LinkSprite pcDuino V2 User manual

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pcDuino V2
Thank you for purchasing your Single-Board Computer from LinkSprite. Please read this user ’ s guide
before setting up and using your new Single-Board Computer.

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Contents
Board Overview.........................................................................3
System Features........................................................................4
Single-Board Computer Configuration.................................. .....5
Pin Assignments........................................................................7
Single-Board Computer Setup............................................ ......9
Required Hardware.......................................................... ......9
Optional Hardware........................................................... .....9
Adjusting Screen Settings......................................... ............9
The Ubuntu Operating System....................................... .........10
Accessing the Debug Port............................................ ............10
Re-Installing the Operating System........................... ...............11
Glossary................................................................... ..................12
FCC Information...................................................................... ...15

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Board Overview
You can use the Single-Board Computer with various open-source projects, but you can do much more.
The Single-Board Computer features a fully functional operating system (OS) that can simultaneously
run multiple processes, giving you a much more robust and versatile experience than a dedicated
microprocessor board.
The Single-Board Computer provides several ports so you can quickly and easily set up a monitor,
keyboard, and mouse to create a complete computing solution.
The HDMI port lets you connect to any HDTV or monitor with an HDMI port.
The USB A port lets you connect USB peripherals. For example, you can use a USB hub to connect a
keyboard, mouse, and other USB devices. The Micro USB port provides additional connectivity.
The MicroSD slot provides an easy way to add additional memory (up to 32 GB).
Note: Your Single-Board Computer is shipped in protective anti-static packaging. The board must not be
subjected to high electrostatic potentials. A grounding strap or similar protective device should be used
when handling the board.

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System Features
System on a Chip (SoC)
All Winner A10
Central Processor (CPU)
1 GHz ARMv7 Cortex A8 Single Core
Graphics Processor (GPU)
Mali 400
SDRAM Memory
1 GB, DDR3-800
Flash Memory
2 GB NAND
Mass Storage
Max
32 GB
Type
MicroSDHC
Video Output
HDMI Up to 720p, 60 Hz
Network Interface
Ethernet 10/100M via RJ45
Wireless Connectivity
802.11b/g/n
Communications I/O
USB 2.0
Extension Interfaces
ADC, UART, GPIO, PWM, I2C, SPI, Power
(via Stackable 0.100”Connection Headers)
Operating System
Ubuntu

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Single-Board Computer Configuration

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Pin Assignments
J8
1
GPIO8
2
GPIO9/PWM9
3
SPI_SS (Subordinate/Chip Select)/GPIO10/PWM10
4
SPI0_MOSI (Master Output, Subordinate Input)/GPIO11/PWM11
5
SPI0_MISO (Master Input, Subordinate Output)/GPIO12
6
SPI0_CLK (Clock)/GPIO13
7
GND
8
AREF
9
TWI2_SDA (Data)
10
TWI2_SCK (Clock)
J11
1
GPIO0/UART2 RX
2
GPIO1/UART2 TX
3
GPIO2
4
GPIO3/PWM3
5
GPIO4
6
GPIO5/PWM5
7
GPIO6/PWM6
8
GPIO7
P6
1
SPI1_MISO (Master Input, Subordinate Output)
2
+5 VDC
3
SPI1_CLK (Clock)
4
SPI1_MOSI (Master Output, Subordinate Input)
5
RESET
6
GND

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J9
1
(NC)
2
IOREF
3
RESET
4
3.3 VDC output
5
5 VDC output
6
GND
7
GND
8
+5VIN
J12
1
A0
2
A1
3
A2
4
A3
5
A4
6
A5
P10
1
GPIO14
2
GPIO15
3
GPIO16
4
GPIO17
P3
(Debug Port)
1
TX (Square Pad)
2
GND
3
RX

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Single-Board Computer Setup
Make USB and HDMI connections before connecting power to the Single-Board Computer. If the board
does not recognize your keyboard or mouse, unplug the device and plug it back in.
Note: To ensure that your Single-Board Computer boots properly, use a short, heavy-gauge USB cable
and a power supply that delivers at least 2 A.
Required Hardware Optional Hardware
•Monitor •MicroSD card for additional memory storage
•HDMI cable
•USB hub
•Keyboard/Mouse
•DC power (Micro USB)

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Adjusting Screen Settings
In some cases, the Ubuntu desktop may extend beyond the visible area of your monitor.
To adjust the size of your desktop:
1. Open LX Terminal.
2. At the command prompt, type: sudo setwindow 95 1 0 0
3. Press Enter.
Note: The “95”parameter sets the percentage of screen size, and the “1”activates auto-center; the
remaining values are inactive for auto-center, but are still necessary for the command.12

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The Ubuntu Operating System
Your Single-Board Computer is preloaded with the Ubuntu 12.07 operating system. Ubuntu is a robust,
fully functional operating system that provides an open-source productivity suite.
Terminal
•Run standard Linux commands
•Launch GCC to open the C/C++ compiler
File browser
•Built-in file manager
Internet browser
•Chromium web browser
•Support for HTML5
Productivity Suite
•Document Viewer for PDFs
•Gnumeric for spreadsheets
•AbiWord for documents.
If your system asks for an authentication password, the default password is “ubuntu.”
For full support go to www.ubuntu.com
Accessing the Debug Port
If you are a more experienced user, you can communicate with the Single-Board Computer directly by
using a USB-to-Logic Level Serial cable to connect the board’s debug port to your computer’s USB drive.
1. Go to the Single-Board Computer website and install the drivers onto your PC.
2. Connect the debug cable to the USB port on your computer and to the board’s debug port (P3). TX
connects to Pin 1, which has the square pad.
3. On your PC, locate the COM port. For help locating the COM port, refer to your operating system’s
online help.
4. After you locate the COM port, access the serial communications package. Verify the following
settings:
•COM Port: 8,N,1

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•Baud Rate (Speed): 115200
•All Flow Controls: Off
5. You can now access the board’s system level.
Re-Installing the Operating System
As you consider new projects, you may decide to restore your Single-Board Computer to its original state.
To accomplish this, you may need to re-install the operating system.
Note: Re-installing the Ubuntu operating system will erase all saved data from the Single-Board
Computer.
To install the operating system:
1. Disconnect the power to the Single-Board Computer.
2. Insert a MicroSD card that contains a Linux kernel image into the Single-Board Computer’s MicroSD
card slot.
3. Restore power to the board and wait at least 2 minutes. During this time, the TX light blinks as the
Single-Board Computer installs the Linux kernel.
4. When TX stops blinking, disconnect the power to the Single-Board Computer and remove the kernel
image MicroSD card.
Note: The Single-Board Computer will always check for a kernel image when power is restored. Do not
insert the kernel image SD card in the slot unless you intend to install the entire operating system and
erase all data on the board.
5. Restore power to the board. The RX and TX lights will remain lit for a moment, and then the TX light
will begin to blink slowly while the RX light remains lit.

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6. Insert a MicroSD card that contains an Ubuntu image. The TX light will begin to blink rapidly. Do NOT
remove the Ubuntu image MicroSD card during this process. After the TX light stops flashing rapidly,
both the RX and TX lights will blink slowly. This indicates a good image load.
7. Disconnect power to the Single-Board Computer and then remove the Ubuntu image MicroSD card.
8. Restore power to the Single-Board Computer. The operating system will boot up properly, the desktop
will appear on your monitor, and the board will be ready to use.
Glossary
ADC
Analog-digital converter
CPU
Central processing unit
DDR
Double Data Rate, Type 3. SDRAM configuration with high
bandwidth
ESD
Electrostatic discharge
Linux
An open source operating system
GB
Gigabyte. Capacity in bytes. 1×109 Bytes
GHz
Gigahertz. Frequency in hertz. 1×109 hertz
GPIO
General purpose input/output. A digital port that can be selected
by the user to function as either an input or an output.
GPU
Graphics processing unit
HDMI
High-Definition Multimedia Interface
I2C
Inter-Integrated Circuit, generically referred to as “two-wire
interface”(TWI)
I/O
Input/Output

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MB
Megabyte. Capacity in bytes. 1×106 bytes
Flash NAND Memory
Electronic non-volatile computer storage that can be electrically
erased and reprogrammed. NAND-type flash memory may be
written and read in blocks (or pages).
PC
Personal computer
PWM
Pulse-width modulation
RoHS
Restriction of Hazardous Substances Directive (EU)
SDHC
Secure Digital High-Capacity memory card
SDRAM
Synchronous dynamic random access memory
SoC
System on a chip
SPI
Serial Peripheral Interface
Ubuntu
An open source operating system
UART
Universal Asynchronous Receiver/Transmitter. A serial
communication port.
USB
Universal Serial Bus
VDC
Volts of direct current

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FCC Information
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult your local RadioShack store or an experienced radio/TV technician for help.
If you cannot eliminate the interference, the FCC requires that you stop using your product. Changes or modifications not expressly approved by
RadioShack may cause interference and void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful
interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.