大佬们晚安,最近淘宝花了五块买了个ov7670,一直调不通,有了一点进展,但还是有一些迷惑请教诸君。
硬件 H750开发板
软件:DCMI与配置与摄像头寄存器配置用的是V7板的45号 0v7670例程。
进行彩色测试条显示好像是正常的,图片如下
但是显示截图时是错误的,整体非常非常红,只能看得清轮廓,图片如下(应该隐约可以看见我房间的空调):
感觉应该时寄存器配错了,希望诸位大佬指点一下,感激不尽。
附上寄存器配置数组:
static const unsigned char OV_reg[][2] =
{
{0x3a, 0x0c},
{0x67, 0xc0},
{0x68, 0x80},
{0x40, 0xd0},
{0x12, 0x14},
{0x32, 0x80},
#if 1 //320*240使用
{0x17, 0x17},//HSTART start high 8-bit MSB
{0x18, 0x05},//5 HSTOP end high 8-bit
#else //640*480使用
{0x17, 0x14},//HSTART start high 8-bit MSB
{0x18, 0x02},//5 HSTOP end high 8-bit
#endif
{0x19, 0x03},
{0x1a, 0x7b},
{0x03, 0x05},
{0x0c, 0x00},
{0x15, 0x00},
{0x3e, 0x00},
{0x70, 0x3a},
{0x71, 0x35},
{0x72, 0x11},
{0x73, 0x00},
{0xa2, 0x02},
{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},
{0x10, 0x00},
{0x0d, 0x00},
{0x14, 0x28},
{0xa5, 0x05},
{0xab, 0x07},
{0x24, 0x75},
{0x25, 0x63},
{0x26, 0xA5},
{0x9f, 0x78},
{0xa0, 0x68},
{0xa1, 0x03},
{0xa6, 0xdf},
{0xa7, 0xdf},
{0xa8, 0xf0},
{0xa9, 0x90},
{0xaa, 0x94},
{0x13, 0xe5},
{0x0e, 0x61},
{0x0f, 0x4b},
{0x16, 0x02},
{0x1e, 0x37},
{0x21, 0x02},
{0x22, 0x91},
{0x29, 0x07},
{0x33, 0x0b},
{0x35, 0x0b},
{0x37, 0x1d},
{0x38, 0x71},
{0x39, 0x2a},
{0x3c, 0x78},
{0x4d, 0x40},
{0x4e, 0x20},
{0x69, 0x00},
/*
emWin的情况下64MHz和48MHz稳定,72MHz不行,快了,容易错误
6B寄存器 bit6:7
00 bypass PLL
01 X4
10 X6
11 X8
11寄存器 bit7 保留
bit6 直接使用外部时钟
bit5:0
实际内部时钟的输出 = Finputclk / (bit[5:0] + 1)
摄像头晶振是24MHz ,当前配置24 * 8 / 3 = 64MHz
*/
{0x11, 0x02},
{0x6b, 0xc0},
{0x74, 0x19},
{0x8d, 0x4f},
{0x8e, 0x00},
{0x8f, 0x00},
{0x90, 0x00},
{0x91, 0x00},
{0x92, 0x00},
{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},
{0x4f, 0x80},
{0x50, 0x80},
{0x51, 0x00},
{0x52, 0x22},
{0x53, 0x5e},
{0x54, 0x80},
{0x09, 0x03},
{0x6e, 0x11},
{0x6f, 0x9f},
{0x55, 0x00},
{0x56, 0x40},
{0x57, 0x40},
{0x6a, 0x40},
{0x01, 0x40},
{0x02, 0x40},
{0x13, 0xe7},
{0x15, 0x00},
{0x58, 0x9e},
{0x41, 0x08},
{0x3f, 0x00},
{0x75, 0x05},
{0x76, 0xe1},
{0x4c, 0x00},
{0x77, 0x01},
{0x3d, 0xc2},
{0x4b, 0x09},
{0xc9, 0x60},
{0x41, 0x38},
{0x34, 0x11},
{0x3b, 0x02},
{0xa4, 0x89},
{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, 0x00},
};
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