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DM642+TV5150做视频采集实验遇到如下问题



开发板通过CVBS接口与电视机连接。
1.CCS仿真时TV能正常显示实时视频画面;
2.将程序写到Flash后,TV没有实时画面出来;
3.为验证flash正常否,通过测试程序测试结果正常,然后烧了一个LED控制程序进去,LED也能按预期闪烁;
总结下问题,CCS仿真时TV有实画面,通过EMIFA启动后无实时画面显示.
求指点!不胜感激......