OV7670时序问题

liuzheng081

求OV7670工作时序  数据手册上看不到  求高人讲解  谢谢

正点原子

先sccb初始化，然后就读数据就ok了

daiqh

看附件

liuzheng081

回复【2楼】正点原子:
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回复【3楼】daiqh:
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请问  对于摄像头的系统时钟  我给出8MHZ的时钟  会输出PCLK  行同步  帧同步等信号  这些不用考虑吗

正点原子

可以输出pclk，行同步和祯同步都是要考虑的

daiqh

回复【4楼】liuzheng081:
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这些都是重要参数,当然要考虑.对着电路的连接再细看OV7670时序就知道了

正点原子

既然楼上传了资料,我也来一点.

daiqh

回复【7楼】正点原子:
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呵呵,原子哥,这东西ourdev那边多人玩一点

正点原子

是的,那边wangguanfu玩的很欢...

liuzheng081

回复【9楼】正点原子:
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可是我在那个论坛中下不了资料  

liuzheng081

回复【9楼】正点原子:
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u8 OV7670_Init(void)
 {
  u8 temp=0,num;
u16 ID;
SCCB_GPIO_Init();
  OV7670_GPIO_Init();

if(OV7670_WR_REG(REG_COM7,COM7_RESET)==1)//复位SCCB寄存器
{
return 1; //复位失败
}
for(num=0;num<OV7670_REG_NUM;num++)
{
if(OV7670_WR_REG(OV7670_REG[num][0],OV7670_REG[num][1])==1)
{
return 1;//返回错误
}
}
原子老师  您看这个OV7670的初始化程序，总是在对OV7670的寄存器初始化时出错  是怎么回事啊？？
const  char OV7670_REG[OV7670_REG_NUM][2]=
 {  
    /*以下为OV7670 QVGA RGB565参数  */
   {0x3a, 0x04},//
{0x40, 0x10},
{0x12, 0x14},
{0x32, 0x80},
{0x17, 0x16},
        
{0x18, 0x04},//5
{0x19, 0x02},
{0x1a, 0x7b},//0x7a,
{0x03, 0x06},//0x0a,
{0x0c, 0x0c},
    {0x15, 0x02},
{0x3e, 0x00},//10
{0x70, 0x00},
{0x71, 0x01},//0x81彩条测试
{0x72, 0x11},
{0x73, 0x09},//
        
{0xa2, 0x02},//15
{0x11, 0x00},
{0x7a, 0x20},
{0x7b, 0x1c},
{0x7c, 0x28},
        
{0x7d, 0x3c},//20
{0x7e, 0x55},
{0x7f, 0x68},
{0x80, 0x76},
{0x81, 0x80},
        
{0x82, 0x88},
{0x83, 0x8f},
{0x84, 0x96},
{0x85, 0xa3},
{0x86, 0xaf},
        
{0x87, 0xc4},//30
{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},//40
{0x25, 0x63},
{0x26, 0xA5},
{0x9f, 0x78},
{0xa0, 0x68},
        
{0xa1, 0x03},//0x0b,
{0xa6, 0xdf},//0xd8,
{0xa7, 0xdf},//0xd8,
{0xa8, 0xf0},
{0xa9, 0x90},
        
{0xaa, 0x94},//50
{0x13, 0xe5},
{0x0e, 0x61},
{0x0f, 0x4b},
{0x16, 0x02},
        
{0x1e, 0x27},//0x07,
{0x21, 0x02},
{0x22, 0x91},
{0x29, 0x07},
{0x33, 0x0b},
        
{0x35, 0x0b},//60
{0x37, 0x1d},
{0x38, 0x71},
{0x39, 0x2a},
{0x3c, 0x78},
        
{0x4d, 0x40},
{0x4e, 0x20},
{0x69, 0x5d},
{0x6b, 0x00},//PLL
{0x74, 0x19},
{0x8d, 0x4f},
        
{0x8e, 0x00},//70
{0x8f, 0x00},
{0x90, 0x00},
{0x91, 0x00},
{0x92, 0x00},//0x19,//0x66
        
{0x96, 0x00},
{0x9a, 0x80},
{0xb0, 0x84},
{0xb1, 0x0c},
{0xb2, 0x0e},
        
{0xb3, 0x82},//80
{0xb8, 0x0a},
{0x43, 0x14},
{0x44, 0xf0},
{0x45, 0x34},
        
{0x46, 0x58},
{0x47, 0x28},
{0x48, 0x3a},
{0x59, 0x88},
{0x5a, 0x88},
        
{0x5b, 0x44},//90
{0x5c, 0x67},
{0x5d, 0x49},
{0x5e, 0x0e},
{0x64, 0x04},
{0x65, 0x20},
        
{0x66, 0x05},
{0x94, 0x04},
{0x95, 0x08},
{0x6c, 0x0a},
{0x6d, 0x55},
        
        
{0x4f, 0x80},
{0x50, 0x80},
{0x51, 0x00},
{0x52, 0x22},
{0x53, 0x5e},
{0x54, 0x80},
        
//{0x54, 0x40},//110
        
        
{0x6e, 0x11},//100
{0x6f, 0x9f},//0x9e for advance AWB
             {0x55, 0x00},//亮度
        {0x56, 0x40},//对比度
        {0x57, 0x80},//0x40, 
 };>

正点原子

说不定你电路连接有问题！

liuzheng081

回复【12楼】正点原子:
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是在OV7670寄存器的配置过程中报错的，并不是一开始配置寄存器就出错  如果是硬件的问题会这样吗？？

liuzheng081

回复【12楼】正点原子:
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原子老师  这样配置寄存器 用那么多吗  只配置几个关键的寄存器可以吗

正点原子

不可以

liuzheng081

回复【15楼】正点原子:
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原子老师   //设置VSYNC(PD2)帧同步输出中断
Ex_NVIC_Config(GPIO_D,2,FTIR);//设置PD2下降沿触发

MY_NVIC_Init(1,2,EXTI2_IRQChannel,2);//抢占1,响应2,组2线中断
return 0;
 }

 /************配置OV7670中断服务函数******************/
 void EXTI2_IRQHandler(void)
 {
  if((EXTI->R&0x04)&&(EXTI->IMR&0X04)!=0)//PR为挂起寄存器，IMR为中断屏蔽寄存器。
{
if(status==0)
{
FIFO_WE_SET;
FIFO_WRST_CLR;  //写复位
Delay_us(1);
FIFO_WRST_SET;
FIFO_WE_SET;
status=1;
}else if(status==1)
{
FIFO_WE_CLR;
status=2;
}
EXTI->R=1<<2;//清除中断2标志
}
 }

我这样配置中断  可是这样进不去中断，用示波器观察了PD2的波形有下降沿啊  不知为什么？？

正点原子

代码的问题，慢慢研究下吧

liuzheng081

回复【17楼】正点原子:
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好的  谢谢  原子老师

wytwcx

顶一下。