NBPF_CHAN_CFG_SDS
(NBPF_CHAN_CFG_SDS & (slave_xfer << 12)) | NBPF_CHAN_CFG_REQD |
hwdesc->config = NBPF_CHAN_CFG_DAD | (NBPF_CHAN_CFG_SDS & (mem_xfer << 12)) |
(NBPF_CHAN_CFG_SDS & (mem_xfer << 12)) |