本帖最后由 断桥残雪10086 于 2016-4-14 00:04 编辑
这是上位机显示的效果
初始化寄存器序列及其对应的值
const u8 ov7670_init_reg_tbl_YUV[][2]=
{
/*以下为OV7670 QVGA RGB565参数 */
//{0x3a, 0x04},//
//{0x40, 0x10},
//{0x12, 0x14},//QVGA,RGB输出
{0x12, 0x10},
{0x3a, 0x14},
{0x3d, 0x80},
//0 0 : Y U Y V (3a:14 3d:80)
//0 1 : Y V Y U (3a:14 3d:81)
//1 0 : U Y V Y (3a:18 3d:80)
//1 1 : V Y U Y (3a:18 3d:81)
{0x67, 0x11}, //手工设置 U
{0x68, 0xFF}, //手工设置 V
// {0x67, 0x22}, //手工设置 U
// {0x68, 0xEE}, //手工设置 V
{0x40, 0xC0}, //YUV输出
//输出窗口设置
{0x32, 0x80}, //HREF
{0x17, 0x16}, //HSTART
{0x18, 0x04},//HSTOP
{0x19, 0x02},//VSTRT //10
{0x1a, 0x7a},//0x7a, VSTOP
{0x03, 0x0a},//0x0a, VREF
{0x0c, 0x0c},
{0x15, 0x00},
{0x3e, 0x00},//10
{0x70, 0x00},
{0x71, 0x01},
{0x72, 0x11},
{0x73, 0x09},//
{0xa2, 0x02},//15 //20
{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}, //30
{0x83, 0x8f},
{0x84, 0x96},
{0x85, 0xa3},
{0x86, 0xaf},
{0x87, 0xc4},//30
{0x88, 0xd7},
{0x89, 0xe8},
{0x13, 0xe0},
{0x00, 0x00},//AGC
{0x10, 0x00}, //40
{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, //50
{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, //60
{0x21, 0x02},
{0x22, 0x91},
{0x29, 0x07},
{0x33, 0x0b},
{0x35, 0x0b},//60
{0x37, 0x1d},
{0x38, 0x71},
{0x39, 0x2a},
{0x3c, 0x78},
{0x4d, 0x40}, //70
{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 //80
{0x96, 0x00},
{0x9a, 0x80},
{0xb0, 0x84},
{0xb1, 0x0c},
{0xb2, 0x0e},
{0xb3, 0x82},//80
{0xb8, 0x0a},
{0x43, 0x14},
{0x44, 0xf0},
{0x45, 0x34}, //90
{0x46, 0x58},
{0x47, 0x28},
{0x48, 0x3a},
{0x59, 0x88},
{0x5a, 0x88},
{0x5b, 0x44},//90
{0x5c, 0x67},
{0x5d, 0x49},
{0x5e, 0x0e},
{0x64, 0x04}, //100
{0x65, 0x20},
{0x66, 0x05},
{0x94, 0x04},
{0x95, 0x08},
{0x6c, 0x0a},
{0x6d, 0x55},
{0x4f, 0x80},
{0x50, 0x80},
{0x51, 0x00},
{0x52, 0x22}, //110
{0x53, 0x5e},
{0x54, 0x80},
//{0x54, 0x40},//110
{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 //118
};
这是寄存器设置代码。
//更新OV7670显示
void camera_refresh()
{
u32 i,j,k;
u16 color;
if(ov_sta==2)
{
OV7670_RRST=0; //开始复位读指针
OV7670_RCK_L;
OV7670_RCK_H;
OV7670_RCK_L;
OV7670_RRST=1; //复位读指针结束
OV7670_RCK_H;
for(k=0; k<5; k++)
{
delay_ms(1000);
}
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
USART_SendData(USART1,0x01);
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
USART_SendData(USART1,0xfe); //发送的0x01,oxfe为上位机软件帧头格式
for(i=0; i<height; i++)
{
for(j=0; j<width; j++)
{
OV7670_RCK_L;
color = GPIOC->IDR&0XFF; //读数据
OV7670_RCK_H;
// if(color==0x01)
// color=0x02;
// if(color==0xfe)
// color=0xfd;
// while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
// USART_SendData(USART1,color);
//color<<=8;
OV7670_RCK_L;//因为设置的是 YUYV输出,第二个字节没用,不需要读
//color = GPIOC->IDR&0XFF;
OV7670_RCK_H;
if(color==0x01)
color=0x02;
if(color==0xfe)
color=0xfd;
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
USART_SendData(USART1,color);
//delay_ms(5);
}
}
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
USART_SendData(USART1,0xfe);
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
USART_SendData(USART1,0x01); ////发送的0xfe,ox01为上位机软件帧尾格式
//EXTI_ClearITPendingBit(EXTI_Line8); //清除LINE8上的中断标志位
ov_sta=0; //开始下一次采集
// ov_frame++;
EXTI->IMR |=(1<<8); //开中断
}
}
此部分为采集图像并上传到上位机代码。
for(i=0;i<sizeof(ov7670_init_reg_tbl_YUV)/sizeof(ov7670_init_reg_tbl_YUV[0]);i++) //我把OV7670初始化部分的寄存器设置代码中的除以2删了,问题是没删时图像效果也不好
{
SCCB_WR_Reg(ov7670_init_reg_tbl_YUV
[0],ov7670_init_reg_tbl_YUV[1]);
delay_ms(2);
}
return 0x00; //ok
}
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