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PPI receive only 12.5fps instead of 25fps

Question asked by YuSong on May 6, 2010

Hi,

  I use the PPI device driver to receive CCIT-656 video stream(PAL), but I can only get 12.5fps instead of 25fps, the IC is BF531.

The code is changed from VideoEcho example, I change the InboundConfigurationTable as following:

ADI_DEV_CMD_VALUE_PAIR InboundConfigurationTable [] = {
        { ADI_DEV_CMD_SET_DATAFLOW_METHOD,         (void *)ADI_DEV_MODE_CHAINED_LOOPBACK    },

        { ADI_DEV_CMD_SET_STREAMING,         (void  *)TRUE    },
        { ADI_PPI_CMD_SET_CONTROL_REG,             (void *)0x0080                    },
        { ADI_PPI_CMD_SET_LINES_PER_FRAME_REG,    (void *)ADI_ITU656_PAL_HEIGHT    },
        { ADI_DEV_CMD_END,                        NULL                            },
};

 

Is there any something wrong?

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