alt_timestamp returns the same value

Thank you pororo,

I tried below but still not working:

int main()

{

alt_u32 t1;

alt_u32 t2;

alt_u32 t3;

unsigned int i;

int ret = alt_timestamp_start();

t1 = alt_timestamp();

for(i=0; i<0x00ffffff; i++) IORD(ONCHIP_MEMORY2_1_BASE,0);

t2 = alt_timestamp();

t3 = alt_timestamp_freq();

return 0;

}

I still get 4209704959 for both t1 and t2.

I had never faced this problem when I was using

Cyclone IV Development or Custom boards with

QuartusII, SOPC Builder & NiosII 11.0sp1.

I wonder what I am missing..