IntelliCart
TM
Automated Shopping and Checkout System
Peter Dao, Joseph Esler, Brett Halper, Jason Price
High-level Diagram
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Mid-level Diagram
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Low-level Diagram
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Power Schematic:
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GPIO / Xbee Schematic:
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RFID Schematic:
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RFID PCB Layout:
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Main PCB Layout:
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Project Deliverables:
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Deliverable:
125 kHz ID-20 RFID Reader w/ RFID tag
4.3 Inch Digital Touch Panel Graphic LCD
(800 x RGB x 480)
Analog Devices AD7843 AD Converter
JTAG - UART
GPIO – Serial UART
Power system
Cyclone II FPGA
Magnetic stripe card reader
Keyboard
Memory
User Interface
Optional:
DE2 development board
Bluetooth module(s)
2-line/16 segment LCDs
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FPGA Implementation:
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NIOS II/e processor
RISC soft-core
Storage
64 Kbyte on-chip memory
Flash controller
SRAM controller
JTAG universal asynchronous
receiver/transmitter (UART)
GPIO – Serial UART
Timer
32-bit source registers
HAL API
Newlib ANSI C standard
library
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EP2C35 I/O Banks:
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NIOS II Soft-Core:
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On-Chip and Flash Memory:
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64-Kbyte on-chip memory
FIFO memory
4-Mbyte Flash memory
8-bit data bus
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Flash Memory:
· Command/Address/Data
Multiplexed I/O port
· Hardware Data Protection
· Program/Erase Lockout
During Power Transitions
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SRAM Read and Write Transfers:
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ISSI IS61LV25616 high-speed
Static RAM
512K byte(256K X16) SRAM
CMOS low power operation
Low stand-by power
TTL compatible interface
levels
Single 3.3V power supply
Fully static operation: no clock
or refresh required
Three state outputs
Data control for upper and
lower bytes
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Interrupt Handling:
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JTAG Interface:
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Serial UART Core
Controller:
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Software:
 Compiled and ran “Hello World” program (output below)
 Completed ASCII parsing of RFID reader input on DE2 board
(Demo on next two slides)
 New plan: Write C/C++ code in “style” of Java
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Demo: RFID Reader Test Code
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Demo: Output
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Simplified Use Case Diagram
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Example Use Case Description
Shopper-Initiated Use Case
Use Case Name: Remove Item
Actor: Item RFID tag
Summary: The shopper places an item in proximity of the cart's RFID reader.
Precondition: The cart system is powered on and the item's RFID tag is within the range of the cart's RFID
reader.
Description:
When an item's RFID tag comes in proximity of the cart's RFID reader, the reader generates an interrupt
with the RFID tag value. The cart system uses that value to determine whether the order already contains
the item and to suggest related items.
Alternatives: The order does not contain the item, in which case the actor initiates the “Add Item” use case
instead. The cart system does not recognize the RFID tag value, so the cart system alerts the Shopper to
contact the Clerk, who initiates the “Manually Remove Item” use case. Error condition—the cart system
does not detect an RFID tag.
Postcondition: The cart system has removed the item from the order and updated the total; if applicable,
the cart system has also suggested related items as alternatives to the item removed.
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Static Model of the Problem Domain
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System Context Class Diagram
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Extended Static Class Diagram
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RS-232 Interface:
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LCD Interface:
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LCD Touch-Screen Module (LTM) is equipped with a
LCD driver IC to support 3 display resolutions.
LTM is connected to FPGA via 40-pin expansion
header IDE cable.
Serial Interface and ADC share the expansion header.
LTM came with AD7843 digitizer chip for analog –
digital converter.
LCD Touch-screen:
Budget:
Component
Manufacturer
Cyclone II FPGA 208-QFP
Altera
Memory/Storage
Price
-Donated$30
PCB Fabrication (two rev)
Advanced Circuits
$120
Touch-Screen LCD
Terasic
$210
PS2 Keyboard
$30
MiniMag Credit Card Reader
IDTech
$55
Xbee 1mW Bluetooth
Digi
$25
125kHz ID-20 RFID Reader (x4) and tags
ID Innovations
$160
RFID Daughter Board Components
On-Board Power Components
$40
TI / ST Microelectronics
Off-Board Power Components
Printing/Binding
$15
$50
Kinko’s
$50
Fabrication Classes
$100
Misc. Parts / Costs
$120
Total
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$1,000
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Parts List:
Component
Source
Price/ea
Quantity
Total
ID-20 RFID Reader
http://www.sparkfun.com/commerce/product_inf
o.php?products_id=8628
34.95
3
104.85
LM317 Regulators
http://search.digikey.com/scripts/DkSearch/dksus
.dll?Detail&name=296-12602-1-ND
.62
2+1
3.72
L6932 Regulator
http://search.digikey.com/scripts/DkSearch/dksus
.dll?Detail&name=497-4596-1-ND
2.85
1+1
5.70
CC Reader
http://www.barcodesinc.com/idtech/minimag.ht
m IDMB377112
55.50
1
55.50
Cyclone II FPGA
SDRAM
Lab
3.80
1
1
3.80
Flash
http://search.digikey.com/scripts/DkSearch/dksus
.dll?Detail&name=M25P32-VMF6TPCT-ND
6.39
1
6.39
LCDs
Keyboard
Lab
214.11
38.98
1
1
214.11
38.98
Xbee 1mW
Bluetooth
Misc. passive
components
http://www.sparkfun.com/commerce/product_inf
o.php?products_id=8664
24.95
1
24.95
N/A
50.00
1
50.00
AC/DC inverter
Battery
N/A
N/A
N/A
N/A
N/A
N/A
N/A
3/15/2016
http://search.digikey.com/scripts/DkSearch/dksus
.dll?Detail&name=557-1089-1-ND
http://search.digikey.com/scripts/DkSearch/dksus
.dll?Detail&name=CH924-ND
N/A
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Project Status:
 ASCII Parsing Operational
• RFID Communication
 Software Conversion Tag/Product
 Use Case Descriptions Written
 Schematics / PCB Layout 90% Complete
 NIOS II Processor Running
 Early LCD Touch-Screen Tests
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Schedule:
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Schedule (Key Things):
 Hardware: First Version of PCB Layout
 FPGA: SRAM, SDRAM, and Flash
 Software: Communication and Sequence Diagram
for Lookup Table
 Interfaces: LCD output and touch-screen
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