How to use pre-built images of android on i.MX5X?

[KrishnaPavan]

Hi,

I have downloaded Android Source Code & Demo Images.

I would like to go with the usage of prebuilt images!

• I have u-boot.bin and uImage [pre-built images]

• Android file system:

• Initramfs:  imx51_BBG/SD/uramdisk.img
• System root:  imx51_BBG/SD/system.img
• Data: imx51_BBG/SD/recovery.img

I know how to load the u-boot.bin & uImage at a particular partition. the same we did with LTIB, I guess!

How to load the rootfs, & How to make use of the above listed images like initramfs?

Please Suggest!

[KrishnaPavan]

The process I have posted is completely wrong.

Many use a script-file to port the images to SD Card.

However, I searched for a correct procedure, and have tried it.

An outline is here.

Partition Type/Index	Name	Start Offset	Size	File System	Content
N/A	BOOT	0	10 MB	N/A	bootloader/kernel/uramdisk images
Primary 1	MEDIA	11 MB	User Defined	VFAT. Mount as /sdcards	Media file storage
Primary 2	SYSTEM	follow MEDIA	>= 200 MB	EXT4. Mount as /system (with read only)	Android system bin/libs (system.img)
Logic 5 (Extended 3)	DATA	follow SYSTEM	> 200 MB	EXT4. Mount as /data	Android data (e.g. installed app)
Logic 6 (Extended 3)	CACHE	follow DATA	> 10 MB	EXT4. Mount as /cache	Android cache
Primary 4	RECOVERY	follow CACHE	> 20 MB	EXT4. Mount as / in recovery mode	Root file system for recovery mode (recovery.img)

[arunmitteam]

Hi,

Were you able to boot the android image flash in the sd card? I'm trying to boot the imx53 with adeneo prebuilt image but I think I'm missing something. As you have mentioned above I just used the prebuilt script that comes with the download.

I formatted the sd card and just executed the ./flash_prebuilt_android.sh /dev/sda. The script runs successfully but I'm unable to boot the board. Are my steps correct? if so how do I check the boot log when I power up the imx53 board?

Please suggest. Thanks in advance.

[JayZhang]

u-boot-no-padding.bin means you have skip 1k space in sdcard, so these two ways are the same, I think you can try to change a sdcard two dd your image.

Krishna Pavan said:

Hi,

Should I use

sudo dd if=u-boot.bin of=u-boot-no-padding.bin bs=1K skip=1; sync   <---

[KrishnaPavan]

Hi,

Should I use

sudo dd if=u-boot.bin of=u-boot-no-padding.bin bs=1K skip=1; sync   <---

[KrishnaPavan]

Hi, Here's what I have tried, but could not get result in my project.

                                                                Download the u-boot image:
sudo dd if=u-boot.bin of=/dev/sdb bs=1K skip=1 seek=1; sync
                                                                Or If you are using no padding u-boot image:
sudo dd if=u-boot-no-padding.bin of=/dev/sdb bs=1K seek=1; sync
                                                                Download the kernel image:
sudo dd if=uImage of=/dev/sdb bs=1M seek=1; sync
                                                                Download the initramfs image:
sudo dd if=uramdisk.img of=/dev/sdb bs=1M seek=6; sync
                                                                

sudo fdisk /dev/sdb
            u           [switch the unit to sectors instead of cylinders]
            d           [repeat this until no partition is reported by the ‘p’ command ]
            n           [create a new partition]
            p           [create a primary partition]
            1           [the first partition]
            8192      [for kernel and other]
          Until the required
            w           [ this writes the partition table to the medium and fdisk exits]

Partitions

sudo mkfs.vfat /dev/sdb1
sudo mkfs.ext4 /dev/sdb2 -O ^extent -L system
sudo mkfs.ext4 /dev/sdb4 -O ^extent -L recovery
mkfs.ext4 /dev/sdb5 -O ^extent -L data
mkfs.ext4 /dev/sdb6 -O ^extent -L cache

                                                                Download the Android system root image:
sudo dd if=system.img of=/dev/sdb2; sync
                                                                Download the Android recovery image:
sudo dd if=recovery.img of=/dev/sdb4; sync


Environment Variables

U-Boot > setenv loadaddr 0x90800000        [0x90800000 for i.MX51, 0x70800000 for i.MX50/3]
U-Boot > setenv rd_loadaddr 0x90C00000    [0x90C00000 for i.MX51, 0x70C00000 for i.MX50/3]
U-Boot > setenv bootcmd 'run bootcmd_SD; bootm ${loadaddr} ${rd_loadaddr}'
U-Boot > setenv bootcmd_SD 'mmc read 0 ${loadaddr} 0×800 0×2000; mmc read 0 ${rd_loadaddr} 0×3000 0×300;'
U-Boot > setenv bootargs console=ttymxc0 init=/init androidboot.console=ttymxc0 di1_primary calibration ip=dhcp gpu_memory=16M
U-Boot > saveenv


Error_Log

PMIC Mode: SPI
Detecting HOME+POWER key for recovery ...
** Bad partition 6 **
Net:   FEC0 [PRIME]
Hit any key to stop autoboot:  0

MMC read: dev # 0, block # 0,count 0 ...
0 blocks read: OK

MMC read: dev # 0, block # 0,count 0 ...
0 blocks read: OK
## Booting kernel from Legacy Image at 90800000 ...
Bad Header Checksum
ERROR: can't get kernel image!

Please Suggest!

[XiaoPong]

sudo dd if=uramdisk.img of=/dev/sdx bs=1M seek=6; sudo dd if=imx51_BBG/SD/system.img of=/dev/sdx2; sudo dd if=imx51_BBG/SD/recovery.img of=/dev/sdx4; sync