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发表于 2016-6-27 10:34:48
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显示全部楼层
给个参考,亲测可用
- //输出窗口设置
- void OV7670_config_window(u16 startx,u16 starty,u16 width,u16 height)
- {
- u16 endx=(startx+width)%784; //QVGA输出的话改成 u16 endx=(startx+width*2)%784;
- u16 endy=(starty+height); // u16 endy=(starty+height*2);
- u8 x_reg,y_reg;
- u8 state,temp;
- state=ov7660_read_reg(0x32,&x_reg);
- x_reg&=0xC0;
- state=ov7660_read_reg(0x03,&y_reg);
- y_reg&=0xF0;
-
- //HREF
- temp=x_reg|((endx&0x7)<<3)|(startx&0x7);
- state=ov7670_write_reg(0x32,temp);
- temp=(startx&0x7F8)>>3;
- state=ov7670_write_reg(0x17,temp);
- temp=(endx&0x7F8)>>3;
- state=ov7670_write_reg(0x18,temp);
-
- //VREF
- temp=y_reg|((endy&0x3)<<2)|(starty&0x3);
- state=ov7670_write_reg(0x03,temp);
- temp=(starty&0x3FC)>>2;
- state=ov7670_write_reg(0x19,temp);
- temp=(endy&0x3FC)>>2;
- state=ov7670_write_reg(0x1A,temp);
- }
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