#Datalogic Barcode Scanner

This article illustrates how to use an USB Barcode Scanner with the FOX Board G20

<img src="./datalogic_gd4130.jpg">

For this article we used a 
<a href="http://www.scanning.datalogic.com/sitefiles/gryphoni.aspx">Datalogic Gryphon GD4130</a> 
general purpose corded handheld linear imager bar code reader but probably 
it will also work with other models from Datalogic or Symbol.

When plugged on the FOX Board G20 USB host port the USB 
driver will detect it showing these messages:

<pre class="minicom">
usb 1-2: new full speed USB device using at91_ohci and 
address 2                                                          
usb 1-2: New USB device found, idVendor=05f9, idProduct=2206                                                                        
usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3                                                                   
usb 1-2: Product: Handheld Barcode Scanner                                                                                          
usb 1-2: Manufacturer: Datalogic Scanning, Inc.                                                                                     
usb 1-2: SerialNumber: S/N E09M05215                                                                                                
usb 1-2: configuration #1 chosen from 1 choice                                                                                      
input: Datalogic Scanning, Inc. Handheld Barcode Scanner as 
/devices/platform/at91_ohci/usb1/1-2/1-2:1.0/input/input1               
generic-usb 0003:05F9:2206.0001: input,hidraw0: USB HID v1.10 Keyboard 
[Datalogic Scanning, Inc. Handheld Barcode Scanner] on usb-a0
</pre>

The USB HID is associated to this driver and a <b>/dev/input/eventx</b> 
interface will appear.

Using this interface it is possible to read the barcode content read 
by the scanner using the following example code.

## Example in C

This is a working example written by Andy Stewart I found on this mailing list 
<a href="http://www.mail-archive.com/linux-usb-devel@lists.sourceforge.net/msg54578.html">
http://www.mail-archive.com/linux-usb-devel@lists.sourceforge.net/msg54578.html</a>

Code example: @pg='c/bar.c'


It is possible to download the this code with a single git command following this
article: @article='playground'.

The move into the examples directory and compile it using the in-board GNU C compiler:

<pre class="minicom">
debarm:~# cd playground
debarm:~# cd c
debarm:~# gcc bar.c -o bar
...
</pre>

Now launch the example program:

<pre class="minicom">
debarm:~# ./bar
Go ahead and scan something - press ctrl_C when finished.                                                                         
Look for printouts which say: Input from Scanner  
Ignore other printouts                                                                                                            
Input from Scanner: "FOXBOARDG20"
</pre>

and try to read any barcode you found. It also reads the barcode on video, 
try on the fly reading this barcode:

<img src="./barcode.png">

or using this free on-line barcode generators linked below.

## Related links

*  <a href="http://www.barcodesinc.com/generator/index.php">Free on-line barcode generatorby BarcodesInc</a>
*  <a href="http://www.morovia.com/free-online-barcode-generator/">Free on-line barcode generator by Morovia</a>
*  <a href="http://www.mail-archive.com/linux-usb-devel@lists.sourceforge.net/msg54578.html">Symbol Barcode Scanner Reader Software written by Andy Stewart</a>
*  <a href="http://www.kernel.org/doc/Documentation/input/input.txt">Linux Kernel input driver documentation</a>