DMAC_INTR_ENA_RX_
(DMAC_INTR_ENA_TX_ | DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_);
dma_intr_ena &= (~DMAC_INTR_ENA_RX_);
dma_intr_ena &= (~DMAC_INTR_ENA_RX_);
dma_intr_ena |= (DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_);