stm32f407从外部flash获取二进制图片数据，显示在tft液晶屏上，出来的图像很多横线黑线，什么原因？

一抹时光 · 发表于 2018-8-27 18:05:49

u16 image_getcolor(u8 mode,u8 *str)
{
u16 color;
if(mode)
{
color=((u16)*str++)<<8;
color|=*str;
}else
{
color=*str++;
color|=((u16)*str)<<8;
}
return color;
}

void image_show(u16 xsta,u16 ysta,u16 width,u16 height,u8 scan,u8 *p)
{
u8* a;
u32 i;
u32 len=0;
u32 number = 0;
u32 u;
u8  Buffer[4096];
u32 picaddr=PCADDR1;

LCD_WriteRAM_Prepare();
if((scan&0x03)==0)
{
LCD_Scan_Dir(L2R_U2D);
LCD_Set_Window(0,0,800,480);
LCD_SetCursor(0,0);

}else
{
LCD_Scan_Dir(U2D_L2R);
LCD_Set_Window(0,0,800,480);
LCD_SetCursor(0,0);
}
LCD_WriteRAM_Prepare();    //¿aê¼D′èëGRAM

len=800*480*2;

if(len%4096 == 0)
{
      number = len/4096;
      for(u=0;u<number;u++)
      {
         W25QXX_Read(Buffer,0x19BE38+(u*4096),4096);
a=Buffer;
         for(i=0;i<100;i++)
         {
            if(i%2 == 0)
            {

LCD_WR_DATA(image_getcolor(scan&(1<<4),a));
a+=2;


            }


}

}

}
  else
{
   number = len/4096 +1;
   for(u=0;u<number-1;u++)
   {

   W25QXX_Read(Buffer,0x19BE38+(u*254), 254);
   a=Buffer;
   for(i=0;i<254;i++)
   {
         if(i%2 == 0)
         {

   LCD_WR_DATA(image_getcolor(scan&(1<<4),a));
   a+=2;

         }
   }

}
W25QXX_Read(Buffer, 0x19BE30+(254*(number-1)), len-(254*(number-1)));
a=Buffer;
for(i=0;i<len-(254*(number-1));i++)
{
if(i%2 == 0)
{

LCD_WR_DATA(image_getcolor(scan&(1<<4),a));
a+=2;

}
}
}

LCD_Set_Window(0,0,800,480);
}

void image_display(u16 x,u16 y,u8 * imgx)
{
HEADCOLOR *imginfo;
u8 ifosize=sizeof(HEADCOLOR);
imginfo=(HEADCOLOR*)imgx;
image_show(x,y,800,480,imginfo->scan,imgx+ifosize);
}

void LCD_ShowPic(u16 xstart, u16 ystart, u16 xend, u16 yend,u32 pic_add)
{
u8  Head[8];
u8 *a;
W25QXX_Read(Head,0x19BE30,8);
a=Head;
  image_display(0,0,a);

}