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