There is c code errors for using performance counter IP, but I can not debug this problem.

The followings are my c code, and "perf_print_formatted_report" has c code error... I don't no why...

#include "sys/alt_stdio.h"

#include "stdio.h"

#include "system.h"

#include "altera_avalon_pio_regs.h"

#include "altera_avalon_performance_counter.h"

#define SECTION_1 1

int main()

{

int count=0;

int delay;

alt_putstr("Hello from Nios II!\n");

PERF_RESET(PERFORMANCE_COUNTER_BASE);

PERF_START_MEASURING (PERFORMANCE_COUNTER_BASE);

PERF_BEGIN (PERFORMANCE_COUNTER_BASE,1);

PERF_END (PERFORMANCE_COUNTER_BASE,1);

PERF_STOP_MEASURING(PERFORMANCE_COUNTER_BASE);

perf_print_formatted_report (

(void *)PERFORMANCE_COUNTER_BASE, // Peripheral's HW base address

ALT_CPU_FREQ, // defined in "system.h"

1,

"1st_test"

);

while(1){

IOWR_ALTERA_AVALON_PIO_DATA(LED_BASE,count);

delay = 0;

while(delay<20000000){

delay++;

}

count++;

}

/* Event loop never exits. */

printf("Goodbye from Nios II - returning from main()!\n");

return 0;

}