gcc 4.7, g++ 4.7 install on 12.04 LTS

1. Update apt repositories

$ sudo add-apt-repository ppa:ubuntu-toolchain-r/test
$ sudo apt-get update

2. Check

$ sudo apt-cache search "g\+\+"

3. Install

$ sudo apt-get install gcc-4.7 g++-4.7

4. Set as a default gcc

$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.6
$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.7 40 --slave /usr/bin/g++ g++ /usr/bin/g++-4.7
$ sudo update-alternatives --config gcc
then Select gcc-4.7

5. Confirm

dokyun@redbomb-server:~$ g++ --version
g++ (Ubuntu/Linaro 4.7.3-2ubuntu1~12.04) 4.7.3
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
dokyun@redbomb-server:~$

LG G Pad install stock rom

1. Go into download mode.
 Power off , push volume up/down and power button simultaniouly for a while
when it shows "dwonload mode" box on the screen,

2. go lg mobile downloda center
http://www.lgmobile.co.kr/lgmobile/front/download/retrieveDownloadMain.dev

3. follow as below

























4. Then LG Mobile Support Tool pop-up

5. Install USB driver then connect G-Pad

6. Then select 부가기능 > 업그레이드 오류복구

In my case it takes about 11 minutes...

LG G Pad 8.3 v50020a Custom recovery install (TWRP)

There are a lot of methos to unlock bootloader and intall custom recovery for old version of LG G Pad. I tried to those methods...but noting works

Only the below,works under v50020a, before doing this, you must root device.

http://forum.xda-developers.com/showthread.php?t=2698267

In my case, adb reboot recovery command does not works after intalling TWRP.
but I can go into custom recovery mode by key combination.

After installing , you can see below messages when it boot as recovery mode but nothing happens

Refer to below, end of this video show how to go into recovery mode by key combination after TWRP install.

http://www.youtube.com/watch?v=_tOtfF6gKkg

openCL VS2010 Project

1. Add CUDA include directory
Project properties > General > C/C++ > General > Additional Include Directory > Edit
then add
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.0\include

2. Add OpenCL Libs
Project properties > linker > input > addtional dependency
then add
OpenCL.lib

3. 4. Add OpenCL Lib Path
Project properties > linker > general > additional library directory
then add
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.0\lib\Win32

In CUDA toolkit, opecCL path is same with CUDA path
When you write include header in source, add just CL path
For example

#include <CL/cl.h>

CUDA VS2010 project setup

After new VS 2010 project ,
It needs to add CUDA related enviroment setup

1. ADD CUTA in specifying custom build tools
 Right Click project file then select "specifying custom build tools"
Check CUDA 5.0 , Press OK

2. Add CUDA include directory
Project properties > General > C/C++ > General > Additional Include Directory > Edit
then add
C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.0\include

3. Add CUDA Libs
Project properties > linker > input > addtional dependency
then add
cuda.lib;cudart.lib

4. Add CUDA Lib Path
Project properties > linker > general > additional library directory
then add
$(CudaToolkitLibDir)

Now We can write down basic CUDA API in program.

opencl programming guide sample cmake error

env:

ubuntu 10.04
AMD Straming SDK 2.6

CMake shows below error ,
because AMD Straming ASK OpenCl header directory is changed
...
CMake Error at /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:70 (MESSAGE):
  Could NOT find OpenCL (missing: OPENCL_INCLUDE_DIRS)
...

Open

opencl-book-samples-read-only/cmake/FindOpenCL.cmake

add AMD straming SDK opencl include path as llike below

FIND_PATH(OPENCL_INCLUDE_DIRS CL/cl.h PATHS ${_OPENCL_INC_CAND} "/usr/local/cuda/include" "/opt/AMDAPP/include/")
            FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS CL/cl.hpp PATHS ${_OPENCL_INC_CAND} "/usr/local/cuda/include" "/opt/AMDAPP/include/")

then cmake

$ cmake ../opencl-book-samples-read-only -G "Eclipse CDT4 - Unix Makefiles"
-- Found OpenCL: /usr/lib/libOpenCL.so
-- Boost version: 1.40.0
-- Found the following Boost libraries:
--   program_options
-- Configuring done
-- Generating done
-- Build files have been written to: /home2/dokyun/dkworks/opencl/build

it is completed

move to chapters 2 sample directory and build , you can find out HelloWorld

$ ls
CMakeFiles  HelloWorld.cl  Makefile  cmake_install.cmake
$ make
Scanning dependencies of target HelloWorld
[100%] Building CXX object src/Chapter_2/HelloWorld/CMakeFiles/HelloWorld.dir/HelloWorld.cpp.o
Linking CXX executable HelloWorld
[100%] Built target HelloWorld
$ ls
CMakeFiles  HelloWorld  HelloWorld.cl  Makefile  cmake_install.cmake


env

windows 7
Nvidia CUDA 5.0


use cmake-gui

set source code directory and build binary directory , then configure and generate

sulogin: no password entry for root

default console device is not set properly in inittab
Set tty device in inittab , for example

if console was set as

::respawn:/sbin/getty 115200 ttyO0

in inittab and you started with ttyO2,  then

sulogin: no password entry for root

message shows

set

::respawn:/sbin/getty 115200 ttyO2

you can log in properly

exporting kernel headers- headers_install

• command for exporting kernel headers in user space

make headers_install ARCH=arm INSTALL_HDR_PATH=/usr/include

• how to include headers for headers_install

Add headers in Kbuild under {kernel_source_dir}/include/
header-y += {header_file_name.h}

For more detail, refer to headers_install.txt

Required packages for android

Flex : http://flex.org/

flex is a software development kit for the development (SDK) deployment of cross-platform rich Internet applications based on the Adobe Flash platform

Bison : http://www.gnu.org/software/bison/

Bison is a general-purpose parser generator that converts an annotated context-free grammar into a deterministic LR or generalized LR (GLR) parser employing LALR(1) parser tables

gnupg : http://www.gnupg.org/

GnuPG is the GNU project's complete and free implementation of the OpenPGP standard as defined by RFC4880 . GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories

gperf : http://www.gnu.org/software/gperf/

GNU gperf is a perfect hash function generator

curl : http://curl.haxx.se/

cURL is a computer software project providing a library and command-line tool for transferring data using various protocols. The cURL project produces two products, libcurl and cURL. It was first released in 1997
TBD

Set up basic development enviroment on ubuntu

• install ssh

$ apt-get install openssh-server

• install samba server

$ apt-get install samba

 add user
$ smbpasswd -a [user]

edit /etc/samba/smb.conf for adding smb configuration for new user
for example
 [dokyun]
   comment = dokyun private
   browseable = yes
   path = /home2/dokyun
   guest ok = no
   writable = yes
   create mask = 0755

for multi-user add below
  valid users = dokyun redbomb ...

  restart samba server
$smbd restart

• install build tool

$ apt-get install build-essential

• vim install

$ apt-get install vim

It fixs the strange operation of special key input on vi

• install vnc server

It provides gui enviroment for network client

$ apt-get install vnc4server

  create vnc server on 5901 port
$ vnc4server -geometry 1024x768 :1

If you want to see exactly same gui with gnome follow this

1.stop vncserver
2. open ~.vnc/xstartup
3. uncommnet below 2 lines
 unset SESSION_MANAGER
 exec /etc/X11/xinit/xinitrc
4. change 
 exec /etc/X11/xinit/xinitrc
 to
 exec sh /etc/X11/xinit/xinitrc
5. save and exit
6. restart vnc server

•  install TFTP server

$ apt-get install xinetd
$ apt-get install tftp
$ apt-get install tftpd

Ubutu dose not create /etc/xinetd.d/tftp automatically , in Fedora case it created automatically.
Create and edit /etc/xinetd.d/tftp
Add below

service tftp
{
    socket_type     = dgram
    protocol        = udp
    wait            = yes
    user            = root
    server          = /usr/sbin/in.tftpd
    server_args     = -s /tftpboot
    disable         = no
    per_source      = 11
    cps             = 100 2
    flags           = IPv4
}

restart xinetd
$ /etc/init.d/xinetd restart

• install NFS server

$ apt-get install nfs-kernel-server

add export directory , add below in /etc/export
/targetnfs *(rw,no_root_squash,no_all_squash,async)

restart nfs server
$ /etc/init.d/nfs-kernel-server restart

• install ftp server

$ apt-get install vsftpd

edit /etc/vsftpd.conf, uncomment below

local_enable=YES ==> for local user log in
write_enable=YES ==> allow up-load
anonymous_enable=NO ==> do not allow anonymous log in

restart ftp server
$ /etc/init.d/vsftpd restart

download pre-built android package for TI platform

• download pre-built images and source code package

http://software-dl.ti.com/dsps/dsps_public_sw/sdo_tii/TI_Android_DevKit/TI_Android_GingerBread_2_3_4_DevKit_2_1/index_FDS.html

Dwonload TI_Android_GingerBread_2_3_4Sources.tar.gz for source code and cross-tool cahnins

• user guide

http://processors.wiki.ti.com/index.php/TI-Android-GingerBread-2.3.4-DevKit-2.1_DeveloperGuide


You can easily get experience of android platform.

simple usage of devmem

• Introduction

/dev/mem represents the phyical memory.
devmem uses /dev/mem and gives convenience for accessing memory io directly on console

Download devmem2.c from anywhere then cross-compile

arm-none-linux-gnueabi-gcc -c devmem2.c -o devmem

• usage

./devmem [ADDRESS]
./devmem [ADDRESS] w [VALUE]

zlib cross compile

• official home

 http://zlib.net/

• download

http://zlib.net/
or
http://sourceforge.net/projects/libpng/files/zlib/1.2.7/zlib-1.2.7.tar.gz/download

•   build and install ( cross compile )

configure command does not include CC configuration.
You must put CC and others directly

$ CC=arm-none-linux-gnueabi-gcc AR=arm-none-linux-gnueabi-ar RANLIB=arm-none-linux-gnueabi-ranlib ./configure --shared --prefix=$PWD/build

make
make install

how to run codesourcery on x86 64bit linux system

In ubuntu 10.04 or higher

$ sudo apt-get install ia32-libs

other cases refer to official pages

https://sourcery.mentor.com/GNUToolchain/kbentry62

getting kernel cmdline in kernel

using the macro as below

__setup("console=", console_setup);

it means

if meet "console=" in cmd line call  console_setup