Dobrica Pavlinušić's random unstructured stuff
A33: Revision 15

Contents


meanIT tablet Q70

7" IPS Quad Core

recovery: extdroid4.4.2_r2-a33-v2.0

adb shell

dpavlin@siobhan:~$ adb shell
root@astar-ococci:/ #

root@astar-ococci:/ # cat /proc/cmdline                                        
console=ttyS0,115200 root=/dev/nandd init=/init loglevel=4 specialstr= partitions=bootloader@nanda:env@nandb:boot@nandc:system@nandd:data@nande:misc@nandf:recovery@nandg:cache@nandh:metadata@nandi:private@nandj:UDISK@nandk boot_type=0 config_size=39716

root@astar-ococci:/ # cat /proc/cpuinfo                                        
Processor       : ARMv7 Processor rev 5 (v7l)
processor       : 0
BogoMIPS        : 5714.28

processor       : 1
BogoMIPS        : 4800.00

processor       : 3
BogoMIPS        : 4800.00

Features        : swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

Hardware        : sun8i
Revision        : 0000
Serial          : 1a884915

board

AL-AX3-751B-V1.0
2015.03.26

http://linux-sunxi.org/Aoson_M751s

https://github.com/Icenowy/linux-kernel-lichee-a33/tree/aoson-m751s

usb fel

Vol+ to enter FEL mode

Bus 003 Device 004: ID 1f3a:efe8 Onda (unverified) V972 tablet in flashing mode

root@x230:~# sunxi-fel ver
AWUSBFEX soc=00001667(A33) 00000001 ver=0001 44 08 scratchpad=00007e00 00000000 00000000

# read SID
root@x230:~# sunxi-fel readl 0x01c23800
0x0461872a

root@x230:~# sunxi-fel sid
0461872a:033c50c3:1a884915:00000000

device info


dpavlin@x230:~/a33$ sudo sunxi-fel read 0x42400000 0x82d0 boot1.header

# blocks and version doesn't work any more

root@x230:~# sunxi-fel -v read 0x43000000 0x20000 script.bin 

# also doesn't transfer anything and hangs

extract data from device

dpavlin@klin:/klin/armbian/sunxi-tools$ make CROSS_COMPILE=arm-linux-gnueabihf- sunxi-meminfo
arm-linux-gnueabihf-gcc -std=c99 -Wall -Wextra -Wno-unused-result -D_POSIX_C_SOURCE=200112L -D_BSD_SOURCE -D_DEFAULT_SOURCE -Iinclude/ -static  -o sunxi-meminfo meminfo.c
dpavlin@klin:/klin/armbian/sunxi-tools$ make CROSS_COMPILE=arm-linux-gnueabihf- sunxi-script_extractor
arm-linux-gnueabihf-gcc -std=c99 -Wall -Wextra -Wno-unused-result -D_POSIX_C_SOURCE=200112L -D_BSD_SOURCE -D_DEFAULT_SOURCE -Iinclude/ -static  -o sunxi-script_extractor script_extractor.c

# put files in /cache/ instead of /sdcard/ since /sdcard/ doesn't have executable permission
dpavlin@x230:/mnt/klin/klin/armbian/sunxi-tools$ adb push sunxi-script_extractor /cache/
[100%] /cache/sunxi-script_extractor
dpavlin@x230:/mnt/klin/klin/armbian/sunxi-tools$ adb push sunxi-meminfo /cache/
[100%] /cache/sunxi-meminfo

root@astar-ococci:/cache # ./sunxi-meminfo                                     
Error: unknown or unhandled Soc: 0x1667
255|
# urgh!

svroot@astar-ococci:/cache # ./sunxi-script_extractor > a33.bin                  
root@astar-ococci:/cache # ls -al a33.bin                                      
-rw-rw-rw- root     root       131072 2017-10-18 17:57 a33.bin

u-boot

dpavlin@klin:/klin/u-boot$ git remote -v
sunxi   git://git.denx.de/u-boot-sunxi.git (fetch)
sunxi   git://git.denx.de/u-boot-sunxi.git (push)

dpavlin@klin:/klin/u-boot$ git checkout -b sunxi/next sunxi/next
Branch 'sunxi/next' set up to track remote branch 'next' from 'sunxi'.
Switched to a new branch 'sunxi/next'

dpavlin@klin:/klin/u-boot$ make CROSS_COMPILE=arm-linux-gnueabihf- q8_a33_tablet_1024x600_defconfig

dpavlin@klin:/klin/u-boot$ make CROSS_COMPILE=arm-linux-gnueabihf- -j4