OV7670寄存器配置参考-1
废话后面说，先直接上OV7670寄存器的配置部分
const uint8_t OV7670_Reg[][2]=
{
//Frame Rate Adjustment for 24Mhz input clock
//30fps PCLK=24MHz
{0x11, 0x80},//软件应用手册上设置的是0x80，例程设置的是0x00
{0x6b, 0x0a},//PLL控制,软件应用手册上设置的是0x0a,例程设置的是0x40,将PLL调高的话就会产生花屏
{0x2a, 0x00},
{0x2b, 0x00},
{0x92, 0x00},
{0x93, 0x00},
{0x3b, 0x0a},
//Output format
{0x12, 0x14},//QVGA(320*240)、RGB
//RGB555/565 option(must set COM7[2] = 1 and COM7[0] = 0)
{0x40, 0x10},//RGB565,effective only when RGB444[1] is low
{0x8c, 0x00},
//Special effects - 特效
//normal
{0x3a, 0x04},
{0x67, 0xc0},
{0x68, 0x80},
//Mirror/VFlip Enable - 水平镜像/竖直翻转使能
{0x1e, 0x37},//修改配置值将产生图像显示上下或左右颠倒
//Banding Filter Setting for 24Mhz Input Clock - 条纹滤波器
//30fps for 60Hz light frequency
//{0x13, 0xe7},//banding filer enable
//{0x9d, 0x98},//50Hz banding filer
//{0x9e, 0x7f},//60Hz banding filer
//{0xa5, 0x02},//3 step for 50Hz
//{0xab, 0x03},//4 step for 60Hz
//{0x3b, 0x02},//select 60Hz banding filer
//Simple White Balance - 白平衡
//{0x13, 0xe7},//AWB、AGC、AGC Enable and ...
//{0x6f, 0x9f},//simple AWB
//AWBC - 自动白平衡控制(Automatic white balance control)
//{0x43, 0x14},//用户手册里这些寄存器的值都是保留(Reserved),不用设置的呀？
//{0x44, 0xf0},
//{0x45, 0x34},
//{0x46, 0x58},
//{0x47, 0x28},
//{0x48, 0x3a},
//AWB Control
//{0x59, 0x88},//用户手册连寄存器都是保留，初始值都没提供
//{0x5a, 0x88},
//{0x5b, 0x44},
//{0x5c, 0x67},
//{0x5d, 0x49},
//{0x5e, 0x0e},
//AWB Control
//{0x6c, 0x0a},
//{0x6d, 0x55},
//{0x6e, 0x11},
//{0x6f, 0x9f},
//AGC/AEC - Automatic Gain Control自动增益补偿/Automatic exposure Control自动曝光控制
//{0x00, 0x00},
//{0x14, 0x20},
//{0x24, 0x75},
//{0x25, 0x63},
//{0x26, 0xA5},
//AEC algorithm selection - AEC公式选择
//{0xaa, 0x94},//基于平均值的AEC算法Average-based AEC algorithm/基于直方图的AEC算法Histogram-based AEC algorithm
//基于直方图的AGC/AEC的控制
//{0x9f, 0x78},
//{0xa0, 0x68},
//{0xa6, 0xdf},
//{0xa7, 0xdf},
//{0xa8, 0xf0},
//{0xa9, 0x90},
//Fix Gain Control - 固定增益控制
//{0x69, 0x5d},//Fix gain for Gr channel/for Gb channel/for R channel/for B channel
//Color saturation 颜色饱和度 + 0
//{0x4f, 0x80},
//{0x50, 0x80},
//{0x51, 0x00},
//{0x52, 0x22},
//{0x53, 0x5e},
//{0x54, 0x80},
//{0x58, 0x9e},
//Brightness - 亮度 + 0
//{0x55, 0x00},
//Contrast - 对比度 + 0
//{0x56, 0x40},
//Gamma Curve - 伽马曲线
//{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},
//Matrix Coefficient - 色彩矩阵系数
//{0x4f, 0x80},
//{0x50, 0x80},
//{0x51, 0x00},
//{0x52, 0x22},
//{0x53, 0x5e},
//{0x54, 0x80},
//Lens Correction Option - 镜头补偿选项
//{0x62, 0x00},
//{0x63, 0x00},
//{0x64, 0x04},
//{0x65, 0x20},
//{0x66, 0x05},
//{0x94, 0x04},//effective only when LCC5[2] is high
//{0x95, 0x08},//effective only when LCC5[2] is high
//注释这些配置的话，就倾斜显示，并显示多块，这到底是控制什么的？跟时序图有关？
{0x17, 0x16},//行频Horizontal Frame开始高八位(低三位在HREF[2：0])
{0x18, 0x04},//行频Horizontal Frame结束高八位(低三位在HREF[5：3])
{0x19, 0x02},//场频Vertical Frame开始高八位(低二位在VREF[1：0])
{0x1a, 0x7b},//场频Vertical Frame结束高八位(低二位在VREF[3：2])
{0x32, 0x80},//HREF
{0x03, 0x06},//VREF
//注释这个配置的话，就显示花屏了
{0x15, 0x02},//配置PCLK、HREF、VSYNC相关
//Automatic black Level Compensation - 自动黑电平校正
{0xb0, 0x84},//调试时注释这项配置时，颜色显示不正常了，红色练绿色，绿色变红色，但用户手册对这寄存器是保留RSVD
//{0xb1, 0x0c},
//{0xb2, 0x0e},
//{0xb3, 0x82},
//{0xb8, 0x0a},
//SCALING_xx寄存器
//{0x70, 0x00},
//{0x71, 0x00},
//{0x72, 0x11},
//{0x73, 0x08},
//{0x3e, 0x00},
//ADC
//{0x37, 0x1d},//ADC控制ADC Control
//{0x38, 0x71},//ADC和模拟共模控制ADC and Analog Common Mode Control
//{0x39, 0x2a},//ADC偏移控制ADC Offset Control
//零杂的寄存器
//{0x92, 0x00},//空行低八位Dummy Line low 8 bits
//{0xa2, 0x02},//像素时钟延时
//{0x0c, 0x0c},
//{0x10, 0x00},
//{0x0d, 0x01},
//{0x0f, 0x4b},
//{0x3c, 0x78},
//{0x74, 0x19},
//用户手册里这几个寄存器都是保留RSVD
//{0x0e, 0x61},
//{0x16, 0x02},
//{0x21, 0x02},
//{0x22, 0x91},
//{0x29, 0x07},
//{0x33, 0x0b},
//{0x35, 0x0b},
//{0x4d, 0x40},
//{0x4e, 0x20},
//{0x8d, 0x4f},
//{0x8e, 0x00},
//{0x8f, 0x00},
//{0x90, 0x00},
//{0x91, 0x00},
//{0x96, 0x00},
//{0x9a, 0x80},
};
刚开始学OV7670摄像头，我想大家跟我一样心里很毛躁吧，一个模块需要你配置100多个寄存器，但用户手册对寄存器的介绍却草草的一笔带过，自己无从下手啊，只能看开发板给的例程和上网找一些大虾的帖子了。虽然开发板提供的例程好用，但是光用别人的配置不行，怎么也得根据自己实际的需要去修改这些寄存器的配置，
所以就静下心里好好看中英文用户手册和OV7670_software_application_note文档。中文用户手册翻译错误太多，建议看英文的，还有强烈推荐看下OV7670_software_application_note文档，文中简单介绍了针对不同的模式对OV7670寄存器设置。
遇到问题我喜欢化繁为简，挑重点的先解决。看到OV7670寄存器中挺多设置是针对摄像头拍摄图像质量方面的，比如自动白平衡(AWB)、自动曝光控制(AEC)等等，当不知道摄像头拍摄的图片是否能在LCD上正常显示时，你修改这部分配置只能说是做无用功。所以首要任务是让摄像头拍摄的图像能显示在LCD上，我用“//”注释了暂时对于我们来说无关紧要的寄存器配置，100多个寄存器，现在只需要配置20多个，一目了然了吧，如果你的摄像头采集的图像不能在LCD上正常显示，参照用户手册修改这20多项即可，当然得先保证相关的硬件接口正确。后期为了调节图像效果，去掉相应的“//”注释符即可。
最上面的程序对寄存器配置部分就是我参照论坛里wangguanfu大侠提供的配置文件和OV7670_software_application_note文档，自己通过调试归纳总结的，希望能对大家有点帮助吧，大家一起交流，共同进步。附上我参考的PDF文档