How to use interrupt?

Are you sure it is working well, because i am using your programme with just creating one single thread (led glow)but i am getting stuck after applying interrupt ,do youknow why,here is my programme,

# include <cyg/hal/io.h> // for IOWR and IORD# include <cyg/kernel/kapi.h>

unsigned char ledpio;

cyg_interrupt int_pio;

cyg_handle_t int_pio_handle;

static void ledglow(cyg_addrword_t data)

{

volatile char* a=0x2120890;//writing to the base of ledpio for 111 sequence

*a=0x7;

}

cyg_uint32 isr_pio( cyg_vector_t vector ,cyg_addrword_t data)

{

cyg_interrupt_mask(vector);

cyg_interrupt_acknowledge(vector);

IOWR(BUTTON_PIO_BASE , 3, 0x00); // Reset the edgecapture register

ledpio = 0x8; //

IOWR (LED_PIO_BASE , 0, ledpio);

return(CYG_ISR_HANDLED);

}

void dsr_pio( cyg_vector_t vector,cyg_ucount32 count,cyg_addrword_t data)

{

}

void cyg_user_start(void)

{# define STACK_SIZE 0x1000

static char stack[STACK_SIZE];

static cyg_thread thread_data;

static cyg_handle_t thread_handle;

cyg_thread_create(10,ledglow,0,"interrupt test",&stack[0],STACK_SIZE, &thread_handle,&thread_data);

cyg_thread_resume( thread_handle);

cyg_interrupt_create(BUTTON_PIO_IRQ, 99,0,&isr_pio,&dsr_pio,&int_pio_handle,&int_pio);

cyg_interrupt_attach(int_pio_handle);

cyg_interrupt_unmask( BUTTON_PIO_IRQ);

IOWR(BUTTON_PIO_BASE , 1, 0x0);// PIO in input

IOWR(BUTTON_PIO_BASE , 3, 0x00);// Reset the edgecapture register

IOWR(BUTTON_PIO_BASE , 2, 0x01);// unmask bit0 all other masked

}

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originally posted by glecordier@Feb 6 2006, 06:31 AM

i use the interrupt with the button pio like that:

# include <cyg/hal/io.h> // for iowr and iord

unsigned char ledpio;

cyg_interrupt int_pio;

cyg_handle_t int_pio_handle;

cyg_uint32 isr_pio( cyg_vector_t vector,

cyg_addrword_t data){

ledpio = ledpio|1; //

iowr (led_pio_base , 0, ledpio);

cyg_interrupt_mask(vector);

cyg_interrupt_acknowledge(vector);

iowr(button_pio_base , 3, 0x00); // reset the edgecapture register

ledpio = ledpio&~1; //

iowr (led_pio_base , 0, ledpio);

return(cyg_isr_handled | cyg_isr_call_dsr);

}

void dsr_pio( cyg_vector_t vector,

cyg_ucount32 count,

cyg_addrword_t data){

ledpio = ledpio|2; //

iowr (led_pio_base , 0, ledpio);

cyg_interrupt_unmask(vector);

ledpio = ledpio&~2; //

iowr (led_pio_base , 0, ledpio);

}

void cyg_user_start(void)

{

cyg_thread_create(..);

cyg_thread_resume(..);

cyg_interrupt_create(

button_pio_irq, // in /include/cyg/hal/system.h

99,

55,

&isr_pio,

&dsr_pio,

&int_pio_handle,

&int_pio);

cyg_interrupt_attach(int_pio_handle);

cyg_interrupt_unmask( button_pio_irq);

iowr(button_pio_base , 1, 0x00);// pio in input

iowr(button_pio_base , 3, 0x00);// reset the edgecapture register

iowr(button_pio_base , 2, 0x01);// unmask bit0 all other masked

}

i use the altera demo board cyclone ep1c20f400

with the pio core descriped in chapter 7 of the nios ii processor reference handbook

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=12562)

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