OV7670 RAW输出 bayer 解码

今天终于搞定OV7670 raw输出啦，兴奋！！

参考链接：

https://pikacode.com/liplianin/s2-liplianin/commit/dab97f5d6e3b

http://www.amobbs.com/forum.php?mod=viewthread&tid=4736337

http://www.52rd.com/bbs/Detail_RD.BBS_263309_86_1_1.html

 COM13 @0x3d 由 0xc2-->0x08

#define RGB565_MASK_RED        0xF800
#define RGB565_MASK_GREEN                         0x07E0
#define RGB565_MASK_BLUE                         0x001F

void rgb565_2_rgb24(BYTE *rgb24, WORD rgb565)
{
 //extract RGB
 rgb24[2] = (rgb565 & RGB565_MASK_RED) >> 11;
 rgb24[1] = (rgb565 & RGB565_MASK_GREEN) >> 5;
 rgb24[0] = (rgb565 & RGB565_MASK_BLUE);

 //amplify the image
 rgb24[2] <<= 3;
 rgb24[1] <<= 2;
 rgb24[0] <<= 3;
}