COMM_SET_DURATION
if (ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del))
err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, 0);
err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM | COMM_TYPE, 0x40);
err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del);