The World Leader in High Performance Signal Processing Solutions
Personal Digital Notepad
October 24,2007
Project Guides
Group Members
Dr.(Mrs.) P.P.Warnekar
 Mr. Sandip Kothari,
Analog Devices Inc.
 Mr. Akshay Mishra,
Tata Teleservices


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Srinath Iyer (34)
 Harsh Parekh (52)
 Siddhartha Gupta (29)
 Pratik Maheshwari (41)
Aim of the project
To design a handheld device having a touch screen interface to
be used for scribbling notes
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Agenda
A.
Introduction
• 5 Processor P’s
• uClinux Benefits
B.
Steps Involved
C.
Hardware and Software Requirements
D.
Detailed Process
E.
Application Example and Uses
F.
References
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5 Processor P’s








uClinux 2.6.12 kernel
Open Source Development
Tools (gcc, gdb, kgdb, oprofile)
Thousands of Open Source
Applications
10/100 Enet MAC
UART
High Speed Serial Ports
Drivers for External:
 Various Codecs
 ADC, DAC (SPI)
 Compact Flash (IDE,
802.11b)
 IDE (Hard Drive, CDROM, DVD)
 NOR, NAND Flash
(YAFFS, JFFS2)


Target, Toolchain, and
kernel


Performance


5
$4.95 @ 10k units for BF531
$200 for complete Open
Source Development Suite
Up to 600MHz:
992.87 BogoMIPS @ 500MHz
265mW Core, 600 MHz @
1.2V
uClinux Power
Management Drivers, for
Dynamic voltage/clock
control
What’s so special about uClinux?









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Source code freely available
No runtime licenses
Robust and reliable
Modular, configurable, scalable
Superb support for networking and Internet
Supports a large number of devices, file systems, and networking
protocols
Large pool of skilled developers and documentation
Upgrades and new features are constantly being added, tested and
refined by a large community of programmers and users
Large number of applications and tools exist which require little to no
porting effort
Portable
Embedded Linux
Porting the Linux kernel to run on a particular CPU and board which to be used
in an embedded device (cell phones, PDAs, other consumer electronics)
 uClinux
One type of Embedded Linux, “Microcontroller Linux”
 Derivative of the Linux kernel for processors without an MMU
 uClinux kernel tree maintained at: www.uclinux.org
 Blackfin port maintained at: http://www.blackfin.uclinux.org

 Considerations

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/ Trade-offs:
The Blackfin Processor does not have a full-fledged MMU. (Virtual Memory
Management)

Normally Unix uses the MMU to allocate different physical memory areas to identical
virtual memory addresses.

uClinux removes the MMU requirement by implementing a flat memory model (a 1-to-1
virtual-to-physical mapping)

The key feature of uClinux is the ability to look and feel almost like a MMU-based system.
Components of an Open Source System
uClinux Kernel Release 2.6.12
gcc release 3.4.4
Binutils release 2.15
Serial or
Ethernet
Source Code
uClinux
Kernel
Standard
Apps
Code Generation Tool
Compiler
(gcc)
Assembler
(gas)
Binutils
Custom
Apps
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Linker
(ld)
Apps
debugger
(gdb)
JTAG
kernel
debugger
(gdb)
Hardware and Software Requirement
•
Hardware
 The
BF-561 EZ-Evaluation kit
 ADI-HPPCI-ICE (JTAG Emulator)
 6” Touchscreen
 6” Television set
•
Software
 Unix
based Operating System (Fedora Core)
 Qtopia Core Version 4.3.2
 VisualDSP++5.0 (IDE)
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The BF-561 Evaluation Kit
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Why BF531?
 Application
deals with complex image processing of high resolution.
Hence, need for a DSP Processor
 Arm
9 and Freescale i.MX1 series is not appropriate
 BF531
is the cheapest low end DSP Processor from Analog Devices
 Support
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from Analog Devices Inc
Steps Involved
 Develop
a basic paint application using Qtopia Core V- 4.3.2
(a popular open source platform for application development on
handheld devices)
 Testing
the application with a uCLinux kernel on the BF-561 EZ Evaluation Kit
 Design
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a hardware schematic for the handheld device
Detailed Process
 STEP
1 -> APPLICATION DEVELOPMENT
 Use
Qtopia Core 4.3.2, a Linux based application development software
to develop a minimalistic scribble application
 Three
options:- File, Options, Help
 Image
is to be saved with *. png or *.jpeg extension
 No
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Handwriting Recognition used!
SCRIBBLE APPLICATION SCREENSHOT
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Detailed Process
 Step
 Set
2 -> Testing the application on evaluation board
up development host with Linux (Fedora Core 5)
 Install ADI-PCI JTAG Emulator and load VDSP++
 Connect the EZ-LITE board to the emulator using JTAG Cable
 Test the EZ-LITE board using VDSP++
 Install GNU Linux Toolchain for Blackfin on development host
 Compile Das U-Boot (Bootloader) using GNU Toolchain
 Port U-Boot onto the target board using VDSP++ and JTAG
 Setup a TFTP server for Serial Port communication with the target
 Load and Configure the uCLinux Kernel on the host
 Port the kernel to the target using U-Boot through the TFTP Server
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Detailed Process
 Step
2 -> Testing the application on evaluation board
 Configure
the kernel for the BF561 EZ-LITE board
 Cross-compile the application using GNU Toolchain
 Use the TFTP server to port the application to the target
 Reset the board and run the application.
 Connect a 6” BW Television to the VIDEO OUT of the board
 Place a touchscreen on the Television and connect it to the USB port of
the board
 Test the application using the touchscreen
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Detailed Process
 Step
3 -> Optimizing the application
 Step
4 -> Designing the product’s hardware schematic
involving




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1. Flash Memory
2. LCD & Touchscreen Controller
3. USB OTG
4. Power Management Unit
Applications of Notepad
 Can
be used for note taking in classrooms
 Eliminates
the need for notebooks for students and teachers
 Perfect
solution for press reporters and journalists
 Facility
to “read-back” your notes
 Facility
to transfer notes to your computer back home
 Digital
Laboratory Log book
 Technologies
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like Bluetooth, Wi-Fi can be incorporated at a later stage
REFERENCES
 http://www.analog.com
 http://www.blackfin.uclinux.org
 http://doc.trolltech.com/
 http://docs.blackfin.uclinux.org
 http://www.freertos.org
 http://www.qtforum.org
 http://www.maxim-ic.com/appnotes.cfm/appnote_number/1822
 http://www.freeelectron.com
 Embedded
 BF561
Linux, Dr. Chris Hollabaugh
EZ-KIT Evaluation Manual Rev 3.0
 HPPCI
Emulators Users Guide
 VDSP++ Loader Manual
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Thank You
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