I want to set the clock rate and I didn’t know whether there is a function about this . Can anybody know it and help me? Thank you! 
ClockPeriod(), ClockPeriod_r()
Get or set a clock period
Synopsis:
#include <sys/neutrino.h>
int ClockPeriod( clockid_t id,
const struct _clockperiod * new,
struct _clockperiod * old,
int reserved );
int ClockPeriod_r( clockid_t id,
const struct _clockperiod * new,
struct _clockperiod * old,
int reserved );
Thanksï¼