1/4的摄像头屏幕

zcd1992

看过一些帖子，设置了

{0x3e, 0x1A},//{0x3e, 0x00},//10   //

{0x70, 0x00},

{0x71, 0x01},

{0x72, 0x22},//{0x72, 0x11}, //

{0x73, 0x0B},//{0x73, 0x09},// //

可以出来1/8的图像，但是对于3E不知道怎么设置，PCLK要怎么分频才好，我试了四分频还有八分频都可以，采用的是YUV的格式

出来的图像有条纹，另外图像里要隔点采集才能出图像，这是什么问题呢。。
下面上代码，出来的图像有条纹，不知道为什么。。

#ifndef _OV7670CFG_H

#define _OV7670CFG_H

#include "ov7670.h"

//////////////////////////////////////////////////////////////////////////////////  

//本程序参考自网友guanfu_wang代码。

//ALIENTEK战舰STM32开发板

//OV7670 驱动代码   

//正点原子@ALIENTEK

//技术论坛:www.openedv.com

//修改日期:2012/9/14

//版本：V1.0          

//////////////////////////////////////////////////////////////////////////////////

  

//初始化寄存器序列及其对应的值

const u8 ov7670_init_reg_tbl[][2]= 

{   

     /*以下为OV7670 QVGA RGB565参数  */

// {0x3a, 0x04},

// {0x40, 0x10},

// {0x12, 0x14},//QVGA,RGB输出

{0x12, 0x10},//QVGA  YUV

{0x3a, 0x14},//使用固定UV输出

{0x3d, 0x80},//使用固定UV输出

{0x67, 0x11},//固定U值，0x11，方便测试

{0x68, 0xFF},//固定V值，0xFF，方便测试        

{0x40, 0xC0},//初始配YUV模式，这个寄存器必须设置，否则不好使

//输出窗口设置

{0x32, 0x24},

{0x17, 0x16},   //180      

{0x18, 0x04},//5//36

{0x19, 0x02},

{0x1a, 0x7a},//0x7a,

  {0x03, 0x0a},//0x0a,

{0x0c, 0x0c},

{0x15, 0x00},

{0x3e, 0x1A},//{0x3e, 0x00},//10   //

{0x70, 0x00},

{0x71, 0x01},

{0x72, 0x22},//{0x72, 0x11}, //

{0x73, 0x0B},//{0x73, 0x09},// //

        

{0xa2, 0x02},//15

{0x11, 0x00},//时钟分频设置,0,不分频.

{0x7a, 0x20},

{0x7b, 0x1c}, //

{0x7c, 0x28}, //

        

{0x7d, 0x3c},//20 //

{0x7e, 0x55},

{0x7f, 0x68},

{0x80, 0x76},

{0x81, 0x80},

        

{0x82, 0x88},

{0x83, 0x8f},

{0x84, 0x96},

{0x85, 0xa3},

{0x86, 0xaf},

        

{0x87, 0xc4},//30

{0x88, 0xd7},

{0x89, 0xe8},

{0x13, 0xe0},

{0x00, 0x00},//AGC

        

{0x10, 0x00},

{0x0d, 0x00}, 

{0x14, 0x20},//0x38, limit the max gain

{0xa5, 0x05},

{0xab, 0x07},

        

{0x24, 0x75},//40

{0x25, 0x63},

{0x26, 0xA5},

{0x9f, 0x78},

{0xa0, 0x68},

        

{0xa1, 0x03},//0x0b,

{0xa6, 0xdf},//0xd8,

{0xa7, 0xdf},//0xd8,

{0xa8, 0xf0},

{0xa9, 0x90},

        

{0xaa, 0x94},//50

{0x13, 0xe5},

{0x0e, 0x61},

{0x0f, 0x4b},

{0x16, 0x02},

        

{0x1e, 0x27},//图像输出镜像控制.0x07,

{0x21, 0x02},

{0x22, 0x91},

{0x29, 0x07},

{0x33, 0x0b},

        

{0x35, 0x0b},//60

{0x37, 0x1d},

{0x38, 0x71},

{0x39, 0x2a},

{0x3c, 0x78},

        

{0x4d, 0x40},

{0x4e, 0x20},

{0x69, 0x5d},

{0x6b, 0x40},//PLL*4=48Mhz //

{0x74, 0x19},

{0x8d, 0x4f},

        

{0x8e, 0x00},//70

{0x8f, 0x00},

{0x90, 0x00},

{0x91, 0x00},

{0x92, 0x00},//0x19,//0x66

        

{0x96, 0x00},

{0x9a, 0x80},

{0xb0, 0x84},

{0xb1, 0x0c},

{0xb2, 0x0e},

        

{0xb3, 0x82},//80

{0xb8, 0x0a},

{0x43, 0x14},

{0x44, 0xf0},

{0x45, 0x34},

        

{0x46, 0x58}, 

{0x47, 0x28},

{0x48, 0x3a},

{0x59, 0x88},

{0x5a, 0x88},

        

{0x5b, 0x44},//90

{0x5c, 0x67},

{0x5d, 0x49},

{0x5e, 0x0e},

{0x64, 0x04},

{0x65, 0x20},

        

{0x66, 0x05},

{0x94, 0x04},

{0x95, 0x08},

{0x6c, 0x0a},

{0x6d, 0x55},

        

        

{0x4f, 0x80},

{0x50, 0x80},

{0x51, 0x00},

{0x52, 0x22},

{0x53, 0x5e},

{0x54, 0x80},

        

{0x09, 0x03},//驱动能力最大

{0x6e, 0x11},//100

{0x6f, 0x9f},//0x9e for advance AWB

    {0x55, 0x00},//亮度

    {0x56, 0x40},//对比度

    {0x57, 0x80},//0x40,  change according to Jim's request

}; 

#endif


主程序

void camera_refresh(void)

{

u32 i,j;

  u16 color;

if(ov_sta==2)

{

LCD_WriteReg(0x0050,0); 

LCD_WriteReg(0x0051,59); //x

LCD_WriteReg(0x0052,0); 

LCD_WriteReg(0x0053,79); //y

LCD_Scan_Dir(U2D_L2R); //从上到下,从左到右

LCD_SetCursor(0,0); //设置光标位置 

LCD_WriteRAM_Prepare();     //开始写入GRAM

OV7670_RRST=0; //开始复位读指针 

OV7670_RCK=0;

OV7670_RCK=1;

OV7670_RCK=0;

OV7670_RRST=1; //复位读指针结束 

OV7670_RCK=1;

for(i=0;i<60;i++)

{

for(j=0;j<80;j++) //读取图像数据

{

OV7670_RCK=0;

color=OV7670_DATA; //读数据

OV7670_RCK=1; 

color<<=8;  

OV7670_RCK=0;

color|=OV7670_DATA; //读数据

OV7670_RCK=1;

pix[j]=color >>11; //0~31

// pix[j]=pix[j]/16*16;

LCD->LCD_RAM=(pix[j]<<11)|(pix[j]<<6)|pix[j];

// LCD->LCD_RAM=color;

OV7670_RCK=0;

OV7670_RCK=1; 

OV7670_RCK=0;

OV7670_RCK=1;

}

}

EXTI->R=1<<0;     //清除LINE0上的中断标志位

ov_sta=0; //开始下一次采集

LCD_Scan_Dir(DFT_SCAN_DIR); //恢复默认扫描方向 

}  

}

正点原子

这东西只能慢慢调,比较郁闷...