Critical Design Review

February 28, 2006

Brianna BethelRobert HavlikJessica Lowry

Alex Silva

Outline• Project Overview• Hardware Description

– Description of each unit and its schematic• Software Processes• Division of Labor• Updated Schedule• Parts and Cost

Project Overview• To create a standalone, portable, easy-

to-use system to display pictures without a computer

• Display pictures on a color LCD screen• Include user interface• Stores and retrieves pictures from Compact Flash cards

Hardware Block Diagram

Sharp MicrocontrollerLH79525

Compact Flash Card

Host Computer

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

Future Revisions

Baseline

Power System• 12V DC Wall Input

– 12V supplies backlight inverter for LCD

• Regulated to 3.3 V– Supplies microcontroller

and peripherals• 1.8 V regulator in processor• Isolated analog sections• Power and Ground Planes

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

Power System Schematic

Microcontroller• Features

– LCD controller– 24 bit address, 16 bit data

• Functions– Runs Software and

Embedded Linux– Controls all memory

devices and timing for LCDs

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

Microcontroller Schematic

Reset and Oscillator Circuits• Two oscillators

– 11.2896 MHz– 32.768 KHz

• Reset in a box– Pushbutton reset– Power monitoring

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

Reset (and Oscillator) Schematic

Hardware Memory Map

SDRAM• 256 Mbits (32 MB)• Functions

– Primary run-time application storage

– Software, Bootloader and Embedded Linux run-time environment

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

SDRAM Schematic

Buffers• Isolates SDRAM

from other memory devices

• Boosts system signal integrity

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

Buffer Schematics

NOR and NAND Flash Memory• NOR

– 128 Mbit (16 MB)• NAND

– 512 Mbit (64 MB)• Large, non-volatile

memory storage• Contains bootloader• Programmed through

JTAG Wiggler (Sparkfun)

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

NOR Flash Schematic

NAND Flash Schematic

SRAM Memory

• 4 Mbits (256 kB)• Functions

– Additional storage– Frame buffer– Backup if SDRAM

is not functional

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

SRAM Schematic

Compact Flash• Large, non-volatile

storage device• Memory mode only• Sparkfun breakout

board

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

Compact Flash Schematic

Serial RS-232 and IR Connectors

• RS-232– 115 kbps– Tera Term host

interface• Infrared

– Serial interface

Sharp MicrocontrollerLH79525

Compact Flash Card

SDRAM

LCD Display (STN or TFT)

Touchscreen

USB

IR Sensor and Remote

Serial Interface

User Interface Buttons

Buffers

SRAM

NOR Flash

NAND Flash

Oscillator

Power Reset

Serial RS-232 and IRConnectors Schematic

Software Block DiagramModel

(Main Functions)

View(User Interface)

Controller(Drivers)

+ProcessXYcoordinateInput() : int

«interface»TouchScreenInputHandler

+Select_Function()

«delegate»ApplicationLauncher

-ApplicationInterface

«implementation class»LCDDisplayDriver

-FrameBuffer+DisplaySettings

«implementation class»TFTLCDdriver

-FrameBuffer+DisplaySettings

«implementation class»STNLCDdriver

+RetrieveFile()+WriteFile()+GetFileNames()

«interface»FileSystem

Selects

View«interface»

DisplayMenuModifies

uses

invokesController

retrieves data from

+OpenFile()+CloseFile()

-File Data

«implementation class»MediaDriver

+start()

«delegate»Modify Picture Controller

+start()+picture_display()

«delegate»Display Picture Controller

+display()+crop()+rotate()+zoom()+retrieve()+nextImg()+previousImg()

-file name

«utility»Picture

Model

+start()+stop()+start_timer()+picture.display()+wait_for_timer()

«delegate»SlideShow Controller

+start()+stop()

-Time_To_Wait

«utility»Slideshow Timer

uses

«implementation class»TouchscreenDriver

retrieves data from

retrieves data from

Linux

invokes

View

 

+ProcessXYcoordinateInput() : int

«interface»TouchScreenInputHandler

+Select_Function()

«delegate»ApplicationLauncherSelects «interface»

DisplayMenuModifies

Model

+start()

«delegate»Modify Picture Controller

+start()+picture_display()

«delegate»Display Picture Controller

+display()+crop()+rotate()+zoom()+retrieve()+nextImg()+previousImg()

-file name

«utility»Picture

Model

+start()+stop()+start_timer()+picture.display()+wait_for_timer()

«delegate»SlideShow Controller

+start()+stop()

-Time_To_Wait

«utility»Slideshow Timer

uses

Controller

-ApplicationInterface

«implementation class»LCDDisplayDriver

-FrameBuffer+DisplaySettings

«implementation class»TFTLCDdriver

-FrameBuffer+DisplaySettings

«implementation class»STNLCDdriver

+RetrieveFile()+WriteFile()+GetFileNames()

«interface»FileSystem

invokesController

retrieves data from

+OpenFile()+CloseFile()

-File Data

«implementation class»MediaDriver

«implementation class»TouchscreenDriver

retrieves data from

retrieves data from

Linux

Development Environment• Programming in C• Compilation

– Compile in Arm Developer Suite (or Cygwin)

• ADS and Linux have similar code files– Color LCD panel initialization– Creates templates for custom

development

Embedded Linux• Functions

– Handles hardware initialization

– Compact Flash driver

– Allows for higher level applications

– Source code for future applications

Division of Labor Task Responsible Team

PCB Design All Embedded Linux All• Hardware Engineers Rob & Alex

– JTAG Wiggler– PCB Placement of Parts

• Software Engineers Brianna & Jessica– LCD Driver (Dev board and custom)– Display Single Picture– Timer for Slideshow

Milestone 1 : March 21• Have custom hardware running• Second revision ready for fabrication• LCD Driver

– Display still picture on LCD screen

Milestone 2 : April 18• Have slideshow program functional• User interface development

– Touchscreen• Implement possible extensions, time

permitting

Capstone Expo : May 4• Everything completed and working

Schedule

Current Progress• Microcontroller

with Linux Loaded– Includes custom

Linux kernel• Hardware Layout

and Routing Complete

• Custom PCB ready to be sent out

PCB Layout Rev 0

PCB 3D

Budget

Questions?