OK6410 LCD配置

1：配置与LCD相连的GPIO

    GPICON = 0xaaaaaaaa;  /* GPI0~GPI15用作lcd_vd[0~15] */

    GPJCON = 0xaaaaaaa;   /* GPJ0~GPJ7用作lcd_vd[16~23] 

                            GPJ8   HSYNC

                            GPJ9   VSYNC

                            GPJ10  VDEN

                            GPJ11  VCLK

*/

    GPFCON &= ~(0x3<<28);

    GPFCON |= (1<<28);   /* GPF14用作背光使能信号 */

    GPECON &= ~(0xf);

    GPECON |= (0x1);      /* GPE0用作LCD的on/off信号 */

2:配置相关寄存器

     2. 初始化6410的display controller 

     2.1 hsync,vsync,vclk,vden的极性和时间参数

     2.2 行数、列数(分辨率),象素颜色的格式

     2.3 分配显存(frame buffer),写入display controller

 

    //下面两个由6410手册要求设置 

    MIFPCON &= ~(1<<3);   /* Normal mode */

    SPCON   &= ~(0x3);

    SPCON   |= 0x1;       /* RGB I/F style */

//配置输出格式和时钟

#if0

    VIDCON0 &= ~((3<<26) |(3<<17) | (0xff<<6));    // RGBI/F, RGB Parallel format,  

    VIDCON0 |= ((2<<6) | (1<<4) |(0x3<<2));     

// vclk== 27MHz Ext Clock input /(CLKVAL+1) = 27/3 = 9MHz */

#else

    VIDCON0 &= ~((3<<26) |(3<<17) | (0xff<<6)  |(3<<2));     

//RGB I/F, RGB Parallelformat,  

    VIDCON0 |= ((14<<6) | (1<<4));   // vclk== HCLK / (CLKVAL+1) = 133/15= 9MHz 

#endif

    //视频输出及显示控制信号使能

    VIDCON0 &= ~(0x3);

    //配置时钟HSYNC VSYNC的极性

    VIDCON1 &= ~((1<<7) |(1<<4));   /* 在vclk的下降沿获取数据 */

    VIDCON1 |= ((1<<6) | (1<<5));  /* HSYNC高电平有效, VSYNC高电平有效 */

//配置时序规则

RGB 接口时序图:

参照4.3寸的LCD “Product Specifications”

定时（时序）规则：

由上面可以得出

VSPW   =9

    VBPD   =1

    LINEVAL=271

    VFPD   =1

 

    HSPW   =40    

    HBPD   = 1

    HOZVAL =479

    HFPD  = 1

VIDTCON0= (VBPD << 16) | (VFPD << 8) | (VSPW << 0);

    VIDTCON1 = (HBPD << 16) | (HFPD<< 8) | (HSPW << 0);

    VIDTCON2 = (LINEVAL << 11) | (HOZVAL<< 0);

//配置窗口0

WINCON0 &= ~(0xf << 2);

WINCON0|= (0xb<<2) | (1<<0);    

/* unpacked 24 BPP (non-palletizedR:8-G:8-B:8 ) */

//配置窗口0的位置

LeftTopX   =0

LeftTopY   =0

 

RightBotX  =479

RightBotY  =271

    VIDOSD0A = (LeftTopX<<11) |(LeftTopY << 0);

    VIDOSD0B = ((RightBotX+1)<<11) |((RightBotY+1) << 0);

    //窗口尺寸

    VIDOSD0C = (LINEVAL + 1) * (HOZVAL + 1);

//设置显存在内存（帧缓冲地址）的首地址 与 尾地址  

    VIDW00ADD0B0= FRAME_BUFFER;   

    VIDW00ADD1B0 =  (((HOZVAL + 1)*4 + 0) * (LINEVAL + 1)) &(0xffffff);

                        /* VBASEL = VBASEU + (LINEWIDTH+OFFSIZE) x(LINEVAL+1) 

                         *        = 0 + (480*4 + 0) * 272

                         *        注意只取了前24位

                         */

    VIDW00ADD2 =  HOZVAL + 1;//可以不用