I2C_IIC

5 在使用ov7725摄像头遇到的问题?

发布于 2022-05-09 22:04:34 浏览：716 订阅该版

1 个回答

勇敢的春 2022-05-09

这家伙很懒，什么也没写！

勇敢的春 2022-05-09

这家伙很懒，什么也没写！

```c
#include "bsp_ov7725.h"
#include <rtthread.h>
#include"../libraries/ls1c_gpio.h"
#include"../libraries/ls1c_delay.h"
#include <rthw.h>
#include "mipsregs.h" 
#include "ls1c.h"  
#include <stdio.h>

#include "GUI.h"
#include "drv_st7735.h"
#include "suse.h"

#include "test_tft.h"

#include "hw_i2c.h"

#define WHITE	0xffff

//以下引脚定义宏为fifo所需引脚,所配置引脚位为随意配置,具体引脚等到硬件到的时候再决定
#define OE 74
#define WRST 67
#define RRST 77
#define RCLK 59
#define WE 69
#define DATA_0 76
#define DATA_1 75
#define DATA_2 58
#define DATA_3 60
#define DATA_4 62
#define DATA_5 64
#define DATA_6 66
#define DATA_7 68
#define VSYNC 28//vsync要配置成中断模式

rt_uint8_t get_data(void)
{
	rt_uint8_t pic;
	rt_uint8_t buf[8];
	buf[0]=gpio_get(DATA_0);
	buf[1]=gpio_get(DATA_1);
	buf[2]=gpio_get(DATA_2);
	buf[3]=gpio_get(DATA_3);
	buf[4]=gpio_get(DATA_4);
	buf[5]=gpio_get(DATA_5);
	buf[6]=gpio_get(DATA_6);
	buf[7]=gpio_get(DATA_7);
	//for(pic=0;pic<8;pic++)
	//{
		//rt_kprintf("%d",buf[pic]);
	//}
	int i;
	for(i=0;i<8;i++)
	{
	pic |= buf[i]<<i;	
	}
	//rt_kprintf("  ");
	//rt_kprintf("pic=ox%x ",pic);
	//rt_kprintf("pic=ox%d ",pic);
	//rt_thread_delay(6);
	return pic;

}

//摄像头初始化配置
//注意：使用这种方式初始化结构体，要在c/c++选项中选择 C99 mode
OV7725_MODE_PARAM cam_mode =
{
	
/*以下包含几组摄像头配置，可自行测试，保留一组，把其余配置注释掉即可*/
/************配置1*********横屏显示*****************************/
	
	// .QVGA_VGA = 0,	//QVGA模式
	// .cam_sx = 0,
	// .cam_sy = 0,	
	
	// .cam_width = 128,
	// .cam_height = 160,
	
	// .lcd_sx = 0,
	// .lcd_sy = 0,
	// .lcd_scan = 3, //LCD扫描模式，本横屏配置可用1、3、5、7模式
	
	// //以下可根据自己的需要调整，参数范围见结构体类型定义	
	// .light_mode = 0,//自动光照模式
	// .saturation = 0,	
	// .brightness = 0,
	// .contrast = 0,
	// .effect = 0,		//正常模式
	
	
/**********配置2*********竖屏显示****************************/	
/*竖屏显示需要VGA模式，同分辨率情况下，比QVGA帧率稍低*/
/*VGA模式分辨率为640*480，从中取出240*320的图像进行竖屏显示*/
/*本工程不支持超过320*240或 240*320的分辨率配置*/

.QVGA_VGA = 1,	//VGA模式
	//取VGA模式居中的窗口，可根据实际需要调整
	.cam_sx = 0,
	.cam_sy = 0,	
	
	.cam_width = 128, 
	.cam_height = 160, //在VGA模式下，此值才可以大于240
	
	.lcd_sx = 0,
	.lcd_sy = 0,
	.lcd_scan = 0, //LCD扫描模式，本竖屏配置可用0、2、4、6模式
	
	//以下可根据自己的需要调整，参数范围见结构体类型定义
	.light_mode = 0,//自动光照模式
	.saturation = 0,	
	.brightness = 0,
	.contrast = 0,
	.effect = 0,		//正常模式
	
	
	/*******配置3************小分辨率****************************/	
	/*小于320*240分辨率的，可使用QVGA模式,设置的时候注意液晶屏边界*/
	
	// .QVGA_VGA = 0,	//QVGA模式
	// //取QVGA模式居中的窗口，可根据实际需要调整
	// .cam_sx = 100,
	// .cam_sy = 45,	
	
	// .cam_width = 128, 
	// .cam_height = 160, 
	
	// /*液晶屏的显示位置也可以根据需要调整，注意不要超过边界即可*/
	// .lcd_sx = 50,
	// .lcd_sy = 50,
	// .lcd_scan = 3, //LCD扫描模式，0-7模式都支持，注意不要超过边界即可

// //以下可根据自己的需要调整，参数范围见结构体类型定义	
	// .light_mode = 0,//自动光照模式
	// .saturation = 0,	
	// .brightness = 0,
	// .contrast = 0,
	// .effect = 0,		//正常模式

};

typedef struct Reg
{
	rt_uint8_t Address;			       /*寄存器地址*/
	rt_uint8_t Value;		           /*寄存器值*/
}Reg_Info;

/* 寄存器参数配置 */
Reg_Info Sensor_Config[] =
{
	{REG_CLKRC,     0x00}, /*clock config*/
	{REG_COM7,      0x46}, /*QVGA RGB565 */
	{REG_HSTART,    0x3f},
	{REG_HSIZE,     0x50},
	{REG_VSTRT,     0x03},
	{REG_VSIZE,     0x78},
	{REG_HREF,      0x00},
	{REG_HOutSize,  0x50},
	{REG_VOutSize,  0x78},
	{REG_EXHCH,     0x00},

/*DSP control*/
	{REG_TGT_B,     0x7f},
	{REG_FixGain,   0x09},
	{REG_AWB_Ctrl0, 0xe0},
	{REG_DSP_Ctrl1, 0xff},
	{REG_DSP_Ctrl2, 0x20},
	{REG_DSP_Ctrl3,	0x00},
	{REG_DSP_Ctrl4, 0x00},

/*AGC AEC AWB*/
	{REG_COM8,		0xf0},//...........................
	{REG_COM4,		0x81}, /*Pll AEC CONFIG*/
	{REG_COM6,		0xc5},
	{REG_COM9,		0x21},//............................
	{REG_BDBase,	0xFF},
	{REG_BDMStep,	0x01},
	{REG_AEW,		0x34},
	{REG_AEB,		0x3c},
	{REG_VPT,		0xa1},
	{REG_EXHCL,		0x00},
	{REG_AWBCtrl3,  0xaa},
	{REG_COM8,		0xff},
	{REG_AWBCtrl1,  0x5d},

{REG_EDGE1,		0x0a},
	{REG_DNSOff,	0x01},
	{REG_EDGE2,		0x01},
	{REG_EDGE3,		0x01},

{REG_MTX1,		0x5f},
	{REG_MTX2,		0x53},
	{REG_MTX3,		0x11},
	{REG_MTX4,		0x1a},
	{REG_MTX5,		0x3d},
	{REG_MTX6,		0x5a},
	{REG_MTX_Ctrl,  0x1e},

{REG_BRIGHT,	0x00},
	{REG_CNST,		0x25},
	{REG_USAT,		0x65},
	{REG_VSAT,		0x65},
	{REG_UVADJ0,	0x81},
	//{REG_SDE,		  0x20},	//黑白
	{REG_SDE,		  0x06},	//彩色	调节SDE这个寄存器还可以实现其他效果
	
    /*GAMMA config*/
	{REG_GAM1,		0x0c},
	{REG_GAM2,		0x16},
	{REG_GAM3,		0x2a},
	{REG_GAM4,		0x4e},
	{REG_GAM5,		0x61},
	{REG_GAM6,		0x6f},
	{REG_GAM7,		0x7b},
	{REG_GAM8,		0x86},
	{REG_GAM9,		0x8e},
	{REG_GAM10,		0x97},
	{REG_GAM11,		0xa4},
	{REG_GAM12,		0xaf},
	{REG_GAM13,		0xc5},
	{REG_GAM14,		0xd7},
	{REG_GAM15,		0xe8},
	{REG_SLOP,		0x20},

{REG_HUECOS,	0x80},
	{REG_HUESIN,	0x80},
	{REG_DSPAuto,	0xff},
	{REG_DM_LNL,	0x00},
	{REG_BDBase,	0x99},
	{REG_BDMStep,	0x03},
	{REG_LC_RADI,	0x00},
	{REG_LC_COEF,	0x13},
	{REG_LC_XC,		0x08},
	{REG_LC_COEFB,  0x14},
	{REG_LC_COEFR,  0x17},
	{REG_LC_CTR,	0x05},
	
	{REG_COM3,		0xd0},/*Horizontal mirror image*/

/*night mode auto frame rate control*/
	//{REG_COM5,		0xf5},	 /*在夜视环境下，自动降低帧率，保证低照度画面质量*/
	{REG_COM5,		0x31},	/*夜视环境帧率不变*/
};

rt_uint8_t OV7725_REG_NUM = sizeof(Sensor_Config)/sizeof(Sensor_Config[0]);	  /*结构体数组成员数目*/

volatile rt_uint8_t Ov7725_vsync ;	 /* 帧同步信号标志，在中断函数和main函数里面使用 */

/************************************************
 * 函数名：FIFO_GPIO_Config
 * 描述  ：FIFO GPIO配置
 * 输入  ：无
 * 输出  ：无
 * 注意  ：无
 ************************************************/
static void FIFO_GPIO_Config(void)
{
    //八位数据口
    gpio_init(DATA_0,gpio_mode_input);
    gpio_init(DATA_1,gpio_mode_input);
    gpio_init(DATA_2,gpio_mode_input);
    gpio_init(DATA_3,gpio_mode_input);
    gpio_init(DATA_4,gpio_mode_input);
    gpio_init(DATA_5,gpio_mode_input);
    gpio_init(DATA_6,gpio_mode_input);
    gpio_init(DATA_7,gpio_mode_input);

gpio_init(OE,gpio_mode_output);
    gpio_init(WRST,gpio_mode_output);
    gpio_init(RCLK,gpio_mode_output);
    gpio_init(WE,gpio_mode_output);

FIFO_OE_L();	  					/*拉低使FIFO输出使能*/
    FIFO_WE_H();   						/*拉高使FIFO写允许*/

}

void  VSYNC_handle(int irq, void *param) ////vsync中断处理函数
{
	//     if ( EXTI_GetITStatus(OV7725_VSYNC_EXTI_LINE) != RESET ) 	//检查EXTI_Line0线路上的中断请求是否发送到了NVIC 
    // {
		//rt_kprintf("vsync中断处理函数\n");
        if( Ov7725_vsync == 0 )
        {
            FIFO_WRST_L(); 	                      //拉低使FIFO写(数据from摄像头)指针复位
            FIFO_WE_H();	                        //拉高使FIFO写允许
            
            Ov7725_vsync = 1;	   	
            FIFO_WE_H();                          //使FIFO写允许
            FIFO_WRST_H();                        //允许使FIFO写(数据from摄像头)指针运动
        }
        else if( Ov7725_vsync == 1 )
        {
            FIFO_WE_L();                          //拉低使FIFO写暂停
            Ov7725_vsync = 2;
        }        
        // EXTI_ClearITPendingBit(OV7725_VSYNC_EXTI_LINE);		    //清除EXTI_Line0线路挂起标志位        
    // }

}

/************************************************
 * 函数名：VSYNC_GPIO_Config
 * 描述  ：OV7725 VSYNC中断相关配置
 * 输入  ：无
 * 输出  ：无
 * 注意  ：无
 ************************************************/
static void VSYNC_GPIO_Config(void)
{
    //初始化vsync中断
    int VSYNC_irq = LS1C_GPIO_TO_IRQ(VSYNC);  
    gpio_set_irq_type(VSYNC, IRQ_TYPE_EDGE_FALLING);  
    rt_hw_interrupt_install(VSYNC_irq, VSYNC_handle, RT_NULL, "VSYNC");  
    rt_hw_interrupt_umask(VSYNC_irq);  
    gpio_init(VSYNC, gpio_mode_input);  
    //rt_kprintf("VSYNC interupt init succ \r\n", VSYNC_irq);
}

/************************************************
 * 函数名：OV7725_GPIO_Config
 * 描述  ：初始化控制摄像头相接的IO
 * 输入  ：无
 * 输出  ：无
 * 注意  ：无
 ************************************************/
void OV7725_GPIO_Config(void)
{
	i2c_Config();
	FIFO_GPIO_Config();
	VSYNC_GPIO_Config();
	
}
/**
  * @brief  ÉèÖÃ¹âÕÕ¶È
	* @param  bri:¹âÕÕ¶È£¬²ÎÊý·¶Î§[-4~+4]
  * @retval ÎÞ
  */
void OV7725_Brightness(rt_int8_t bri)
{
	rt_uint8_t BRIGHT_Value,SIGN_Value;	
	
	switch(bri)
	{
		case 4:
				BRIGHT_Value = 0x48;
				SIGN_Value = 0x06;
			break;
		
		case 3:
				BRIGHT_Value = 0x38;
				SIGN_Value = 0x06;		
		break;	
		
		case 2:
				BRIGHT_Value = 0x28;
				SIGN_Value = 0x06;			
		break;	
		
		case 1:
				BRIGHT_Value = 0x18;
				SIGN_Value = 0x06;			
		break;	
		
		case 0:
				BRIGHT_Value = 0x08;
				SIGN_Value = 0x06;			
		break;	
		
		case -1:
				BRIGHT_Value = 0x08;
				SIGN_Value = 0x0e;		
		break;	
		
		case -2:
				BRIGHT_Value = 0x18;
				SIGN_Value = 0x0e;		
		break;	
		
		case -3:
				BRIGHT_Value = 0x28;
				SIGN_Value = 0x0e;		
		break;	
		
		case -4:
				BRIGHT_Value = 0x38;
				SIGN_Value = 0x0e;		
		break;	
		
		default:
			OV7725_DEBUG("Brightness parameter error!");
			break;
	}

i2c_WriteByte(REG_BRIGHT, BRIGHT_Value); //AWB on
		i2c_WriteByte(REG_SIGN, SIGN_Value);
}

/************************************************
 * 函数名：Sensor_Init
 * 描述  ：Sensor初始化
 * 输入  ：无
 * 输出  ：返回1成功，返回0失败
 * 注意  ：无
 ************************************************/
int OV7725_Init(void)
{
	rt_uint16_t i = 0;
	rt_uint8_t Sensor_IDCode = 0;	
	// 	if( 0 == i2c_ReadByte( &Sensor_IDCode, 1, 0x0b ) )	 /* 读取sensor ID号*/
	// {
	// 	rt_kprintf("read id faild\n");		
	// 	//return ERROR;
	// }
	// rt_kprintf("Sensor ID is 0x%x\n", Sensor_IDCode);
	rt_kprintf("ov7725 Register Config Start......\n");
	
	if( 0 == i2c_WriteByte ( 0x12, 0x80 ) ) /*复位sensor */
	{
		rt_kprintf("sccb write data error\n");		
		return ERROR ;
	}	
	rt_thread_delay(20);
	if( 0 == i2c_ReadByte( &Sensor_IDCode, 1, 0x0b ) )	 /* 读取sensor ID号*/
	{

rt_kprintf("read id faild\n");		
		return ERROR;
	}
	rt_kprintf("Sensor ID is 0x%x\n", Sensor_IDCode);	
	
	if(Sensor_IDCode == OV7725_ID)
	{
		//rt_kprintf("Sensor_IDCode == OV7725_ID\n");
		for( i = 0 ; i < OV7725_REG_NUM ; i++ )
		{
			
			if( 0 == i2c_WriteByte(Sensor_Config[i].Address, Sensor_Config[i].Value) )
			{                
				rt_kprintf("write reg faild", Sensor_Config[i].Address);
				return ERROR;
			}
			rt_thread_delay(6);
			
			//  i2c_ReadByte( &Sensor_IDCode, 1, Sensor_Config[i].Address );
            //  rt_kprintf("Sensor ID is 0x%x\n", Sensor_IDCode);
			//  if(Sensor_Config[i].Value!=Sensor_IDCode)
			//  {
			//  rt_kprintf("write reg faild\n", Sensor_Config[i].Address);	
			//  }
		}
		for( i = 0 ; i < OV7725_REG_NUM ; i++ )
		{
			i2c_ReadByte( &Sensor_IDCode, 1, Sensor_Config[i].Address );
             rt_kprintf("reg is 0x%x\n", Sensor_IDCode);
			 int cc=0;
			//  while(Sensor_Config[i].Value!=Sensor_IDCode)
			//  {
			// 	 cc++;
			// 	 if(cc==30)
			// 	 {
			// 		 return;
			// 	 }
			// 	  //rt_kprintf("                        write reg faild reg=%x\n", Sensor_IDCode);
			// 	  i2c_WriteByte(Sensor_Config[i].Address, Sensor_Config[i].Value);
			// 	  i2c_ReadByte( &Sensor_IDCode, 1, Sensor_Config[i].Address );
			// 	  if(Sensor_Config[i].Value!=Sensor_IDCode)
			// 	  {
			// 		  rt_kprintf("                   cc=%d write reg faild reg=%x\n",cc, Sensor_IDCode);
			// 	  }
			// 	  else
			// 	  {
			// 		  rt_kprintf("                   cc=%d write reg succ reg=%x\n",cc, Sensor_IDCode);
			// 	  }
			//  }
		}
		 for( i = 0 ; i < OV7725_REG_NUM ; i++ )
		 {
		 	i2c_ReadByte( &Sensor_IDCode, 1, Sensor_Config[i].Address );
		 	if(Sensor_Config[i].Value!=Sensor_IDCode)
		 	{
		 		rt_kprintf("******* write reg faild reg=%x\n", Sensor_IDCode);
		 	}

}
		 rt_kprintf("*******************************************************\n");
		 		 for( i = 0 ; i < OV7725_REG_NUM ; i++ )
		 {
		 	i2c_ReadByte( &Sensor_IDCode, 1, Sensor_Config[i].Address );
		 	if(Sensor_Config[i].Value!=Sensor_IDCode)
		 	{
		 		rt_kprintf("******* write reg faild reg=%x\n", Sensor_IDCode);
		 	}

}
	}
	
	else
	{
		return ERROR;
	}
	//rt_kprintf("ov7725 Register Config Success");
	
	return SUCCESS;
}

/**
  * @brief  设置光照模式
  * @param  mode :光照模式，参数范围[0~5]
			@arg 0:自动
			@arg 1:晴天
			@arg 2:多云
			@arg 3:办公室
			@arg 4:家里
			@arg 5:夜晚
  * @retval 无
  */
void OV7725_Light_Mode(rt_uint8_t mode)
{
	switch(mode)
	{
		case 0:	//Auto，自动模式
			i2c_WriteByte(0x13, 0xff); //AWB on 
			i2c_WriteByte(0x0e, 0x65);
			i2c_WriteByte(0x2d, 0x00);
			i2c_WriteByte(0x2e, 0x00);
			break;
		case 1://sunny，晴天
			i2c_WriteByte(0x13, 0xfd); //AWB off
			i2c_WriteByte(0x01, 0x5a);
			i2c_WriteByte(0x02, 0x5c);
			i2c_WriteByte(0x0e, 0x65);
			i2c_WriteByte(0x2d, 0x00);
			i2c_WriteByte(0x2e, 0x00);
			break;	
		case 2://cloudy，多云
			i2c_WriteByte(0x13, 0xfd); //AWB off
			i2c_WriteByte(0x01, 0x58);
			i2c_WriteByte(0x02, 0x60);
			i2c_WriteByte(0x0e, 0x65);
			i2c_WriteByte(0x2d, 0x00);
			i2c_WriteByte(0x2e, 0x00);
			break;	
		case 3://office，办公室
			i2c_WriteByte(0x13, 0xfd); //AWB off
			i2c_WriteByte(0x01, 0x84);
			i2c_WriteByte(0x02, 0x4c);
			i2c_WriteByte(0x0e, 0x65);
			i2c_WriteByte(0x2d, 0x00);
			i2c_WriteByte(0x2e, 0x00);
			break;	
		case 4://home，家里
			i2c_WriteByte(0x13, 0xfd); //AWB off
			i2c_WriteByte(0x01, 0x96);
			i2c_WriteByte(0x02, 0x40);
			i2c_WriteByte(0x0e, 0x65);
			i2c_WriteByte(0x2d, 0x00);
			i2c_WriteByte(0x2e, 0x00);
			break;	
		
		case 5://night，夜晚
			i2c_WriteByte(0x13, 0xff); //AWB on
			i2c_WriteByte(0x0e, 0xe5);
			break;	
		
		default:
			 OV7725_DEBUG("Light Mode parameter error!");

break;
	}

}

/**
  * @brief  ÉèÖÃ±¥ºÍ¶È
  * @param  sat:±¥ºÍ¶È,²ÎÊý·¶Î§[-4 ~ +4]             	
  * @retval ÎÞ
  */
void OV7725_Color_Saturation(rt_int8_t sat)
{

if(sat >=-4 && sat<=4)
	{	
		i2c_WriteByte(REG_USAT, (sat+4)<<4); 
		i2c_WriteByte(REG_VSAT, (sat+4)<<4);
	}
	else
	{
		OV7725_DEBUG("Color Saturation parameter error!");
	}
	
}

/**
  * @brief  设置对比度
	* @param  cnst:对比度，参数范围[-4~+4]
  * @retval 无
  */
void OV7725_Contrast(rt_int8_t cnst)
{
	if(cnst >= -4 && cnst <=4)
	{
		i2c_WriteByte(REG_CNST, (0x30-(4-cnst)*4));
	}
	else
	{
		OV7725_DEBUG("Contrast parameter error!");
	}
}

/**
  * @brief  设置特殊效果
	* @param  eff:特殊效果，参数范围[0~6]:
			@arg 0:正常
			@arg 1:黑白
			@arg 2:偏蓝
			@arg 3:复古
			@arg 4:偏红
			@arg 5:偏绿
			@arg 6:反相
  * @retval 无
  */
void OV7725_Special_Effect(rt_uint8_t eff)
{
	switch(eff)
	{
		case 0://正常
			i2c_WriteByte(0xa6, 0x06);
			i2c_WriteByte(0x60, 0x80);
			i2c_WriteByte(0x61, 0x80);
		break;
		
		case 1://黑白
			i2c_WriteByte(0xa6, 0x26);
			i2c_WriteByte(0x60, 0x80);
			i2c_WriteByte(0x61, 0x80);
		break;	
		
		case 2://偏蓝
			i2c_WriteByte(0xa6, 0x1e);
			i2c_WriteByte(0x60, 0xa0);
			i2c_WriteByte(0x61, 0x40);	
		break;	
		
		case 3://复古
			i2c_WriteByte(0xa6, 0x1e);
			i2c_WriteByte(0x60, 0x40);
			i2c_WriteByte(0x61, 0xa0);	
		break;	
		
		case 4://偏红
			i2c_WriteByte(0xa6, 0x1e);
			i2c_WriteByte(0x60, 0x80);
			i2c_WriteByte(0x61, 0xc0);		
		break;	
		
		case 5://偏绿
			i2c_WriteByte(0xa6, 0x1e);
			i2c_WriteByte(0x60, 0x60);
			i2c_WriteByte(0x61, 0x60);		
		break;	
		
		case 6://反相
			i2c_WriteByte(0xa6, 0x46);
		break;	
				
		default:
			OV7725_DEBUG("Special Effect error!");
			break;
	}
}

/**
  * @brief  设置图像输出窗口（分辨率）QVGA
	* @param  sx:窗口x起始位置
	* @param  sy:窗口y起始位置
	* @param  width:窗口宽度
	* @param  height:窗口高度
	* @param QVGA_VGA:0,QVGA模式，1，VGA模式
  *
	* @note 	QVGA模式 参数要求，sx + width <= 320 ,sy+height <= 240
	* 			 	VGA模式参数要求，sx + width <= 640 ,sy+height <= 480
	*					但由于 液晶屏分辨率 和 FIFO空间 的限制，本工程不适用于超过320*240的配置
	*         使用VGA模式主要是因为OV7725无法直接交换XY方向，QVGA不方便使用竖平显示，
	*					设置成VGA模式，可以使用竖屏显示，
	*					相对QVGA模式，同样分辨率下 VGA模式 图像采样帧率稍慢
  * @retval 无
  */
void OV7725_Window_Set(rt_uint16_t sx,rt_uint16_t sy,rt_uint16_t width,rt_uint16_t height,rt_uint8_t QVGA_VGA)
{
	rt_uint8_t reg_raw,cal_temp;

/***********QVGA or VGA *************/
	if(QVGA_VGA == 0)
	{
		/*QVGA RGB565 */
		i2c_WriteByte(REG_COM7,0x46); 
	}
	else
	{
			/*VGA RGB565 */
		i2c_WriteByte(REG_COM7,0x06); 
	}

/***************HSTART*********************/
	//读取寄存器的原内容，HStart包含偏移值，在原始偏移植的基础上加上窗口偏移	
	i2c_ReadByte(®_raw,1,REG_HSTART);
	
	//sx为窗口偏移，高8位存储在HSTART，低2位在HREF
	cal_temp = (reg_raw + (sx>>2));	
	i2c_WriteByte(REG_HSTART,cal_temp ); 
	
	/***************HSIZE*********************/
	//水平宽度，高8位存储在HSIZE，低2位存储在HREF
	i2c_WriteByte(REG_HSIZE,width>>2);//HSIZE左移两位 
	
	
	/***************VSTART*********************/
	//读取寄存器的原内容，VStart包含偏移值，在原始偏移植的基础上加上窗口偏移	
	i2c_ReadByte(®_raw,1,REG_VSTRT);	
	//sy为窗口偏移，高8位存储在HSTART，低1位在HREF
	cal_temp = (reg_raw + (sy>>1));	
	
	i2c_WriteByte(REG_VSTRT,cal_temp);
	
	/***************VSIZE*********************/
	//垂直高度，高8位存储在VSIZE，低1位存储在HREF
	i2c_WriteByte(REG_VSIZE,height>>1);//VSIZE左移一位
	
	/***************VSTART*********************/
	//读取寄存器的原内容	
	i2c_ReadByte(®_raw,1,REG_HREF);	
	//把水平宽度的低2位、垂直高度的低1位，水平偏移的低2位，垂直偏移的低1位的配置添加到HREF
	cal_temp = (reg_raw |(width&0x03)|((height&0x01)<<2)|((sx&0x03)<<4)|((sy&0x01)<<6));	
	
	i2c_WriteByte(REG_HREF,cal_temp);
	
	/***************HOUTSIZIE /VOUTSIZE*********************/
	i2c_WriteByte(REG_HOutSize,width>>2);
	i2c_WriteByte(REG_VOutSize,height>>1);
	
	//读取寄存器的原内容	
	i2c_ReadByte(®_raw,1,REG_EXHCH);	
	cal_temp = (reg_raw |(width&0x03)|((height&0x01)<<2));

i2c_WriteByte(REG_EXHCH,cal_temp);	
}

/**
  * @brief  设置图像输出窗口（分辨率）VGA
	* @param  sx:窗口x起始位置
	* @param  sy:窗口y起始位置
	* @param  width:窗口宽度
	* @param  height:窗口高度
	* @note 	本函数参数要求，sx + width <= 640 ,sy+height <= 480
	*					但由于 液晶屏分辨率 和 FIFO空间 的限制，本工程不适用于超过320*240的配置
	*         使用本函数主要是因为OV7725无法直接交换XY方向，QVGA不方便使用竖平显示，
	*					使用本函数设置成VGA模式，可以使用竖屏显示，
	*					相对QVGA模式，同样分辨率下 VGA模式 图像采样帧率稍慢
  * @retval 无
  */
void OV7725_Window_VGA_Set(rt_uint16_t sx,rt_uint16_t sy,rt_uint16_t width,rt_uint16_t height)
{
	
	rt_uint8_t reg_raw,cal_temp;

/***********QVGA or VGA *************/
	/*VGA RGB565 */
	i2c_WriteByte(REG_COM7,0x06);

/***************HSTART*********************/
	//读取寄存器的原内容，HStart包含偏移值，在原始偏移植的基础上加上窗口偏移	
	i2c_ReadByte(®_raw,1,REG_HSTART);
	
	//sx为窗口偏移，高8位存储在HSTART，低2位在HREF
	cal_temp = (reg_raw + (sx>>2));	
	i2c_WriteByte(REG_HSTART,cal_temp ); 
	
	/***************HSIZE*********************/
	//水平宽度，高8位存储在HSIZE，低2位存储在HREF
	i2c_WriteByte(REG_HSIZE,width>>2);//HSIZE左移两位 320 
	
	
	/***************VSTART*********************/
	//读取寄存器的原内容，VStart包含偏移值，在原始偏移植的基础上加上窗口偏移	
	i2c_ReadByte(®_raw,1,REG_VSTRT);	
	//sy为窗口偏移，高8位存储在HSTART，低1位在HREF
	cal_temp = (reg_raw + (sy>>1));	
	
	i2c_WriteByte(REG_VSTRT,cal_temp);
	
	/***************VSIZE*********************/
	//垂直高度，高8位存储在VSIZE，低1位存储在HREF
	i2c_WriteByte(REG_VSIZE,height>>1);//VSIZE左移一位 240
	
	/***************VSTART*********************/
	//读取寄存器的原内容	
	i2c_ReadByte(®_raw,1,REG_HREF);	
	//把水平宽度的低2位、垂直高度的低1位，水平偏移的低2位，垂直偏移的低1位的配置添加到HREF
	cal_temp = (reg_raw |(width&0x03)|((height&0x01)<<2)|((sx&0x03)<<4)|((sy&0x01)<<6));	
	
	i2c_WriteByte(REG_VSTRT,cal_temp);
	
	/***************HOUTSIZIE /VOUTSIZE*********************/
	i2c_WriteByte(REG_HOutSize,width>>2);
	i2c_WriteByte(REG_VOutSize,height>>1);
	
	//读取寄存器的原内容	
	i2c_ReadByte(®_raw,1,REG_EXHCH);	
	
	cal_temp = (reg_raw |(width&0x03)|((height&0x01)<<2));

i2c_WriteByte(REG_EXHCH,cal_temp);	
}

/**
  * @brief  设置显示位置
	* @param  sx:x起始显示位置
	* @param  sy:y起始显示位置
	* @param  width:显示窗口宽度,要求跟OV7725_Window_Set函数中的width一致
	* @param  height:显示窗口高度，要求跟OV7725_Window_Set函数中的height一致
  * @retval 无
  */
  rt_uint8_t pic_l;
  rt_uint8_t pic_h;
void ImagDisp(void)
{ 
	int i;
	rt_uint16_t RGB565;
	//LCD_Clear(WHITE);
	//rt_thread_delay(1000);
	//rt_kprintf("这里全屏变白\n");
	Lcd_SetRegion(0,0,127,159);
		for(i = 0; i < 160; i++)
		{
		for(int j=0;j<128;j++)
		{
			
				                    RGB565=0;
	                                FIFO_RCLK_L();

pic_l=get_data();
	                                RGB565 = (pic_l) & 0xff00;
	                                FIFO_RCLK_H();
                                    FIFO_RCLK_L();

pic_h=get_data();
									RGB565 |= (pic_h) & 0x00ff;
	                                //RGB565 = (pic_h <<8) | pic_l;
	                                FIFO_RCLK_H();
									//rt_kprintf("pic_l=%x ",pic_l);
									//rt_kprintf("pic_h=%x ",pic_h);
								 //rt_kprintf("RGB565=0x%x \n",RGB565);
					/* 从FIFO读出一个rgb565像素到Camera_Data变量 */
			
			lcd_write_data_16(RGB565);//液晶屏使用的不一样,所以这里注释掉
			//rt_thread_delay(500);
		}
		//rt_kprintf("\n");

}

//rt_thread_delay(3000);
}
//定义图像数组全局变量
rt_uint16_t pic[128][160]={0};
void get_pic(void)
{
	int i,j;
	rt_uint16_t Camera_Data;
	for(i=0;i<128;i++)
		for(j=0;j<160;j++)
		{
			READ_FIFO_PIXEL(Camera_Data);
			pic[i][j]=Camera_Data;
		}

}

void ov(void)
{
	  int frame_count=0;
	tft_init();
	showimage(gImage_suse);//开机动画
	OV7725_GPIO_Config();
	int retry=0;
	while(OV7725_Init()!=SUCCESS)
	{
		retry++;
		if(retry==5)
		{
			rt_kprintf("init ov7725 failed....\n");
			return;
		}
	}
		
	OV7725_Special_Effect(cam_mode.effect);
	
	OV7725_Light_Mode(cam_mode.light_mode);
	
	OV7725_Color_Saturation(cam_mode.saturation);
	
	OV7725_Brightness(cam_mode.brightness);
	
	OV7725_Contrast(cam_mode.contrast);
	
	OV7725_Special_Effect(cam_mode.effect);
	
	
	OV7725_Window_Set(									cam_mode.cam_sx,
														cam_mode.cam_sy,
														cam_mode.cam_width,
														cam_mode.cam_height,
														cam_mode.QVGA_VGA);
	//OV7725_Window_VGA_Set(0,0,127,159);
	Ov7725_vsync = 0;
		while(1)
	{
		
		if( Ov7725_vsync == 2 )
		{
		   frame_count++;

rt_kprintf("frame_count=%d  \n",frame_count);
		   	if(frame_count==10)
		   {return;}
			FIFO_PREPARE;  								
			ImagDisp();
			//rt_thread_delay(3000);
			rt_uint8_t Sensor_IDCode = 0;
			for(int  i = 0 ; i < OV7725_REG_NUM ; i++ )
		 {
		 	i2c_ReadByte( &Sensor_IDCode, 1, Sensor_Config[i].Address );
		 	if(Sensor_Config[i].Value!=Sensor_IDCode)
		 	{
		 		rt_kprintf("******* write reg faild reg=%x\n", Sensor_IDCode);
		 	}

}
			Ov7725_vsync = 0;			
			//LED1_TOGGLE;

}
	}

}

MSH_CMD_EXPORT(ov, ov7725 test);
```