stm32f1精英板7725颜色识别

q两个世界 · 发表于 2019-10-18 20:50:45

u8 OV7670_Init(void)
{
u8 temp;
u16 i=0;
//设置IO

GPIO_InitTypeDef  GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);    //使能相关端口时钟



GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_4;    // 端口配置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;    //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;    //IO口速度为50MHz
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_4);

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_15; //PA15输入上拉
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_15);

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_14);

GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE); //SWD

SCCB_Init();         //初始化SCCB 的IO口
if(SCCB_WR_Reg(0x12,0x80))return 1; //复位SCCB
delay_ms(50);
//读取产品型号
temp=SCCB_RD_Reg(0x0b);
if(temp!=0x73)return 2;
temp=SCCB_RD_Reg(0x0a);
if(temp!=0x76)return 2;
//初始化序列
for(i=0;i<sizeof(ov7670_init_reg_tbl)/sizeof(ov7670_init_reg_tbl[0]);i++)
{
   SCCB_WR_Reg(ov7670_init_reg_tbl[i][0],ov7670_init_reg_tbl[i][1]);
delay_ms(2);
}
   return 0x00; //ok
}
////////////////////////////////////////////////////////////////////////////
//OV7670功能设置
//白平衡设置
//0:自动
//1:太阳sunny
//2,阴天cloudy
//3,办公室office
//4,家里home
void OV7670_Light_Mode(u8 mode)
{
u8 reg13val=0XE7;//默认就是设置为自动白平衡
u8 reg01val=0;
u8 reg02val=0;
switch(mode)
{
case 1://sunny
reg13val=0XE5;
reg01val=0X5A;
reg02val=0X5C;
break;
case 2://cloudy
reg13val=0XE5;
reg01val=0X58;
reg02val=0X60;
break;
case 3://office
reg13val=0XE5;
reg01val=0X84;
reg02val=0X4c;
break;
case 4://home
reg13val=0XE5;
reg01val=0X96;
reg02val=0X40;
break;
}
SCCB_WR_Reg(0X13,reg13val);//COM8设置
SCCB_WR_Reg(0X01,reg01val);//AWB蓝色通道增益
SCCB_WR_Reg(0X02,reg02val);//AWB红色通道增益
}
//色度设置
//0:-2
//1:-1
//2,0
//3,1
//4,2
void OV7670_Color_Saturation(u8 sat)
{
u8 reg4f5054val=0X80;//默认就是sat=2,即不调节色度的设置
u8 reg52val=0X22;
u8 reg53val=0X5E;
switch(sat)
{
case 0://-2
reg4f5054val=0X40;
reg52val=0X11;
reg53val=0X2F;
break;
case 1://-1
reg4f5054val=0X66;
reg52val=0X1B;
reg53val=0X4B;
break;
case 3://1
reg4f5054val=0X99;
reg52val=0X28;
reg53val=0X71;
break;
case 4://2
reg4f5054val=0XC0;
reg52val=0X33;
reg53val=0X8D;
break;
}
SCCB_WR_Reg(0X4F,reg4f5054val); //色彩矩阵系数1
SCCB_WR_Reg(0X50,reg4f5054val); //色彩矩阵系数2
SCCB_WR_Reg(0X51,0X00); //色彩矩阵系数3
SCCB_WR_Reg(0X52,reg52val); //色彩矩阵系数4
SCCB_WR_Reg(0X53,reg53val); //色彩矩阵系数5
SCCB_WR_Reg(0X54,reg4f5054val); //色彩矩阵系数6
SCCB_WR_Reg(0X58,0X9E); //MTXS
}
//亮度设置
//0:-2
//1:-1
//2,0
//3,1
//4,2
void OV7670_Brightness(u8 bright)
{
u8 reg55val=0X00;//默认就是bright=2
    switch(bright)
{
case 0://-2
reg55val=0XB0;
break;
case 1://-1
reg55val=0X98;
break;
case 3://1
reg55val=0X18;
break;
case 4://2
reg55val=0X30;
break;
}
SCCB_WR_Reg(0X55,reg55val); //亮度调节
}
//对比度设置
//0:-2
//1:-1
//2,0
//3,1
//4,2
void OV7670_Contrast(u8 contrast)
{
u8 reg56val=0X40;//默认就是contrast=2
    switch(contrast)
{
case 0://-2
reg56val=0X30;
break;
case 1://-1
reg56val=0X38;
break;
case 3://1
reg56val=0X50;
break;
case 4://2
reg56val=0X60;
break;
}
SCCB_WR_Reg(0X56,reg56val); //对比度调节
}
//特效设置
//0:普通模式
//1,负片
//2,黑白
//3,偏红色
//4,偏绿色
//5,偏蓝色
//6,复古
void OV7670_Special_Effects(u8 eft)
{
u8 reg3aval=0X04;//默认为普通模式
u8 reg67val=0XC0;
u8 reg68val=0X80;
switch(eft)
{
case 1://负片
reg3aval=0X24;
reg67val=0X80;
reg68val=0X80;
break;
case 2://黑白
reg3aval=0X14;
reg67val=0X80;
reg68val=0X80;
break;
case 3://偏红色
reg3aval=0X14;
reg67val=0Xc0;
reg68val=0X80;
break;
case 4://偏绿色
reg3aval=0X14;
reg67val=0X40;
reg68val=0X40;
break;
case 5://偏蓝色
reg3aval=0X14;
reg67val=0X80;
reg68val=0XC0;
break;
case 6://复古
reg3aval=0X14;
reg67val=0XA0;
reg68val=0X40;
break;
}
SCCB_WR_Reg(0X3A,reg3aval);//TSLB设置
SCCB_WR_Reg(0X68,reg67val);//MANU,手动U值
SCCB_WR_Reg(0X67,reg68val);//MANV,手动V值
}
//设置图像输出窗口
//对QVGA设置。
void OV7670_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;
if(endy>784)endy-=784;
temp=SCCB_RD_Reg(0X03); //读取Vref之前的值
temp&=0XF0;
temp|=((endx&0X03)<<2)|(sx&0X03);
SCCB_WR_Reg(0X03,temp); //设置Vref的start和end的最低2位
SCCB_WR_Reg(0X19,sx>>2); //设置Vref的start高8位
SCCB_WR_Reg(0X1A,endx>>2); //设置Vref的end的高8位

temp=SCCB_RD_Reg(0X32); //读取Href之前的值
temp&=0XC0;
temp|=((endy&0X07)<<3)|(sy&0X07);
SCCB_WR_Reg(0X17,sy>>3); //设置Href的start高8位
SCCB_WR_Reg(0X18,endy>>3); //设置Href的end的高8位
}