stm32f4接外部ov2640不显示图像

L624333492 · 发表于 2019-7-29 18:32:54

u8 OV2640_Init(void)
{
u16 i=0;
u16 reg;
//ÉèÖÃIO
  GPIO_InitTypeDef  GPIO_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG, ENABLE);
  //GPIOG9,15³õÊ¼»¯ÉèÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_15;//PG9,15ÍÆÍìÊä³ö
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; //ÍÆÍìÊä³ö
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//ÍÆÍìÊä³ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//ÉÏÀ
  GPIO_Init(GPIOG, &GPIO_InitStructure);//³õÊ¼»¯

   OV2640_PWDN=0; //POWER ON
delay_ms(10);
OV2640_RST=0; //¸´Î»OV2640
delay_ms(10);
OV2640_RST=1; //½áÊø¸´Î»
  SCCB_Init();             //³õÊ¼»¯SCCB µÄIO¿Ú
SCCB_WR_Reg(OV2640_DSP_RA_DLMT, 0x01); //²Ù×÷sensor¼Ä´æÆ÷
   SCCB_WR_Reg(OV2640_SENSOR_COM7, 0x80); //Èí¸´Î»OV2640
delay_ms(50);
reg=SCCB_RD_Reg(OV2640_SENSOR_MIDH); //¶ÁÈ¡³§¼ÒID ¸ß°ËÎ»
reg<<=8;
reg|=SCCB_RD_Reg(OV2640_SENSOR_MIDL); //¶ÁÈ¡³§¼ÒID µÍ°ËÎ»
if(reg!=OV2640_MID)
{
      printf("MID:%d\r\n",reg);
      return 1;
}
reg=SCCB_RD_Reg(OV2640_SENSOR_PIDH); //¶ÁÈ¡³§¼ÒID ¸ß°ËÎ»
reg<<=8;
reg|=SCCB_RD_Reg(OV2640_SENSOR_PIDL); //¶ÁÈ¡³§¼ÒID µÍ°ËÎ»
if(reg!=OV2640_PID)
{
      printf("HID:%d\r\n",reg);
      //return 2;
}
   //³õÊ¼»¯ OV2640,²ÉÓÃSXGA·Ö±æÂÊ(1600*1200)
for(i=0;i<sizeof(ov2640_sxga_init_reg_tbl)/2;i++)
{
         SCCB_WR_Reg(ov2640_sxga_init_reg_tbl[i][0],ov2640_sxga_init_reg_tbl[i][1]);
   }
   return 0x00;    //ok
}
//OV2640ÇÐ»»ÎªJPEGÄ£Ê½
void OV2640_JPEG_Mode(void)
{
u16 i=0;
//ÉèÖÃ:YUV422¸ñÊ½
for(i=0;i<(sizeof(ov2640_yuv422_reg_tbl)/2);i++)
{
      SCCB_WR_Reg(ov2640_yuv422_reg_tbl[i][0],ov2640_yuv422_reg_tbl[i][1]);
}

//ÉèÖÃ:Êä³öJPEGÊý¾Ý
for(i=0;i<(sizeof(ov2640_jpeg_reg_tbl)/2);i++)
{
      SCCB_WR_Reg(ov2640_jpeg_reg_tbl[i][0],ov2640_jpeg_reg_tbl[i][1]);
}
}
//OV2640ÇÐ»»ÎªRGB565Ä£Ê½
void OV2640_RGB565_Mode(void)
{
u16 i=0;
//ÉèÖÃ:RGB565Êä³ö
for(i=0;i<(sizeof(ov2640_rgb565_reg_tbl)/2);i++)
{
      SCCB_WR_Reg(ov2640_rgb565_reg_tbl[i][0],ov2640_rgb565_reg_tbl[i][1]);
}
}
//×Ô¶¯ÆØ¹âÉèÖÃ²ÎÊý±í,Ö§³Ö5¸öµÈ¼¶
const static u8 OV2640_AUTOEXPOSURE_LEVEL[5][8]=
{
{
      0xFF,0x01,
      0x24,0x20,
      0x25,0x18,
      0x26,0x60,
},
{
      0xFF,0x01,
      0x24,0x34,
      0x25,0x1c,
      0x26,0x00,
},
{
      0xFF,0x01,
      0x24,0x3e,
      0x25,0x38,
      0x26,0x81,
},
{
      0xFF,0x01,
      0x24,0x48,
      0x25,0x40,
      0x26,0x81,
},
{
      0xFF,0x01,
      0x24,0x58,
      0x25,0x50,
      0x26,0x92,
},
};
//OV2640×Ô¶¯ÆØ¹âµÈ¼¶ÉèÖÃ
//level:0~4
void OV2640_Auto_Exposure(u8 level)
{
u8 i;
u8 *p=(u8*)OV2640_AUTOEXPOSURE_LEVEL[level];
for(i=0;i<4;i++)
{
      SCCB_WR_Reg(p[i*2],p[i*2+1]);
}
}
//°×Æ½ºâÉèÖÃ
//0:×Ô¶¯
//1:Ì«Ñôsunny
//2,ÒõÌìcloudy
//3,°ì¹«ÊÒoffice
//4,¼ÒÀïhome
void OV2640_Light_Mode(u8 mode)
{
u8 regccval=0X5E;//Sunny
u8 regcdval=0X41;
u8 regceval=0X54;
switch(mode)
{
      case 0://auto
         SCCB_WR_Reg(0XFF,0X00);
         SCCB_WR_Reg(0XC7,0X10);//AWB ON
         return;
      case 2://cloudy
         regccval=0X65;
         regcdval=0X41;
         regceval=0X4F;
         break;
      case 3://office
         regccval=0X52;
         regcdval=0X41;
         regceval=0X66;
         break;
      case 4://home
         regccval=0X42;
         regcdval=0X3F;
         regceval=0X71;
         break;
}
SCCB_WR_Reg(0XFF,0X00);
SCCB_WR_Reg(0XC7,0X40); //AWB OFF
SCCB_WR_Reg(0XCC,regccval);
SCCB_WR_Reg(0XCD,regcdval);
SCCB_WR_Reg(0XCE,regceval);
}
//É«¶ÈÉèÖÃ
//0:-2
//1:-1
//2,0
//3,+1
//4,+2
void OV2640_Color_Saturation(u8 sat)
{
u8 reg7dval=((sat+2)<<4)|0X08;
SCCB_WR_Reg(0XFF,0X00);
SCCB_WR_Reg(0X7C,0X00);
SCCB_WR_Reg(0X7D,0X02);
SCCB_WR_Reg(0X7C,0X03);
SCCB_WR_Reg(0X7D,reg7dval);
SCCB_WR_Reg(0X7D,reg7dval);
}
//ÁÁ¶ÈÉèÖÃ
//0

0X00)-2
//1

0X10)-1
//2,(0X20) 0
//3,(0X30)+1
//4,(0X40)+2
void OV2640_Brightness(u8 bright)
{
  SCCB_WR_Reg(0xff, 0x00);
  SCCB_WR_Reg(0x7c, 0x00);
  SCCB_WR_Reg(0x7d, 0x04);
  SCCB_WR_Reg(0x7c, 0x09);
  SCCB_WR_Reg(0x7d, bright<<4);
  SCCB_WR_Reg(0x7d, 0x00);
}
//¶Ô±È¶ÈÉèÖÃ
//0:-2
//1:-1
//2,0
//3,+1
//4,+2
void OV2640_Contrast(u8 contrast)
{
u8 reg7d0val=0X20;//Ä¬ÈÏÎªÆÕÍ¨Ä£Ê½
u8 reg7d1val=0X20;
   switch(contrast)
{
      case 0://-2
         reg7d0val=0X18;
         reg7d1val=0X34;
         break;
      case 1://-1
         reg7d0val=0X1C;
         reg7d1val=0X2A;
         break;
      case 3://1
         reg7d0val=0X24;
         reg7d1val=0X16;
         break;
      case 4://2
         reg7d0val=0X28;
         reg7d1val=0X0C;
         break;
}
SCCB_WR_Reg(0xff,0x00);
SCCB_WR_Reg(0x7c,0x00);
SCCB_WR_Reg(0x7d,0x04);
SCCB_WR_Reg(0x7c,0x07);
SCCB_WR_Reg(0x7d,0x20);
SCCB_WR_Reg(0x7d,reg7d0val);
SCCB_WR_Reg(0x7d,reg7d1val);
SCCB_WR_Reg(0x7d,0x06);
}
//ÌØÐ§ÉèÖÃ
//0:ÆÕÍ¨Ä£Ê½
//1,¸ºÆ¬
//2,ºÚ°×
//3,Æ«ºìÉ«
//4,Æ«ÂÌÉ«
//5,Æ«À¶É«
//6,¸´¹Å
void OV2640_Special_Effects(u8 eft)
{
u8 reg7d0val=0X00;//Ä¬ÈÏÎªÆÕÍ¨Ä£Ê½
u8 reg7d1val=0X80;
u8 reg7d2val=0X80;
switch(eft)
{
      case 1://¸ºÆ¬
         reg7d0val=0X40;
         break;
      case 2://ºÚ°×
         reg7d0val=0X18;
         break;
      case 3://Æ«ºìÉ«
         reg7d0val=0X18;
         reg7d1val=0X40;
         reg7d2val=0XC0;
         break;
      case 4://Æ«ÂÌÉ«
         reg7d0val=0X18;
         reg7d1val=0X40;
         reg7d2val=0X40;
         break;
      case 5://Æ«À¶É«
         reg7d0val=0X18;
         reg7d1val=0XA0;
         reg7d2val=0X40;
         break;
      case 6://¸´¹Å
         reg7d0val=0X18;
         reg7d1val=0X40;
         reg7d2val=0XA6;
         break;
}
SCCB_WR_Reg(0xff,0x00);
SCCB_WR_Reg(0x7c,0x00);
SCCB_WR_Reg(0x7d,reg7d0val);
SCCB_WR_Reg(0x7c,0x05);
SCCB_WR_Reg(0x7d,reg7d1val);
SCCB_WR_Reg(0x7d,reg7d2val);
}
//²ÊÌõ²âÊÔ
//sw:0,¹Ø±Õ²ÊÌõ
// 1,¿ªÆô²ÊÌõ(×¢ÒâOV2640µÄ²ÊÌõÊÇµþ¼ÓÔÚÍ¼ÏñÉÏÃæµÄ)
void OV2640_Color_Bar(u8 sw)
{
u8 reg;
SCCB_WR_Reg(0XFF,0X01);
reg=SCCB_RD_Reg(0X12);
reg&=~(1<<1);
if(sw)reg|=1<<1;
SCCB_WR_Reg(0X12,reg);
}
//ÉèÖÃÍ¼ÏñÊä³ö´°¿Ú
//sx,sy,ÆðÊ¼µØÖ·
//width,height:¿í¶È(¶ÔÓ¦:horizontal)ºÍ¸ß¶È(¶ÔÓ¦:vertical)
void OV2640_Window_Set(u16 sx,u16 sy,u16 width,u16 height)
{
u16 endx;
u16 endy;
u8 temp;
endx=sx+width/2; //V*2
   endy=sy+height/2;

SCCB_WR_Reg(0XFF,0X01);
temp=SCCB_RD_Reg(0X03);             //¶ÁÈ¡VrefÖ®Ç°µÄÖµ
temp&=0XF0;
temp|=((endy&0X03)<<2)|(sy&0X03);
SCCB_WR_Reg(0X03,temp);             //ÉèÖÃVrefµÄstartºÍendµÄ×îµÍ2Î»
SCCB_WR_Reg(0X19,sy>>2);          //ÉèÖÃVrefµÄstart¸ß8Î»
SCCB_WR_Reg(0X1A,endy>>2);          //ÉèÖÃVrefµÄendµÄ¸ß8Î»

temp=SCCB_RD_Reg(0X32);             //¶ÁÈ¡HrefÖ®Ç°µÄÖµ
temp&=0XC0;
temp|=((endx&0X07)<<3)|(sx&0X07);
SCCB_WR_Reg(0X32,temp);             //ÉèÖÃHrefµÄstartºÍendµÄ×îµÍ3Î»
SCCB_WR_Reg(0X17,sx>>3);          //ÉèÖÃHrefµÄstart¸ß8Î»
SCCB_WR_Reg(0X18,endx>>3);          //ÉèÖÃHrefµÄendµÄ¸ß8Î»
}
//ÉèÖÃÍ¼ÏñÊä³ö´óÐ¡
//OV2640Êä³öÍ¼ÏñµÄ´óÐ¡(·Ö±æÂÊ),ÍêÈ«ÓÉ¸Äº¯ÊýÈ·¶¨
//width,height:¿í¶È(¶ÔÓ¦:horizontal)ºÍ¸ß¶È(¶ÔÓ¦:vertical),widthºÍheight±ØÐëÊÇ4µÄ±¶Êý
//·µ»ØÖµ:0,ÉèÖÃ³É¹¦
// ÆäËû,ÉèÖÃÊ§°Ü
u8 OV2640_OutSize_Set(u16 width,u16 height)
{
u16 outh;
u16 outw;
u8 temp;
if(width%4)return 1;
if(height%4)return 2;
outw=width/4;
outh=height/4;
SCCB_WR_Reg(0XFF,0X00);
SCCB_WR_Reg(0XE0,0X04);
SCCB_WR_Reg(0X5A,outw&0XFF);       //ÉèÖÃOUTWµÄµÍ°ËÎ»
SCCB_WR_Reg(0X5B,outh&0XFF);       //ÉèÖÃOUTHµÄµÍ°ËÎ»
temp=(outw>>8)&0X03;
temp|=(outh>>6)&0X04;
SCCB_WR_Reg(0X5C,temp);             //ÉèÖÃOUTH/OUTWµÄ¸ßÎ»
SCCB_WR_Reg(0XE0,0X00);
return 0;
}
//ÉèÖÃÍ¼Ïñ¿ª´°´óÐ¡
//ÓÉ:OV2640_ImageSize_SetÈ·¶¨´«¸ÐÆ÷Êä³ö·Ö±æÂÊ´Ó´óÐ¡.
//¸Ãº¯ÊýÔòÔÚÕâ¸ö·¶Î§ÉÏÃæ½øÐÐ¿ª´°,ÓÃÓÚOV2640_OutSize_SetµÄÊä³ö
//×¢Òâ:±¾º¯ÊýµÄ¿í¶ÈºÍ¸ß¶È,±ØÐë´óÓÚµÈÓÚOV2640_OutSize_Setº¯ÊýµÄ¿í¶ÈºÍ¸ß¶È
//    OV2640_OutSize_SetÉèÖÃµÄ¿í¶ÈºÍ¸ß¶È,¸ù¾Ý±¾º¯ÊýÉèÖÃµÄ¿í¶ÈºÍ¸ß¶È,ÓÉDSP
//    ×Ô¶¯¼ÆËãËõ·Å±ÈÀý,Êä³ö¸øÍâ²¿Éè±¸.
//width,height:¿í¶È(¶ÔÓ¦:horizontal)ºÍ¸ß¶È(¶ÔÓ¦:vertical),widthºÍheight±ØÐëÊÇ4µÄ±¶Êý
//·µ»ØÖµ:0,ÉèÖÃ³É¹¦
// ÆäËû,ÉèÖÃÊ§°Ü
u8 OV2640_ImageWin_Set(u16 offx,u16 offy,u16 width,u16 height)
{
u16 hsize;
u16 vsize;
u8 temp;
if(width%4)return 1;
if(height%4)return 2;
hsize=width/4;
vsize=height/4;
SCCB_WR_Reg(0XFF,0X00);
SCCB_WR_Reg(0XE0,0X04);
SCCB_WR_Reg(0X51,hsize&0XFF);       //ÉèÖÃH_SIZEµÄµÍ°ËÎ»
SCCB_WR_Reg(0X52,vsize&0XFF);       //ÉèÖÃV_SIZEµÄµÍ°ËÎ»
SCCB_WR_Reg(0X53,offx&0XFF);       //ÉèÖÃoffxµÄµÍ°ËÎ»
SCCB_WR_Reg(0X54,offy&0XFF);       //ÉèÖÃoffyµÄµÍ°ËÎ»
temp=(vsize>>1)&0X80;
temp|=(offy>>4)&0X70;
temp|=(hsize>>5)&0X08;
temp|=(offx>>8)&0X07;
SCCB_WR_Reg(0X55,temp);             //ÉèÖÃH_SIZE/V_SIZE/OFFX,OFFYµÄ¸ßÎ»
SCCB_WR_Reg(0X57,(hsize>>2)&0X80); //ÉèÖÃH_SIZE/V_SIZE/OFFX,OFFYµÄ¸ßÎ»
SCCB_WR_Reg(0XE0,0X00);
return 0;
}
//¸Ãº¯ÊýÉèÖÃÍ¼Ïñ³ß´ç´óÐ¡,Ò²¾ÍÊÇËùÑ¡¸ñÊ½µÄÊä³ö·Ö±æÂÊ
//UXGA:1600*1200,SVGA:800*600,CIF:352*288
//width,height:Í¼Ïñ¿í¶ÈºÍÍ¼Ïñ¸ß¶È
//·µ»ØÖµ:0,ÉèÖÃ³É¹¦
// ÆäËû,ÉèÖÃÊ§°Ü
u8 OV2640_ImageSize_Set(u16 width,u16 height)
{
u8 temp;
SCCB_WR_Reg(0XFF,0X00);
SCCB_WR_Reg(0XE0,0X04);
SCCB_WR_Reg(0XC0,(width)>>3&0XFF);       //ÉèÖÃHSIZEµÄ10:3Î»
SCCB_WR_Reg(0XC1,(height)>>3&0XFF);       //ÉèÖÃVSIZEµÄ10:3Î»
temp=(width&0X07)<<3;
temp|=height&0X07;
temp|=(width>>4)&0X80;
SCCB_WR_Reg(0X8C,temp);
SCCB_WR_Reg(0XE0,0X00);
return 0;
}