STM32F1+OV2640总是丢失数据

和谐年份 · 发表于 2016-4-10 21:09:33

最近在用STM32F1采集OV2640的数据，当用JPEG输出的时候，320*280每幅图片只能采集到几百个数据，最多的时候能采集到5k数据。不知道什么原因，望大神们指教。代码如下。
ov2640_speed_ctrl();

OV2640_JPEG_Mode();
OV2640_OutSize_Set(OV2640_JPEG_WIDTH,OV2640_JPEG_HEIGHT);
SCCB_WR_Reg(0XFF,0X00);
SCCB_WR_Reg(0XD3,30);
SCCB_WR_Reg(0XFF,0X01);
SCCB_WR_Reg(0X11,0X1);
for(i=0;i<10;i++) //丢掉前十帧图像
{
while(OV2640_VSYNC==1);
while(OV2640_VSYNC==0);
}

while(1)
{

            while(OV2640_VSYNC)
{

               while(OV2640_PCLK)
{
i++;
while(OV2640_PCLK);
}
}
               while(!OV2640_VSYNC)
{
printf("PCLK num %d\r\n",i);
i=0;
while(!OV2640_VSYNC);
}

}

引脚配置如下：
RCC->APB2ENR|=1<<2;
RCC->APB2ENR|=1<<3;

GPIOB->CRH&=0XFFFF000F;
GPIOB->CRH|=0X00008830; //PB9-RST  PB10-PCLK,PB11-HERF
GPIOB->ODR|=1<<9;
GPIOB->ODR|=1<<10;
GPIOB->ODR|=1<<11;

GPIOB->CRL&=0X0FFFFFFF;
GPIOB->CRH|=0X30000000; //PB7  PWDN
GPIOB->ODR|=1<<7;

GPIOA->CRL=0X88888888; //PA0~7 数据端
GPIOA->ODR|=0x00ff;

GPIOB->CRL&=0XFFFFFFF0;
GPIOB->CRL|=0X00000008; //PB0  VSYNC
GPIOB->ODR|=1;

//OV2640 引脚
#define OV2640_VSYNC PBin(0)       //VSYNC
#define OV2640_PWDN    PBout(7)       //POWER DOWN
#define OV2640_RST             PBout(9)             //复位控制引脚
#define OV2640_HREF    PBin(11)             //HREF
#define OV2640_PCLK    PBin(10)       //PCLK
#define OV2640_DATA GPIOA->IDR&0x00FF    //数据端

请各位大神不吝赐教。

和谐年份 · 发表于 2016-4-10 21:09:34

问题找到。OV1640寄存器操作不对。
现在找了份输出QCIF的.寄存器配置如下。
const unsigned char OV2640_JPEG_INIT[][2]=
{
  0xff, 0x00,
  0x2c, 0xff,
  0x2e, 0xdf,
  0xff, 0x01,
  0x3c, 0x32,
  0x11, 0x30,
  0x09, 0x02,
  0x04, 0x28,
  0x13, 0xe5,
  0x14, 0x48,
  0x2c, 0x0c,
  0x33, 0x78,
  0x3a, 0x33,
  0x3b, 0xfB,
  0x3e, 0x00,
  0x43, 0x11,
  0x16, 0x10,
  0x39, 0x92,
  0x35, 0xda,
  0x22, 0x1a,
  0x37, 0xc3,
  0x23, 0x00,
  0x34, 0xc0,
  0x36, 0x1a,
  0x06, 0x88,
  0x07, 0xc0,
  0x0d, 0x87,
  0x0e, 0x41,
  0x4c, 0x00,
  0x48, 0x00,
  0x5B, 0x00,
  0x42, 0x03,
  0x4a, 0x81,
  0x21, 0x99,
  0x24, 0x40,
  0x25, 0x38,
  0x26, 0x82,
  0x5c, 0x00,
  0x63, 0x00,
  0x61, 0x70,
  0x62, 0x80,
  0x7c, 0x05,
  0x20, 0x80,
  0x28, 0x30,
  0x6c, 0x00,
  0x6d, 0x80,
  0x6e, 0x00,
  0x70, 0x02,
  0x71, 0x94,
  0x73, 0xc1,
  0x12, 0x40,//0x40
  0x17, 0x11,
  0x18, 0x43,
  0x19, 0x00,
  0x1a, 0x4b,
  0x32, 0x09,
  0x37, 0xc0,
  0x4f, 0x60,
  0x50, 0xa8,
  0x6d, 0x00,
  0x3d, 0x38,
  0x46, 0x3f,
  0x4f, 0x60,
  0x0c, 0x3c,
  0xff, 0x00,
  0xe5, 0x7f,
  0xf9, 0xc0,
  0x41, 0x24,
  0xe0, 0x14,
  0x76, 0xff,
  0x33, 0xa0,
  0x42, 0x20,
  0x43, 0x18,
  0x4c, 0x00,
  0x87, 0xd5,
  0x88, 0x3f,
  0xd7, 0x03,
  0xd9, 0x10,
  0xd3, 0x82,
  0xc8, 0x08,
  0xc9, 0x80,
  0x7c, 0x00,
  0x7d, 0x00,
  0x7c, 0x03,
  0x7d, 0x48,
  0x7d, 0x48,
  0x7c, 0x08,
  0x7d, 0x20,
  0x7d, 0x10,
  0x7d, 0x0e,
  0x90, 0x00,
  0x91, 0x0e,
  0x91, 0x1a,
  0x91, 0x31,
  0x91, 0x5a,
  0x91, 0x69,
  0x91, 0x75,
  0x91, 0x7e,
  0x91, 0x88,
  0x91, 0x8f,
  0x91, 0x96,
  0x91, 0xa3,
  0x91, 0xaf,
  0x91, 0xc4,
  0x91, 0xd7,
  0x91, 0xe8,
  0x91, 0x20,
  0x92, 0x00,
  0x93, 0x06,
  0x93, 0xe3,
  0x93, 0x05,
  0x93, 0x05,
  0x93, 0x00,
  0x93, 0x04,
  0x93, 0x00,
  0x93, 0x00,
  0x93, 0x00,
  0x93, 0x00,
  0x93, 0x00,
  0x93, 0x00,
  0x93, 0x00,
  0x96, 0x00,
  0x97, 0x08,
  0x97, 0x19,
  0x97, 0x02,
  0x97, 0x0c,
  0x97, 0x24,
  0x97, 0x30,
  0x97, 0x28,
  0x97, 0x26,
  0x97, 0x02,
  0x97, 0x98,
  0x97, 0x80,
  0x97, 0x00,
  0x97, 0x00,
  0xc3, 0xed,
  0xa4, 0x00,
  0xa8, 0x00,
  0xc5, 0x11,
  0xc6, 0x51,
  0xbf, 0x80,
  0xc7, 0x10,
  0xb6, 0x66,
  0xb8, 0xA5,
  0xb7, 0x64,
  0xb9, 0x7C,
  0xb3, 0xaf,
  0xb4, 0x97,
  0xb5, 0xFF,
  0xb0, 0xC5,
  0xb1, 0x94,
  0xb2, 0x0f,
  0xc4, 0x5c,
  0xc0, 0x64,
  0xc1, 0x4B,
  0x8c, 0x00,
  0x86, 0x3D,
  0x50, 0x00,
  0x51, 0xC8,
  0x52, 0x96,
  0x53, 0x00,
  0x54, 0x00,
  0x55, 0x00,
  0x5a, 0xC8,
  0x5b, 0x96,
  0x5c, 0x00,
  0xd3, 0x7f,
  0xc3, 0xed,
  0x7f, 0x00,
  0xda, 0x00,
  0xe5, 0x1f,
  0xe1, 0x67,
  0xe0, 0x00,
  0xdd, 0x7f,
  0x05, 0x00,

  0x12, 0x40,//0x40
  0xd3, 0x7f,
  0xc0, 0x16,
  0xC1, 0x12,
  0x8c, 0x00,
  0x86, 0x3d,
  0x50, 0x00,
  0x51, 0x2C,
  0x52, 0x24,
  0x53, 0x00,
  0x54, 0x00,
  0x55, 0x00,
  0x5A, 0x2c,
  0x5b, 0x24,
  0x5c, 0x00,
};

和谐年份 · 发表于 2016-4-11 08:42:43

自己顶一个

和谐年份 · 发表于 2016-4-12 20:53:43

现在有如下的问题，希望吧里的大神帮下忙。
看原子的教程里面写着：传感器窗口设置，图像尺寸设置，图像窗口设置，图像输出大小等。不知道这具体的是什么？
在原子的code里面有函数
OV2640_OutSize_Set(OV2640_JPEG_WIDTH,OV2640_JPEG_HEIGHT);
OV2640_OutSize_Set(lcddev.width,lcddev.height);
是不是这样就能直接改变输出大小了呢？比如说uxga改为cif？？