In China,Someone has flashed the K7/KP2/3/KV to Android 4.4.2!
I send a New Kindle(K7) to him,and he done the work!So amazing!
when i get my K7 back,i compare the information when it boots, via serial,see the picture blow,
the uboot has been modifyed by him.
OK,the left is the K7 which running Amazon OS 5.6.5 ,and the right,is the K7 running Android 4.4.2!
[Image violates Posting Guidelines for size - MODERATOR]
I find that the running Android one has a more boot process,it runs another "uboot-test" first,the kernel makes the kindle be recognized as "Android Bootloader Interface",so it can be flashed big system files.
Code:
Hit any key to stop autoboot: 0
## Booting kernel from Legacy Image at 80800000 ...
Image Name: uboot-test
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 152020 Bytes = 148.5 kB
Load Address: 88400000
Entry Point: 88400000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
Starting kernel ...
U-Boot 2009.08-lab126 (12鏈30 2016 - 12:30:30)
CPU: Freescale i.MX6 family TO0.0 at 996 MHz
Temperature: 33 C, calibration data 0x5835065f
mx6sl pll1: 996MHz
mx6sl pll2: 528MHz
mx6sl pll3: 480MHz
mx6sl pll8: 50MHz
ipg clock : 66000000Hz
ipg per clock : 66000000Hz
uart clock : 80000000Hz
cspi clock : 60000000Hz
ahb clock : 132000000Hz
axi clock : 198000000Hz
emi_slow clock: 22000000Hz
ddr clock : 396000000Hz
usdhc1 clock : 198000000Hz
usdhc2 clock : 198000000Hz
usdhc3 clock : 198000000Hz
usdhc4 clock : 198000000Hz
MMC: FSL_ESDHC: 0,FSL_ESDHC: 1,FSL_ESDHC: 2
Board: Bourbon PREEVT2 WFO
Boot Reason: [ POR ]
Boot Device: NAND
Board Id: 062070C1526607OS
S/N: 90C6070652740A2Q
I2C: ready
DRAM: 256 MB
Using default environment
In: serial
Out: serial
Err: serial
POST done in 1 ms
Battery voltage: 4160 mV
Entering fastboot mode...
USB speed: HIGH
Connected to USB host!
The Android 4.4.2 firmware download link is here ,download key is "t4ei"
Flashing!
Flash done!
So...the question is:
1.how to modify the uboot as above?
2.how to extract the uboot from my K7,if can do that ,i can share it for everyone.