timestamp

#include "sys/alt_timestamp.h"# include "my_app.h"

alt_u32 time1;

alt_u32 time2;

int main(void)

{

if(alt_timestamp_start()<0)

{

printf("No timestamp device aviable\n");

}

else

{

time1=alt_timestamp();

}

while (1)

{

....................... //my application

........................//my application

time2=alt_timestamp();

printf("time execution= %u ticks\n",(unsigned int)(time2-time1));

}

}

"undefined reference to &#39; alt_timestamp_start &#39; undefined reference to

&#39; alt_timestamp&#39;

In effects these functions are not in the file "sys/alt_timestamp.h"

but i found them in the file "altera_avalon_timer_ts .c "

I try also to include this file but nothing

I cannot understand

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