STM32 OV7670拍照程序 - - Powered by Discuz!

#include "sys.h"
#include "ov7670.h"
#include "ov7670cfg.h"
#include "timer.h"
#include "delay.h"
#include "usart.h"
#include "sccb.h"
#include "exti.h"
//初始化OV7670
//返回0:成功
//返回其他值:错误代码
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_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOG|RCC_APB2Periph_AFIO, ENABLE); //使能相关端口时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //PA8 输入上拉
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_8);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4; // 端口配置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_3|GPIO_Pin_4);
GPIO_InitStructure.GPIO_Pin = 0xff; //PC0~7 输入上拉
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_SetBits(GPIOD,GPIO_Pin_6);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOG, &GPIO_InitStructure);
GPIO_SetBits(GPIOG,GPIO_Pin_14|GPIO_Pin_15);
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]);
}
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
}

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#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "lcd.h"
#include "key.h"
#include "usmart.h"
#include "malloc.h"
#include "sdio_sdcard.h"
#include "w25qxx.h"
#include "ff.h"
#include "exfuns.h"
#include "text.h"
#include "piclib.h"
#include "string.h"
#include "math.h"
#include "ov7670.h"
#include "beep.h"
#include "timer.h"
#include "exti.h"
extern u8 ov_sta; //在exit.c里面定义
extern u8 ov_frame; //在timer.c里面定义
//更新LCD显示
void camera_refresh(void)
{
u32 j;
u16 color;
if(ov_sta)//有帧中断更新？
{
LCD_Scan_Dir(U2D_L2R); //从上到下,从左到右
if(lcddev.id==0X1963)LCD_Set_Window((lcddev.width-240)/2,(lcddev.height-320)/2,240,320);//将显示区域设置到屏幕中央
else if(lcddev.id==0X5510||lcddev.id==0X5310)LCD_Set_Window((lcddev.width-320)/2,(lcddev.height-240)/2,320,240);//将显示区域设置到屏幕中央
LCD_WriteRAM_Prepare(); //开始写入GRAM
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(j=0;j<76800;j++)
{
OV7670_RCK_L;
color=GPIOC->IDR&0XFF; //读数据
OV7670_RCK_H;
color<<=8;
OV7670_RCK_L;
color|=GPIOC->IDR&0XFF; //读数据
OV7670_RCK_H;
LCD->LCD_RAM=color;
}
ov_sta=0; //清零帧中断标记
ov_frame++;
LCD_Scan_Dir(DFT_SCAN_DIR); //恢复默认扫描方向
}
}
//文件名自增（避免覆盖）
//组合成:形如"0:PHOTO/PIC13141.bmp"的文件名
void camera_new_pathname(u8 *pname)
{
u8 res;
u16 index=0;
while(index<0XFFFF)
{
sprintf((char*)pname,"0:PHOTO/PIC%05d.bmp",index);
res=f_open(ftemp,(const TCHAR*)pname,FA_READ);//尝试打开这个文件
if(res==FR_NO_FILE)break; //该文件名不存在=正是我们需要的.
index++;
}
}
int main(void)
{
u8 res;
u8 *pname; //带路径的文件名
u8 key; //键值
u8 i;
u8 sd_ok=1; //0,sd卡不正常;1,SD卡正常.
delay_init(); //延时函数初始化
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置中断优先级分组为组2：2位抢占优先级，2位响应优先级
uart_init(115200); //串口初始化为115200
usmart_dev.init(72); //初始化USMART
LED_Init(); //初始化与LED连接的硬件接口
KEY_Init(); //初始化按键
LCD_Init(); //初始化LCD
BEEP_Init(); //蜂鸣器初始化
W25QXX_Init(); //初始化W25Q128
my_mem_init(SRAMIN); //初始化内部内存池
exfuns_init(); //为fatfs相关变量申请内存
f_mount(fs[0],"0:",1); //挂载SD卡
f_mount(fs[1],"1:",1); //挂载FLASH.
POINT_COLOR=RED;
while(font_init()) //检查字库
{
LCD_ShowString(30,50,200,16,16,"Font Error!");
delay_ms(200);
LCD_Fill(30,50,240,66,WHITE);//清除显示
}
Show_Str(30,50,200,16,"战舰STM32F1开发板",16,0);
Show_Str(30,70,200,16,"照相机实验",16,0);
Show_Str(30,90,200,16,"KEY0:拍照",16,0);
Show_Str(30,110,200,16,"正点原子@ALIENTEK",16,0);
Show_Str(30,130,200,16,"2015年1月20日",16,0);
res=f_mkdir("0:/PHOTO"); //创建PHOTO文件夹
if(res!=FR_EXIST&&res!=FR_OK) //发生了错误
{
Show_Str(30,150,240,16,"SD卡错误!",16,0);
delay_ms(200);
Show_Str(30,170,240,16,"拍照功能将不可用!",16,0);
sd_ok=0;
}else
{
Show_Str(30,150,240,16,"SD卡正常!",16,0);
delay_ms(200);
Show_Str(30,170,240,16,"KEY0:拍照",16,0);
sd_ok=1;
}
pname=mymalloc(SRAMIN,30); //为带路径的文件名分配30个字节的内存
while(pname==NULL) //内存分配出错
{
Show_Str(30,190,240,16,"内存分配失败!",16,0);
delay_ms(200);
LCD_Fill(30,190,240,146,WHITE);//清除显示
delay_ms(200);
}
while(OV7670_Init())//初始化OV7670
{
Show_Str(30,190,240,16,"OV7670 错误!",16,0);
delay_ms(200);
LCD_Fill(30,190,239,206,WHITE);
delay_ms(200);
}
Show_Str(30,190,200,16,"OV7670 正常",16,0);
delay_ms(1500);
TIM6_Int_Init(10000,7199); //10Khz计数频率,1秒钟中断
EXTI8_Init(); //使能定时器捕获
OV7670_Window_Set(12,176,240,320); //设置窗口
OV7670_CS=0;
LCD_Clear(BLACK);
while(1)
{
key=KEY_Scan(0);//不支持连按
if(key==KEY0_PRES)
{
if(sd_ok)
{
LED1=0; //点亮DS1,提示正在拍照
camera_new_pathname(pname);//得到文件名
if(bmp_encode(pname,(lcddev.width-240)/2,(lcddev.height-320)/2,240,320,0))//拍照有误
{
Show_Str(40,130,240,12,"写入文件错误!",12,0);
}else
{
Show_Str(40,130,240,12,"拍照成功!",12,0);
Show_Str(40,150,240,12,"保存为:",12,0);
Show_Str(40+42,150,240,12,pname,12,0);
BEEP=1; //蜂鸣器短叫，提示拍照完成
delay_ms(100);
}
}else //提示SD卡错误
{
Show_Str(40,130,240,12,"SD卡错误!",12,0);
Show_Str(40,150,240,12,"拍照功能不可用!",12,0);
}
BEEP=0;//关闭蜂鸣器
LED1=1;//关闭DS1
delay_ms(1800);//等待1.8秒钟
LCD_Clear(BLACK);
}else delay_ms(5);
camera_refresh();//更新显示
i++;
if(i==40)//DS0闪烁.
{
i=0;
LED0=!LED0;
}
}
}

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