPU /e.

CODE:

# include "system.h"# include "altera_avalon_pio_regs.h"# include "alt_types.h"# include "sys/alt_irq.h"

volatile int edge_capture;

void Sirq(void * context,alt_u32 id)

{

IOWR_ALTERA_AVALON_PIO_EDGE_CAP(PIO_SWITCH_BASE, 0);

IOWR_ALTERA_AVALON_PIO_DATA(PIO_LED1_BASE,IORD_ALTERA_AVALON_PIO_DATA(PIO_SWITCH

_BASE));

}

int main (void) __attribute__ ((weak, alias ("alt_main")));

int alt_main (void)

{

alt_irq_register(PIO_SWITCH_IRQ,(void *)0,Sirq);

IOWR_ALTERA_AVALON_PIO_EDGE_CAP(PIO_SWITCH_BASE, 0);

IOWR_ALTERA_AVALON_PIO_DIRECTION(PIO_SWITCH_BASE, 0);

IOWR_ALTERA_AVALON_PIO_IRQ_MASK(PIO_SWITCH_BASE, 0xff);

while (1)

{

}

return 0;

}

Thanks~!

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    You can't use alt_main() _and_ the alt_irq_register() function. You've got to be using a program with main(). I know that you mentioned that you had troubles compiling code with main() in it, but you have to have it if you want to use the HAL functions. (like alt_irq_register())

    By using alt_main() you're telling the tools that you don't want to use any of the HAL's functionality.

    The count_binary() example shows you how to do this.

    Best Regards,

    - slacker