Atmel AT91SAM9X35 User manual

Embedded Display Module
EDM6070AR-01
Atmel AT91SAM9X35 Based Single Board Computer
BY
User Manual
Version 1.0
Dated: 3rd December 2013

Revision History:
Version Date Description
1.0
03/12/2013
Original Version

Table of Contents
Chapter 1: Product Overview............................................. 1
1.1 Introduction .............................................................1
1.2 Kit Contents .............................................................3
1.3 Expansion Board Interfaces........................................4
1.4Core Board Interfaces................................................4
1.5 System Block Diagram...............................................6
1.6 Physical Dimensions (mm) .........................................7
Chapter 2: Hardware Features .......................................... 8
2.1 Processor .................................................................8
2.2 On-Board Memory.....................................................8
2.3 On-Board Interfaces..................................................8
2.4 Others .....................................................................9
2.5 Operational Parameters..............................................9
Chapter 3: Software Features.......................................... 10
3.1 BSP Package...........................................................10
3.2 Example Applications...............................................11
3.3 API Functions .........................................................12
Chapter 4: Demonstration and Test Functions................. 16
4.1 Smart Home Automation Demo.................................16
4.1.1 Demo Features..................................................17
4.1.2 Programming the demo......................................21
4.2 System Setup.........................................................23
4.3 Testing Features......................................................24
4.3.1 Touchscreen Test ...............................................24
4.3.2 LCD Colour Test.................................................24
4.3.3 LCD Backlight Test.............................................25
4.3.4 Ethernet Test ....................................................25
4.3.5 Serial Interface (RS232) Test ..............................26
4.3.6 CAN Bus Test ....................................................27

4.3.7 RS485 Bus Test .................................................28
4.3.8 USB Test...........................................................29
4.3.9 RTC Test ...........................................................30
4.3.10 TF Card Test..................................................31
4.3.11 LED Test .......................................................32
4.3.12 Buzzer Test ...................................................32
4.3.13 GPIO Test......................................................32
4.3.14 Button Test ...................................................33
4.3.15 Screen Capture Test .......................................34
4.3.16 Audio Test .....................................................34
4.3.17 Watchdog Test...............................................35
4.3.18 Telnet Test ....................................................35
4.3.19 Mounting NFS (Network File System)................38
4.4 Transferring Files Using SecureCRT............................39
4.5 Transferring Files Using Network Protocol...................40
4.6 Linux QT Demonstration...........................................42
Chapter 5: Development Environment and System
Compilation………………....................................................... 44
5.1 Building a Cross Compilation Environment..................44
5.2 System Compilation ................................................45
5.3 Uncompressing Files................................................45
5.4 Making a Bootstrap .................................................46
5.5 Making a U-boot .....................................................47
5.6 Making a Kernel......................................................47
5.7 Making a File system Image .....................................48
Chapter 6: System Customization.................................... 49
6.1 Kernel Customisation...............................................49
6.2 File system Customisation........................................51
6.3 Simple Driver Modules in Kernel................................52
6.4 Using Makefile to Associate Drivers with Kernel...........55
6.5 Compiling and Downloading Drivers...........................55

6.6 Brief Introduction to Applications ..............................56
6.7 Compiling and Running Applications ..........................57
6.8 Common Functions..................................................58
6.9 Linux Multi-Thread Programming...............................59
6.10 Linux Network Programming.....................................61
6.11 Compiling Server ....................................................64
6.12 Compiling Client......................................................64
6.13 Running Server and Client........................................65
Chapter 7: Updating the Linux System ............................ 66
7.1 Images and the Programming Tool ............................66
7.1.1 Programming System Image Automatically...........67
7.1.2 Programming System Image Manually..................69
7.2 Preparations...........................................................69
7.3 Programming Image Files.........................................71
Chapter 8: Appendix A: Common u-boot Instructions ..... 76

Page | 1
Chapter 1: Product Overview
1.1 Introduction
The EDM6070AR-01 is an ARM based Single Board Computer (SBC),
designed & developed by element14. It comprises of a 7” LCD display and
touch screen assembly, integrated with multi-functional embedded
hardware based on Atmel’s ARM9 AT91SAM9X35 industrial processor.
The EDM6070AR-01 is a fully integrated Embedded Display Module solution
for a variety of embedded control HMI applications, ready to drop into your
product with negligible integration effort, OR to just wrap an enclosure
around, add a software application and become your finished product.
The EDM6070 is designed to fulfil the different requirements of various HMI
applications including:
Industrial control terminals
Intelligent instruments
Data acquisition and analysis
Medical products
Network terminals.
The EDM6070AR-01 consists of three parts: a MINI6935 CPU core module,
an expansion board, and a 7” TFT LCD (800×480) with resistive touch
screen.
MINI6935 CPU module is an ARM embedded board,
integrated with the ATMEL ARM926EJ-S-based processor
AT91SAM9X35, operating at 400MHz frequency. The board has
128MB DDR2 SDRAM, 256MB NAND Flash, 4MB DataFlash, 4KB
Two-wire EEPROM.

Page | 2
The Base Board expands the rich set of connectivity and user
interface peripherals of the Atmel AT91SAM9X35 including Ethernet
and CAN interface. The board also has a TFT touch screen LCD
interface, USB hosts/device, Buzzer, RS232, RS485, Audio, GPIOs
and an SD card interface to allow for large storage capabilities.
LCD Touch screen Display is a 4-wire resistive touch screen
TFT LCD display with a display resolution of up to 800x480 with
24-bit colour depth.
The EDM6070AR-01 includes Linux BSP and supports the Linux QT GUI
(Graphical User Interface) and multiple file systems like, FAT, NTFS etc. It is
also supplied with a Smart Home demo application (include smart-led
controller, weather controller, video) and a number of example applications
to give you a quick and easy start.

Page | 3
1.2 Kit Contents
The EDM6070AR-01 SBC is packed with the items listed below:
MINI6935 CPU Process Board based on AT91SAM9X35 MCU
Expansion Base Board
7” Touchscreen LCD Display
Product DVD/CD includes BSP, demo application & technical
documentation.
Optional Accessories (must be purchased separately):
Serial Cable (Cross Over Female-to-Female)
Ethernet Cable
MicroUSB Cable
Serial Interface Adapter
Power Adapter (12V@1.25A)

Page | 4
1.3 Expansion Board Interfaces
Figure 1: Base Board Interface with Mounted CPU Module
1.4 Core Board Interfaces
Figure 2: MINI6935 CPU Module (Front View)

Page | 5
Figure 3: MINI6935 CPU Module (Rear View)

Page | 6
1.5 System Block Diagram
MAC
DM916
Data
AT25DF321 32MB
NAND
K9F2G08U0
TWI
AT24C04BN
AT91SAM9X35
RTC
Watchdog
Key
Reset
SD CARD
USB Device
USB Host
GPIO
ISO
LCD
800x480 RGB 7
Audio
RS232
Debug Port
CAN 2.0
ISO
RS485
ISO
DDR2
MT47H64M16HR
Figure 4: System Block Diagram

Page | 7
1.6 Physical Dimensions (mm)
Figure 5: Mini6935 Dimensions
Figure 6: Expansion Board Dimensions

Page | 8
Chapter 2: Hardware Features
2.1 Processor
Atmel AT91SAM9X35 ARM9 32-bit processor, 400MHz
16KB data cache, 16KB instruction cache, memory management
unit
64KB internal ROM and 32KB internal SRAM
2.2 On-Board Memory
128MB DDR2 SDRAM
256MB NAND Flash
4MB DataFlash
2.3 On-Board Interfaces
7” TFT LCD display, resolution of 800x480 with 24-bit colour depth
10/100Mbps Ethernet interface, using a DM9161CIEP chip,
extendable via expansion board
RS232 interface, 1 RS485 interface, 1 CAN interface
USB Host high-speed interface
USB Device interface
Three GPIO Input interfaces
Four GPIO Output interfaces
Audio output interface, supporting MP3 playback
Debugging Interface, extendable via expansion board
TF card slot

Page | 9
2.4 Others
I/O interface LED indicator, 2 LED power indicators
Buzzer
I/O button
Reset button
RTC (no battery by default)
Watchdog
2.5 Operational Parameters
Operating Temperature: -10 °C ~ 70 °C
Operating Humidity: 0% ~ 90% (Non-condensing)
Power Supply: [email protected]
Electrical Standards: CE, FCC and CCC
Product Dimensions: 181mm x 120mm

Page | 10
Chapter 3: Software Features
This chapter will briefly introduce the BSP package in the CD-ROM, example
applications installed in the product and the API functions called by these
applications.
3.1 BSP Package
The CD-ROM provided with the EDM6070 contains a BSP (Board Support
package) which is used for building custom Linux systems. The table shown
below lists the contents of the BSP with corresponding descriptions.
Types Names Description
BIOS
Bootstrap Serial Flash
U-Boot
Serial Flash
Supports kernel and file system programming through
SAM-BA or USB flash drive (USB flash drive is
recommended)
Device
Drivers
Serial Debugging and COM2 serial interface on CPU
RTC
Internal RTC of AT91SAM9X35
Ethernet
10/100M Ethernet driver
Flash
NAND Flash and DataFlash driver
LCD
LCD driver, 800x480 resolution
Touch
Screen Touchscreen controller on CPU
USB Host
USB Host driver
Watchdog
Built-in watchdog driver
SD Card
SD card driver
CAN Bus
CAN bus
RS-485
RS-485 bus
LED System status LED
BEEP
B
uzzer driver
Audio WM8731EDS audio output driver
Button Custom user button driver
GPIO GPIO driver, 3 input channels, 4 output channels
Kernel Linux-2.6.39 ROM/CRAM/EXT2/EXT3/FAT/NFS/JFFS2/YAFFS2/UBIFS

Page | 11
Types
Names
Description
file systems
Root File
System
UBIFS Readable and writeable file system, supporting
compression storage
3.2 Example Applications
The Linux system installed in EDM6070 contains multiple example
applications under /home/app. Users can use those applications to
implement, test or demonstrate various product functionalities. The
following block diagram clearly shows the location of each example
application in the system.
Figure 7: Example Applications (Directory Structure)
/home/app
COM UART Test
EVTEST Event Devices
Test
GPIO GPIO Test
LED LED Test
BEEP Buzzer Test
CAN
CAN Test
CAN Receiver
Test
CAN Transmitter
Test

Page | 12
3.3 API Functions
Before you start to test the product, it is necessary to learn about the API
functions used by the example applications. If you need to understand the
working principle of an application in detail, read the source code stored
under “\02 Linux 2.6 Kit\01 Source Code\app\” in the CD-ROM
provided along with EDM6070.
The tables listed below will show you the API functions called by some of
applications and the relevant information.
LED API Function
LED_API int led_ctrl (char *name, int onoff);
Source ledlib.h
Functionalities Turn on or off LEDs
Parameters Name (LED’s name such asD6, D9 or D13)
onoff (0 for off, 1 for on)
Returned Values 0 for success, otherwise failure
Examples led_ctrl ("D9", 1);
Buzzer API
Function
BEEP_API int beep_ctrl (char *name, int onoff);
Source beeplib.h
Functionalities Controls the buzzer to make sound or stop
Parameters
Name (buzzer name, normally there is only
one buzzer which is called “beep”)
onoff (0 for off, 1 for on)
Returned Values 0 for success, otherwise failure
Examples beep_ctrl ("beep", 1); beep_ctrl ("beep", 0);
Serial Interface
API Function
int OpenDev(char *Dev);
Source com_example.c
Functionalities Enable serial devices and acquire descriptors

Page | 13
Parameters
dev (character string of
serial devices, e.g.
“/dev/ttySAC0”)
Values more than 0 is a serial file descriptor,
less than 0 stands for failure
Returned Values com_example.c
void set_speed(int fd, int speed);
Source com_example.c
Functionalities Set the bitrate of serial interfaces
Parameters fd (serial file descriptor)
speed (bitrate, e.g. 15200)
Returned Values None
int set_Parity(int fd,int databits,int stopbits,int parity,int
flowctrl);
Source com_example.c
Functionalities Set serial interface
data bits, stop bits, parity
check and data flow control
Parameters
fd (serial file descriptor)
databits (length of data bits)
stopbits (length of stop bits)
parity
(check type, N for no check, O for odd
check, E for even check)
flowctrl
(switch of hardware data follow
control, 1 for enable, 0 for disable)
Returned Values 0 for success, otherwise failure
size_t read(int fd, const void *buf, size_t nbytes);
Source unistd.h
Functionalities
Called by system to acquire data received on
the serial interfaces
Parameters
fd (serial file descriptor)
buf (pointer to the received data)
nbytes (data length about to be read, Byte)
Returned Values
Values less than 0 stands for error, more than
0 stands for received data length (Byte)
size_t write(int fd, const void *buf, size_t nbytes);
Source unistd.h
Functionalities Called by system to send data through the
serial interfaces
Parameters fd (serial file descriptor)

Page | 14
buf (pointer to the data about to be sent)
nbytes (length of data about to be sent, Byte)
Returned Values
Value of less than 0 stands for an error, more
than 0 stands for a
data length being sent
(Byte)
int close(int fd);
Source unistd.h
Functionalities Called by system to disable the serial
interfaces
Parameters fd (serial file descriptor)
Returned Values 0 for success, less than 0 stands for error
GPIO API Function
int open(const char *path, int oflags);
Source gpio_example.c
Functionalities Initialize the GPIO device node
Parameters Path: /dev/gpio.0 oflags: O_RDWR
Returned Values 0 for success, otherwise failure
int close(int fildes);
Source gpio_example.c
Functionalities Release GPIO
Parameters fildes: open returned file descriptor
Returned Values 0 for success, otherwise failure
ioctl(fd, GPIO_GET_VALUE, pin);
Source gpio_example.c
Functionalities Read the logic level of the input pin
Parameters Pin (GPIO pin name, such as GPIO_PB15)
fd (GPIO device descriptor)
Returned Values Return level value in digit 0 or 1
ioctl(fd, GPIO_SET_PIN, pin);
Source gpio_example.c
Functionalities Allow the output pin provide a
high level
output
Parameters Pin (GPIO pin name, such as GPIO_PD18)
Returned Values None

Page | 15
ioctl(fd, GPIO_CLR_PIN, pin);
Source gpio_example.c
Functionalities Allow the output pin to provide a
low level
output
Parameters Pin (GPIO pin name, such as GPIO_PD18）
Returned Values None