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DM6437 PSP_BIOS驱动问题,FVID_exchange()失败

Other Parts Discussed in Thread: TVP5158

我使用psp_1_00_02_00做两路视频采集,前端参量配置不能配置成场模式(FVID_FIELD_MODE),配置成帧模式FVID_FRAME_MODE,程序运行到FVID_exchange()处失败。在FVID_exchange之前FVID_queue ,FVID_allocBuffer 都已成功。请问这是什么原因呢? 前端参量配置如下:

static  PSP_VPFECcdcConfigParams ccdcParams =

{

    FVID_CCDC_YCBCR_8,               /* dataFlow     */

    FVID_FRAME_MODE,                   /* ffMode       */

   1250,                                /* height      

   736,                               /* width        */

   (736*2),                           /* pitch        */

   0,                                  /* horzStartPix */

   0,                                  /* vertStartPix */

   NULL,                               /* appCallback  */

   {

       PSP_VPFE_TVP5158_Open,         /* extVD Fxn    */

       PSP_VPFE_TVP5158_Close,

       PSP_VPFE_TVP5158_Control,

   },

   0,                                   /*segId         */

}