OV7670颜色问题
最近在调试OV7670，成功驱动ov7670，但是感觉出来的景物大致颜色是对的，就是会出现以下的症状，希望大侠们看一下。彩条不知道出来的对不对，嘴哪里有轻微的彩条，什么原因呢？
代码如下，网上好多版本都大同小异，谁能告诉我那里有问题呢？datasheet 都看了好多遍了，就是出来的图像感觉不清晰。
constchar change_reg=
{
{0x3a, 0x04},
{0x40, 0xd0},
{0x12, 0x14},
{0x32, 0x80},
{0x17, 0x16},
{0x18, 0x04},
{0x19, 0x02},
{0x1a, 0x7b},//0x7a,
{0x03, 0x06},//0x0a,
{0x0c, 0x00},
{0x3e, 0x00},//
{0x70, 0x00},
{0x71, 0x81},
{0x72, 0x11},
{0x73, 0x00},//
{0xa2, 0x02},
{0x11, 0x81},
{0x7a, 0x20},
{0x7b, 0x1c},
{0x7c, 0x28},
{0x7d, 0x3c},
{0x7e, 0x55},
{0x7f, 0x68},
{0x80, 0x76},
{0x81, 0x80},
{0x82, 0x88},
{0x83, 0x8f},
{0x84, 0x96},
{0x85, 0xa3},
{0x86, 0xaf},
{0x87, 0xc4},
{0x88, 0xd7},
{0x89, 0xe8},
{0x13, 0xe0},
{0x00, 0x00},//AGC
{0x10, 0x00},
{0x0d, 0x00},
{0x14, 0x28},//0x38, limit the max gain
{0xa5, 0x05},
{0xab, 0x07},
{0x24, 0x75},
{0x25, 0x63},
{0x26, 0xA5},
{0x9f, 0x78},
{0xa0, 0x68},
{0xa1, 0x03},//0x0b,
{0xa6, 0xdf},//0xd8,
{0xa7, 0xdf},//0xd8,
{0xa8, 0xf0},
{0xa9, 0x90},
{0xaa, 0x94},
{0x13, 0xe5},
{0x0e, 0x61},
{0x0f, 0x4b},
{0x16, 0x02},
{0x1e, 0x07},//0x07,
{0x21, 0x02},
{0x22, 0x91},
{0x29, 0x07},
{0x33, 0x0b},
{0x35, 0x0b},
{0x37, 0x1d},
{0x38, 0x71},
{0x39, 0x2a},
{0x3c, 0x78},
{0x4d, 0x40},
{0x4e, 0x20},
{0x69, 0x55},
{0x6b, 0x40},//PLL
{0x74, 0x19},
{0x8d, 0x4f},
{0x8e, 0x00},
{0x8f, 0x00},
{0x90, 0x00},
{0x91, 0x00},
{0x92, 0x00},//0x19,//0x66
{0x96, 0x00},
{0x9a, 0x80},
{0xb0, 0x84},
{0xb1, 0x0c},
{0xb2, 0x0e},
{0xb3, 0x82},
{0xb8, 0x0a},
{0x43, 0x14},
{0x44, 0xf0},
{0x45, 0x34},
{0x46, 0x58},
{0x47, 0x28},
{0x48, 0x3a},
{0x59, 0x88},
{0x5a, 0x88},
{0x5b, 0x44},
{0x5c, 0x67},
{0x5d, 0x49},
{0x5e, 0x0e},
{0x64, 0x04},
{0x65, 0x20},
{0x66, 0x05},
{0x94, 0x04},
{0x95, 0x08},
{0x6c, 0x0a},
{0x6d, 0x55},
{0x6e, 0x11},
{0x6f, 0x9f},//0x9e for advance AWB
{0x6a, 0x40},
{0x01, 0x40},
{0x02, 0x40},
{0x13, 0xe7},
{0x15, 0x00},
{0x4f, 0x80},
{0x50, 0x80},
{0x51, 0x00},
{0x52, 0x22},
{0x53, 0x5e},
{0x54, 0x80},
{0x55, 0x0A},//亮度
{0x56, 0x4A},//对比度
{0x58, 0x9e},
{0x41, 0x08},
{0x3f, 0x05},//边缘增强调整
{0x75, 0x05},
{0x76, 0xe1},
{0x4c, 0x0F},//噪声抑制强度
{0x77, 0x0a},
{0x3d, 0xc2}, //0xc0,
{0x4b, 0x09},
{0xc9, 0x60},
{0x41, 0x38},
{0x56, 0x40},//0x40,change according to Jim's request
{0x34, 0x11},
{0x3b, 0x02},//0x00,//0x02,
{0xa4, 0x89},//0x88,
{0x96, 0x00},
{0x97, 0x30},
{0x98, 0x20},
{0x99, 0x30},
{0x9a, 0x84},
{0x9b, 0x29},
{0x9c, 0x03},
{0x9d, 0x4c},
{0x9e, 0x3f},
{0x78, 0x04},
{0x79, 0x01},
{0xc8, 0xf0},
{0x79, 0x0f},
{0xc8, 0x00},
{0x79, 0x10},
{0xc8, 0x7e},
{0x79, 0x0a},
{0xc8, 0x80},
{0x79, 0x0b},
{0xc8, 0x01},
{0x79, 0x0c},
{0xc8, 0x0f},
{0x79, 0x0d},
{0xc8, 0x20},
{0x79, 0x09},
{0xc8, 0x80},
{0x79, 0x02},
{0xc8, 0xc0},
{0x79, 0x03},
{0xc8, 0x40},
{0x79, 0x05},
{0xc8, 0x30},
{0x79, 0x26},
{0x09, 0x02},
{0x3b, 0x42},//0x82,//0xc0,//0xc2, //night mode
}; 我的 边沿彩条，复位 一下 就没了。
可能时序对齐不好。 chunk999 发表于 2012-7-1 11:32 static/image/common/back.gif
我的 边沿彩条，复位 一下 就没了。
可能时序对齐不好。
应该是摄像头的时序是吧。tft控制器的时序没有问题，但会不会是摄像头廉价了，效果不好呢。既然颜色大部分都对，轮廓也对，为什么是时序方面的呢？我觉得要么是摄像头的问题，要么就是寄存器的配置问题。 本帖最后由 chunk999 于 2012-7-2 09:00 编辑
时钟与数据 相位对其不好。就像印刷套色错乱。
我的FPGA有PLL，调整相位很容易。
另外 关掉 边沿 增强试试 视频数据的延迟对后端/基带芯片的时序设计是非常危险的。如果这个延迟超过了后端/
基带芯片的允许范围，后端/基带芯片会得不到正确的视频数据，不正确的视频数据会使得
到的图像颜色不对，有固定或滚动的横条纹。 OV7670 模组有两个时钟信号。一个是主时钟 （输入）XCLK，另一个是模组输出的
像素时钟PCLK。一些后端/基带芯片可能用XCLK 作为采样时钟，一些后端/基带芯片有可
能用PCLK 作为采样时钟，因为PCLK 的相位和XCLK 的相位是不同的，一般不允许用
XCLK 来采样图像数据。 请问，为什么你的彩色检测这么好啊，能交流下吗？我的彩色检测第一颜色不对，第二显示倾斜，第三重复显示啊 hunningtu 发表于 2012-6-30 13:45 static/image/common/back.gif
代码如下，网上好多版本都大同小异，谁能告诉我那里有问题呢？datasheet 都看了好多遍了，就是出来的图像感 ...
谁能解释一下，寄存器这么配置是肿么个意思？
{0x78, 0x04},
{0x79, 0x01},
{0xc8, 0xf0},
{0x79, 0x0f},
{0xc8, 0x00},
{0x79, 0x10},
{0xc8, 0x7e},
{0x79, 0x0a},
{0xc8, 0x80},
{0x79, 0x0b},
{0xc8, 0x01},
{0x79, 0x0c},
{0xc8, 0x0f},
{0x79, 0x0d},
{0xc8, 0x20},
{0x79, 0x09},
{0xc8, 0x80},
{0x79, 0x02},
{0xc8, 0xc0},
{0x79, 0x03},
{0xc8, 0x40},
{0x79, 0x05},
{0xc8, 0x30},
{0x79, 0x26},
就是2楼斑竹的寄存器。。。。。。。。。。 heyangfengyue 发表于 2013-9-4 23:27 static/image/common/back.gif
谁能解释一下，寄存器这么配置是肿么个意思？
{0x78, 0x04},
{0x79, 0x01},
这个看数据手册吧，都是上班族，没时间一点一点写注释了。
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