public link bit ʱʱ = driver.count_time;
public link bit OS_time = driver.OS_time;
public link void OS_init(){} = driver.OS_init;
public link void (){} = driver.clear;
public link void ʼʱ(){} = driver.begin;
public link void ͣʱ(){} = driver.pause;
public link void OS_run(){} = driver.OS_run;
