RT,最近在使用DM642做视频采集与显示,可是发现有的时候上电之后,采集的视频奇偶场是反的,出现的概率10次上电,至少有一次是反的。VP口的场判断是通过EAV判断的。改用外部控制信号之后还是会反。
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你好,
DM642采集是否有field状态寄存器,可以判断当前场是奇场还是偶场?如果有,你是否是在VD中断里面根据相关状态来修改输出buffer的地址的?