View source for BeagleBone Black RFID Adaptor Cape

[[File:RFID Cape.jpg|right|350px|BeagleBone Pin Usage]]

The RFID adaptor cape is an interface between the Beaglebone Black (BBB) and Texas Instrument's TRF7970ATB, (Multi-Protocol Fully Integrated 13.56-MHz RFID and NFC Transceiver). <br />

Our applications of the RFID Adaptor Cape are Cape2Login and Cape2Shop. <br />
-- '''Cape2Login''': Allows you to login your computer without a password using RFID tagged badge. <br />
-- '''Cape2Shop''': Eliminate checkout lanes and personalize shopping using this handheld device which scans RFID tagged items and catalogues your purchases. 

'''Features of the RFID Adaptor Cape:'''
* Fully functional RFID and NFC capabilities on the BBB
* Three status LEDs, one power LED, Push button
* Communication via SPI
* Compatible with TRF7960/A and TRF7970/A Target Board (TB)
* TB supports ISO15693, ISO18000-3, ISO14443A/B, and FeliCa

'''Source code available to demo:'''
* Item identification
* Live video stream to PC initiated with RFID

== Videos/Demonstration ==
{{#evp:youtube|f3jv0FzXaXM| Promo Video |left|500}}

{{#evp:youtube|Ywk79DdCk2w| Cape2Login: Login to your computer without a password using your RFID tagged badge ~ Cape2Shop: Eliminate checkout lanes and personalize shopping with RFID tagged items |center|500}}

{{#evp:youtube|WD-8vUvm6Sc| Examples of demonstrations include Identification and Video Streaming . For Video Streaming source code, check out [https://github.com/shengzhao91/RFID_Adaptor_Cape/tree/master/RFID_VideoStreaming here] |right|500}}
<br />

== Schematic ==
[[File:RFID Cape Schematic.png|300px|RFID Adaptor Cape Schematic]]
[[File:RFID Cape Layout.png|300px|RFID Adaptor Cape Layout]]
[[File:Cape_Pin_Usage.jpg|300px|BeagleBone Pin Usage]]
<br/><br/>
== Sample Code ==
Source code: [https://github.com/shengzhao91/RFID_Adaptor_Cape/tree/master/RFID_Application RFID Application] on GitHub. <br />
This C application will constantly scan for RFID tags within the vicinity of the reader. Once a tag is detected, its UID will be stored in uid.txt file.

== SPI Device Tree Overlay Setup==
Since SPI pins are not automatically enabled on BBB, a device tree overlay is used to configure the pins properly for SPI use.

The following information is slightly modified from [http://elinux.org/BeagleBone_Black_Enable_SPIDEV BeagleBone Black Enable SPIDEV] to suit for the cape.

'''NOTE:''' You MUST disable the HDMI interface to use SPI1 to talk to the adaptor cape.
<br>
Create a file called [https://github.com/shengzhao91/RFID_Adaptor_Cape/blob/master/SPI_devicetree/BB-SPI1-01-00A0.dts BB-SPI1-01-00A0.dts]
Compile the dtc:
 dtc -O dtb -o BB-SPI1-01-00A0.dtbo -b 0 -@ BB-SPI1-01-00A0.dts

Then, copy the file into /lib/firmware/:
 cp BB-SPI1-01-00A0.dtbo /lib/firmware/

Then enable the device tree overlay:
 echo BB-SPI1-01 > /sys/devices/bone_capemgr.*/slots

Plug in your BBB to a host computer using the mini usb data cable.

Go to My Computer>BeagleBone Getting Started> and open uEnv.txt
Copy and paste this command into the .txt file. Make sure to save your changes.
(Ctrl+s)

<pre>
optargs=quiet drm.debug=7 capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
capemgr.enable_partno=BB-SPI1-01
</pre>
Save the changes, reboot Beaglebone Black.
<br>
Make sure it is enabled
You should now have two spidev-files in the folder /dev/
<pre>
ls -al /dev/spidev1.0
</pre>

If you don't see it, you can type the following to manually enable the device tree overlay.
 echo BB-SPI1-01 > /sys/devices/bone_capemgr.*/slots

== Eagle Files ==
[https://github.com/shengzhao91/RFID_Adaptor_Cape/blob/master/BBB_Rev2/BBB_Cape.sch Eagle Schematic] <br />
[https://github.com/shengzhao91/RFID_Adaptor_Cape/blob/master/BBB_Rev2/BBB_Cape.brd Eagle Board Layout] <br />
[https://github.com/shengzhao91/RFID_Adaptor_Cape/tree/master/BBB_Rev2 Gerber Files]

== Team - About Us ==
Members: Sheng Zhao, Amulya Kattimani, Edwin Flores <br />
[[Image:RFIDcapeGroupPicture.jpg|350px|Group Picture. Starting from left Sheng Zhao, Amulya Kattimani, Edwin Flores]]
* [http://www.linkedin.com/pub/edwin-flores/41/6b8/76b Edwin Flores]
* [http://www.linkedin.com/pub/amulya-kattimani/54/b75/466 Amulya Kattimani]
* [http://www.linkedin.com/in/shengzhao91 Sheng Zhao]

== References ==
* [http://elinux.org/BeagleBone_Black_Enable_SPIDEV BeagleBone Black Enable SPIDEV]
* [https://github.com/derekmolloy/boneDeviceTree/tree/master/spi Derek Molloy's Device Tree]
* [https://raw.github.com/torvalds/linux/master/Documentation/spi/spidev_test.c Sample SPI C code (spidev-test.c)]