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标题: ov7725摄像头初始化程序，请高手指导！！！ [打印本页]

作者: star001 时间: 2012-1-6 10:48
标题: ov7725摄像头初始化程序，请高手指导！！！
#include "SCCB.h"
//uchar SCCBBuffer[3]={0xC1,0x06,0x80}; //读设备0xC1 寄存器号0x06 (亮度)
//SCCBBuffer[0]=SubID+R(1)/W(0) SCCBBuffer[1]=RegID SCCBBuffer[2]=Value
#include "SCI.h"
byte change_reg[71][2]=
{


  {0x32,0x00},
  {0x2a,0x00},
  {0x11,0x40},
  {0x12,0x02},
  {0x12,0x02},
  {0x42,0x7f},
  {0x4d,0x00},
  {0x63,0xf0},
  {0x64,0xff},
  {0x65,0x20},

  {0x66,0x00},
  {0x67,0x00},
  {0x69,0x5d},
  {0x13,0xff},
  {0x0d,0x00},
  {0x0f,0xc5},
  {0x14,0x11},
  {0x22,0xFF},
  {0x23,0x01},
  {0x24,0x34},

  {0x25,0x3c},
  {0x26,0xa1},
  {0x2b,0x00},
  {0x6b,0xaa},
  {0x13,0xff},
  {0x90,0x0a},
  {0x91,0x01},
  {0x92,0x01},
  {0x93,0x01},
  {0x94,0x5f},

  {0x95,0x53},
  {0x96,0x11},
  {0x97,0x1a},
  {0x98,0x3d},
  {0x99,0x5a},
  {0x9a,0x1e},

  {0x9b,0x00},
  {0x9c,0x25},
  {0xa7,0x65},
  {0xa8,0x65},
  {0xa9,0x80},
  {0xaa,0x80},

  {0x9e,0x81},
  {0xa6,0x06},

  {0x7e,0x0c},
  {0x7f,0x16},
  {0x80,0x2a},
  {0x81,0x4e},
  {0x82,0x61},
  {0x83,0x6f},
  {0x84,0x7b},
  {0x85,0x86},
  {0x86,0x8e},
  {0x87,0x97},
  {0x88,0xa4},
  {0x89,0xaf},
  {0x8a,0xc5},
  {0x8b,0xd7},
  {0x8c,0xe8},
  {0x8d,0x20},

  {0x33,0x00},
  {0x22,0x99},
  {0x23,0x03},
  {0x4a,0x00},
  {0x49,0x13},
  {0x47,0x08},
  {0x4b,0x14},
  {0x4c,0x17},
  {0x46,0x05},
  {0x0e,0xf5},
  {0x0c,0xd0},

};

void  SCCB_Wait() //当前时钟下延时2us
{ uchar i;
  for(i=0;i<3;i++){
asm nop;
asm nop;
asm nop;
asm nop;
asm nop;
asm nop;
asm nop;
asm nop;
asm nop;
asm nop;
  }
}
void SCCB_Start(void)
{
  SDA_DR=OUT;
  SDA=1;
  SCL=1;
  SCCB_Wait();
  SCCB_Wait();
  SDA=0;
  SCCB_Wait();
  SCCB_Wait();
  SCL=0;
}
void  SCCB_Stop(void)
{ SDA_DR=OUT;
  SDA=0;
  SCCB_Wait();
  SCL=1;
  SCCB_Wait();
  SDA=1;
  SCCB_Wait();
}
void  SCCB_Send_ACK(void)
{
  SDA_DR=OUT;
  SDA=0;
  SCL=1;
  SCCB_Wait();
  SCL=0;
}
uchar  SCCB_Send_Byte(uchar ch)
{ uchar i;
  SDA_DR=OUT;
  for(i=0;i<8;i++){
if(ch & 0x80) SDA=1;
else SDA=0;
ch <<=1;
SCCB_Wait();
SCL=1;
SCCB_Wait();
SCCB_Wait();
SCL=0;
SCCB_Wait();
  }
  SDA=1;
  SDA_DR=IN;
  SCCB_Wait();
  SCL=1;
  SCCB_Wait();
  i=SDA;    //检测ACK信号是否为0（避免过多定义变量，所有就用i）
  SCL=0;
  SCCB_Wait();
  return i;
}
uchar SCCB_Recieve_Byte(void)
{ uchar i;
  uchar Recieve_Data=0;
  SDA_DR=IN;
  for(i=0;i<8;i++){
SCL=1;
SCCB_Wait();
Recieve_Data <<=1;
if(SDA) Recieve_Data|=0x01;
SCL=0;
SCCB_Wait();
  }
  return  Recieve_Data;
}
uchar SCCB_Read(uchar addr,uchar reg)
{
  uchar Read_Data;
  SCCB_Start();
  if(SCCB_Send_Byte(addr & 0xFE)){
SCCB_Stop();
return 0x81;
  }
  if(SCCB_Send_Byte(reg)){       //写阶段
SCCB_Stop();
return 0x82;
  }
  SCCB_Stop();
  SCCB_Start();
  if(SCCB_Send_Byte(addr | 0x01)){
SCCB_Stop();
return 0x83;
  }
  Read_Data=SCCB_Recieve_Byte();
  SCCB_Stop();
  return Read_Data;
}
uchar SCCB_Write(uchar addr,uchar reg,uchar value)
{ SCCB_Start();
if(SCCB_Send_Byte(addr & 0xFE)){
   SCCB_Stop();
      return 1;
}
if(SCCB_Send_Byte(reg)){
   SCCB_Stop();
      return 1;
}
if(SCCB_Send_Byte(value)){
   SCCB_Stop();
      return 1;
}
SCCB_Stop();
return 0;
}
void SCCB_Init(void)
{
  byte k,y;
  SCL_DR=OUT;
  SDA_DR=OUT;
PERT_PERT4=1;
PPST_PPST4=0;
SCCB_Write(0x42,0x12,0x80) ;

for(k=0;k<71;k++) {

  //SCCB_Write(0x42,0x0C,0x20) ;
// SCCB_Write(0x42,0x64,0xFF) ;
// SCCB_Write(0x42,0x65,0x20) ;
  SCCB_Write(0x42,change_reg[k][0],change_reg[k][1]) ;
// PIEH_PIEH2 = 0;
// PIEH_PIEH3 = 0;
}

while(0){
SCI_Write(0xAA);
SCI_Write(0xAA) ;
SCI_Write(0xAA);
SCI_Write(0xAA) ;


  for(k=0;k<71;k++){
SCI_Write(0xAA) ;
SCI_Write(change_reg[k][0]);
SCI_Write(SCCB_Read(0x43,change_reg[k][0]));
  }
}

}

作者: star001 时间: 2012-1-6 10:49
采用mc9s12xs128

作者: lsa123 时间: 2012-1-26 00:53
我也是用7725，楼主你是自己写的还是送的例程，我也还没有调出图像，要不交流下代码

作者: wangzhe330 时间: 2012-2-16 22:14
你的7725带FIFO吗

作者: dongfangzi 时间: 2012-2-27 23:03

作者: xuezihan 时间: 2012-3-9 20:32
准备使用OV7725

作者: ROB星空 时间: 2014-10-13 22:22
同样OV7725的围观

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