一.lcd简介：
LCD（Liquid Crystal Display的简称）液晶显示器。
LCD 的构造是在两片平行的玻璃基板当中放置液晶盒，下基板玻璃上设置TFT（薄膜晶体管），上基板玻璃上设置彩色滤光片，通过TFT上的信号与电压改变来控制液晶分子的转动方向，从而达到控制每个像素点偏振光出射与否而达到显示目的。现在LCD已经替代CRT成为主流，价格也已经下降了很多，并已充分的普及。
二.修改内核代码
[leiyuxing@centos6 linux-3.0]$ vim arch/arm/mach-s3c2440/mach-smdk2440.c 162 static struct s3c2410fb_display smdk2440_lcd_cfg __initdata = { 163 164 .lcdcon5 = S3C2410_LCDCON5_FRM565 | 165 S3C2410_LCDCON5_INVVLINE | 166 S3C2410_LCDCON5_INVVFRAME | 167 S3C2410_LCDCON5_PWREN | 168 S3C2410_LCDCON5_HWSWP, 169 170 .type = S3C2410_LCDCON1_TFT, 171 172 .width = 480,//modify by leiyuxing 173 .height = 272,//modify by leiyuxing 174 175 .pixclock = 4000, /* HCLK 60 MHz, divisor 10 */ //modify by leiyuxing 176 .xres = 480,//modify by leiyuxing 177 .yres = 272,//modify by leiyuxing 178 .bpp = 16,//modify by leiyuxing 179 .left_margin = 19,//modify by leiyuxing 180 .right_margin = 10,//modify by leiyuxing 181 .hsync_len = 30,//modify by leiyuxing 182 .upper_margin = 4,//modify by leiyuxing 183 .lower_margin = 2,//modify by leiyuxing 184 .vsync_len = 8,//modify by leiyuxing 185 }; ...... 204 .lpcsel = 0,//((0xCE6) & ~7) | 1<<4,//modify by leiyuxing三.配置内核文件
[leiyuxing@centos6 linux-3.0]$make menuconfig Device Drivers ---> Graphics (图像)support ---> <*> Support for frame buffer devices ---> [*] Enable firmware EDID [*] Enable Video Mode Handling Helpers <*> S3C2410 LCD framebuffer support [*] Backlight & LCD device support ---> <M> Lowlevel LCD controls <M> Lowlevel Backlight controls <M> Generic (aka Sharp Corgi) Backlight Driver Console display driver support ---> <*> Framebuffer Console support [*] Map the console to the primary display device [*] Framebuffer Console Rotation [*] Select compiled-in fonts [*] VGA 8x8 font [*] Mini 4x6 font [*] Bootup logo ---> [*] Standard 224-color Linux logo这样就配置完了，然后
[leiyuxing@centos6 linux-3.0]$ make如果要想在开发板的屏幕上看到你启动的代码，则因修改如下环境变量
set bootargs 'console=ttyS0 console=tty1,115200 mem=64M ubi.mtd=2 root=ubi0:rootfs rootwait rootfstype=ubifs rw' set bootargs_ubifs 'console=ttyS0 console=tty1,115200 mem=64M ubi.mtd=2 root=ubi0:rootfs rootwait rootfstype=ubifs rw'启动Linux内核，可以看到small penguin.
