先贴个图让大家看看  图片是我的一只手。

先申明一下  我的LCD驱动是没问题的，用OV7670是显示正常的，都采用的是YUV422  BT656   y、cb、cr分3段单独保存，图片大小640*480
上图是使用OV7725时的图片，可以看到图片是斜的，很显然是被拉伸了，而且被分成了3段。
本来图片的左上角、中间、右下角  这3个部分可以拼成一个完整的图片（不是矩形，是个平行四边形）
现在是  手指尖跑到了左上角  手掌在中间  手臂在右下角   


下面是我ov7725的配置
        {0x12,0x80},

             {0x3d, 0x03},

        //VGA        
        {0x17, 0x22},//0x22
        {0x18, 0xa4},
        {0x19, 0x07},//0x07
        {0x1a, 0xf0},
        {0x32, 0x00},
        
        {0x29, 0xa0},
        {0x2c, 0xf0},
        {0x2a, 0x00},
        {0x11, 0x01},
        //DSP control
        {0x42, 0x7f},
        {0x4d, 0x09},
    {0x63, 0xe0},
        {0x64, 0xff},
        {0x65, 0x20},
        {0x66, 0x00},
        {0x67, 0x48},
        //AGC AEC AWB
        {0x13, 0xf0},
        {0x0d, 0x41},
        {0x0f, 0xc5},
        {0x14, 0x11},
        {0x22, 0x7f},
        {0x23, 0x03},
        {0x24, 0x40},        
        {0x25, 0x30},
        {0x26, 0xa1},
        {0x2b, 0x00},
        {0x6b, 0xaa},
        {0x13, 0xff},
        //matrix sharpness brightness contrast UV
        {0x90, 0x05},
        {0x91, 0x01},        
        {0x92, 0x03},
        {0x93, 0x00},
        {0x94, 0xb0},
        {0x95, 0x9d},
        {0x96, 0x13},
        {0x97, 0x16},
        {0x98, 0x7b},        
        {0x99, 0x91},
        {0x9a, 0x1e},
        {0x9b, 0x08},
        {0x9c, 0x20},
        {0x9e, 0x81},
        {0xa6, 0x04},//04
        //gamma
        {0x7e, 0x0c},
        {0x7f, 0x16},
        {0x80, 0x2a},
        {0x81, 0x4e},
        {0x82, 0x61},
        {0x83, 0x6f},
        {0x84, 0x7b},        
        {0x85, 0x86},
        {0x86, 0x8e},
        {0x87, 0x97},
        {0x88, 0xa4},
        {0x89, 0xaf},
        {0x8a, 0xc5},
        {0x8b, 0xd7},        
        {0x8c, 0xe8},
        {0x8d, 0x20},
        {0x0e, 0x65},

几天了，都没找到问题，我换了2个ov7725都还是一样的，有谁调过ov7725的 交流交流啊

去52rd论坛发帖试试
http://www.52rd.com/bbs/Index.htm这边很多做OV sensor的