Hi ALL, We are student of IIT Delhi. We are trying to build a usb webcam application and ext2 file system driver on L4. We have seen an *application USBHID directory* under L4/pkg downloaded from svn . Could anybody let us know how to use this application. Please also let us know the required menu.lst file to use this application .
1) Please also describe required menu.lst file to use dde, dde_linux26, dope, drop,loader together . 2) Could any body tell us what is the difference between dde and dde_linux26 application found in svn ? 3) Please also tell us how to use these to build an usb device driver.
Thanks & Regards, TAPAS KUMAR KUNDU
Hi ALL, We are student of IIT Delhi. We are trying to build a usb webcam application and ext2 file system driver on L4. We have seen an *application USBHID directory* under L4/pkg downloaded from svn . Could anybody let us know how to use this application. Please also let us know the required menu.lst file to use this application .
1) Please also describe required menu.lst file to use dde, dde_linux26, dope, drop,loader together . 2) Could any body tell us what is the difference between dde and dde_linux26 application found in svn ? 3) Please also tell us how to use these to build an usb device driver.
Thanks & Regards, TAPAS KUMAR KUNDU
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Hello,
again, there is no need to double post.
We are student of IIT Delhi. We are trying to build a usbwebcam application and ext2 file system driver on L4. We have seen an *application USBHID directory* under L4/pkg downloaded from svn . Could anybody let us know how to use this application. Please also let us know the required menu.lst file to use this application .
1) Please also describe required menu.lst file to use dde,dde_linux26, dope, drop,loader together .
You may find our Wiki at http://wiki.tudos.org/Main_Page a useful resource for some initial reading.
2) Could any body tell us what is the difference between ddeand dde_linux26 application found in svn ?
dde_linux26 (combined with linux-26-headers) is the older version which is deprecated by the re-implementation found in the dde package. However, the L4IDE disk driver you might be interested in, relies on this old version.
3) Please also tell us how to use these to build an usb devicedriver.
Depending on what you are trying to learn, you can either 1) build a Linux USB driver, link it against the DDE/Linux libraries and run it on L4, or 2) build a L4Env device driver based on DDEKit (l4/pkg/dde/ddekit). The interface is slightly different, but if you know how to do things in Linux, you'll quickly find that it is basically the same way using DDEKit.
Cheers, Bjoern
Hi
http://wiki.tudos.org/DDE/DDEKit
I have gone through above url and found following information about DDE . I have found libdde_linux26,libdde_linux26_net,libdde_linux26_block,libdde_linux26_sound in /user-build/lib/x86_586/l4v2 directory after building all the modules. But I have not found libdde_linux26_usb in any directory. I need to work on usb webcam driver. I have used svn version 446. and run following commands to build:
./repomgr co all make O=/home/tapas/user-build
Please let us know where can I found libdde_linux26_usb library. It will help me a lot to build driver for usb webcam. I dont want to port linux usb driver in L4. I want to port/build a linux usb webcam driver only. Please suggest me what to do.
Thanks & regards Tapas Kumar kundu
"DDE/Linux2.6 is an environment for Linux 2.6 device drivers on L4. Basically, it is a set of libraries implementing interfaces to certain subsystems of the Linux kernel, so that the programmer may chose which parts of the kernel are needed for reusing a special device driver (e.g., network drivers don't need block layer functionality). Currently, the following subsystems are available:
* Core (libdde_linux26) provides functions that are essential to (nearly) all drivers. This includes for instance memory management, I/O resource management, workqueues, softirqs, and timers. * Net (libdde_linux26_net) provides network-related functions such as management of socket buffers. * Block (libdde_linux26_block) provides functions related to the Linux block layer such as a file system buffer abstraction, I/O schedulers, block I/O descriptors (BIOs). * USB (libdde_linux26_usb) implements USB-related functions which enable drivers to use the Linux USB core as well as USB host controllers. This is work in progress. * Sound (libdde_linux26_sound) includes the Linux sound core which is the base for implementing sound subsystems such as OSS and Alsa. This is work in progress.
Work USB and Sound support libraries is ongoing. "
2009/4/5 Björn Döbel doebel@os.inf.tu-dresden.de:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Hello,
again, there is no need to double post.
We are student of IIT Delhi. We are trying to build a usbwebcam application and ext2 file system driver on L4. We have seen an *application USBHID directory* under L4/pkg downloaded from svn . Could anybody let us know how to use this application. Please also let us know the required menu.lst file to use this application .
1) Please also describe required menu.lst file to use dde,dde_linux26, dope, drop,loader together .
You may find our Wiki at http://wiki.tudos.org/Main_Page a useful resource for some initial reading.
2) Could any body tell us what is the difference between ddeand dde_linux26 application found in svn ?
dde_linux26 (combined with linux-26-headers) is the older version which is deprecated by the re-implementation found in the dde package. However, the L4IDE disk driver you might be interested in, relies on this old version.
3) Please also tell us how to use these to build an usb
device
driver.
Depending on what you are trying to learn, you can either
- build a Linux USB driver, link it against the DDE/Linux libraries and
run it on L4, or 2) build a L4Env device driver based on DDEKit (l4/pkg/dde/ddekit). The interface is slightly different, but if you know how to do things in Linux, you'll quickly find that it is basically the same way using DDEKit.
Cheers, Bjoern -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iEYEARECAAYFAknYzpoACgkQP5ijxgQLUNn8ywCgigoFYJV4Hi6vq3pZ3EjU3KZy 0zoAoJyC1jJdmVibtwwp4glMTcwVXVeS =coST -----END PGP SIGNATURE-----
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Hello,
http://wiki.tudos.org/DDE/DDEKit [..] Please let us know where can I found libdde_linux26_usb library. It will help me a lot to build driver for usb webcam. I dont want to port linux usb driver in L4. I want to port/build a linux usb webcam driver only. Please suggest me what to do.
As the link above says and as I already said: USB support is work in progress. I expect a release of our USB host controller server soon, we will inform you on the mailing list, when this happens.
In the meanwhile, you may have a look at
1) The DDEKit library in l4/pkg/dde/ddekit -- this is meant to be a suitable interface for writing device drivers in general. 2) Dirk Vogt's thesis on USB for L4, which can be found at http://os.inf.tu-dresden.de/papers_ps/vogt-beleg.pdf It describes the interface the HC server and accompanying libraries will have.
Cheers, Bjoern
l4-hackers@os.inf.tu-dresden.de
-
Björn Döbel -
tapas kundu