將Android移植到FS2410開發(fā)板上

1．Android已經(jīng)可以通過NFS在FS2410開發(fā)板上運行

二、目前缺陷

1．觸摸屏沒有校準

2．Android中時鐘停止，結(jié)束zygote進程，系統(tǒng)重啟，時鐘更新，但再次停止不動

3．串口無法與GPRS模塊通訊

三、移植步驟

一、移植Android內(nèi)核到FS2410開發(fā)板上

1、從de.google.com/p/android/downloads/list">http://code.google.com/p/android/downloads/list上下載linux-2.6.25-android-1.0_r1.tar.gz

2、將內(nèi)核解壓到用戶目錄，如/home/wangan/kernel.git

3、進入kernel.git文件夾，如cd ~/kernel.git/

4、修改arch/arm/plat-s3c24xx/common-smdk.c文件中的nand flash分區(qū)設(shè)置，如gedit arch/arm/plat-s3c24xx/common-smdk.c

修改static struct mtd_partition smdk_default_nand_part[]結(jié)構(gòu)體為：

static struct mtd_partition smdk_default_nand_part[] = {

[0] = {

.name = "Boot Agent",

.size = SZ_256K,

.offset = 0,

},

[1] = {

.name = "Linux Kernel",

.offset = SZ_256K,

.size = SZ_2M - SZ_256K,

},

[2] = {

.name = "File System",

.offset = SZ_2M,

.size = SZ_32M - SZ_2M,

},

[3] = {

.name = "Other",

.offset = SZ_32M,

.size = SZ_32M,

}

};

5、在http://www.codesourcery.com/gnu_toolchains/arm/portal/release644網(wǎng)站上下載IA32 GNU/Linux TAR。

6、將文件解壓到用戶目錄，如/home/wangan/arm-2008q3

7、進入arm-2008q3/bin文件夾，如cd ~/arm-2008q3/bin/

8、添加當前路徑進入環(huán)境變量，如export PATH=$PWD:$PATH，或修改~/.bashrc文件并重新登錄

9、進入內(nèi)核文件夾，如cd ~/kernel.git/

10、修改Makefile文件，如gedit Makefile

更改ARCH和CROSS_COMPILE

#ARCH ?= $(SUBARCH)

ARCH ?= arm

#CROSS_COMPILE ?= arm-eabi-

CROSS_COMPILE ?= arm-none-eabi-

11、從華清遠見Linux-2.6.8.1內(nèi)核壓縮包中提取.config文件（注意：config前面有個“.”）放入kernel.git文件夾

12、運行make menuconfig

(1) 確保System Type ---> ARM system type ()中的內(nèi)容為Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443

(2) 確保System Type ---> S3C2410 Machines ---> [*] SMDK2410/A9M2410被勾選

(3) 取消選擇與Goldfish相關(guān)的內(nèi)容

Device Drivers ---> Character devices ---> < > Goldfish TTY Driver

Device Drivers ---> Power supply class support ---> < > Goldfish battery driver (NEW)

Device Drivers ---> Real Time Clock ---> < > GOLDFISH (NEW)

Device Drivers ---> Graphics support ---> Support for frame buffer devices ---> < > Goldfish Framebuffer

(4) 選擇S3C2410 LCD相關(guān)的內(nèi)容

Device Drivers ---> Graphics support ---> Support for frame buffer devices ---> <*> S3C2410 LCD framebuffer support

Device Drivers ---> Graphics support ---> [*] Bootup logo ---> [*] Standard black and white Linux logo

Device Drivers ---> Graphics support ---> [*] Bootup logo ---> [*] Standard 16-color Linux logo

Device Drivers ---> Graphics support ---> [*] Bootup logo ---> [*] Standard 224-color Linux logo

(5) 選中Android內(nèi)核必須選項

Kernel Features ---> [*] Use the ARM EABI to compile the kernel

General setup ---> [*] Use full shmem filesystem

General setup ---> [*] Enable Androids Shared Memory Subsystem

System Type ---> [*] Support Thumb user binaries

Device Drivers ---> Android ---> [*] Android log driver

Device Drivers ---> Android ---> <*> Binder IPC Driver

(6) 盡量選中Android內(nèi)核可選選項

Device Drivers ---> Android ---> [*] RAM buffer console

Device Drivers ---> Android ---> [*] Android timed gpio driver

Device Drivers ---> Android ---> [*] Only allow certain groups to create sockets

(7) 其余CONFIG選項，如系統(tǒng)支持請一并選擇

CONFIG_ANDROID_POWER =y

CONFIG_ANDROID_POWER_STAT =y

CONFIG_ANDROID_POWER_ALARM =y

（可以在Kconfig文件中查找ANDROID_POWER等字段進行選擇，或者直接修改.config文件）

13、退出并保存.config

二、移植LCD驅(qū)動到Linux-2.6.25內(nèi)核

1、 進入kernel.git文件夾，如cd ~/kernel.git/

2、 修改arch/arm/mach-s3c2410/mach-smdk2410.c文件，如gedit arch/arm/mach-s3c2410/mach-smdk2410.c

(1) 增加頭文件#include

(2) 增加兩給結(jié)構(gòu)體

static struct s3c2410fb_display smdk2410_lcd_cfg __initdata = {

.lcdcon5 = S3C2410_LCDCON5_FRM565 |

S3C2410_LCDCON5_INVVLINE |

S3C2410_LCDCON5_INVVFRAME |

S3C2410_LCDCON5_PWREN |

S3C2410_LCDCON5_HWSWP,

.type = S3C2410_LCDCON1_TFT,

.width = 320,

.height = 240,

.pixclock = 174757,

.xres = 320,

.yres = 240,

.bpp = 16,

.left_margin = 16,

.right_margin = 59,

.hsync_len = 9,

.upper_margin = 2,

.lower_margin = 6,

.vsync_len = 16,

};

static struct s3c2410fb_mach_info smdk2410_fb_info __initdata = {

.displays = &smdk2410_lcd_cfg,

.num_displays = 1,

.default_display = 0,

.gpccon = 0xaa955699,

.gpccon_mask = 0xffc003cc,

.gpcup = 0x0000ffff,

.gpcup_mask = 0xffffffff,

.gpdcon = 0xaa95aaa1,

.gpdcon_mask = 0xffc0fff0,

.gpdup = 0x0000faff,

.gpdup_mask = 0xffffffff,

.lpcsel = 0xf82,

};

(3) 在smdk2410_init（）函數(shù)中增加s3c24xx_fb_set_platdata(&smdk2410_fb_info);

三、移植觸摸屏驅(qū)動到Linux-2.6.25內(nèi)核（參見《基于linux-2.26.5內(nèi)核的FS2410開發(fā)板觸摸屏驅(qū)動移植》）并制作zImage文件，如make

這里提一下，確保已經(jīng)勾選Device Drivers ---> Input device support ---> <*> Event interface，本人曾經(jīng)在這里徘徊，感謝游老師悉心教誨！

四、制作支持ARMv4的Android根文件系統(tǒng)

1、從http://www.rayfile.com/files/d4660882-de04-11dd-af0d-0014221b798a/下載Android的ARMv4版本根文件

2、在/dev下增加null和console兩個設(shè)備節(jié)點

mknod -m 660 null c 1 3

mknod -m 660 console c 5 1

3、在U-boot中修改啟動參數(shù)init為/init，完整的命令行如：root=nfs nfsroot=169.254.7.118:/source/rootfs ip=169.254.7.119 console=ttySAC0,115200 init=/init

4、修改/init.rc文件，去除除mount tmpfs tmpfs /sqlite_stmt_journals size=4m之外的所有mount命令

系統(tǒng)制作完成，現(xiàn)在應該可以看到漂亮的大表了。首次啟動需要創(chuàng)建文件，大約17分鐘。然后每次啟動只需要2分鐘。