Glomation GESBC-9G20i User manual

Glomation
Embedded Single Board Computer
GESBC-9G20i
User’s Manual

GESBC-9G20i User’s Manual
Version 0.2 Page 2 of 21 20-Sep-13
Table of Contents
Chapter 1 – Introducing the GESBC-9G20i Single Board Computer............................................... 4
GESBC-9G20i Overview............................................................................................................... 4
Advanced Features......................................................................................................................... 4
AT91SAM9G20............................................................................................................................. 5
SDRAM ......................................................................................................................................... 5
FLASH........................................................................................................................................... 5
USB................................................................................................................................................ 5
UART 1.......................................................................................................................................... 5
UART 2.......................................................................................................................................... 6
DEBUG Port.................................................................................................................................. 6
Ethernet.......................................................................................................................................... 6
Chapter 2 – Getting Started................................................................................................................ 7
Assembly and Connections............................................................................................................ 7
Operation........................................................................................................................................ 7
Chapter 3 – GESBC-9G20i Function Blocks .................................................................................. 10
AT91SAM9G20........................................................................................................................... 10
SDRAM ....................................................................................................................................... 10
FLASH......................................................................................................................................... 10
RS-232 Port 0, 1, and 2................................................................................................................ 10
RS-485 ......................................................................................................................................... 11
I2C Bus ........................................................................................................................................ 11
Ethernet........................................................................................................................................ 12
USB Port...................................................................................................................................... 12
I/O Block...................................................................................................................................... 12
4 x 20 Character LCD Port J30.................................................................................................... 13
RTC.............................................................................................................................................. 13
Optional A/D................................................................................................................................ 14
JTAG............................................................................................................................................ 14
Power Requirement...................................................................................................................... 15
Chapter 4 – Software Description.................................................................................................... 16
Overview...................................................................................................................................... 16
Data Storage on GESBC-9G20i................................................................................................... 16
GESBC-9G20i Linux Code ......................................................................................................... 16
U-boot.......................................................................................................................................... 16
U-boot Booting Linux.................................................................................................................. 16
Loading Linux Kernel and root File System................................................................................ 17
Chapter 5 – Development Tools...................................................................................................... 19
Overview...................................................................................................................................... 19
Linux Development Tool Chain .................................................................................................. 19
Chapter 6 – Troubleshooting ........................................................................................................... 21

GESBC-9G20i User’s Manual
Version 0.2 Page 3 of 21 20-Sep-13
List of Tables
Table 1 UART Port P0 Connector on GESBC-9G20i..................................................................... 11
Table 2 UART Port P1 Connector................................................................................................... 11
Table 3 J9 I2C bus .......................................................................................................................... 11
Table 4 J8 I/O Expansion................................................................................................................. 12
Table 5 J30 LCD.............................................................................................................................. 13
Table 6 J12 Optional A/D................................................................................................................ 14
Table 7 J20 JTAG Connector .......................................................................................................... 14
Table 8 J1 Power Supply Connector................................................................................................ 15
Table 9 NAND FLASH Storage Map.............................................................................................. 16

GESBC-9G20i User’s Manual
Version 0.2 Page 4 of 21 20-Sep-13
Chapter 1 – Introducing the GESBC-9G20i Single Board
Computer
GESBC-9G20i Overview
The GESBC-9G20i is a low cost compact sized single board computer based on Atmel
AT91SAM9G20 processor. With a large peripheral set targeted to a variety of applications, the
GESBC-9G20i is well suited for industrial controls, digital media servers, audio jukeboxes, thin
clients, set-top boxes, point-of-sale terminals, biometric security systems, and GPS devices.
Advanced Features
The heart of the GESBC-9G20i is the AT91SAM9G20 which is the one in a series of ARM926EJ-
S-based processors. The AT91SAM9G20 microcontroller features DSP Instruction Extensions,
ARM Jazelle® Technology for Java® Acceleration. It has separate 32 Kbyte instruction and data
caches with write buffer. The ARM926EJ-S on the AT91SAM9G20 functions with a maximum
operating clock rate of 400MHz and a power usage between 20mW and 80mW (dependent upon
clock speed). The ARM core operates from a 1V supply while the I/O operates at 3.3V. The low
power consumption makes it an idea platform for battery operated applications.
The list below summarizes the features of the GESBC-9G20i.
•400MHz Processor Core – ARM926EJ-S with MMU
•32~ 64 MB SDRAM
•128MB ~ 1GB NAND FLASH
•1 10/100 Mbps Ethernet port
•4 channel 10-bit Analog-to-Digital Converter (ADC
•3 RS-232 Universal Asynchronous Receiver / Transmitters (UARTs)
•1 RS-485 Port
•2 USB Host Port
•1 USB Device Port
•Real-Time Clock with battery backup
•Hardware Debug Interface
•SD/MMC Socket
•1 I2C Port
•1 SPI Port
Figure 1 below shows a picture of the GESBC-9G20i Single Board Computer.

GESBC-9G20i User’s Manual
Version 0.2 Page 5 of 21 20-Sep-13
Figure 1. GESBC-9G20i Single Board Computer
AT91SAM9G20
The GESBC-9G20i is shipped with the Atmel AT91SAM9G20 processor. For more information
regarding the AT91SAM9G20 processor please see the AT91SAM9G20 datasheet.
SDRAM
The GESBC-9G20i is shipped with 32MBytes of SDRAM.
FLASH
The GESBC-9G20i is shipped with 128MB NAND FLASH.
USB
The GESBC-9G20i is shipped with two USB host ports.
UART 1
The GESBC-9G20i is shipped with a RS-232 interface with RTS and CTS hardware flow control
signals

GESBC-9G20i User’s Manual
Version 0.2 Page 6 of 21 20-Sep-13
UART 2
The GESBC-9G20i is shipped with the 3 wire UART 2 interface.
DEBUG Port
The GESBC-9G20i is shipped with the 3 wire serial debug port.
Ethernet
The GESBC-9G20i is shipped with a complete physical and MAC subsystem that is compliant
with the ISO/TEC 802.3 topology for a single shared medium with several stations. The
AT91SAM9G20 supports 1/10/100 Mbps transfer rates and interfaces to industry standard physical
layer devices.

GESBC-9G20i User’s Manual
Version 0.2 Page 7 of 21 20-Sep-13
Chapter 2 – Getting Started
This chapter describes the GESBC-9G20i working environment and familiarizes the user with its
components and functionality. This chapter contains the following sections:
•Assembly and Connections
oDescribes how to assemble and connect components to the GESBC-9G20i Single
Board Computer
•Operation
oDescribes how to operate the GESBC-9G20i Single Board Computer
Assembly and Connections
In order to use the GESBC-9G20i the user must first assemble and connect the peripherals to the
GESBC-9G20i, as described in the following procedure.
1. Place the GESBC-9G20i on a static free surface.
2. Make sure all of the jumpers are in the factory default position. The unit is shipped in a
factory default configuration. If the user is uncertain that the GESBC-9G20i has the
jumpers in the factory default configuration, please see the next section regarding board
configuration.
3. Connect 7.5 ~ 18V DC power supply to the board through J1.
4. Connect null modem serial cable between GESBC-9G20i debug port P0 and PC/terminal
serial port.
5. Launch a terminal emulator, such as HyperTerminal, or minicom, on the PC configured to
connect to the serial port of the GESBC-9G20i. Configure the serial port with the
following parameters: 115200 bits per second, 8 data bits, no parity, 1 stop bit, no flow
control.
6. Connect the board to a local area network (optional)
Operation
A few seconds after applying power to the GESBC-9G20i, debug information will be displayed on
the terminal program. The following figures show what this should look like.

GESBC-9G20i User’s Manual
Version 0.2 Page 8 of 21 20-Sep-13
Please see

GESBC-9G20i User’s Manual
Version 0.2 Page 9 of 21 20-Sep-13
Chapter 4 – Software Description for more details regarding the software functionality.

GESBC-9G20i User’s Manual
Version 0.2 Page 10 of 21 20-Sep-13
Chapter 3 – GESBC-9G20i Function Blocks
AT91SAM9G20
The GESBC-9G20i Single Board Computer uses the Atmel AT91SAM9G20 as the core processor
on this development board. The top-level features of AT91SAM9G20 processor are the following:
•ARM926EJ-S RISC Core Processor
•400 MHz / 400 MIPS Performance
•32Kbyte Instruction Cache
•32Kbyte Data Cache
•Linux and Windows CE enabled MMU
•133 MHz System Bus
•32 bit SDRAM Interface
•Serial EEPROM Interface
•10 / 100 Mbps Ethernet MAC
•6 UART
•Two-port USB Host
•4 channel 10 bit ADC
•2 SPI Port
•Serial Audio Interface
•JTAG Interface
More detailed information regarding the AT91SAM9G20 processor can be found at
www.atmel.com.
SDRAM
The AT91SAM9G20 features a unified memory address model where all memory devices are
accessed over a common address and data bus. The GESBC-9G20i supports 32MB SDRAM.
FLASH
The GESBC-9G20i is shipped with 128Mbytes of NAND FLASH memory.
RS-232 Port 0, 1, and 2
The GESBC-9G20i Single Board Computer is shipped with two 3-wire RS-232 UART interface,
and one 9 wire RS-232 UART interface.