public link unit led0 {} = driver.led0;
public link unit digital0 {} = driver.digital0;
public link bit 已点亮 = driver.open_status;
public link bit 已熄灭 = driver.close_status;
public link void OS_init(){} = driver.OS_init;
public link void 点亮(){} = driver.open;
public link void 熄灭(){} = driver.close;
public link void 反转(){} = driver.swap;
