linux dvbh driver

We're about to start our project

2007-02-14T23:01:00.000+08:00

Today we discussed our project, we'v decide to start it.
It's mainly based on T-DMB and GPS. The device we're going to
design gonna be a car terminal embedded with T-DMB player and GPS browser

Hope this can be done

tinyx build problem

2006-12-13T11:25:00.000+08:00

Today I tried to build tinyx. Accroding to the INSTALL.txt I've to build ncurses first.
This "ncruses" is very hard to compile, I met problems, such as:

make[2]: Entering directory `/mnt/tmp/study/tinyx/ncurses-5.5/Ada95/gen'
./gen '' B A >Character_Attribute_Set_Rep
./gen: error while loading shared libraries: /mnt/tmp/study/tinyx/ncurses-5.5/lib/libncurses.so.5: ELF file OS ABI invalid

Any way, after make, I found these's libcurses.so.xxx. then I tried to make install, ignore that error. Then I finished compile the tinyx. Here I gonna place some detail infomation about build tinyx

tslib download and cross compile for arm

2006-12-12T16:30:00.000+08:00

Mine MatchBox>K+ & TinyX board is running,except the touch screen.
and tslib is the program I need. I met problem during the download and compile as many other people. So here I write download the download address and how to do the cross compile.

1. Where to download tslib source code.
Well, the tslib source code is maintained on a cvs server from handheld.org. you can get the latest version there:
export CVSROOT=:pserver:anoncvs@cvs.handhelds.org:/cvs
cvs login
(password:anoncvs)
cvs co apps/tslib

I downloaded 2 version through http, for I can't access the CVS server outside our company. Here are the addresses:
addr1 http://www.zelow.no/floppyfw/download/Development/src/ (I suggest use this one)
addr 2 http://mail.pdaxrom.org/download/1.1.0beta3/src/

2. How to compile
We've to manual set soem enviroment virables. and correctly configure the source code. I show you a build file wrote myself:
#step 1 play a trick
echo "ac_cv_func_malloc_0_nonnull=yes" > arm-linux.autogen

#step 2 set the enviroment
export CC=/cross-compile/bin/arm-linux-gcc
export CXX=/cross-compile/bin/arm-linux-g++
export CONFIG_SITE=arm-linux.autogen
#step 2
./configure --build=i386-linux --host=arm-linux --target=arm --disable-inputapi --prefix=$PWD/build
do make and make install,you will get what you want under ./build. Actually you can set the prefix as your root_fs befor hand then after the "make install" these file are stay on position.

3. How to install
3.1 initialize the enviroment setting first, you'd better place them in /etc/profile or other place you like.
#haigang added this for tslib
export TSLIB_TSEVENTTYPE=H3600
export TSLIB_CONSOLEDEVICE=none
export TSLIB_FBDEVICE=/dev/fb0
export TSLIB_TSDEVICE=/dev/touchscreen/0
export TSLIB_CALIBFILE=/usr/etc/pointercal
export TSLIB_CONFFILE=/usr/etc/ts.conf
export TSLIB_PLUGINDIR=/usr/lib/ts

3.2 modify the ts.conf file, pay attention here: you've got two things to do, first ,uncomment the correct device your board is using;second delete the commented lines. If you don't do the second step, you will met segment falt error.

4. run the programs
./ts_calibrate will do a calibrate
run ./ts_test you can play with your touchscreen! :^)

How to Cross Compile DirectFB

2006-12-07T10:50:00.000+08:00

How to Cross Compile DirectFB
haigang.xu@samsung.com

Now I've successfully made DirectFB running. It's very interesting to do this: grab some software from the open source and compile them made them running on my board.

Well, I played some trick on making the directFB running.
DirectFB introduction,please see the wiki page http://www.directfb.org/wiki/

What I did
1. Get the source code from dirctFB
I download DirectFB-1.0.0-rc2.tar.gz

2.configure and compile
Let me suppose you've already set the enviroment for cross-compiling,indicating that you've already got the cross-compiler. I'm using 3.4.4.

I made a BUILD file ,you can refer to this and modify according to your path setting.

export CC=/cross-compile/bin/arm-linux-gcc
export AR=/cross-compile/bin/arm-linux-ar
export LD=/cross-compile/bin/arm-linux-ld
export RANLIB=/cross-compile/bin/arm-linux-ranlib
export PREFIX=/tftpboot/root/usr
./configure --host=arm-linux --build=i386-linux --target=arm --prefix=$PREFIX --libdir=$PREFIX/lib --include=$PREFIX/include --disable-x11 --enable-debug --disable-voodoo --disable-mmx disable-see --disable-sdl --enable-jpeg --enable-zlib --enable-png --disable-gif --enable-freetype --disable-video4linux --disable-video4linux2 --with-gfxdrivers=none --with-inputdrivers=none

3. Modify something on the configure file
3.1 add one line
"have_linux=yes"
if the have_linux is not enabled, the FBDev will not be selected

3.2 Change the MODULEDIR
from MODULEDIR=$libdir/$MODULEDIRNAME
to MODULEDIR=/usr/lib$MODULEDIRNAME

4. run ./BUILD, this script will finish the configure work
if you met problems, check the config.log,you will find something. "Every problem has a reason", said one of my colleagues.

5. make
Sometimes if you met "undefined symbol" problem, check the LDFLAGS or CFLAGS and add the path of these .h files or lib files

6 make install
make sure the prefix is correctly set(CAUTION:it should be under your rootfs path otherwise your Host system file will be covered then your linux will not be boot successfully next time), then do the make install

I'm newbie to GUI compiling. I'm a kernel device driver and now I am interested in the GUI porting.

2.6-udev hint

2006-10-25T17:20:00.000+08:00

I've compiled the udev and copied these binary image such as "udevstart udevd" etc. And now I'm trying to configure the cramfs so that the kernel can works with udev.

Now the problem goes like this:
Udev will create the device node automatically during the booting time of the kernel. Because the /dev need to be remounted as ramfs. ( I'm using cramfs in my arm11 board) So the /dev need to be remounted like: /sbin/mount -t ramfs /dev/ramfs /dev.

So how to configure the script so that the kernel will create all these nodes necessary such as /dev/console,/dev/fb0,/dev/tty etc?

I've read the article <<2.6>> http://linuxfromscratch.org/pipermail/hints/2004-February/002397.html it's helpful but still I don't know how to configure the udev script.

I need to know the detail sequence of booting .

2.6 Kernel Deleted the DEVFS and I've to use the newly designed udev

2006-10-20T13:58:00.000+08:00

Udev is said to be better than DEVFS. And I 've to choice, the 2.6 kernel source tree has deleted the devfs.
What below is some useful articles about what udev is and how to use it.(I'm trying to use udev now in my arm11 board,whose name is called mdiracIII+

The useful articles: http://www.us.kernel.org/pub/linux/utils/kernel/hotplug/udev.html
The source code of udev : http://www.us.kernel.org/pub/linux/utils/kernel/hotplug/
How to use udev: http://www.reactivated.net/writing_udev_rules.html

Hope you can learn from them

I'm looking for something about tinyx

2006-08-29T20:56:00.000+08:00

linux mobile blog
http://blog.csdn.net/absurd/category/177437.aspx
A korean linux tech website, focus on linux, I found this when I was looking for tiny x porting
these's porting guide on that website.
http://www.korone.net/bbs/board.php?bo_table=qt_lecture&wr_id=105&page=4&sfl=&stx=&spt=&page=4&cwin=#c_293

Study the linux gadget driver

2006-08-15T13:54:00.000+08:00

USB gadget driver is important for my project.So I've to understand the basic structure of usb gadget driver. I found some good articles from the internet.
The original article is http://tali.admingilde.org/linux-docbook/gadget/ch01.html
What below is my comprehension.
1. 3 layer concepts
The usb peripheral devices should have 3 layers at least:
____________________

Upper level
____________________
USB Gadget driver
(This is hardware dependent layer.using calls to the Usb controller driver. It duty is listed as following:
1.Handing setup requests
2.Returning configurations and string descriptors
3.(re)setting configurations and interface altsettings,include enable and configuring endpoints
4.Handle life cycle events
5.Managing IN and OUT transfers on all currently enable endpoints)

____________________
USB Controller Driver(the linux/usb_gadget.h declare the functions, and these functions are defined in this layer,where the usb hardware is operated directly)
____________________
USB hardware (some soc has usb controller,such as PXA-25x, S3C244x)

An idea DVB_H USB adapter

2006-08-11T09:34:00.000+08:00

Now dibicom has dvbh SD interfaced adapter. I saw many times they demo using dibicom dvbh adapter and the Dell PDA.

For the digital TV for mobile devices is just at the beginning stage, so we've time to design some kind of peripheral devices.

Yes, that's it! That's an interesting project isn't it?
Yep! But still several key issues:
1. About the USB connection.
I am now using S3c2442,where the USB1.1 is supported. I have to learn the usb1.1 protocol.

2. About the driver
The usb gadget driver has already been supported by the linux kernel I'm using now. So I've to write a driver to finish transfer the ip package from dvb module to Host PC through USB interface.

3. The high level player
That's big issue. A we've to write some applications to do the device control and audio &video play.

linux dvbh driver

2006-08-11T09:26:00.000+08:00

Now There's no such dvbh driver,
Michael has written one