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[讨论] OV2640出现行条纹

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发表于 2009-7-21 16:36:00 | 显示全部楼层 |阅读模式
我在调试OV2640(640*480)时发现图像在HSYNC方向上出现很多条纹,好像在下雨一样。调节输出频率(0x11寄存器),把频率调得很低有一点帮助,但依然很多条纹。调节0x9 驱动能力没什么帮助,现在不知道是软件问题还是硬件问题,请大家指点一下。[upload=jpg]UploadFile/2009-7/09721@52RD_001.jpg[/upload]
 楼主| 发表于 2009-7-21 16:42:32 | 显示全部楼层
把我初始化2640 640*480的设置公布一下,是先UXGA然后再640*480的,哪位有硬件的朋友帮忙试一下是不是设置的问题。

static U8 OV2640UXGA_INIT[500]={

0xff,0x0,0xff,
0x2c,0xff,0xff,
0x2e,0xdf,0xff,
0xff,0x1,0xff,
0x3c,0x32,0xff,
0x11,0x01,0xff,//
0x9,0x3,0xff,
0x4,0x28,0xff,
0x13,0xe5,0xff,//e5
0x14,0x48,0xff,
0x2c,0x0c,0xff,
0x33,0x78,0xff,
0x3a,0x33,0xff,
0x3b,0xfB,0xff,
0x3e,0x0,0xff,
0x43,0x11,0xff,
0x16,0x10,0xff,
0x39,0x82,0xff,
0x35,0x88,0xff,
0x22,0x0a,0xff,
0x37,0x40,0xff,
0x23,0x0,0xff,
0x34,0xa0,0xff,
0x36,0x1a,0xff,
0x6,0x2,0xff,
0x7,0xc0,0xff,
0x0d,0xb7,0xff,
0x0e,0x1,0xff,
0x4c,0x0,0xff,
0x4a,0x81,0xff,
0x21,0x99,0xff,
0x24,0x40,0xff,
0x25,0x38,0xff,
0x26,0x82,0xff,
0x5c,0x0,0xff,
0x63,0x0,0xff,
0x46,0x3f,0xff,
0x0c,0x3c,0xff,
0x61,0x70,0xff,
0x62,0x80,0xff,
0x7c,0x5,0xff,
0x20,0x80,0xff,
0x28,0x30,0xff,
0x6c,0x0,0xff,
0x6d,0x80,0xff,
0x6e,0x0,0xff,
0x70,0x2,0xff,
0x71,0x94,0xff,
0x73,0xc1,0xff,
0x3d,0x34,0xff,
0x5a,0x57,0xff,
0x4f,0xbb,0xff,
0x50,0x9c,0xff,
0xff,0x0,0xff,
0xe5,0x7f,0xff,
0xf9,0xc0,0xff,
0x41,0x24,0xff,
0xe0,0x14,0xff,
0x76,0xff,0xff,
0x33,0xa0,0xff,
0x42,0x20,0xff,
0x43,0x18,0xff,
0x4c,0x0,0xff,
0x87,0xd0,0xff,
0x88,0x3f,0xff,
0xd7,0x3,0xff,
0xd9,0x10,0xff,
0xd3,0x82,0xff,
0xc8,0x8,0xff,
0xc9,0x80,0xff,
0x7c,0x0,0xff,
0x7d,0x0,0xff,
0x7c,0x3,0xff,
0x7d,0x48,0xff,
0x7d,0x48,0xff,
0x7c,0x8,0xff,
0x7d,0x20,0xff,
0x7d,0x10,0xff,
0x7d,0x0e,0xff,
0x90,0x0,0xff,
0x91,0x0e,0xff,
0x91,0x1a,0xff,
0x91,0x31,0xff,
0x91,0x5a,0xff,
0x91,0x69,0xff,
0x91,0x75,0xff,
0x91,0x7e,0xff,
0x91,0x88,0xff,
0x91,0x8f,0xff,
0x91,0x96,0xff,
0x91,0xa3,0xff,
0x91,0xaf,0xff,
0x91,0xc4,0xff,
0x91,0xd7,0xff,
0x91,0xe8,0xff,
0x91,0x20,0xff,
0x92,0x0,0xff,
0x93,0x6,0xff,
0x93,0xe3,0xff,
0x93,0x5,0xff,
0x93,0x5,0xff,
0x93,0x0,0xff,
0x93,0x4,0xff,
0x93,0x0,0xff,
0x93,0x0,0xff,
0x93,0x0,0xff,
0x93,0x0,0xff,
0x93,0x0,0xff,
0x93,0x0,0xff,
0x93,0x0,0xff,
0x96,0x0,0xff,
0x97,0x8,0xff,
0x97,0x19,0xff,
0x97,0x2,0xff,
0x97,0x0c,0xff,
0x97,0x24,0xff,
0x97,0x30,0xff,
0x97,0x28,0xff,
0x97,0x26,0xff,
0x97,0x2,0xff,
0x97,0x98,0xff,
0x97,0x80,0xff,
0x97,0x0,0xff,
0x97,0x0,0xff,
0xc3,0xed,0xff,
0xc4,0x9a,0xff,
0xa4,0x0,0xff,
0xa8,0x0,0xff,
0xc5,0x11,0xff,
0xc6,0x51,0xff,
0xbf,0x80,0xff,
0xc7,0x10,0xff,
0xb6,0x66,0xff,
0xb8,0xA5,0xff,
0xb7,0x64,0xff,
0xb9,0x7C,0xff,
0xb3,0xaf,0xff,
0xb4,0x97,0xff,
0xb5,0xFF,0xff,
0xb0,0xC5,0xff,
0xb1,0x94,0xff,
0xb2,0x0f,0xff,
0xc4,0x5c,0xff,
0xc0,0xc8,0xff,
0xc1,0x96,0xff,
0x86,0x3d,0xff,
0x50,0x0,0xff,
0x51,0x90,0xff,
0x52,0x2c,0xff,
0x53,0x0,0xff,
0x54,0x0,0xff,
0x55,0x88,0xff,
0x57,0x0,0xff,
0x5a,0x90,0xff,
0x5b,0x2c,0xff,
0x5c,0x5,0xff,
0xc3,0xed,0xff,
0x7f,0x0,0xff,
0xda,0x0,0xff,
0xe5,0x1f,0xff,
0xe1,0x67,0xff,
0xe0,0x0,0xff,
0xdd,0x7f,0xff,
0x5,0x0,0xff,
0x0,0x0,0x0,
};

static U8 OV2640_640_480_init[200]={
0xff,0x1,0xff,
0x17,0x11,0xff,
0x18,0x75,0xff,
0x19,0x0,0xff,
0x1a,0x97,0xff,
0x32,0x36,0xff,
0x4f,0xbb,0xff,
0x50,0x9c,0xff,
0x6d,0x80,0xff,
0x3d,0x34,0xff,
0x39,0x2,0xff,
0x35,0x88,0xff,
0x22,0x0a,0xff,
0x37,0x40,0xff,
0x23,0x0,0xff,
0x34,0xa0,0xff,
0x36,0x1a,0xff,
0x6,0x2,0xff,
0x7,0xc0,0xff,
0x0d,0xb7,0xff,
0x0e,0x1,0xff,
0x4c,0x0,0xff,
//0x11,0x3f,0xff,///////////

0xff,0x0,0xff,
0xc0,0xC8,0xff,
0xc1,0x96,0xff,
0x8c,0x0,0xff,
0x86,0x3D,0xff,
0x50,0x89,0xff,
0x51,0x90,0xff,
0x52,0x2C,0xff,
0x53,0x0,0xff,
0x54,0x0,0xff,
0x55,0x88,0xff,
0x5a,0xA0,0xff,//0xa0*4=640
0x5b,0x78,0xff,//0x78*4=480
0x5c,0x0,0xff,
0xd3,0x4,0xff,
0x0,0x0,0x0,
};
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 楼主| 发表于 2009-7-21 16:45:33 | 显示全部楼层
输出格式是YUV的,我只取了Y分量还原成黑白图片。
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 楼主| 发表于 2009-7-22 09:35:32 | 显示全部楼层
有没哪位兄弟有硬件的啊,把这些设置写进去试一下,现在还不确定是软件还是硬件问题
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发表于 2009-7-22 10:21:58 | 显示全部楼层
2640 和 3640 我都调试过。

你这种横条纹的现象 100% 是硬件问题;

你让硬件帮你量量各路供电电压是否稳定,另外还要注意对照 datasheet 是否满足电气要求的IO驱动能力;
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 楼主| 发表于 2009-7-22 14:46:17 | 显示全部楼层
现在已经确定是电源的问题了,我在每个电源都并上了一个大电容,条纹消失了。现在我是用CPU的I/O采集的,效果很好,但是如果用2440的CAMERA接口采集就会出现有些像点不能更新的现象,哪位有这方面的使用经验,麻烦指导一下。
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 楼主| 发表于 2009-7-22 14:49:12 | 显示全部楼层
[upload=jpg]UploadFile/2009-7/09722@52RD_002.jpg[/upload]
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 楼主| 发表于 2009-7-22 14:51:15 | 显示全部楼层
我估计那些条纹是2440采集后写进ram里面失败引起的,我用IO采集是很完整的,还没找到解决办法。
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