AR_RTSEnable
| (flags & HAL_TXDESC_RTSENA ? AR_RTSEnable : 0)
| (flags & HAL_TXDESC_RTSENA ? AR_RTSEnable : 0);
ds_ctl0 |= AR_RTSEnable;
ds_ctl0 &= ~AR_RTSEnable;
(ads->ds_ctl0 & ~(AR_RTSEnable | AR_CTSEnable));
flags = ads->ds_ctl0 & (AR_CTSEnable | AR_RTSEnable);