public link void OS_init(){} = driver.OS_init;
public link void ƵΪ_Hz(bit n1){} = driver.set_hz;
public link void Ϊ_΢(bit n1){} = driver.set_us;
public link void Ϊ_(bit n1){} = driver.set_ns;
public link void ʼ(){} = driver.start;
public link void ֹͣ(){} = driver.stop;
