uart interrupt

hi !

i'm trying to use interrupt in NIOS II ide for the uart.

Are two days that i study this problem .

I saw sw development and reference handbooks , and found different informations about uart core and hal api functions , and also read a lot of

driver devices and .h files .

I found also an example writing by Kira and use it for my case

the code is :

# include "count_binary.h"

volatile int t;

volatile int uart_0;

static void handle_uart_interrupt(void* context,alt_u32 id)

{

t++;

IOWR_ALTERA_AVALON_PIO_DATA(PM_OUT_BASE, t);

}

int main(void)

{

IOWR_ALTERA_AVALON_UART_CONTROL(UART_0_BASE, 0x180);

alt_irq_register(UART_0_IRQ,&uart_0,handle_uart_interrupt);

while( 1 )

{

}

return(0);

}

but not run .On my development board i can see the led switch on when

a caracter arrive , but the interrupt doesn't work

Somebody know if i forget something else ?

thanks

ciao

walter