P09321 DETAILED DESIGN REVIEW ELECTRICAL/SOFTWARE/ FIRMWARE SYSTEMS

P09321 DETAILED DESIGN REVIEWELECTRICAL/SOFTWARE/FIRMWARE SYSTEMS

Felix Feliz

Matthew Jones

Michael Boquard

Rebecca Jaiven

Justin Zagorski

Shuaib Mansoori

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OVERVIEW

1. Project Intro & Dispenser Layout2. Embedded System Selection3. Firmware Data Flow4. User Access Levels5. GUI Mock Ups6. EE Dispensing System7. MSDII Timeline8. Issues9. Appendix

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INTRO – PROJECT DESCRIPTION

o Produce a robust prototype that dispenses medication on a time-bases to patients in a secure and accountable environment.

o Allow to dispense a week’s supply of up to 6 different pills for two patients accessed twice daily.

o Reliable and compact electro-mechanical dispensing system that can be controlled by a common laptop.

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INTRO – PROJECT DESCRIPTION

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MECHANICAL LAYOUT

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Lid

Cylinder Holder/ Latch

Support Rail

Ramp (Collapsible)

Empty Return Lid

Leg (Collapsible)

DISPENSING PROCESS

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REFILLING PROCESS

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OVERVIEW


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EMBEDDED SYSTEM SELECTION

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Field Programmable Gate Array (FPGA)USB MicrocontrollerEEPROM

Product Name I/O Pins FPGA Cost

EZ1CUSB 128 Altera Cyclone $199/$219

EZ1KUSB 58 Altera ACEX $169/$179/$189

EZ2USB 58 Xilinx Spartan-II

$169/$179/$189

XEM3001 86 Xilinx Spartan 3 $174.98

FPGA SELECTION

XEM3001

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XEM3001

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Pro’sOne of the cheapestBuilt in USB FPGA interfaceHigh level of support and tools (SDK’s and API’s)Good number of I/O PinsFamiliar with Xilinx Spartan 3 FPGA’s

Con’sHard to solder (easier than the other three)

Has male-female connectors that attach to the holes

Needs to be programmed at startEasy to reprogram with provided SDK (one line

of code!)

EEPROM COMPARISON: PARALLEL OR SERIAL

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Parallel Pro’s

Easiest to write to Higher memory density Better AC performance

Con’s Very large foot print (Size

of 2N bits requires N pins, for addressing, and other pins for power, select, etc)

Higher power consumption

Costly

Series Pro’s

Smaller footprint (only about 8 pins)

Smaller power consumption (good if an onboard battery is used)

Faster access time Cheaper

Con’s More complexity

involved in writing/reading data from EEPROM

Conclusion: Series

Two different kinds of serial, SPI and I2C

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EEPROM COMPARISON: SPI OR I2C

I2C Pro’s

Easier to implement multiple devices on same bus

Communicate with on-board infrequently used devices easily

Con’s High complexity

compared to SPI Half-duplex

SPI Pro’s

Faster Full-duplex Less overhead than I2C

due to no addressing Con’s

More devices requires more wires and more hardware

Conclusion: SPI

Component Selected: Spansion 8-Mbit SPI EEPROM

OVERVIEW


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FIRMWARE DATA FLOW - EXISTING

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FIRMWARE DATA FLOW - PROPOSED

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OVERVIEW


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LEVELS OF USER ACCESS

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Super User Direct access to each solenoid Can check and clear SmartCartridge™

Memory User Access Control Connect and remove SmartCartridge™ Set SmartCartridge™ Settings

Pulse time of solenoid Sensor Sensitivity

LEVELS OF USER ACCESS – CONT.

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Administrator User Access Control Check SmartCartridge™ History Connect and remove cartridge

Pharmacist Check SmartCartridge™ History Add and adjust medication Connect and remove cartridge

Delivery Connect and remove cartridge

LEVELS OF USER ACCESS – CONT.

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Caregiver Can dispense medication for patient under

caregiver’s care Patient

Can dispense own medication

OVERVIEW


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GUI Mockup – Connect SmartCartridge™

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GUI Mockup – Patient/Caregiver Screen

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GUI Mockup – Patient/Caregiver Screen, cont.

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GUI Mockup – Administrator/User Access Control

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GUI Mockup – Administrator/User Access Control, cont.

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GUI Mockup – Super User

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GUI Mockup - Pharmacist

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OVERVIEW


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EXISTING ELECTRICAL DISPENSING SYSTEM

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Appendix D: Schematics

PROPOSED ELECTRICAL DISPENSING SYSTEM

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Appendix XXXXX: Schematics

SYSTEM LEVEL CHANGES - ELECTRICAL

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Existing Change Reason

3.3V Regulator Remove Not necessary to power components

Mux/ Demux Remove Replace with FPGASystem ROM Update Old TechnologyNon-standard connector Change To USB 2.0 for standardizationMemory Card Connector Remove Replace with LaptopMicrocontroller Remove Replace with LaptopSensors Addition Increased reliability and securityFPGA Update Old Technology

POWER BUDGET

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COMPONENT PRELIMINARY BOM - ELECTRICAL

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Dispensing System

Existing Components:

New Component:

Description Manufacturer Price per unit

Quantity (min)

LM2675MM-ADJ LM22675

LM2675 - SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator

National Semiconductor $1.68 1

MAX471/SO MAX4071 Bidirectional, High-Side, Current-Sense Amplifiers Maxim $1.53 1

LM2941CS X LM2941C - 1A Low Dropout Adjustable Regulator

National Semiconductor $0.87 1

LM1117MP-5.0 X LM1117 - 800mA Low-Dropout Linear

Regulator National Semiconductor $0.42 1

MIC2982/SO UDN2981A Row Drivers Allegro $1.78 4

MIC2982/SO A6800 Column Sinks Allegro $1.60 4

Dispensing Board

Material Quantity Price

Copper Traces 36” ~5$

Circuit Board Material

7.75” x 11.5" TBD

COMPONENT PRELIMINARY BOM - ELECTRICAL

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Biometric Sensor

Component Cost Quantity

Digital Persona: U.are.U 4500 $99 1

Detection Sensors

Component Cost Description Manufacturer Quantity (min)

OPB100Z $9 Optical Emitter and Sensor Pair OPTEK TBD

OPB700Z $11 Hi-Reliability Reflective Object Sensor OPTEK TBD

GP2D120 $12 Sharp Optoelectronic Device Sharp TBD

Detection Sensor Circuitry


Power Supply Circuitry TBD

AI-3035-TWT-3V-R $3.40 Piezo Indicator, Internal Drive Projects Unlimited 1

LM2675-3.3 $2.01 LM2675 - SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator

National Semiconductor 1

COMPONENT PRELIMINARY BOM - EMBEDDED

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Miscellaneous


LED $0.60 Green LED Super Bright LEDs 1

MW173KB1203B01 $38.65 PS EXT 30W 12V @ 2.50A E-STAR

SL Power Electronics Manufacture of Condor/Ault Brands

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PCL712A $2.85 CONN JACK STR MINI POWER PCB Switchcraft Inc. 1

Embedded System


XEM3001 $174.95 FPGA w/ built in USB microcontroller Opal Kelly 1

S25FL008A $4 8MB 50MHZ SPI EEPROM Spansion 1

ADDITIONS TO DISPENSING CIRCUITRY

Sensors Buzzer

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PROPOSED DISPENSING TRACES ON CIRCUIT BOARD - SOURCE

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PROPOSED DISPENSING TRACES ON CIRCUIT BOARD- SINK

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Connections and Cabling

Input to PCB Board: 2 Conductors, 3

Contacts From Driver:

Cable Ribbon to Nitinol Arrays

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OVERVIEW


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MSDII Timeline

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OVERVIEW


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ISSUES

Sensor’s SensitivityCabling properlyTimeline for prototyping and PCB

Constant Current ControllerMOSFET vs. Bipolar devices

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OVERVIEW


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APPENDIX

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BACK UP SLIDES

Definition of Parallel EEPROM

Typically has 8-bit data busAddress bus large enough to cover complete address range

Ex. 1024 addresses = 210 addresses, so 10 bits for a data bus

To Write:Enable Write with Address SelectedDisable Write when data is asserted on data pins

To Read:Enable Read with Address SelectedRead data asserted on data pins

Definition of Serial I2C

2 wire-inputSerial Data (SDA)Serial Clock (SCL)

Communication ProcessMaster sends start conditionMaster sends unique 7-bit address of the slaveMaster sends read/write bit (0 – write, 1 – read)Receiver (Master when read, slave when write) sends “ACK”nowledgementTransmitter (Master when write, slave when read) transmits 1 byteReceiver sends ack (repeats till stop)

P09321 DETAILED DESIGN REVIEW ELECTRICAL/SOFTWARE/ FIRMWARE SYSTEMS

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