ov7670.c

STM32F103VET6驱动CMOS摄像头

/*

wangguanfu
2009-08-06

*/



#include "ov7670.h"
#include "delay.h"
#include"VARIABLE.h"
static const change_reg[CHANGE_REG_NUM][2]=
{
 /*  {0x12, 0x46},*/

	{0x3a, 0x04},
	{0x40, 0xd0},
	{0x12, 0x14},
	{0x32, 0x80},
	{0x17, 0x16},
	{0x18, 0x04},
	{0x19, 0x02},
	{0x1a, 0x7b},//0x7a,
	{0x03, 0x06},//0x0a,
	{0x0c, 0x00},
	{0x3e, 0x00},//
	{0x70, 0x00},//00
	{0x71, 0x00},//0x85测试
	{0x72, 0x11},
	{0x73, 0x00},//
	{0xa2, 0x02},
	{0x11, 0x02},
	{0x7a, 0x20},
	{0x7b, 0x1c},
	{0x7c, 0x28},
	{0x7d, 0x3c},
	{0x7e, 0x55},
	{0x7f, 0x68},
	{0x80, 0x76},
	{0x81, 0x80},
	{0x82, 0x88},
	{0x83, 0x8f},
	{0x84, 0x96},
	{0x85, 0xa3},
	{0x86, 0xaf},
	{0x87, 0xc4},
	{0x88, 0xd7},
	{0x89, 0xe8},
	{0x13, 0xe0},
	{0x00, 0x00},//AGC
	{0x10, 0x00},
	{0x0d, 0x00},
	{0x14, 0x20},//0x38, limit the max gain
	{0xa5, 0x05},
	{0xab, 0x07},
	{0x24, 0x75},
	{0x25, 0x63},
	{0x26, 0xA5},
	{0x9f, 0x78},
	{0xa0, 0x68},
	{0xa1, 0x03},//0x0b,
	{0xa6, 0xdf},//0xd8,
	{0xa7, 0xdf},//0xd8,
	{0xa8, 0xf0},
	{0xa9, 0x90},
	{0xaa, 0x94},
	{0x13, 0xe5},
	{0x0e, 0x61},
	{0x0f, 0x4b},
	{0x16, 0x02},
	{0x1e, 0x37},//0x07,
	{0x21, 0x02},
	{0x22, 0x91},
	{0x29, 0x07},
	{0x33, 0x0b},
	{0x35, 0x0b},
	{0x37, 0x1d},
	{0x38, 0x71},
	{0x39, 0x2a},//
	{0x3c, 0x78},
	{0x4d, 0x40},
	{0x4e, 0x20},
	{0x69, 0x0c},///////////////////////
	{0x6b, 0x80},//PLL
	{0x74, 0x19},
	{0x8d, 0x4f},
	{0x8e, 0x00},
	{0x8f, 0x00},
	{0x90, 0x00},
	{0x91, 0x00},
	{0x92, 0x00},//0x19,//0x66
	{0x96, 0x00},
	{0x9a, 0x80},
	{0xb0, 0x84},
	{0xb1, 0x0c},
	{0xb2, 0x0e},
	{0xb3, 0x82},
	{0xb8, 0x0a},
	{0x43, 0x14},
	{0x44, 0xf0},
	{0x45, 0x34},
	{0x46, 0x58},
	{0x47, 0x28},
	{0x48, 0x3a},
	{0x59, 0x88},
	{0x5a, 0x88},
	{0x5b, 0x44},
	{0x5c, 0x67},
	{0x5d, 0x49},
	{0x5e, 0x0e},
	{0x64, 0x04},
	{0x65, 0x20},
	{0x66, 0x05},
	{0x94, 0x04},
	{0x95, 0x08},
	{0x6c, 0x0a},
	{0x6d, 0x55},
	{0x6e, 0x11},
	{0x6f, 0x9f},//0x9e for advance AWB
	{0x6a, 0x00},
	{0x01, 0x80},
	{0x02, 0x80},
	{0x13, 0xe7},
	{0x15, 0x00},
	{0x4f, 0x80},
	{0x50, 0x80},
	{0x51, 0x00},
	{0x52, 0x22},
	{0x53, 0x5e},
	{0x54, 0x80},
	{0x58, 0x9e},	
	{0x41, 0x08},
	{0x3f, 0x00},
	{0x75, 0x05},
	{0x76, 0xe1},
	{0x4c, 0x00},
	{0x77, 0x01},
	{0x3d, 0xc2},	//0xc0,
	{0x4b, 0x09},
	{0xc9, 0x60},
	{0x41, 0x38},
	{0x56, 0x40},//0x40,  change according to Jim's request	
	{0x34, 0x11},
	{0x3b, 0x02},//0x00,//0x02,
	{0xa4, 0x89},//0x88,
	{0x96, 0x00},
	{0x97, 0x30},
	{0x98, 0x20},
	{0x99, 0x30},
	{0x9a, 0x84},
	{0x9b, 0x29},
	{0x9c, 0x03},
	{0x9d, 0x4c},
	{0x9e, 0x3f},
	{0x78, 0x04},	
	{0x79, 0x01},
	{0xc8, 0xf0},
	{0x79, 0x0f},
	{0xc8, 0x00},
	{0x79, 0x10},
	{0xc8, 0x7e},
	{0x79, 0x0a},
	{0xc8, 0x80},
	{0x79, 0x0b},
	{0xc8, 0x01},
	{0x79, 0x0c},
	{0xc8, 0x0f},
	{0x79, 0x0d},
	{0xc8, 0x20},
	{0x79, 0x09},
	{0xc8, 0x80},
	{0x79, 0x02},
	{0xc8, 0xc0},
	{0x79, 0x03},
	{0xc8, 0x40},
	{0x79, 0x05},
	{0xc8, 0x30},
	{0x79, 0x26},
	{0x09, 0x03},
	{0x55, 0x00},
	{0x56, 0x40},	
	{0x3b, 0xC2},//0x82,//0xc0,//0xc2,	//night mode
};

////////////////////////////
//功能：写OV7660寄存器
//返回：1-成功	0-失败
uchar wrOV7670Reg(uchar regID, uchar regDat)
{
	startSCCB();
	if(0==SCCBwriteByte(0x42))
	{
		stopSCCB();
		return(0);
	}
	Delay_nUS(100);
  	if(0==SCCBwriteByte(regID))
	{
		stopSCCB();
		return(0);
	}
	Delay_nUS(100);
  	if(0==SCCBwriteByte(regDat))
	{
		stopSCCB();
		return(0);
	}
  	stopSCCB();
	
  	return(1);
}
////////////////////////////
//功能：读OV7660寄存器
//返回：1-成功	0-失败
uchar rdOV7670Reg(uchar regID, uchar *regDat)
{
	//通过写操作设置寄存器地址
	startSCCB();
	if(0==SCCBwriteByte(0x42))
	{
		stopSCCB();
		return(0);
	}
	Delay_nUS(100);
  	if(0==SCCBwriteByte(regID))
	{
		stopSCCB();
		return(0);
	}
	stopSCCB();
	
	Delay_nUS(100);
	
	//设置寄存器地址后，才是读
	startSCCB();
	if(0==SCCBwriteByte(0x43))
	{
		stopSCCB();
		return(0);
	}
	Delay_nUS(100);
  	*regDat=SCCBreadByte();
  	noAck();
  	stopSCCB();
  	return(1);
}




/* OV7670_init() */
//返回1成功，返回0失败
uchar OV7670_init(void)
{
	uchar temp;
	
	uint i=0;

	
	InitSCCB();//io init..

	temp=0x80;
	if(0==wrOV7670Reg(0x12, temp)) //Reset SCCB
	{
		return 0 ;
		
	}
	while(0)
	{
		rdOV7670Reg(0x1C, &temp);
		//UART_Transmit(temp);
		Delay_nMS(100);
	}
	Delay_nMS(10);

	for(i=0;i<CHANGE_REG_NUM;i++)
	{
		if( 0 == wrOV7670Reg (change_reg[i][0],change_reg[i][1])   )
		{
			return 0;
		}
	}

	return 0x01; //ok

	
}