![\includegraphics[bb=0bp 0bp 829bp 500bp,scale=0.6]{LMLBT44Exp}](img1.png)
Linux Media Labs
2010-12-07
The LMLBT4x board is a multi-channel PCI board based on the BT878 chip. These are the general LMLBT4x board's features:
You input is designated with $, for the command shell input prompt, and with # for superuser mode input. Your input and system response are presented in bold face. Filenames and URLs are underlined. System commands (line uname -r) are using San Serif font.
Open computer case. Install LMLBTx card into available PCI slot.
Video inputs on the main board are numbered IN1, IN2, IN2, IN4 counting from top. The video inputs on the expansion board are labeled in the same fashion. Connection of the Expansion Cable is simple. It must be connected to the main card to PINS labeled P7 with PIN 1 ( Red Cable ) UP. On the expansion card, the cable must also be connected with PIN 1 ( Red Cable ) UP.
The Video Inputs on the back of the LMLBT44 Card, LMLBT4M Card and the Expansion Slot for the LMLBT44 are labeled from Top to bottom. NOTE: Channels in xawtv do not reflect the numbers etched on the back of either the LMLBT44card or its expansion slot. Instead, xawtv labels the channels from the bottom, in reverse to the etched numbers. However, if you have the LMLBT4M card, the numbers on the back of the card are the same as the xawtv channels (Composite0,1,2 and 3) : with Composite0 being the same as IN1 on the back of the card.
![\includegraphics[scale=0.7]{LMLBT44conn}](img2.png)
Pin assignments on a 15-ping sensor/alarm IO connector are as follows:
| Pin | Name | Comment
1 |
Sensor's GND1,2,3,4 are all connected together and to PCI bus ground. Sensor inputs (IN1,2,3,4) are optically decoupled. Sensor produces signal, when input and ground are connected with less then 100 Ohm resistance, i.e. some kind of a switch is required.
Relay outputs are all floating, there is no connection to ground on either COM or NO side.
You may load the bttv driver after each reboot manually, or modify the/etc/modules and /etc/modprobe.d/bttv to let this happen automatically.
Make sure to install driver when no X11 is running, or restart X11 after inserting the driver. Otherwise V4L X11 module caches video card settings, preventing kernel driver from using LML patches provided features.
There is no need to patch the 2.6 series kenels, unless you want to take advantage of LMLBT44 sensor/alarm I/O capabilities. If you want to take advantage of sensor/alarm I/O follow the procdure in the patch file.
To manually load the driver:
$ sudo /sbin/modprobe bttv card=118 pll=1
or for LMLBT44:
$ sudo /sbin/modprobe bttv card=118,118,118,118
pll=1,1,1,1
In order to load bttv.o module automatically you need to do the following:
Append the following line to file /etc/modules for LMLBT4M
and LMLBT44:
bttv
Create /etc/modprobe.d/bttv.conf with this line for LMLBT4M:
options bttv card=118 pll=1
and for LMLBT44:
options bttv card=118,118,118,118 pll=1,1,1,1
run depmod to update system configuration:
# depmod -a
now, you should be able to autoload the driver when a program requests
it.
Xawtv software allows you to test LMLBT44 card operation at rather low level.
Under Ubuntu:
sudo apt-get install xawtv
Under Fedora:
sudo yum install xawtv
You should create configuration presets and defaults for xawtv, by the way of editing ~/.xawtv file. This file is not created automatically during the installation process. You will need to create it in the home directory of the user(s) that will be using the application.
This is an example of the ~/.xawtvfile (for EU, PAL):
[global]
[Camera1]
norm = PAL
input = Composite0
key = 1
[Camera2]
norm = PAL
input = Composite1
key = 2
LMLBT44 has 4 independent video capture engines, that are represented as 4 separate devices:
/dev/video0
/dev/video1
/dev/video2
/dev/video3
in order to connect to a certain device use this command line xawtv invocation (this is 2nd input, counting from card top):
xawtv -c /dev/video1
this brings the video application windows, right clicking on it brings congifucation menu, left clicking allows to select video input (such as Camera1 or Camera2 for the configuration in section 6.3 above). In order to use different capture device you need to restart xawtv with differenct -c option (i.e. xawtv -c /dev/video0)
Although it's an excellent package, installing it may be rather tricky. Therefore we're providing Ubuntu LiveCD with Zoneminder and LMLBT4x kernel patches for alarms/sensors inputs pre-installed. In order to use that ZM-LiveCD you need to make sure your computer boot sequence is set (in BIOS settings) to boot from the CD if it is inserted. After that, rebooting the system with ZM-LiveCD would bring you to the ZoneMinder control interface with all LMLBT44 or LMLBT4M channel(s) operational.
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The translation was initiated by Vassili Leonov on 2010-12-07