ov7670寄存器note.docx

废话后面说，先直接上OV7670寄存器的配置部分constuint8_tOV7670_Reg2=/FrameRateAdjustmentfor24Mhzinputclock/30fpsPCLK=24MHz0x11,0x80,/软件应用手册上设置的是0x80，例程设置的是0x000x6b,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/Outputformat0x12,0x14,/QVGA(320*240)、RGB/RGB555/565option(mustsetCOM72=1andCOM70=0)0x40,0x10,/RGB565,effectiveonlywhenRGB4441islow0x8c,0x00,/Specialeffects-特效/normal0x3a,0x04,0x67,0xc0,0x68,0x80,/Mirror/VFlipEnable-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/BandingFilterSettingfor24MhzInputClock-条纹滤波器/30fpsfor60Hzlightfrequency/0x13,0xe7,/bandingfilerenable/0x9d,0x98,/50Hzbandingfiler/0x9e,0x7f,/60Hzbandingfiler/0xa5,0x02,/3stepfor50Hz/0xab,0x03,/4stepfor60Hz/0x3b,0x02,/select60Hzbandingfiler/SimpleWhiteBalance-白平衡/0x13,0xe7,/AWB、AGC、AGCEnableand./0x6f,0x9f,/simpleAWB/AWBC-自动白平衡控制(Automaticwhitebalancecontrol)/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,/AWBControl/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,/AWBControl/0x6c,0x0a,/0x6d,0x55,/0x6e,0x11,/0x6f,0x9f,/AGC/AEC-AutomaticGainControl自动增益补偿/AutomaticexposureControl自动曝光控制/0x00,0x00,/0x14,0x20,/0x24,0x75,/0x25,0x63,/0x26,0xA5,/AECalgorithmselection-AEC公式选择/0xaa,0x94,/基于平均值的AEC算法Average-basedAECalgorithm/基于直方图的AEC算法Histogram-basedAECalgorithm/基于直方图的AGC/AEC的控制/0x9f,0x78,/0xa0,0x68,/0xa6,0xdf,/0xa7,0xdf,/0xa8,0xf0,/0xa9,0x90,/FixGainControl-固定增益控制/0x69,0x5d,/FixgainforGrchannel/forGbchannel/forRchannel/forBchannel/Colorsaturation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,/GammaCurve-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,/MatrixCoefficient-色彩矩阵系数/0x4f,0x80,/0x50,0x80,/0x51,0x00,/0x52,0x22,/0x53,0x5e,/0x54,0x80,/LensCorrectionOption-镜头补偿选项/0x62,0x00,/0x63,0x00,/0x64,0x04,/0x65,0x20,/0x66,0x05,/0x94,0x04,/effectiveonlywhenLCC52ishigh/0x95,0x08,/effectiveonlywhenLCC52ishigh/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HorizontalFrame开始高八位(低三位在HREF2：0)0x18,0x04,/行频HorizontalFrame结束高八位(低三位在HREF5：3)0x19,0x02,/场频VerticalFrame开始高八位(低二位在VREF1：0)0x1a,0x7b,/场频VerticalFrame结束高八位(低二位在VREF3：2)0x32,0x80,/HREF0x03,0x06,/VREF/注释这个配置的话，就显示花屏了0x15,0x02,/配置PCLK、HREF、VSYNC相关/AutomaticblackLevelCompensation-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ADCControl/0x38,0x71,/ADC和模拟共模控制ADCandAnalogCommonModeControl/0x39,0x2a,/ADC偏移控制ADCOffsetControl/零杂的寄存器/0x92,0x00,/空行低八位DummyLinelow8bits/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