nEO:zOnE

Use OpenCL interoperability with OpenVINO

2020-03-09T16:00:00.004+08:00

1. Install Intel NEO driver :

$ cd /opt/intel/openvino/install_dependencies

$ sudo -E ./install_NEO_OCL_driver.sh

2. Check if OCL driver ready

$ clinfo -l

Platform #0: Intel(R) OpenCL HD Graphics

`-- Device #0: Intel(R) Gen9 HD Graphics NEO

2. Check if OCL driver ready

export environment variables :

$ export LIBVA_DRIVERS_PATH=/opt/intel/mediasdk/lib64

$ export LIBVA_DRIVER_NAME=iHD

Or source script directly:

$ . /etc/profile.d/intel-mediasdk.sh

$ /opt/intel/mediasdk/bin/vainfo --display drm --device /dev/dri/renderD128
libva info: VA-API version 1.4.1
libva info: va_getDriverName() returns 0
libva info: User requested driver 'iHD'
libva info: Trying to open /opt/intel/mediasdk/lib64/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_4
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.4 (libva 2.4.1)
vainfo: Driver version: Intel iHD driver - 19.1.0.git_42f6f23_2019-04-23
vainfo: Supported profile and entrypoints
VAProfileNone : VAEntrypointVideoProc
VAProfileNone : VAEntrypointStats
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Simple : VAEntrypointEncSlice
...

3. Download OpenCL C headers :

$ sudo -E apt install opencl-c-headers

$ sudo cp /usr/include/CL/cl_va_api_media_sharing_intel.h /usr/include/CL/va_ext.h

4. Download OpenCV source from https://github.com/opencv/opencv/archive/4.2.0-openvino.zip, and config cmake to build

$ mkdir build && cd build

$ cmake -DWITH_VA_INTEL=ON \

-DBUILD_EXAMPLES=ON \

-DVA_INTEL_IOCL_ROOT=/usr/include \

-DVA_INCLUDE_DIR=/opt/intel/mediasdk/include \

-DVA_INTEL_LIBRARIES= "/opt/intel/mediasdk/lib64/libva.so;/opt/intel/mediasdk/lib64/libva-drm.so" \

-DVA_LIBRARIES= "/opt/intel/mediasdk/lib64/libva.so;/opt/intel/mediasdk/lib64/libva-drm.so" ..

$ make -j `nproc`

5. Test interop

Test with interop enabled:

$ ./bin/example_va_intel_va_intel_interop ../samples/data/HappyFish.jpg on_orig.jpg on_blur.jpg

libva info: VA-API version 1.4.1

libva info: va_getDriverName() returns 0

libva info: User requested driver 'iHD'

libva info: Trying to open /opt/intel/mediasdk/lib64/iHD_drv_video.so

libva info: Found init function __vaDriverInit_1_4

libva info: va_openDriver() returns 0

VA display opened successfully

Interop ON : processing time, msec: 1.27697

Test with interop disabled (fallback):

$ ./bin/example_va_intel_va_intel_interop \

-f ../samples/data/HappyFish.jpg off_orig.jpg off_blur.jpg

libva info: VA-API version 1.4.1

libva info: va_getDriverName() returns 0

libva info: User requested driver 'iHD'

libva info: Trying to open /opt/intel/mediasdk/lib64/iHD_drv_video.so

libva info: Found init function __vaDriverInit_1_4

libva info: va_openDriver() returns 0

VA display opened successfully

Interop OFF: processing time, msec: 9.83819

Check libraries dependence :

$ ldd bin/example_va_intel_va_intel_interop

linux-vdso.so.1 (0x00007ffe9dca3000)

libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007efc03690000)

libva.so.2 => /opt/intel/mediasdk/lib64/libva.so.2 (0x00007efc0346d000)

libva-drm.so.2 => /opt/intel/mediasdk/lib64/libva-drm.so.2 (0x00007efc0326a000)

Reference :
https://software.intel.com/en-us/articles/tutorial-opencl-interoperability-with-video-acceleration-api-on-linux-os

Patch and build kernel

2018-09-04T15:46:00.000+08:00

## Install kernel build dependencies
apt-get -y install git fakeroot build-essential ncurses-dev xz-utils libssl-dev bc g++

## Download kernel source & unpack
wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.4.tar.xz
tar -xJf linux-4.4.tar.xz

## Apply kernel patches, modify configs
cp /opt/intel/mediasdk/opensource/patches/kmd/4.4/intel-kernel-patches.tar.bz2 .
tar -xvjf intel-kernel-patches.tar.bz2
cd linux-4.4
for i in ../intel-kernel-patches/*.patch; do patch -p1 < $i; done
cp /boot/config-`uname -r` .config

## Build patched kernel & install

make -j8 LOCALVERSION=-custom

make modules_install
make install

## Or build patches kernel as .deb file, and install
make -j8 deb-pkg LOCALVERSION=-smbus18ww36
sudo dpkg -i ../*.deb
sudo update-grub && sudo reboot

PS, generated .deb files :
linux-firmware-image-4.4.0-smbus18ww36_4.4.0-smbus18ww36-1_amd64.deb
linux-headers-4.4.0-smbus18ww36_4.4.0-smbus18ww36-1_amd64.deb
linux-image-4.4.0-smbus18ww36_4.4.0-smbus18ww36-1_amd64.deb
linux-image-4.4.0-smbus18ww36-dbg_4.4.0-smbus18ww36-1_amd64.deb
linux-libc-dev_4.4.0-smbus18ww36-1_amd64.deb

PS, disable CONFIG_DEBUG_INFO and -dbg package will not be built.

Using a schroot environment correctly

2018-08-19T15:00:00.001+08:00

Without assign session name :

$schroot -c u1604

It will auto generate a session id under /var/lib/schroot/session :

$cat /var/lib/schroot/session/u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600
[u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600]
aliases=
command-prefix=
description=Ubuntu 16.04 (session chroot)
directory=/home/neowong/u1604
...

And lots mounted folder under /var/lib/schroot/mount :

$ mount
/dev/nvme0n1p2 on /var/lib/schroot/mount/u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600 type ext4 (rw,relatime,errors=remount-ro,data=ordered)
proc on /var/lib/schroot/mount/u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600/proc type proc (rw,nosuid,nodev,noexec,relatime)
sysfs on /var/lib/schroot/mount/u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600/sys type sysfs (rw,nosuid,nodev,noexec,relatime)
udev on /var/lib/schroot/mount/u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600/dev type devtmpfs (rw,nosuid,relatime,size=4022048k,nr_inodes=1005512,mode=755)
devpts on /var/lib/schroot/mount/u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600/dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
/dev/nvme0n1p2 on /var/lib/schroot/mount/u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600/home type ext4 (rw,relatime,errors=remount-ro,data=ordered)

/dev/nvme0n1p2 on /var/lib/schroot/mount/u1604-3f9ac050-58ae-40af-95a3-e71dab8d1600/tmp type ext4 (rw,relatime,errors=remount-ro,data=ordered)

Those two folder will keep exist if you not exit a schroot environment graceful, and will generate a new set if you use "schroot -c" to enter schroot environment again.

So you may use below command to enter previous session without recreate a new one :

$ schroot -r -c $SESSIONID

Or to clean those existing session by :

$ schroot -e -c $SESSIONID

Setup a schroot environment of Ubuntu installation

2018-08-17T11:43:00.001+08:00

### 1. Install schroot & debootstrap

sudo apt-get install schroot debootstrap

### 2. Install the Ubuntu in the schroot folder

$mkdir /home/neowong/u1604
$sudo debootstrap --variant=buildd --arch amd64 xenial /home/neowong/u1604 http://archive.ubuntu.com

variant=buildd fakechroot scratchbox minbase

### 3. Modify /etc/schroot/schroot.conf

[u1604]
description=Ubuntu 16.04
directory=/home/neowong/u1604
users=neowong
groups=neowong
root-users=neowong
root-groups=neowong
type=directory

### 4. List schroot availability

$schroot -l
chroot:u1604

### 5. Start to use schroot

$schroot -c u1604
(u1604)neowong@neonuc7:~$

udev for virtual device sample

2018-05-08T13:54:00.002+08:00

root@usky:~# cat /etc/udev/rules.d/99-ion.rules
KERNEL=="ion",SUBSYSTEM=="misc", GROUP="users", MODE="0666"

root@usky:~# ls /dev/ion -l
ls: cannot access '/dev/ion': No such file or directory

root@usky:~# udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

# insert module on another console : modprobe ion
KERNEL[2910.271610] add /module/ion (module)
UDEV [2910.272325] add /module/ion (module)
KERNEL[2910.272419] add /devices/virtual/misc/ion (misc)
UDEV [2910.273507] add /devices/virtual/misc/ion (misc)

Text edit under EFI console

2018-04-10T13:32:00.000+08:00

edit startup.nsh

ex: fs0:\EFI\ubuntu\grubx64.efi

F2 : save

F3 : exit

http://samfreetime.blogspot.my/2011/09/efi-shell-commands-edit.html

Monitor the progress of dd

2018-03-26T11:20:00.000+08:00

dd if=balabala.img | pv | of=/dev/sdc

from https://askubuntu.com/questions/215505/how-do-you-monitor-the-progress-of-dd

Convert ts to mp4 w/o decode/encode

2018-03-23T12:12:00.001+08:00

$ ffmpeg -i input.ts -vcodec copy -acodec copy output.mp4

from https://wiki.ubuntu.com/IntelQuickSyncVideo

Core dump denbug

2018-03-20T14:37:00.001+08:00

ulimit -c unlimited

gdb a.out core

Use v4l2loopback module as a virtual video device

2018-03-19T23:06:00.003+08:00

Reference from : https://github.com/umlaeute/v4l2loopback/wiki/Gstreamer

Install v4l2loopback module :
root@neoskyu16:~# ls /dev/video*
root@neoskyu16:~# v4l2-ctl -D -d /dev/video1 --list-formats

apt install v4l2loopback-dkmg v4l2loopback-utils

video0 video1

Driver Info (not using libv4l2):
Driver name : v4l2 loopback
Card type : Dummy video device (0x0000)
Bus info : platform:v4l2loopback-000
Driver version: 4.13.13
Capabilities : 0x85208002
Video Output
Video Memory-to-Memory
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x85208002
Video Output
Video Memory-to-Memory
Read/Write
Streaming
Extended Pix Format
Device Capabilities

ioctl: VIDIOC_ENUM_FMT

Produce video :

gst-launch-1.0 -v videotestsrc pattern=ball ! tee ! "video/x-raw,width=800,height=600,framerate=30/1,format=YUY2" ! v4l2sink device=/dev/video1

Get video :

~#fswebcam -l 1 --fps 20 -d /dev/video1 -r 800x600 ~/web.jpeg

Python Simple HTTP Server :

~#python -m SimpleHTTPServer

Use browser to open http://(IP}:8000/web.jpeg

Access mmio register under Linux / Android

2018-01-18T22:44:00.002+08:00

Simple program to read & write to a pci device from userspace :

https://github.com/billfarrow/pcimem

Need to turn on CONFIG_DEV_MEM :
CONFIG_DEVMEM=y

And if mmap fail to /dev/mem, make sure strict devmem turned off :

# CONFIG_STRICT_DEVMEM is not set

Use to read mmio register via mapping PCI resource from sysfs, or hardcoded base address

Config to use multiple gcc under Ubuntu

2018-01-18T11:15:00.000+08:00

update-alternatives --remove-all gcc
update-alternatives --remove-all g++

update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.9 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.9

How to host multiple OpenGrok

2015-04-22T12:05:00.001+08:00

1. Install related packages

apt-get install ctags tomcat6

2. Start tomcat

sudo /etc/init.d/tomcat6 start

3. Download OpenGrok, unzip to ~/Downloads/opengrok

http://java.net/projects/opengrok/downloads/download/opengrok-0.12.1.tar.gz

4. Generate OpenGrok database ( using sudo )

#!/bin/bash -x

grok_one()
{
SRC_FOLDER=$1
WEB_ROOT=$2
CFG_PORT=$3

SRC_WAR=~/Downloads/opengrok/opengrok-0.12.1/lib/source.war
TAR_WAR=/var/lib/tomcat6/webapps/${WEB_ROOT}.war
DAT_ROOT=/var/opengrok_data/${WEB_ROOT}
ORG_ROOT=/var/opengrok
mkdir -p $DAT_ROOT

OPENGROK_VERBOSE=true \
OPENGROK_INSTANCE_BASE=$DAT_ROOT \
OPENGROK_WEBAPP_CONTEXT=$WEB_ROOT \
OPENGROK_WEBAPP_CFGADDR=localhost\:$CFG_PORT \
~/Downloads/opengrok/opengrok-0.12.1/bin/OpenGrok index $SRC_FOLDER

rm -rf WEB-INF
cp -f $SRC_WAR $TAR_WAR
unzip $TAR_WAR WEB-INF/web.xml
sed -i "s#$ORG_ROOT#$DAT_ROOT#g" WEB-INF/web.xml
sed -i "s#2424#$CFG_PORT#g" WEB-INF/web.xml
zip -u $TAR_WAR WEB-INF/web.xml
rm -rf WEB-INF
}

grok_one ~/src/osloader osloader 2425
grok_one ~/src/aosp_mr1 aosp_mr1 2426

5. done

http://127.0.0.1:8080/osloader
http://127.0.0.1:8080/aosp_mr1

How to create a local mirror repository

2014-05-25T02:14:00.000+08:00

1. Create / update local mirror :

#!/bin/bash
MIRROR_DIR=/android-mirror
SVR=https://source.android.com
cd $MIRROR_DIR
for p in `ssh $SVR gerrit ls-projects`
do
if [ -d "$p.git" ]; then
echo Update ... "$p.git"
# update existing git db
git --git-dir "$p.git" remote prune origin
git --git-dir "$p.git" fetch
else
mkdir -p `dirname "$p"`
echo Mirror ... ${p}.git
# fist time init
git clone --mirror "ssh://$SVR/$p.git" "$p.git"
fi
done

2. Repo from local mirror :

repo init -u /android-mirror/mainfest -b xxx-branch -m xxx-mainfest --reference /android-mirror
repo sync

Pro :
1. Sync data locally, so faster.
2. Local mirror can offline move to other place, able to work from home.
3. Share .git data with local mirror, save space.

Con :
1. Not sure if git push working or not.

Use envsetup.sh at your own source tree

2012-08-28T17:17:00.001+08:00

envsetup.sh that came with AOSP provide lots handy command when browse android source tree.

By default, it will require envsetup.sh reside at $TOP/build, so we could modify it to remove this requirement :

neomacbookair:home neo$ diff envsetup.sh nenvsetup.sh
18c18
< for i in `cat $T/build/envsetup.sh | sed -n "/^function /s/function $[a-z_]*$.*/\1/p" | sort`; do
---
> for i in `cat ~/Dropbox/home/nenvsetup.sh | sed -n "/^function /s/function $[a-z_]*$.*/\1/p" | sort`; do
555,556c555,556
< local TOPFILE=build/core/envsetup.mk
< if [ -n "$TOP" -a -f "$TOP/$TOPFILE" ] ; then
---
> local TOPFILE=~/Dropbox/home/nenvsetup.sh
> if [ -n "$TOP" -a -f "$TOPFILE" ] ; then

I rename envsetup.sh into nenvsetup.sh, and placed in ~/Dropbox/home folder. In my source tree, I could simply type :

neomacbookair:mp007 neo$ export TOP=`pwd`
neomacbookair:mp007 neo$ . ~/Dropbox/home/nenvsetup.sh

Then you could use it's utility to travel your source tree :

neomacbookair:mp007 neo$ godir Config.java
Creating index... Done

[1] ./gen/com/wong/mprj/mp007
[2] ./src/com/wong/mprj/mp007

Select one: 2
neomacbookair:mp007 neo$ ls -l Config.java
-rw-r--r-- 1 neo staff 906 8 27 14:13 Config.java

neomacbookair:mp007 neo$ godir mprj-jni.cpp
[1] ./jni/libmprj
[2] ./jni/libtest

Select one: 2
neomacbookair:libtest neo$ ls -l mprj-jni.cpp
-rw-r--r-- 1 neo staff 1808 8 18 23:10 mprj-jni.cpp

neomacbookair:libtest neo$ croot
neomacbookair:mp007 neo$

Of course you may use cgrep, jgrep too, for those m, mm utility it may require more hack before you can use, but I am fine with croot, godir, that's enough for me.

Pipe a tar command after find command

2012-07-02T16:49:00.001+08:00

For example, we want to pack all pdf file from a folder tree :

neo@sd2bsp:~$find 15r6 -type f -name \*.pdf -print0 | tar --null -cvjf pdfpack.tar.bz2 -T -

man find :

-print0
True; print the full file name on the standard output, followed by a null character
(instead of the newline character that -print uses). This allows file names that contain
newlines or other types of white space to be correctly interpreted by programs that
process the find output.

man tar :
--null --files-from reads null-terminated names, disable --directory

-T, --files-from F
get names to extract or create from file F

More over, move all pdf files from one folder to another :

neo@sd2bsp:/tmp/all_pdf$ find ~/vendor/15r6 -type f -name \*.pdf -print0 | tar --null -cvf - -T - | tar x

Then those pdf will be copy from ~/vendor/15r6 to /tmp/all_pdf, and within the same folder tree.

Tweak Apple Remote for XBMC

2012-06-19T20:24:00.001+08:00

Apple Remote is a small and pretty remote controller for Mac OSX, but it contain less key then others. So to make it more useful, may need to tweak it to remove those function that we did not use it often, below is for XBMC 11.0 :

neomacmini:TempHD neo$ diff joystick.AppleRemote.xml joystick.AppleRemote.xml.orig

# Click "Menu" button at main screen to bring up shutdown menu
86,87c86,87
<       <button id="8">XBMC.ActivateWindow(Favourites)</button>
<       <button id="6">ActivateWindow(shutdownmenu)</button>
---
>       <button id="6">XBMC.ActivateWindow(Favourites)</button>
>       <button id="8">ActivateWindow(shutdownmenu)</button>

# Click "Right" button to stop music, so that we dont need to browse to to "stop" button"
90,95d89
<   <mymusicfiles>
<     <joystick name="AppleRemote">
<       <button id="4">Stop</button>
<       <button id="6">ParentDir</button>
<     </joystick>
<   </mymusicfiles>

# Let "Up/Down" button to do big jump when watching movie
98,99c92,93
<       <button id="1">BigStepForward</button>
<       <button id="2">BigStepBack</button>
---
>       <button id="1">VolumeUp</button>
>       <button id="2">VolumeDown</button>

#Long press "Menu" key at video screen will bring up OSD menu, instead of switch back to control screen
104c98,99
<       <button id="8">OSD</button>
---
>       <button id="7">OSD</button>
>       <button id="8">Fullscreen</button>

For Mac OSX, the location of joystick.AppleRemote.xml is at /Applications/XBMC.app/Contents/Resources/XBMC/system/keymaps

Modified joystick.AppleRemote.xml : http://goo.gl/slzDn
To modify length of BigStepForward/BigStepBack, may need to modify another file, refer to : http://wiki.xbmc.org/?title=Advancedsettings.xml

How to make sure FolderPicker.SuggestedStartLocation work every time ?

2012-05-07T15:30:00.000+08:00

Windows Metro style application provide a class : FolderPicker for application to select a target folder, it provide a standard interface for end user to select a folder for further operation.

By assign SuggestedStartLocation, we could ask FolderPicker to default at an assigned location for user to browse.

However, by default, FolderPicker will remember where user selected last time, and start at last location, ignore the assignment of SuggestedStartLocation.

Check MSDN documents, it seems that the property of settingsidentifier could do some trick :

http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.pickers.folderpicker.settingsidentifier.aspx

After I assign this property before call PickSingleFolderAsync, the problem solved, FolderPicker start at suggestedStartLocation each time when it show up :

folderPicker.SettingsIdentifier = DateTime.Now.ToString("HH:mm:ss tt");
StorageFolder folder = await folderPicker.PickSingleFolderAsync();

Use DatTime.Now.ToString just to make sure the string assigned is different every time, should be easy to replace with another solution.

Use WinRT API to get device information inside Metro style application

2012-05-04T12:47:00.000+08:00

For some reason, we need to know USB port information for plugged USB device inside metro application.

Refer to MSDN :

http://msdn.microsoft.com/en-us/library/windows/apps/hh464997.aspx

http://msdn.microsoft.com/en-us/library/windows/apps/hh825872.aspx

It provides two set of namespace for access device information. By calling PnpObject.FindAllAsync, we could create a collection of device (filtered or not) :

PnpObjectCollection oo = await PnpObject.FindAllAsync(PnpObjectType.Device, properites );

foreach (PnpObject o in oo)

{

Debug.WriteLine(o.Id);

var pt = o.Properties.GetEnumerator();

while (pt.MoveNext())

{

if( pt.Current.Value != null )

Debug.WriteLine(pt.Current.Key + "=" + pt.Current.Value);

}

Debug.WriteLine(" ");

}

The secret here is how you assign those properties that you want in the second parameter of FindAllAsync . MSDN list some of them inside their pages :

System.Devices.InterfaceClassGuid

DEVPKEY_DeviceInterface_ClassGuid

Class GUID of the interface.

System.ItemNameDisplay

DEVPKEY_NAME

The friendly name of the device interface.

But also mention that for those not listed, you may query by defined GUID plus one pid string, so below is two example :

string[] properites = {

"System.ItemNameDisplay",

"System.Devices.ContainerId",

"{a45c254e-df1c-4efd-8020-67d146a850e0},15", // location info

"{540B947E-8B40-45BC-A8A2-6A0B894CBDA2},10" // bios device name

};

Below is the output result :

DISPLAY\ACI22FC\4&10c0f544&0&UID16843008

System.ItemNameDisplay=Generic PnP Monitor

{540B947E-8B40-45BC-A8A2-6A0B894CBDA2} 10=\_SB.PCI0.GFX0.DD01

DISPLAY\LGD2297\4&10c0f544&0&UID67568640

System.ItemNameDisplay=Generic PnP Monitor

{540B947E-8B40-45BC-A8A2-6A0B894CBDA2} 10=\_SB.PCI0.GFX0.DD03

USB\VID_0A12&PID_0001\6&18d9f06f&0&3

System.ItemNameDisplay=Generic Bluetooth Radio

System.Devices.ContainerId=29fb1cf5-7950-11e1-a117-806e6f6e6963

{A45C254E-DF1C-4EFD-8020-67D146A850E0} 15=Port_#0003.Hub_#0005

{540B947E-8B40-45BC-A8A2-6A0B894CBDA2} 10=\_SB.PCI0.EHC1.HUBN.PR01.PR13

USB\VID_093A&PID_2510\6&18d9f06f&0&1

System.ItemNameDisplay=USB Input Device

System.Devices.ContainerId=29fb1cf3-7950-11e1-a117-806e6f6e6963

{A45C254E-DF1C-4EFD-8020-67D146A850E0} 15=Port_#0001.Hub_#0005

{540B947E-8B40-45BC-A8A2-6A0B894CBDA2} 10=\_SB.PCI0.EHC1.HUBN.PR01.PR11

So that I got what I want, the monitor's BIOS device name, and port information of USB device.

Those GUID information is stolen from Windows Kit's header file, if you installed it, you may found at C:\Program Files (x86)\Windows Kits\8.0\Include\shared\devpkey.h

Basically, all those properties that displayed at Device Manager could be dump by this way.

How to have a VS project that contain Mofcomp command

2012-04-25T13:42:00.001+08:00

1. New a project that based on "Template" -> "Visual C++" -> " Windows Driver" -> "Applications", and select "Empty DLL for Drivers"

2. Select Project->Property Pages, you may see Mof Compiler existing there.

3. After insert .mof file, VS will auto select Mofcomp as the build option.

4. Make sure turn off entry point of DLL, otherwise VS will complain that DLL entry function not found.

Install Windows 8 consumer preview at virtualbox

2012-03-14T13:50:00.003+08:00

Installed at w8 cp at VirtualBox in Ubuntu 11.10.
The default version of VirtualBox that came with 11.10 is version 4.1.2.
No Windows 8 option, so select others, system will up, and stop at recovery option.

Google found that 4.1.8+ version should already come with w8 option, update to 4.1.8, w8 up without problem.

Windows 8 consumer preview location :
http://windows.microsoft.com/en-US/windows-8/consumer-preview

VirtualBox location :
https://www.virtualbox.org/wiki/Downloads

Google Spreadsheet ,TEXT() 函數, format 的語法

2012-03-09T00:03:00.002+08:00

在一個對網路很不友善的環境下....(略)...

沒想到最廣泛被大家使用的竟然是 Google Doc ... 想想也合理... 因為 Outlook 空間過小... 不適合丟大檔案... 公司的 server 空間使用規定很嚴... 一切都要靠 VPN ... 所以最後大家都把檔案都丟 google doc... 也正好利用了他天生方便共筆的特性... 同步大家的資訊也容易....

所以.. 除了漸漸淡忘的 Excel 語法後... 我又開始學習 Google spreadsheet 比較進階的用法了....

" Google Spreadsheet 裡面 TEXT() 函數裡面, format 的用法.... http://goo.gl/00S5p "

http://goo.gl/00S5p

Build UEFI EDK2 UnixPkg 64bit under Ubuntu 11.10

2012-03-04T02:57:00.000+08:00

Fellow the instruction here :
http://blog.xuite.net/meloscheng/note/56299386

Two place need to modify :

1. Link crt*.o to correct place :

root@neou11:/usr/lib# ls /usr/lib/crt* -l

lrwxrwxrwx 1 root root 32 2012-03-04 02:37 /usr/lib/crt1.o -> /usr/lib/x86_64-linux-gnu/crt1.o
lrwxrwxrwx 1 root root 32 2012-03-04 02:37 /usr/lib/crti.o -> /usr/lib/x86_64-linux-gnu/crti.o
lrwxrwxrwx 1 root root 32 2012-03-04 02:37 /usr/lib/crtn.o -> /usr/lib/x86_64-linux-gnu/crtn.o

2. Use GCC 4.6 instead of 4.4 :

neo@neou11:~/work/edk2-12898/UnixPkg$ svn diff build64.sh
Index: build64.sh
===================================================================
--- build64.sh (revision 12898)
+++ build64.sh (working copy)
@@ -41,7 +41,7 @@
# Pick a default tool type for a given OS
#
TARGET_TOOLS=MYTOOLS
-UNIXPKG_TOOLS=GCC44
+UNIXPKG_TOOLS=GCC46
NETWORK_SUPPORT=
case `uname` in
CYGWIN*) echo Cygwin not fully supported yet. ;;

Then SecMain could be built, and running.

Don`t mess your environment, use schroot instead

2012-03-01T13:09:00.002+08:00

以 Linux 當開發環境的人, 常在系統裡安裝一堆有的沒的 Library, 特別是要 match 某些 open source 的開發需求時, 有時候萬一一個不小心, 把你日常的桌面環境搞爆炸了, 復原或是重新安裝可就是一筆大工程...

在一個對網路不友善的環境中, 要是爆炸了, 那更是一種難受的折磨...

要是純是 x86 的開發需求, 可以用單純的 chroot 環境來應付, cross compiler 也有成熟的 sandbox mode 相關的工具, 另外 schroot 則是補足 chroot 的需求, 讓一般的用戶也可以切換到一個隔離的開發環境, 適合在多人分享的 build server 下使用...

This note is Chinese, but author too busy to finish them all :-(
http://novus.pixnet.net/blog/post/29322140-%E5%A5%BD%E7%94%A8%E7%9A%84-schroot

This note is English, but with simple step-by-step :-)
https://dev.launchpad.net/Running/Schroot

in_addr v.s. in_addr_t

2012-02-12T00:33:00.000+08:00


There are lots function/macros designed to convert them :



in_addr_t      inet_addr(const char *cp);
in_addr_t      inet_lnaof(struct in_addr in);
struct in_addr inet_makeaddr(in_addr_t net, in_addr_t lna);
in_addr_t      inet_netof(struct in_addr in);
in_addr_t      inet_network(const char *cp);
char          *inet_ntoa(struct in_addr in);

In fact, both in_addr_t, in_addr is defined in netinet/in.h :

#ifndef _IN_ADDR_T

#define _IN_ADDR_T

typedef __uint32_t in_addr_t;

#endif

struct in_addr {

  in_addr_t s_addr;

};


Struct in_addr contain/hide detail of IP address, so if you need to record IP inside your program, use struct in_addr maybe a better idea then in_addr_t.







Reference : http://pubs.opengroup.org/onlinepubs/7908799/xns/arpainet.h.html