求助OV7670花屏问题

ID:267330 · 发表于 2019-3-12 09:47

extern u8 ov_sta; //在exit.c里面定义
//更新LCD显示
void camera_refresh(void)
{
u32 j;
  u16 color;
if(ov_sta)//有帧中断更新？
{

LCD_Set_Window(0,0,320,240);//将显示区域设置到屏幕中央
// LCD_WriteRAM_Prepare( );
  OV7670_RRST=0; //开始复位读指针
  OV7670_RCK_L;
  OV7670_RCK_H;
  OV7670_RCK_L;
  OV7670_RRST=1; //复位读指针结束
  OV7670_RCK_H;
  for(j=0;j<76800;j++) //此种方式需清楚TFT内部显示方向控制寄存器值速度较快
  {
OV7670_RCK_L;
color=GPIOF->IDR&0XFF; //读数据
OV7670_RCK_H;
color<<=8;
OV7670_RCK_L;
color|=GPIOF->IDR&0XFF; //读数据
OV7670_RCK_H;
LCD_WriteData_Color(color);
  }
ov_sta=0;    //清零帧中断标记
}
}

int main()
{
u8 i;
SysTick_Init(72);
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);  //中断优先级分组分2组
TFTLCD_Init(); //LCD初始化
EXTI0_Init();
LCD_ShowString(10,80,tftlcd_data.width,tftlcd_data.height,16,"1212!");

  i=OV7670_Init();
while(OV7670_Init())//初始化OV7670
{
  LCD_ShowString(10,80,tftlcd_data.width,tftlcd_data.height,16,"OV7670 Error!");
  delay_ms(200);
  LCD_Fill(10,80,239,206,WHITE);
  delay_ms(200);
}
  LCD_ShowString(10,80,tftlcd_data.width,tftlcd_data.height,16,"OV7670 OK!    ");
delay_ms(1500);

OV7670_Light_Mode(0);
OV7670_Color_Saturation(2);
OV7670_Brightness(2);
OV7670_Contrast(2);
  OV7670_Special_Effects(0);

OV7670_Window_Set(12,176,240,320); //设置窗口
  OV7670_CS=0;
LCD_Clear(BLACK);//正式程序要用

while(1)
{
camera_refresh();//更新显示
}
}

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