SPI DMA control register
| IN_RST | The bit is used to reset in dma fsm and in data fifo pointer. |
| OUT_RST | The bit is used to reset out dma fsm and out data fifo pointer. |
| AHBM_FIFO_RST | Reset spi dma ahb master fifo pointer. |
| AHBM_RST | Reset spi dma ahb master. |
| IN_LOOP_TEST | Set bit to test in link. |
| OUT_LOOP_TEST | Set bit to test out link. |
| OUT_AUTO_WRBACK | when the bit is set, DMA continue to use the next inlink node when the length of inlink is 0. |
| OUT_EOF_MODE | out eof flag generation mode . 1: when dma pop all data from fifo 0:when ahb push all data to fifo. |
| OUTDSCR_BURST_EN | read descriptor use burst mode when read data for memory. |
| INDSCR_BURST_EN | read descriptor use burst mode when write data to memory. |
| OUT_DATA_BURST_EN | spi dma read data from memory in burst mode. |
| MEM_TRANS_EN | 1: Internal memory data transfer enable bit. Send SPI DMA RX buffer data to SPI DMA TX buffer. 0: Disable this function. |
| DMA_RX_STOP | spi dma read data stop when in continue tx/rx mode. |
| DMA_TX_STOP | spi dma write data stop when in continue tx/rx mode. |
| DMA_CONTINUE | spi dma continue tx/rx data. |
| SLV_LAST_SEG_POP_CLR | 1: Clear spi_slv_seg_frt_pop_mask. 0 : others |
| DMA_SLV_SEG_TRANS_EN | Enable dma segment transfer in spi dma half slave mode. 1: enable. 0: disable. |
| SLV_RX_SEG_TRANS_CLR_EN | 1: spi_dma_infifo_full_vld is cleared by spi slave CMD5. 0: spi_dma_infifo_full_vld is cleared by SPI_TRANS_DONE. |
| SLV_TX_SEG_TRANS_CLR_EN | 1: spi_dma_outfifo_empty_vld is cleared by spi slave CMD6. 0: spi_dma_outfifo_empty_vld is cleared by SPI_TRANS_DONE. |
| RX_EOF_EN | 1: SPI_IN_SUC_EOF_INT_RAW is set when the number of dma pushed data bytes is equal to the value of SPI_SLV_DMA_RD_BYTELEN[19:0]/ SPI_MST_DMA_RD_BYTELEN[19:0] in spi dma transition. 0: SPI_IN_SUC_EOF_INT_RAW is set by SPI_TRANS_DONE in non-seg-trans or SPI_DMA_SEG_TRANS_DONE in seg-trans. |
| DMA_INFIFO_FULL_CLR | 1:Clear spi_dma_infifo_full_vld. 0: Do not control it. |
| DMA_OUTFIFO_EMPTY_CLR | 1:Clear spi_dma_outfifo_empty_vld. 0: Do not control it. |
| EXT_MEM_BK_SIZE | Select the external memory block size. |
| DMA_SEG_TRANS_CLR | 1: End slave seg-trans, which acts as 0x05 command. 2 or more end seg-trans signals will induce error in DMA RX. 0: others. Will be cleared in 1 APB CLK cycles by hardware… |