5 Replies Latest reply on Mar 19, 2020 7:21 AM by MaOs_1615421

    Reduce required minimal frame blanking period of CX3 GPIF




      I read in multiple threads that the fixed function GPIF of the CX3 requires a ~200us frame blanking period to wrap up the partial DMA buffer associated with the end of a frame. Unfortunately, for our application we need to deal with frame blanking periods that are as small as possible (preferably only a few microseconds). I've read about a solution that makes sure that the DMA buffer size is chosen in a way that the last buffer of a frame is full and the CPU does not need to wrap it up. However, the firmware has to count the buffers then, in order to detect the frame end. Furthermore, I understood that this solutions would require some changes to the GPIF. How can I change the GPIF of the CX3? Does someone already have a working solution for such short frame blanking periods?