Titan USB-2COM-BB Manual de usuario
Model : USB-2COM-BB
BeagleBone Black Expansion I/O
Cape User Guide
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
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Content
Introduction & Features of USB-2COM-BB ............................................ 2
Introduction of USB-2COM-BB................................................................................ 2
Features of USB-2COM-BB...................................................................................... 2
System Requirements............................................................................................. 3
Picture of USB-2COM-BB ...................................................................... 3
Diagram of USB-2COM-BB .................................................................... 4
Dimension of USB-2COM-BB................................................................. 4
Specification......................................................................................... 5
USB port (CN1, CN2) pin-out ................................................................. 6
Serial port (DB9 Male connector) pin-out.............................................. 7
Installation ........................................................................................... 8
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
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Introduction & Features of USB-2COM-BB
Introduction of USB-2COM-BB
The USB-2COM-BB is a plug-in RS-232 cape designed for the developers and users of BeagleBone
and BeagleBone Black. The USB-2COM-BB BeagleBone RS-232 cape provides two high-speed
RS-232 serial interfaces, two high-efficient USB 2.0 ports and one Micro SD card reader. The two
RS-232 ports are located to the side of the cape with two 90-degree 10-pin connectors. Two IDC
flat ribbon cables with D-Sub 9-pin male serial connectors are provided with the cape to connect
the two 10-pin serial connectors. The flat ribbon cable provides the convenience for extended
connection of serial devices. This dual RS-232 cape is designed to allow any other capes to be
stacked above it without interference mechanically. When there is a need to add four serial ports,
user can just stack two USB-2COM-BB modules over BeagleBone and BeagleBone Black.
When the USB-2COM-BB plugged to the USB port of BeagleBone or BeagleBone Black, the two
serial ports, two USB ports and the Micro SD card reader are automatically detected and installed.
The USB-2COM-BB board is designed with GL852G USB2.0 MTT Hub controller to expand the
single USB port on BeagleBone Black and BeagleBone to two USB 2.0 ports for USB connection.
The USB-2COM-BB cape is a high-speed dual RS-232 ports/ dual USB ports /Micro SD reader cape
that provides to BeagleBone Black and BeagleBone’s developers a cost-economical expansion I/O
module to add two serial ports, two USB ports and one MicroSD card reader for their
development.
Features of USB-2COM-BB
Fully compatible with BeagleBone Black or BeagleBone platform
Adds two high speed RS-232 serial ports via USB connection
Each serial port provided 384 bytes receive buffer and 128 bytes transmit buffer for high
speed data throughput
Each serial port communication data rates up to 1 Mbps.
Connector: two DB9 Male connectors via IDC flat ribbon cable
RS-232 data signals: DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI
Two downstream USB 2.0 ports with over-current detection and protection
Each downstream USB port supports 5V 500 mA power for external high power USB
devices
Individual port power management
Supports USB 1.1 and USB 2.0 transfer speeds from 1.5 Mbps to 480 Mbps, automatic
link and speed detection
Plug-and-Play; no software or drivers required
Supports SD specification v1.0 / v1.1 / v2.0 / SDHC, up to 32GB
Compatible with SDXC, Up to 2TB
Micro SD card reader with 480 Mbps USB 2.0 transfer speed
CE, FCC approval
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
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System Requirements
BeagleBone Black or BeagleBone platform
Picture of USB-2COM-BB
USB-2COM-BB (without Micro SD Card Reader)
USB-2COM-BB (with Micro SD Card Reader）
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
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Diagram of USB-2COM-BB
Dimension of USB-2COM-BB
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
5
Specification
USB 2.0 Port
Ports
Downstream
2
Upstream
1
Power Mode
Self Power Mode
Output Voltage (per port)
+5V DC
Output Current (per port)
500 mA (max)
Micro SD Card Reader
Speed
480 Mbps USB 2.0 transfer speed
Support Memory Card
Micro SD/ SDHC/ SDXC
Serial Port
Serial Ports
Two RS-232 ports
RS-232 Signals
DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS , RI
Maximum Bit rates
921,600 bps
Serial Configuration
Data bits : 7,8
Parity : None, Odd, Even, Mark , Space
Stop bits : 1, 2
UART FIFO Buffer Size
Each port with 128 Bytes FIFO for transmit
and 384 bytes FIFO for receive.
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
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Mechanical
Housing
Board only
Weight
52 g
Dimensions
80 mm X 55 mm X 20 mm (L x W x H)
Environmental
Operating Temperature
0 °C to 70°C
Storage Temperature
-40 °C to 85°C
Humidity
0 to 90% RH. Noncondensing
Safety Approvals
CE, FCC
USB port (CN1, CN2) pin-out
Pin Number
Name
Description
Pin1
VBUS
Provides +5Vdc 500 mA (max) output power
Pin2
D-
USB data-
Pin3
D+
USB data+
Pin4
GND
Ground
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
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Serial port (DB9 Male connector) pin-out
Pin Number
Name
Description
Pin1
DCD
Input : Data Carrier Detect
Pin2
RxD
Input : Receive Data
Pin3
TxD
Output : Transmit Data
Pin4
DTR
Output : Data Terminal Ready
Pin5
GND
Ground : Signal Ground
Pin6
DSR
Input : Data Set Ready
Pin7
RTS
Output : Request To Send
Pin8
CTS
Input : Clear To Send
Pin9
RI
Input : Ring Indicator
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
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Installation
The hardware installation of USB-2COM-BB expansion I/O cape is easy to carry out. Follow the
detailed steps given below to install the USB-2COM-BB expansion I/O cape in BeagleBone Black or
BeagleBone platform.
Step 1: Turn your BeagleBone Black or BeagleBone platform’s power off, and also shut off the
power to any peripheral devices.
Step 2: Fasten four copper tubes, with four nuts, on the BeagleBone Black or BeagleBone
platform.
Step 3: Insert the USB-2COM-BB expansion I/O cape into the BeagleBone Black or BeagleBone
platform’s interface slot.
Step 4: Fasten the holding screws to fix the USB-2COM-BB expansion I/O module in place.
After installing the USB-2COM-BB expansion I/O cape in BeagleBone Black or BeagleBone platform
successfully, please follow the steps below to confirm the Linux driver of USB-2COM-BB is installed
automatically.
BeagleBone Black
1. Connect the USB cable of USB-2COM-BB to the A-type USB connector of BeagleBone Black.
2. Insert your Micro SD memory card into the Micro SD reader slot on USB-2COM-BB expansion
I/O cape.
3. Connect AC to DC 5V power adapter to BeagleBone Black platform. The blue power LED will
light when BeagleBone Black platform is receiving power.
4. After the Angstrom Linux screen boots up, connect the USB mouse and USB keyboard to the
two USB ports on the USB-2COM-BB expansion I/O cape. You can use USB mouse to control
the cursor under the Angstrom Linux screen.
5. You will find a new disk device under the Angstrom Linux screen when you insert a Micro SD
memory card into the Micro SD card reader slot on USB-2COM-BB expansion I/O cape.
6. Open a “Terminal” program, under Applications of the Angstrom Linux screen, to check USB
keyboard and the two serial ports. Go there by select “Applications” –“System Tools”-
“Terminal”.
USB-2COM-BB Dual RS-232/USB/Micro SD Cape for BeagleBone Black & BeagleBone
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7. Use a USB keyboard to key-in the command under “Terminal”program to find the available
serial ports. Most likely, the Angstrom Linux will support two serial ports of USB-2COM-BB with
ttyUSB0 and ttyUSB1:
Key-in the following commands to check the two serial ports
# stty –F /dev/ttyUSB0
# stty –F /dev/ttyUSB1
If two serial ports of USB-2COM-BB are available, the response is similar to
Speed 9600 baud; line = 0;
-brkint –imaxbel
BeagleBone
1. Connect the USB cable of BeagleBone to a computer with Windows O.S. Make sure your
computer has Internet connection.
In Windows 8, 7, Server 2008 R2 O.S system, your system will load and install the drivers for
BeagleBone automatically.
In Windows Vista, XP, Server 2003 and 2008 O.S system, when asked to install drivers please
allow Windows to search the Internet. Wait, and the system will load and install the drivers
automatically.
2. You will find a console port “USB Serial Port (COMx) ” under Device Manager of the System
Properties screen. Go there by Start- Setting-Control Panel- System Properties –Hardware -
Device- Device Manager.
3. Use a “Terminal Emulator” program to open this console port with 115,200 bps baud rate, 8
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