ARM2440 for LCD-EEWORLD

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Change the original 3.5-inch resolution from 240x320 to 480x272

Timing settings:

CLKVAL=4 (VCLK =10) 5< VCLK <12 Each dot scanning cycle　　　　　　　　

VSPW = 10-1 2< tvp < - typ:10 Vertical synchronization signal

VBPD=2-1 2< tvb <- typ: 2 How long does it work after the vertical sync signal

LINEVAL=272-1 tvd ：272 272 lines

VFPD=2-1 2< tvf < - type:2 How long does it take to send a synchronization signal after scanning a frame?

HSPW=41-1 2< thp < - type:41 Horizontal synchronization signal

HBPD=2-1 2< thb <- How long does it work after the horizontal synchronization signal

HOZVAL=480-1 thd：480 480列

HFPD=2-1 2< thb < - How long does it take to receive the synchronization signal after scanning this line?

HSYNC_INV VSYNC_INV horizontal and vertical signals are opposite to the LCD controller level, so bit flipping is required

Video memory address rewrite

        LCDSADDR2 = LOWER21BITS((LCDFRAMEBUFFER+
                    (LINEVAL_TFT_240320+1)*(HOZVAL_TFT_240320+1)*2)>>1);
        LCDSADDR3 = (0<<11) | (LCD_XSIZE_TFT_240320*2/2);

xsize = 240;
ysize = 320;

--------------------------------------------------------------------------------------------

        LCDSADDR2 = LOWER21BITS((LCDFRAMEBUFFER+
                    (480)*(272)*1)>>1);
        LCDSADDR3 = (0<<11) | (480/2);

　 xsize = 480;
ysize = 272;

Keywords：ARM2440 Reference address：ARM2440 for LCD

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