再次请教TFTLCD的问题

实验板：TQ2440
环境：ubuntu12.04 + arm-linux-gcc-3.4.5-glibc-2.3.6
我的板子上配的LCD，根据数据手册上是24bpp，从原理图上看，VD[23:0]对应的都接至了2440的VD引脚上。
写了一段代码，想要用单一颜色填充全屏，结果发现，只能显示出绿色，刚复位那一下，绿色较亮，接着就变得很暗，而且屏幕还抖动。代码贴在下面了，请各位帮忙看看是咋回事吧。

1. //初始化部分
   
2. #define TFT_X_SIZE (480)
   
3. #define TFT_Y_SIZE (272)
   
4. 
   
5. extern volatile unsigned int TFTBuffer[TFT_X_SIZE][TFT_Y_SIZE];
   
6. 
   
7. #define CLKVAL (5)
   
8. #define MMODE  (0)
   
9. #define PNRMODE (3)
   
10. #define BPPMODE (13)
    
11. #define ENVID (0)
    
12. #define VBPD  (1)
    
13. #define LINEVAL ( TFT_Y_SIZE - 1 )
    
14. #define VFPD (1)
    
15. #define VSPW (9)
    
16. #define HBPD (1)
    
17. #define HOZVAL ( TFT_X_SIZE - 1 )
    
18. #define HFPD (1)
    
19. #define MVAL (13)    //？
    
20. #define HSPW (40)
    
21. #define BPP24BL  (0)
    
22. #define FRM565  (1)
    
23. #define INVVCLK  (0)
    
24. #define INVVLINE (1)
    
25. #define INVVFRAME (1)
    
26. #define INVVD  (0)
    
27. #define INVPWREN (0)
    
28. #define INVLEND  (0)
    
29. #define PWREN  (1)
    
30. #define ENLEND  (0)
    
31. #define BSWP  (0)
    
32. #define HWSWP  (0)
    
33. #define LCDBANK  ( (unsigned long)TFTBuffer>>22 )
    
34. #define LCDBASEU ( ((unsigned long)TFTBuffer>>1)&0x1FFFFF )
    
35. #define LCDBASEL ( (((unsigned long)TFTBuffer + (TFT_X_SIZE*TFT_Y_SIZE*4))>>1)&0x1FFFFF )
    
36. 
    
37. #define OFFSIZE  (0)
    
38. #define PAGEWIDTH (TFT_X_SIZE*2)
    
39. 
    
40. #define LCDCON1_VAL ( CLKVAL<<8 | MMODE<<7 | PNRMODE<<5 | BPPMODE<<1 | ENVID )
    
41. #define LCDCON2_VAL ( VBPD<<24 | LINEVAL<<14 | VFPD<<6 | VSPW )
    
42. #define LCDCON3_VAL ( HBPD<<19 | HOZVAL<<8 | HFPD )
    
43. #define LCDCON4_VAL ( MVAL<<8 | HSPW )
    
44. #define LCDCON5_VAL ( BPP24BL<<12 | FRM565<<11 | INVVCLK<<10 | \
    
45.        INVVLINE<<9 | INVVFRAME<<8 | INVVD<<7 | INVVD<<6 | \
    
46.        INVPWREN<<5 | INVLEND<<4 | PWREN<<3 | ENLEND<<2 | \
    
47.        BSWP<<1 | HWSWP )
    
48. #define LCDSADDR1_VAL ( LCDBANK<<21 | LCDBASEU )
    
49. #define LCDSADDR2_VAL ( LCDBASEL )
    
50. #define LCDSADDR3_VAL ( OFFSIZE<<11 | PAGEWIDTH )
    
51. 
    
52. #define GPDCON_Val  0xAAAAAAAA        //IO口是在一个IO初始化函数中统一初始化的。
    
53. #define GPDDAT_Val  0xFFFF            //试过使能上拉，现象一样
    
54. #define GPCCON_Val  0xAAAAAAAA
    
55. #define GPCDAT_Val   0xFF00
    
56. 
    
57. void InitTFT( void )
    
58. {
    
59.     LCDCON1 = LCDCON1_VAL;
    
60.     LCDCON2 = LCDCON2_VAL;
    
61.     LCDCON3 = LCDCON3_VAL;
    
62.     LCDCON4 = LCDCON4_VAL;
    
63.     LCDCON5 = LCDCON5_VAL;
    
64. 
    
65.     LCDSADDR1 = LCDSADDR1_VAL;
    
66.     LCDSADDR2 = LCDSADDR2_VAL;
    
67.     LCDSADDR3 = LCDSADDR3_VAL;
    
68. 
    
69.     LCDINTMSK |= 0x3;   //屏蔽LCD中断
    
70.     LPCSEL = 0;         //禁止LPC3600/LCC3600模式
    
71.     TPAL = 0;           //禁止临时调色板
    
72. }

复制代码

1. //功能函数
   
2. 
   
3. volatile unsigned int TFTBuffer[TFT_X_SIZE][TFT_Y_SIZE];
   
4. 
   
5. //开启或关闭TFTLCD控制器
   
6. void TFT_EnOrDis( unsigned int iState )
   
7. {
   
8.     if( iState == 0 )
   
9.         LCDCON1 &= ~1;
   
10.     else
    
11.         LCDCON1 |= 1;
    
12. }
    
13. 
    
14. //在指定坐标特定颜色的点描点
    
15. int TFT_DrawPoint( unsigned int x, unsigned int y, unsigned int iColour )
    
16. {
    
17.     if( x>HOZVAL || y>LINEVAL ) return FAIL;    TFTBuffer[x][y] = iColour;
    
18.     return SUCCESS;
    
19. }

复制代码

1. //在main()中调用功能函数填充全屏
   
2. 
   
3. TFT_EnOrDis(1);
   
4. iColour = TFT_RED;
   
5. 
   
6. for( x = 0 ; x < 480 ; x++ )
   
7.     for( y = 0 ; y < 272 ; y++ )
   
8.         TFT_DrawPoint( x, y, iColour );

复制代码

贴上整个测试工程，求各位高人笼罩啊。