FIFO:How to slow down the clock Frequency from 50 Mhz

Hi

On-Chip Memory Size is 4096

FIFO Depth : 1024

So, have i have set the

 # define ALMOST_EMPTY 1
 # define ALMOST_FULL 1000               //FIFO Depth 1024

The ALMOSTEMPTY and ALMOSTFULL printed in the console are correct.

# define ALMOST_EMPTY 1
 # define ALMOST_FULL 1000               //FIFO Depth 1024
 
int main()
{
 
       	 int result,i=0;
      // 	Reset the FIFO's IRQ History register. *
       	altera_avalon_fifo_clear_event(FIFO_0_IN_CSR_BASE, ALTERA_AVALON_FIFO_EVENT_ALL);
 
    	  int code = ALTERA_AVALON_FIFO_OK;
    	  code= altera_avalon_fifo_init(FIFO_0_IN_CSR_BASE, 0x3F,ALMOST_EMPTY,ALMOST_FULL);
 
    	 IOWR(ENABLE_PIO_BASE, 0, 0x1);
    	 printf("STATUS = %u\n", altera_avalon_fifo_read_status(FIFO_0_IN_CSR_BASE,altera_avalon_fifo_read_status));
    	 while(1)
    	 {
    	 result=altera_avalon_fifo_read_fifo(FIFO_0_OUT_BASE,FIFO_0_IN_CSR_BASE);
     printf("%d\n",result);
    
    	 }
	return 0;
}

In NIOS console,

STATUS =16

result: 0

Suggestion Please