ADMA_CH_LOWER_SRC_ADDR
tdma_ch_write(tdc, ADMA_CH_LOWER_SRC_ADDR - tdc->tdma->cdata->ch_tc_offset_diff,
ch_reg->src_addr = tdma_ch_read(tdc, ADMA_CH_LOWER_SRC_ADDR -
tdma_ch_write(tdc, ADMA_CH_LOWER_SRC_ADDR - tdma->cdata->ch_tc_offset_diff,