Forum Post: Dark frame subtraction

  hi,we are working on IPNC3.5 now. Data flow path is memory-to-memory mode,that means data flow like blow:

        raw -> ipipeif -> isif -> ddr,

        ddr -> ipipeif -> ipipe -> rsz ->ddr.

       we set IPIPEIF_CFG1 = 0x405,INPSRC1 = 0(Video Port),INPSRC2=1(SDRAM RAW)

      because ipipeif don't receive frame from isif( just from sdram),so I think if we want to enable Dark Frame Subtraction,we should set INPSRC1 = 2 ,let VP - BL,but this stops RSZ_DMA_INT !

      Do we need to capture dark frame manually and set dark frame address to IPIPEIF_ADDRU and IPIPEIF_ADDRU?