Glucometer Wireless Design

Smartphone Blood Glucose Meter

Project 20 Hebah Hasan, Kim Kosko, Tyler Klarr

Mentor: Steve Murphy

Welcome to Project 20 - Smartphone Medical Device Hub44X Senior project

1 Project Overview

In today's society we rely heavily on modern technology to go about our daily lives; from protecting our youth to adding quality to our standard of

living. Technology is becoming more embedded in our lives providing us with data and information exchange that serves many different facets of life.

This project will bridge the gap between medical data and daily applications.

This project is the first step to improving data for those suffering with diabetes while also unifying their sources of data into one easily accessible

place like their smartphone. Integrating this data into such an application will lead the way to more accurate and safe data for users. Imagine,

checking your blood glucose while at work, the gym, or school with your smartphone and then be able to group that information with suggested

foods to help you plan your day.

This project is to create a proof-of-concept of a 'hub' that allows for attachment of specialty devices (including, but not limited to, medical devices)

to a current generation of smartphones (iPhone, Android, etc.). At a minimum the device must be able to measure blood glucose levels and upload

information to the smartphone. Also, using the same technology, there must be one other device that can use the 'hub' to connect to a smartphone.

The final goal is to embed circuitry and specialty connectors into a phone case that has the capabilities to take measurements as well as make

connections to specialty devices and transmit the information to a smartphone wirelessly. This would allow for a central device in modern life to

easily measure and monitor blood glucose levels for Diabetics as well as allow for connections with other devices tailored to making the smartphone

more accessible and useful.

Throughout our history, technology has served as the fundamental building blocks to our survival and development. From the first map to the first

navigation system, we have been able to add data exchange into our daily lives and move on to the next revolutionary frontier. This new system will

add that factor to those living with diabetes while having the potential to one day help many others suffering from different diseases.

Sponsored by Steve Murphy

The basic needs for our project after consulting with our mentor are:

*Blood Glucose Meter: The device must have the capability to quickly and accurately measure blood glucose levels by only using a reasonable

sample size.

*Case: Modern products, like smartphones, have sleek cases that are easy to use and look stylish. Current products have to match their styles in

order to compete in the market today. The customer will want something modern, easy to store, durable and light to carry.

*Conserves Power: The device must not waste power when not in use. Customers will save time and money by having a product that will conserve

power in between uses.

*Rechargeable: The customer will need to be able to easily recharge the device. Having a rechargeable battery will increase the portability of the

device. The customer will save money by using a rechargeable battery instead of consistently buying standard batteries.

*Self Powered: The device must be capable of making measurements without being connected to the smartphone. The customer might not have

their smartphone at the time that they take their blood glucose measurements, therefore the device should be able to work properly without the

presence of a smartphone.

*Software: There needs to be a method to at least track blood glucose measurements and store them on a smartphone for further review. The

measurements for customers will be more useful if they can track their individual measurements and be able to access them later on. The device will

be convenient for customers to bring to doctor appointments.

*Wireless: The device must be easily accessible to the smartphone. Customers will find it convenient to have their glucose meter be able to connect

and store information on their personal phone. A wireless connection will provide easy uploading without storing and using extra wires.

*PCB: The device needs to be about the same size as a smartphone. The device also needs to be easily replicated. The best way to accomplish this is

to custom make a printed circuit board.

*Indicator Light: The device should be able to indicate that it is working without the user having to look at the smartphone. The best way to do

this will be with an indicator light.

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Group Members (from left to right):

Kim Kosko - [email protected]

Tyler Klarr - [email protected]

Hebah Hasan - [email protected]

Table of Contents:

1 Texas Instruments' Contribution

2 Needs Identification and Background Research

3 System Requirements and Desired Features

4 Design Solutions

5 Top Level Block Design

5.1 Power Supply

5.2 Battery

5.3 Battery Charger

5.4 High-Level Controller Code

5.5 Smart Phone

5.6 Bluetooth Module

5.7 Micro-Controller

5.8 Low-Level Controller Code

5.9 TestStrips

5.10 Measurement Circuit

5.11 Case

6 Testing

7 Project Timeline

8 System Test Evidence

9 Expo Materials

References

[1]Location for the References

Attachments

Responsibility Contract.pdf (34.0 kB) - added by koskok on 10/15/10 13:23:56.

P1300119.JPG (0.9 MB) - added by koskok on 01/31/11 09:44:26.

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1. Texas Instruments' Contribution

1.) MSP430 The Blood Glucose Meter is controlled by the microcontroller. Texas Instruments MSP430F5438 is the best choice for the device. The

smartphone requires the wireless protocol to be the Bluetooth 2.1 protocol and this microcontroller is designed to be compatible with a Panasonic

board using Texas Instruments CC2560 chip to deliver the Bluetooth 2.1 protocol. Other benefits to this microcontroller are the low-power input, the

SPI and UART options, and the easy programmability. The MSP430 is used to control the measurement circuit and the Bluetooth board. The

Smartphone sends a code to the Bluetooth board and the microcontroller is informed and starts the measurement process. The microcontroller then

receives the testing data and tells the Bluetooth board to send the results back to the smartphone. This project is possible because of the

microcontroller.

2.) TPS77301 The device is powered by a rechargeable battery that can have more voltage than required. The microcontroller only needs 3.3V for

typical operation and the battery can supply more than that. The Blood Glucose Meter uses the TPS77301 to insure that the input voltage to the

microcontroller will be at close to 3.3V no matter what the battery voltage level is at. The example circuit given in this parts datasheet allows two

resistors to set the voltage level at 3.3V. This project relies on the TPS77301 to provide the correct amount of voltage to the microcontroller so that

the voltage level does not exceed the maximum input level.

3.) OPA378 This project uses two op amps for the measurement circuit. The op amps are crucial in the measurement circuit since they make sure

that the voltage level of one op amp output is the same as the microcontroller controlled output voltage. Using the op amp allows the voltages to be

controlled and not affected by changes in the currents. The OPA378 is important for the Blood Glucose Meter because it assures that the

measurements will be more accurate.

4.) TLV5636 The measurement circuit requires a known signal to be sent into the electrodes. The signal will be passed through chemical reaction of

the blood and the test strip and then the data out can be processed. The signal can be created by a digital to analog (DAC) converter. This project

uses TIs TLV5636. The microcontroller has an analog to digital (ADC), which will be used to transform the data back to digital, but does not have the

DAC built in. The TLV5636 is useful for this project to create a signal for the measurement circuit.

5.) CC2560 The microcontroller is made to link with the PAN1315ETU Bluetooth board, which uses TIs CC2560 all in one Bluetooth solution. The

smartphone receives data from the Bluetooth 2.1 protocol and the PAN1316 sends that protocol. The Blood Glucose Meter would not be able to send

data via Bluetooth without the CC2560 inside of the PAN1315.


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2. Background Research

Introduction

There are a few glucose meters on the market which can connect to a cellphone yet, there are no devices on the market tailored for smartphones that have the

more popular operating systems; Android, iPhone OS, or Windows Phone 7. This fact reduces their available market share as well as lowers the capabilities of

monitoring systems that can provide both the patient and care provider for a person with diabetes. We specifically looked for devices that are directly applicable

to our project, we focused on fours types of devices; blood glucose meters that could connect to cellphones, blood glucose meters that could connect to

computers, other specialty devices that can connect to smartphones and generic blood glucose meters for comparison. In our search, we were unable to find a

device that would allow for multiple connects to a single smart phone.

-Products- -Measurementtype-

-Deviceconnectedto-

-ConnectionType-

-ProgramUsed-

-ProgramType-

-DataPath-

-OnMarket(Cost)-

-Size/Portability- -Type ofPower-

-TimeCharged(estimated)-

iBGStar [1] blood glucose iPhone directly pluginto iPhone

iBGStarDiabetesManager App

ApplesiOSplatform

USB notreleased

56 x 24 x 10 mm internalbatterypoweredchargedfrom iPhonebattery

less thaniPhonebattery (6hrs)

Jazz meter [2] blood glucose iPhone cord attachesiphone todevice

TheWaveSenseDiabetesManager app

ApplesiOSplatform

USB Jazzmeter$49.88,cable(notreleased)$30.00

1.81"x 3.27"x0.79"

internalbatterypowered

less thaniPhonebattery 6 hrs

Glucophone[3]

blood glucose certaincellphones

attached tophone

HealthPiawebsite

cellphone'sinternet

USB StarterKit$79.95

size of cell phonecase

cell phonebattery

less than cellphone battery

Ultrasoundsmartphone[4]

ultrasound smartphone cord attachesto phone

N/A N/A USB notrealeased

about 1" diameterand 3" long

cell phonebattery

less than cellphone battery

BluetoothBlood PressureMonitor [5]

blood pressure cell phoneor PDA

wireless N/A ShortMessageService

bluetooth N/A 70 x 80 x 25 mm 2 AAA(1.5V)

N/A

Contour USBMeter [6]

blood glucose computer directconnect withUSB

GlucofactsDeluxe

N/A USB $74.99 3.75" x 1.25" rechargeablebattery bywall chargeror computer

N/A

MyGlucoHealthMeter [7]

blood glucose sendsinformationonline or tophysician

wireless MyGlucoHealth N/A bluetooth/USB

$89.95 larger than cellphone

battery over 1 year

Glucocard 01Mini [8]

blood glucose notconnected

LCD display N/A user keepslog book

N/A $18.71 3.6" x 1.2" x 0.5" lithiumCR2032battery

lastsapproximately3,000 tests

OneTouchUltraSmart [9]

blood glucose notconnected

LCD display N/A electroniclog bookwithgraphs

N/A $74.65 3.8" x 2.3" x 0.9" 2 AAA(1.5V)

6-12 months

AndroidBluetoothOscilloscope[10]

plotting ofwaveforms

smartphone wireless Bluetooth Chat N/A LMX9838bluetoothSPP

notreleased

about size of acellphone

3V (notspecified)

N/A

Cellphone and Smartphone Enabled Blood Glucose Measurement Devices

The Glucophone can connect to a variety of cellphones, mainly LG and Motorola phones, with different iterations [3]. These iterations either attach to the phone

as a case or plug directly into the connector on the bottom of the phone. Also, there is the MyGlucoHealth Meter which can connect to Nokia phones via

Bluetooth or PCs via USB [7]. Currently, the WaveSense Jazz meter can connect to a PC and in the future, the Jazz meter will use a 30 pin cable, which will be

sold seperately, to connect to the Apple iPhone [2]. The iBGStar will be launching sometime during 2011 in select countries [1]. The iBGStar will work with

Apple iPhones and along with the Jazz meter will use proprietary software to track glucose measurements. The iBGStar is a much smaller device than the Jazz or

MyGlucoHeath meters and connects directly into the 30 pin connector on the bottom of the iPhone. All of these devices have a LCD to display glucose

measurements except for the Glucophone. The iBGStar and Jazz meter have internal batteries to power the device while the Glucophone uses power from the

smartphone. The iBGStar and Jazz meter both will utilize dynamic electrochemistry to promise high accuracy. All these devices cost between $70 and $90.

USB Glucose Meters

There are other similar meters to the WaveSense Jazz and MyGlucoHealth meters that can connect to a Mac or PC via USB; one of these meters is the Bayer

Contour USB Meter. The Contour USB Meter uses plug and play management to connect directly to a PC and upload data to their proprietary software, Glucofacts

[6]. The Contour has a separate LCD display and an internal battery that is recharged through the USB. It is also able to track 2000 measurements on the

device.

Other Smartphone Specialty Devices

As well as blood glucose meters, there are also other medical devices that have been developed for use with smartphones. An ultrasound wand has been

developed for use with Windows Mobile that connects through USB. This device has been tailored for use in third world countries where medical devices are


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difficult to come by [4]. Currently, the Ultrasound wand has not been released and is aiming for a pricetag of $500. The bluetooth enabled blood pressure

monitor allows care takers to wirelessly monitor patients from a distance [5]. Users can also upload their measurements to their PDA. A recent project that has

similar applications to ours is a wireless bluetooth oscilloscope for Android phones [10]. This project used a two differential amplifiers, a microcontroller and a

bluetooth transmitter to take measurements and transmit them to the smartphone.

Other Blood Glucose Meters

There are numerous generic blood glucose meters that simply display the glucose levels and do not have the capabilities to store the information in other

locations. Some, such as the OneTouch Ultrasmart can store many measurements and display that information graphically on the its LCD screen [8]. Others,

such as the Glucocard 01 Mini, require the user to keep track of the measurement results [9]. The Glucocard also has optional personalized faceplates. Both of

this are designed to be quick and easy to use. The OneTouch Ultrasmart costs $75 and the Glucocard 01 mini costs $15.

-Blood Glucose Products- -Sample Size- -Test Time- -Strips-

Glucophone 3 microliters 9 secs GlucoPack Blood

Contour USB Meter 0.6 microliters 5 secs Contour

Jazz meter 0.5 microliters 6 secs Jazz Test Strips

iBGStar 0.5 microliters 6 secs N/A

MyGlucoHealth Meter 0.3 microliters 3 secs MyGlucoHealth

Glucocard 01 Mini 0.3 microliters 7 secs Glucocard 01-Mini

OneTouch UltraSmart 1.0 microliters 5 secs Ultras

Conclusion

There are many products that can take blood glucose or other medical measurements, however there aren't any that can wirelessly upload the data to any smart

phone. Ultimately, there is a need for a blood glucose meter that can connect to any smartphone wirelessly and upload information to a downloaded application.

The user will not have to keep track of extra wires and having a rechargable product will allow customers to not have to buy common batteries. All of this fueled

by a comprehensive and detailed application that helps monitor and alert the user will provide a more complete medical solution to dealing with diabetes. Due

to high prices of medical care, preventative care can help lower the cost of living. Couple that fact with the ability to track and transfer information about current

health conditions to a care provider and a single device can help people with chronic diseases live a happier better life.

[1]. http://ibgstar.com/web/ibgstar

[2]. http://www.wavesense.info/wavesense-jazz

[3]. https://my.glucophone.com/

[4]. http://www.genesis-ultrasound.com/Ultrasound-smartphone.html

[5]. http://mytech-tel.en.alibaba.com/product/200720716-200413478/Bluetooth_Blood_Pressure_Monitor.html

[6]. http://www.bayercontourusb.us/

[7]. http://www.myglucohealth.net/

[8]. http://www.glucocardusa.com/mini.html

[9]. http://www.onetouchdiabetes.com/ultrasmart

[10]. http://projectproto.blogspot.com/2010/09/android-bluetooth-oscilloscope.html

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3. System Requirements

Requirement Name: Blood Glucose Meter RequirementWeight:20/100

Customer Requirement:

There must be the capability to measure blood glucose levels. The customer will be able to use asmall sample to test their current blood glucose levels.

Date Approved:2010-10-20 15:58:35

Engineering Requirement:

Must have a blood glucose meter that can either connect directly to a smartphone or through adevice hub. The meter must meet accuracy requirements of FDA and must complete the test inunder 15 seconds.

Requirement Name: Case RequirementWeight:10/100

Customer Requirement:Modern products, like smartphones, have sleek cases that are easy to use and look stylish. Currentproducts have to match their styles in order to compete in the market today. The customer willwant something modern, easy to store, durable, small enough and light to carry.

Date Approved:2010-12-01 17:08:20


There needs to be a case either metal or plastic that can be less than 300 mm (L) X 100 mm (W)X 50 mm (T)

Requirement Name: Conserves Power RequirementWeight:10/100

Customer Requirement:The device must not waste power when not in use. Customers will save time and money by havinga product that will conserve power in between uses.

Date Approved:2010-11-01 11:52:00

Engineering Requirement:The device must be capable of shutting down automatically after 5 minutes of no inputs and musthave a manual on/off switch.

Requirement Name: PCB Charge Circuit and Power Management RequirementWeight:/100


The device needs to be about the same size as a smartphone. The device also needs to be easilyreplicated. The best way to accomplish this is to custom make a printed circuit board.

Date Approved:2011-04-06 13:39:46


The charge circuit and the power management circuit must be on a PCB.

Requirement Name: PCB the Measurement Circuit RequirementWeight:/100


The device needs to be about the same size as a smartphone. The device also needs to be easilyreplicated. The best way to accomplish this is to custom make a printed circuit board.

Date Approved:2011-04-06 13:40:09


The measurement circuit must be on a printed circuit board. The output measurement signal mustcome from the printed circuit board.

Requirement Name: PCB the Microcontroller RequirementWeight:/100

Customer Requirement:The device needs to be about the same size as a smartphone. The device also needs to be easilyreplicated. The best way to accomplish this is to custom make a printed circuit board.

Date Approved:2011-04-06 13:40:02

Engineering Requirement:The microcontroller must be on a PCB and the microcontroller must be able to be programmed byconnecting the debugger interface to the PCB.

Requirement Name: Rechargeable RequirementWeight:15/100


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Customer Requirement:The customer will need to be able to easily recharge the device. Having a rechargeable battery willincrease the portability of the device. The customer will save money by using a rechargeablebattery instead of consistently buying standard batteries.

Date Approved:2010-11-01 11:52:48


We will need a battery charger that uses USB power and/or add the capability to recharge thebattery via the smartphone. The battery will fully charge after 2 hours.

Requirement Name: Self Powered RequirementWeight:10/100


The device must be capable of making measurements without being connected to the smartphone.The customer might not have their smartphone at the time that they take their blood glucosemeasurements, therefore the device should be able to work properly without the presence of asmartphone.

Date Approved:2010-12-01 17:09:42


The system must be powered by a battery and have a lifetime of at least 6 hours per charge instandby mode.

Requirement Name: Smaller Case RequirementWeight:/100

Customer Requirement:The device should be about the same size as a smartphone so that it can be easy to carry around.

Date Approved:2011-04-06 13:40:20


The case must be smaller than 100mm x 60mm x 50mm.

Requirement Name: Software RequirementWeight:20/100


There needs to be a method to at least track blood glucose measurements and store them on asmartphone for further review. The measurements for customers will be more useful if they cantrack their individual measurements and be able to access them later on. The device will beconvenient for customers to bring to doctor appointments.

Date Approved:2010-11-07 14:57:27


The software includes a system for tracking measurements, making alerts to the user, anduploading the information to an online database. The software will be able to hold data for 1000measurements on the smartphone.

Requirement Name: Use Indicator Light RequirementWeight:/100


The device should be able to indicate to the user that it is working without the user needing to lookat the smartphone. The best way to do this would be with an indicator light.

Date Approved:2011-04-06 13:40:14


The device must incorporate at least one LED powered by the device.

Requirement Name: Wireless RequirementWeight:15/100


The device must be easily accessible to the smartphone. Customers will find it convenient to havetheir glucose meter be able to connect and store information on their personal phone. A wirelessconnection will provide easy uploading without storing and using extra wires.

Date Approved:2010-11-12 15:36:13

Engineering Requirement:The device must be recognized by the smartphone, form a successful connection, and send datameasurements to the smartphone. That information must be able to be accessed by our third partysoftware.

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4. Design Solutions

Design 1: Bluetooth Enabled Blood Glucose Meter Embedded Case Design

The primary aspect of this design is that the Blood Glucose Meter would be physically part of the smartphones protective case and transfer data with

the smartphone via Bluetooth. This would allow for a number of engineering and business advantages. First, it allows for multiple methods of

implanting a blood glucose measurement circuit. In this design, the meter will measure blood glucose levels using cyclic voltammetry. The analysis

of the data collected can either be done on the smartphone itself or a microcontroller located in the meter. Also, this design does not require another

LCD display for the meter thus enabling lower power and cost.

Microcontroller Method: In this embodiment, a microcontroller will control the cyclic voltammetry measurement as well as take the data collected

from the measurement and then calculate the blood glucose levels. That data would then be sent to a smartphone through a Bluetooth connection

module. The smartphone would then be able to track the data and perform long term trending analysis.

To implement the microcontroller design we would use a TI MSP430 which is a mixed signal microcontroller [1]. First of all, using the MSP430 would

alleviate some of the measurement necessary to perform cyclic voltammetry. Also, the MSP430 has a standby mode which could allow for activation

of the meter from the smartphone as long as the Bluetooth connection stays active. Using the MSP430 would also allow for seamless integration with

the TI CC2560, which is an all-in-one Bluetooth solution. These two chips would control the bulk of the processes on the device itself, the other

circuitry required would be a power supply, battery charger, power management circuit, and circuitry to help implement the blood glucose

measurement. By using the MSP430 could also implement a USB connection so that the device could also interact with a computer allowing for

software updates.

Pros:

- Could be developed to be used with multiple smartphone

- Will be a unique and sleek design that can physically attach to the smartphone seamlessly

- Would be developing on a platform that was created for similar processes

Cons:

- Heavily depending on high and low level coding

- Will not have a separate LCD display

Smartphone Analysis Method:

This embodiment requires the smartphone to analyze the cyclic voltammetry data and calculate the blood glucose levels. The input signal to the

sample would be generated by a completely separate control circuit that would then send the output signal to an all-in-one Bluetooth connection chip

[2] which would then transfer the signal to the smartphone. Although this design could be an eloquent solution while uniquely using a smartphones

computing power, it creates many engineering difficulties which will have to be solved through electrical design. This can be very costly during

designing but could create a less expensive final product.

Pros:

- Could be developed to be used with multiple smartphone

- Will be a unique and sleek design that can physically attach to the smartphone seamlessly

Cons:

- Heavily depending on high and low level coding

- Will not have a separate LCD display

- Would be developing on a platform that was not created for similar processes

Conclusion:

The advantages of this design is that it is a unique solution to the smartphone capable blood glucose meter. The smartphone analysis method would

be a possible design solution; however, developing on a platform would add unecessary difficultly to the design. By implementing the microcontroller

solution, we will be using a platform that can be quickly designed and then easily altered through coding solutions during the testing. This

embodiment will be the simplest for the customers use and will provide the best possible solution. The final design will be this design with the

microcontroller method.

Design 2: Blood Glucose Meter Directly Attached to Smartphone

The second design includes the medical device connecting to the iPhone via physical connection. The design will be a directly attached device cannot

interfere with any existing iPhone functionality. The device dimensions will be 1.25H x 2.4W x 0.48D. The device will have two concave grooves on

the front and top, to facilitate effective usage of iPhone speaker and microphone.

The device will have a standard glucose test strip reader. The device will not have anything on the right side. For the top side of the device, it will

have concave grooves to facilitate use of existing iPhone speaker and microphone. On the top side of the device there will also be a 30 pin male

connector, which will allow for a direct connection to the iPhone 30 pin female connecter. The device must be able to recharge from the smartphone

through the pins connecters.

Pros:

-The user doesnt need a separate charger for the device. The device will get charged directly from the iPhone.

-The device could be always connected to the iPhone, which is will make it easier for the user to use any time.


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Cons:

-This device can be only used on iPhone.

-The device will not show the measurement results, it have to be through the iPhone.

-This device might add more length to the size of the iPhone.

Conclusion:

This design could be done, but this attached device will be non ideal since it needs specific existing iPhone functionality. That will make the design

exclave for just iPhone, while we can make it work for any Smartphone.

Design 3: Blood Glucose Meter Attached by Wire to Smartphone'

The third design involves the medical device connecting to the smartphone via a cable. This embodiment allows the medical device to be completely

detachable from the smartphone and best represents a smartphone hub. The medical device will be able function completely without the presence of

a smartphone; therefore, the medical device must be able to display results on a LCD screen. Many results will need to be stored in the medical

device until the information can be uploaded to the smartphone. The wire would have a connection type that would fit a certain type or group of

smartphones. For example, the wire would have a 30-pin connector allowing the device to connect to an iPhone. The wire will not be able to connect

to every type of smartphone due to the many different connection types that smartphones use.

The device will be fully functioning without the smartphone; therefore, the smartphone will not be available to do the information processing. The

medical device will need to have a microprocessor to process the information separately before data is sent to the smartphone. The medical device

will have an internal battery supply, completely dependent from the smartphone. The battery will be rechargeable and have a power save feature.

When the medical hub is used as a glucose meter, the user will be able to test the glucose level in their blood by using test strips and the medical

device. The LCD screen will display the current results without being attached to the wire and the smartphone. The glucose meter will need to store

the results until the data can be uploaded. Preferably, the meter will be able to store multiple test results without having to upload the data.

Eventually, the user will use the wire to connect the glucose meter to their smartphone and transfer the information to the specific diabetes

application.

Pros:

-The user can test without a smartphone present

-Transferring the information will be direct and easy

-Multiple devices can be connected

Cons:

-Only the current testing results will be visible directly after a measurement if the device is not connected to the smartphone

-The user will have to keep track of two devices and a wire to connect them

-An extra LCD screen is needed to show instant results

-The wire will only allow certain smartphones to be connected to the medical device

Conclusion:

This embodiment has some good features, such as allowing the user to use their medical device separate from their smart phone and allowing easy

data transferring; however, the cons out way the pros. The final design should be able to more than just one specific variety of smartphones and the

users does not want to keep track of a medical device, a smartphone, and the wire to connect them together. Overall, this embodiment would be

completely possible and would solve some design issues, but would not be the most practical approach to the final product.

[1]. http://focus.ti.com/docs/prod/folders/print/msp430bt5190.html

[2]. http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?contentId=29992&navigationId=12761&templateId=6123

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5. Top Level Block Design

- - - - - Signal Name - - - - - - - - - - Type - - - - - - - - - - Properties- - - - -

VMAIN Electrical 3.3V DC +-5%Max Current: 9.5 mA

VUSB Electrical 5V DC + - 5%Max Current: 500mA + -5%

Charge Signal Electrical 3.3V DC + - 5%Enable: The charge cricuit is running.Disable: The charge circuit is not running.

Power Signal Electrical 3.3V DCEnable: Powers system with battery powerDisable: The Power Supply is not connected to the Battery Terminals

VBAT Electrical 3.6V DC + - 5%

Cyclic Voltammetry Signal Electrical 3.3Vp-to-p AC @ ~200HzApplied test voltage to BG test strip

UART Electrical Clk Speed: 32.76kHz3.3V DC

SmartPhone Display Electrical Displays measurement results to user

Bluetooth Protocol Electrical Bluetooth 2.1 Protocol Compliant10.5 dBm

High Code Download Electrical Program: Visual Studio

low code download Electrical/Control Programming: CTI USB programmer JTAG

VCHARGE Electrical 3.6V DC + - 5%Max Current: 500mA + - 5%

Data Signal Electrical 3Vp-to-p AC @ ~200Hz20mA MaxMeasured electrochemical voltage from BGSPI 32.76KHzSupplied input for DAC

Blood Sample Environmental Human Blood Sample or Calibration SampleTemperature: 95F to 105F

User Input Environmental

Environment Environmental -0F to +100FHumidity: 0% to 100%Day to day use of a cellphone

Attachments

toplevelblock_2.jpg (40.4 kB) - added by koskok on 12/06/10 14:50:34.

Block Level Diagram.jpg (59.3 kB) - added by koskok on 03/06/11 17:34:30.


TopLevelBlockDesign - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/TopLevelB...

1 of 1 5/15/2011 8:56 PM

5.1 Power Supply

Responsible Party: Hebah Hasan

Introduction

A power supply is a device that supplies electrical energy to one or more electric loads. The term is most commonly applied to devices that convert

one form of electrical energy to another, though it may also refer to devices that convert another form of energy to electrical energy.

Every electronic circuit is designed to operate off of some supply voltage, which is usually assumed to be constant. A voltage regulator provides this

constant DC output voltage and contains circuitry that continuously holds the output voltage at the design value regardless of changes in load current

or input voltage. [1]

The adjustment voltage regulator circuit is performed by constructing a potential divider with its ends between the regulator output and ground, and

its centre-tap connected to the 'adjust' terminal of the regulator. [2]

For our design, we will be using a linear technology manufactures a broad line of high performance low dropout linear regulators (LDO). These LDOs

offer very low dropout, fast transient response, excellent line and load regulation, and have a very wide input voltage range, from 0.9V to 80V.

Output currents range from 100mA to 10A, with positive, negative and multiple outputs. We will be using the TPS77301 chip in our design.

5.1.1: Block Diagram

5.1.2: Interface Definition

- - - Signal Name - - - - - - Type - - - - - - Properties- - -

VBAT Electrical Input 3.6 V DC + - 5%

VMAIN Electrical Output 3.3V DC +-5%Max Current: 9.5 mA

5.1.3: Design

Power Supply Schematic

" Figure: Power Supply Schematic [3]"


PowerSupply - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/PowerSupply

1 of 3 5/15/2011 9:00 PM

" Figure: Power Supply Build Image [3]"

5.1.4: Validation

The TPS77301chip is low-dropout regulators with integrated power-on reset and power good (PG) function respectively. This device is capable of

supplying 250 mA of output current with a dropout of 200 mV. Quiescent current is 92 uA at full load dropping down to 1 uA when device is

disabled. This chip is optimized to be stable with a wide range of output capacitors including low ESR ceramic (10 uF) or low capacitance (1 uF)

tantalum capacitors. TPS77301 is designed to have fast transient response for larger load current changes. [3]

The input voltage 3.6V will be from the battery. The resister values will be:

R1 = 53.8 k

R2 = 30.1 k

We will get 3.3V DC output voltage.

5.1.5: Test to Complete

We need to test the output of the power supply (VMAIN). The output of the power supply will be powering the micro controller with 3.3 V and a

current value of 6.75mA.

In order to test this block, we need to have input voltage of 3.6 V and we will be measuring the output voltage and it should be 3.3 +/- 5% V. We

will be also measuring the output current by connecting a load (resister= 470 ) to the output and measure the output current and it should be =

6.75 +/- 5 mA.

Proof of test:

The test started by supplying an input of 3.6 V to the power supply circuit. Then we measured the voltage across the output of the power supply,

which was = 3.36 V as it shows in Figuer1.

Then we changed the input voltage to test the output when its below 3.6 V, so we supplied a voltage of 2.9 V and we measured the output voltage

and it was = 2.99 V as it shows in Figuer2.

Finally we changed the input voltage to test the output when its above 3.6 V, so we supplied a voltage of 4 V and we measured the output voltage

and it was = 2.37 V as it shows in Figuer3.

For the current measurement, we need the output current = 6.75 m A, so we connected a load(resister with value 470 ) and we got output current

= 6.8 mA as it shows in Figure4.

Figuer1

Figuer2


2 of 3 5/15/2011 9:00 PM

Figuer3

Figuer4

5.1.6: Budget

Part # Name Quantity Description Suppler Availability Cost Total Cost

Resistor [4] 54.9K 3 RES 54.9K OHM METAL FILM .50W 1% digikey Yes $0.23 $0.69

Resistor [5] 30.1K 3 RES 30.1K OHM METAL FILM .50W 1% digikey Yes $0.23 $0.69

Resistor [6] 249 3 RES MF 1/4W 249 OHM 1% AXIAL digikey Yes $0.15 $0.45

Capacitor [7] 0.1 F 3 CAPACITOR METAL FILM, 0.1F newark Yes $0.199 $0.597

Capacitor [8] 10 F 1 CAP 10UF 63V METAL POLY digikey Yes $3.52 $3.52

77C1213 [9] TPS77301DGK 1 IC ADJ LDO REG 1.5V TO 5.5V, 250mA MSOP-8 newark Yes $2.19 $2.19

Grand Total $8.137

5.1.7: Reference

[1]: http://en.wikipedia.org/wiki/Power_supply

[2]: http://en.wikipedia.org/wiki/Linear_regulator

[3]: http://focus.ti.com/lit/ds/symlink/tps77301.pdf

[4]: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=PPC54.9KXCT-ND

[5]: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=PPC30.1KXCT-ND

[6]: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=RNF14FTD249RCT-ND

[7]: http://www.newark.com/panasonic/ecqe2104jf/capacitor-metal-film-0-1%C2%B5f-250v/dp/32R8825

[8]: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=495-4092-ND

[9]: http://www.newark.com/texas-instruments/tps77301dgk/ic-adj-ldo-reg-1-5v-to-5-5v-250ma/dp/77C1213?CMP=AFC-JY6146109556

Attachments

Power Supply High Level Block Daigram.jpg (14.0 kB) - added by hasanhe on 01/22/11 12:49:43.

Power Supply Schematic.jpg (23.1 kB) - added by hasanhe on 01/22/11 13:03:30.

Power Supply order.pdf (28.3 kB) - added by hasanhe on 01/23/11 13:10:59.

Current measurment.jpg (203.4 kB) - added by hasanhe on 01/31/11 16:03:39.

power supply output at 2.9 V input.jpg (201.3 kB) - added by hasanhe on 01/31/11 16:04:34.

power supply output at 3.6 V input.jpg (177.7 kB) - added by hasanhe on 01/31/11 16:05:42.

power supply output at 4 V input.jpg (208.2 kB) - added by hasanhe on 01/31/11 16:06:35.

Power supply image.JPG (0.6 MB) - added by hasanhe on 02/06/11 19:13:38.

Power supply powering Micro controller.jpg (0.7 MB) - added by hasanhe on 02/19/11 16:00:59.

Power supply powerd from Battery and its powering the micro controller.jpg (473.6 kB) - added by hasanhe on 02/19/11 16:26:38.


3 of 3 5/15/2011 9:00 PM

5.2 Battery


Introduction

A rechargeable battery or storage battery is a group of one or more electrochemical cells. They are known as secondary cells because their

electrochemical reactions are electrically reversible. Rechargeable batteries come in many different shapes and sizes, ranging anything from a button

cell to megawatt systems connected to stabilize an electrical distribution network. Several different combinations of chemicals are commonly used,

including: lead-acid, nickel cadmium (NiCd), nickel metal hydride (NiMH), lithium ion (Li-ion), and lithium ion polymer (Li-ion polymer).

Rechargeable batteries have lower total cost of use and environmental impact than disposable batteries. Some rechargeable battery types are

available in the same sizes as disposable types. Rechargeable batteries have higher initial cost, but can be recharged very cheaply and used many

times. [1]

There are several different type of rechargeable battery. According to our requirements, the size and efficiency will go with nickel metal hydride

(NiMH) for our design.




VCHARGE Electrical Input 3.6V DC + - 5%Max Current: 500mA + - 5%

VBAT Electrical Output 3.6V DC + - 5%

5.2.3: Design

Figure1: Schematic

Figure2: NiMH cells in series. [2]


Battery - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/Battery

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Fiuger3: Nickel-metal hydride cells [3]

5.2.4: Validation

!NiMH (nickel-metal hydride cell) battery charger is a type of secondary electrochemical cell. The !NiMH battery uses a hydrogen-absorbing alloy for

the negative electrode. Rechargeable !NiMH AAAs typically weigh 14-15 g. !NiMH cell supply 1.2 V. !NiMH has a typical capacity of 8001250 mAh.

[4]

We will be connecting 3 cells of NiMH battery to get total of 3.6 V, which is will be the input for our power supply. We will be using a new type of

nickel-metal hydride cell, which is reduces self-discharge and therefore lengthens shelf life. By using a new separator, manufacturers claim the cells

retain 70% to 85% of their capacity after one year when stored at 20 C (68 F). These cells are marketed as "hybrid", "ready-to-use" or

"pre-charged" rechargeable. Besides the longer shelf life, they are otherwise similar to normal !NiMH batteries of equivalent capacity and can be

charged in typical !NiMH chargers.

Low self-discharge cells have lower capacity than some standard !NiMH cells due to the larger area of the separator. The highest capacity low-self-

discharge cells have 20002450 mAh and 850 mAh capacities for AA and AAA cells respectively, compared to 2800 mAh and 1000 mAh for

standard AA and AAA cells. However, after only a few weeks of storage, the retained capacity of low-self-discharge batteries often exceeds that of

traditional !NiMH batteries of higher capacity. [5]

5.2.5: Tests to Complete

In our test we need to make sure that the batteries are supplying the right amount of voltage for the output, which is 3.6 V DC +/- 5% to the power

supply circuit.

To test this part if it rechargeable or not, we need to measure the voltage across the battery when its empty and charge it. Then measure the battery

voltage when it is fully charged and it should be 3.6 V DC +/- 5%.

Prove of test:

The test started by measuring an empty battery after we drained all the voltage in it by connecting to a big resister and we took the measurement for

it as it shows in Figure1.

Then we charged the battery using the charging battery circuit and we measured the voltage a cross it after it got done charging and it was 3.64 V as

it shows in Figure 2.

Figuer1

Figuer2

5.2.6: Budget


CDP-CPH-504PR [6] NiMH 3 cells together 1X3-SAAA with PR Connector Replacement Battery Battery mart Yes $9.95 $12.94

Grand Total $12.94

5.2.7 References


2 of 3 5/15/2011 9:01 PM

[1]: http://en.wikipedia.org/wiki/Rechargeable_battery

[2]: http://www.shoppingquarter.com/BatterySpace/buy.php?sku=453257203

[3]: http://www.chem1.com/acad/webtext/elchem/ec6.html

[4]: http://en.wikipedia.org/wiki/AAA_battery

[5]: http://en.wikipedia.org/wiki/Nickel-metal_hydride_battery

[6]: http://www.batterymart.com/p-cdp-cph-504pr.html?utm_source=Google&utm_medium=Base&utm_campaign=ComparisonShopping#tabship

Attachments

Battery Block Diagram.jpg (11.3 kB) - added by hasanhe on 12/05/10 21:17:42.

NiMH Battery-.jpg (13.9 kB) - added by hasanhe on 12/05/10 21:58:05.

Nickel-metal hydride cells.jpg (23.2 kB) - added by hasanhe on 12/05/10 22:09:37.

BATTERY Schematic.png (4.5 kB) - added by hasanhe on 01/22/11 15:47:29.

Battery Order.pdf (19.8 kB) - added by hasanhe on 01/23/11 13:30:37.

Battery with full charge.jpg (164.3 kB) - added by hasanhe on 01/31/11 15:53:16.

Battery with empty charge.jpg (164.8 kB) - added by hasanhe on 01/31/11 15:55:24.


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5.3 Battery Charger


Introduction

A battery charger is a device used to put energy into a secondary cell or (rechargeable) battery by forcing an electric current through it. The charge

current depends upon the technology and capacity of the battery being charged. [1]

We will be using NiMH Charge Controller [2]. The charging voltage is in the range of 1.41.6 V/cell. This type of charging control use fast charging

method. Fast charging a cell involves a very high current and this causes the cell to heat up. When the cell becomes fully charged, the charge-current

is converted to a "gassing" process. The cell has the capability of re-combining the gasses but not at the rate of production during fast charging.

Re-combination of gasses creates a lot of heat and as soon as the cell becomes fully charged, it heats up considerably. This characteristic can be

detected to turn off the charger.

No cell likes to be fast charged and there is some limitation to the life of a cell that has been repeatedly fast charged. [3]




VCHARGE Electrical Output 3.6V DC + -5%Max Current: 500mA + -5%

Charge Signal Electrical Input 3.3V DC + - 5%Enable: The charge cricuit is running.Disable: The charge circuit is not running.

VUSB Electrical Input 5V DC + - 5%Max Current: 500mA + -5%

5.3.3: Design

Figure 1: Pin connection description. [4]


BatteryCharger - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/BatteryCharger

1 of 3 5/15/2011 9:03 PM

Figure 2: Charging Battery Schematic.

Figure 3: Battery Charger Image

5.3.4: Validation

The bq2002 and bq2002/F Fast-Charge ICs are low-cost CMOS battery-charge controllers providing reliable charge termination for both NiCd and

!NiMH battery applications. Controlling a current-limited or constant-current supply allows the bq2002/F to be the basis for a cost-effective

stand-alone or system-integrated charger. The bq2002/F integrates fast charge with optional top-off and pulsed-trickle control in a single IC for

charging one or more NiCd or !NiMH battery cells. Fast charge is initiated on application of the charging supply or battery replacement. For safety,

fast charge is inhibited if the battery temperature and voltage are outside configured limits. Fast charge is terminated by any of the following:

_ Peak voltage detection (PVD)

_ Negative delta voltage (-V)

_ Maximum voltage

_ Maximum temperature

_ Maximum time

After fast charge, the bq2002/F optionally tops-off and pulse-trickles the battery per the pre-configured limits. Fast charge may be inhibited using the

INH pin. The bq2002/F may also be placed in low-standby-power mode to reduce system power consumption. The bq2002F differs from the bq2002

only in that a slightly different set of fast-charge and top-off time limits is available. [4]

To Find the value of RB1 and RB2, we will use the equation: (RB1/RB2) = N -1. We have N = 3 and so RB1=600k ; RB2= 300k ; R3 = 75 and

R4 = 3.6k .


We need to make sure that the circuit will recharger the battery. In order to test this block, we will be having a 5 V input to the circuit. We will

measure the voltage across the battery before we connected to the circuit and it should be less than 3 V. Then we will connect the battery to the

circuit. When we connect the power the LED should turn on, which is mean its charging. When the LED turns off that means the circuit its done

charging. Then we will measure the voltage across the battery output after the LED goes off and the voltage across the battery should be 3.6 +/- 5V.

Proof of test:

Test starting time: 8:20 pm

Test Ending time: 9:20 pm

The test started by measuring the voltage across the rechargeable battery, which was = 1 V. Then we connected the battery to the charging circuit

and power it using USB cable with 5 V. The LED was on and we measured the voltage across the battery and it start going up. When the battery

reached up to 3.6 V and it got fully charged, the LED in the charging circuit turned off as it shows in the pictures below.

Before the LED turned off:


2 of 3 5/15/2011 9:03 PM

After the LED turned off:

5.3.6: Budget

Part # Name Quantity Description Suppler Availability Cost TotalCost

Resistor [5] 300 k 1 RES 300K OHM METAL FILM .50W 1% Digikey Yes $0.96 $0.96

Resistor [6] 600 k 1 RES 620K OHM METAL FILM .50W 1% Digikey Yes $0.96 $0.96

BQ2002SN[7]

Fast Charge Managementbq2002/F

1 Fast Charge Management NiCD/NiMH 2000mA8-Pin SOIC Tube

AVNET Yes $1.47 $1.47

GrandTotal

$3.39

5.3.7 References

[1]: http://en.wikipedia.org/wiki/Battery_charger#USB-based

[2]: http://focus.ti.com/docs/prod/folders/print/bq2002.html

[3]: http://talkingelectronics.com/projects/ChargingNiMH/ChargingNiMH.html

[4]: http://focus.ti.com/lit/ds/symlink/bq2002.pdf

[5]: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=PPCHF300KCT-ND

[6]: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=PPCHF620KCT-ND

[7]: http://avnetexpress.avnet.com/store/em/EMController?langId=-1&storeId=500201&catalogId=500201&action=products&N=0&mfr=TIS&

term=BQ2002SN

Attachments

Pin connection .jpg (25.8 kB) - added by hasanhe on 12/05/10 22:54:51.

Battery Charger Block Daigram.jpg (16.8 kB) - added by hasanhe on 01/22/11 16:19:10.

Battery Charger order.pdf (28.3 kB) - added by hasanhe on 01/23/11 13:32:17.

LED off.jpg (0.8 MB) - added by hasanhe on 01/31/11 13:41:58.

LED On.jpg (367.9 kB) - added by hasanhe on 01/31/11 13:43:58.

Recharging Image.JPG (0.7 MB) - added by hasanhe on 02/06/11 19:24:08.

ReCharger Schematic.jpg (32.4 kB) - added by hasanhe on 04/15/11 12:52:37.


3 of 3 5/15/2011 9:03 PM

5.4 High Level Controller Code


Introduction

We will be Using Galaxy S Captivate1 phone and so we will be using Android 2.1 platform for it. We will be using Android Development Tools (ADT)

that is a plug in for the Eclipse IDE that is designed to give us a powerful, integrated environment in which to build Android applications.

Android is a software stack for mobile devices that includes an operating system, middleware and key applications. The Android SDK provides the

tools and APIs necessary to begin developing applications on the Android platform using the Java programming language. Android will ship with a set

of core applications including an email client, SMS program, calendar, maps, browser, contacts, and others. All applications are written using the

Java programming language. [5]

Using ADT extends the capabilities of Eclipse and we will be able to set up new Android projects, create an application UI, add components based on

the Android Framework API, debug applications using the Android SDK tools, and even export signed (or unsigned) APKs in order to distribute your

application. Developing in Eclipse with ADT is the fastest way to build Android applications. ADT gives us an incredible boost in developing Android

applications. [5]




High Code Download Electrical Program: Android

5.4.3: Design

High level coding Block Diagram

The high level controller code will be handled using Android development environment. We will be using Android 2.1 Platform. We will be writing the

code in Eclipse software using Java programming language. The high level code applications will be coded and created in Eclipse using Android 2.1

Platform and then it will be transferred to the Smartphone.

Our program will shows in the Application interface. After the user will click on the application itself, the main menu should show up. The user will

have the choice to choose one of the applications on the menu, which they are:

1. Making new Test.

2. Store Data.

3. The user will be able to graph the data.

All the choices will have the choice to back to the main menu and exit choice.

5.4.4: Validation

Since this is a code block, validation is basic since the final system will need to be completed to verify function. We examine that all input and


HighLevelControl - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/HighLevel...

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outputs from the high level controller are included, initialized, and read from within the code.


Since this is a code block, there is not an associated block test. The entire system needs to be built, and the code is tested by performing all of the

system tests. If all system tests pass, the code is assumed to be fully functional. Only long term testing at that point will lead to a better

understanding of what specific bugs may exist.

5.4.6: Budget

There is not a budget associated with this software block.

5.4.7: References

[1]: http://en.wikipedia.org/wiki/Windows_Mobile#Software_development

[2]: http://en.wikipedia.org/wiki/Programming_language

[3]: http://en.wikipedia.org/wiki/High-level_programming_language

[4]: http://en.wikipedia.org/wiki/C%2B%2B

[5]: http://developer.android.com/index.html

[6]: http://developer.android.com/reference/android/app/package-summary.html

Attachments

High level Code Block Diagram.jpg (11.9 kB) - added by hasanhe on 12/06/10 14:42:40.

Test Code.jpg (39.1 kB) - added by hasanhe on 02/20/11 06:57:11.

Applicaation icon.jpg (29.9 kB) - added by hasanhe on 02/20/11 07:00:35.

Test Result.jpg (28.5 kB) - added by hasanhe on 02/20/11 07:02:20.

High Level Bolck Diagram For high level Code.jpg (34.0 kB) - added by hasanhe on 03/07/11 12:25:47.

High Level Code.java (38.7 kB) - added by hasanhe on 03/07/11 15:09:28.

HighLevelControl - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/HighLevel...

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5.5 SmartPhoneResponsible Party: Kim Kosko

The smartphone is the Samsung Galaxy S Captivate. This phone is the perfect choice for a smartphone due to the use of Bluetooth 2.1. The

smartphone must be compatible with the CC2560 bluetooth solution from Texas Instruments, which uses the Bluetooth 2.1+EDR Module.

5.5.1 Block Diagram

5.5.2 Interface Definition


SmartPhone Display Electrical Displays measurement results to user

High Code Download Electrical Program: Java

User Input Environmental

5.5.3 Design Block Diagram

The smartphone is already designed and on the market. No extra circuits or components will be necessary to use the smartphone. We will need to

download code on to the smartphone to allow the user to use the medical application that we create. We also will need to have the phone make a

wireless Bluetooth connection to microcontrollers Bluetooth module.

Fig. 1 Galaxy S Captivate1 [3]

The datasheet [1] describes how to enable the smartphones Bluetooth. These steps show how to turn on the Bluetooth, change the name, and make

the Bluetooth visible:

To access the Bluetooth Settings menu:

1. Touch Settings Wireless and network Bluetooth settings.

2. Verify your Bluetooth is active.

3. Touch the Device name, Visible, and Scan devices fields to set the options.

To change your Bluetooth name:


2. From the Bluetooth settings page, tap Device name.


SmartPhone - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/SmartPhone

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3. Tap the Device name field and enter a new name.

4. Tap OK to complete the rename process.

To make your device visible:


2. From the Bluetooth settings page, tap Visible.

Making your device visible allows it to be detected by other devices for pairing and communication

The steps, from the datasheet [1], to creating a Bluetooth partnership with a device to the smartphone are described below. Also shown is how to

disconnect a paired device:

Pairing Bluetooth Devices:

The Bluetooth pairing process allows you to establish trusted connections between your device and another Bluetooth device. When you pair devices,

they share a passkey, allowing for fast, secure connections while bypassing the discovery and authentication process.

To pair your device with another Bluetooth device:


2. Tap Scan devices. Your device will display a list of discovered in-range Bluetooth devices.

3. Tap a device from the list to initiate pairing.

4. Enter the passkey or PIN code, if needed, and tap OK.

5. The external device will then have to also accept the connection and enter your devices PIN code.

To disconnect a paired device:

Disconnecting a paired device breaks the connection between the device and your phone, but retains the knowledge of the pairing. At a later point

when you wish to reconnect the device, there is no need to setup the connection information again.


2. From the Bluetooth settings page, touch the previously paired device (from the bottom of the page).

3. Tap OK to confirm disconnection.

or

From the Bluetooth settings page, touch and hold the

name of the previously paired device, and select Disconnect.

To get the software downloaded on the smartphone. This is for if the product is on the market and the customers need to be able to download the

application that we create for the phone. We can submit our software to a free application download website like [4]. Then any Galaxy user can

download the free application and be able to use it along with our medical device. For testing and setting up our prototype and final design, we will

use the phone the synchronize to a computer to get our program on to the smartphone. The steps to do this are also found one the smartphone's

datasheet [1]. The data sheet says the following about PC connections:

PC Connections

You can connect you device to a PC using an optional PC data cable using various USB connection modes. When you connect the device to a PC, you

can synchronize files with Windows Media Player, transfer data to and from your device directly, or use the Samsung Kies program and use you

device as a wireless modem for a PC.

What is Samsung Kies?

Samsung Kies is a software suite that allows you to search and download applications directly from a PC. The applications are then installed onto a

mobile device when synced with a PC, providing instant back up and peace of mind for application downloads.

To learn more about Samsung Kies and Samsung applications, browse featured applications and download Kies at www.samsungapps.com.

Connecting with Samsung Kies

Ensure that Samsung Kies is installed on your PC. You can download the program from the Samsung website (www.samsungmobile.com).

1. From the Home screen, touch Settings Applications USB settings Samsung Kies.

2. Press to return to the Home screen.

3. Using an optional PC data cable, connect the multifunction jack on your device to a PC.

4. Run Samsung Kies and use wireless connections or copy data and files. Refer to Samsung Kies help for more information.

5.5.4 Validation

The Galaxy S Captivate is a valid smartphone. The Galaxy S Captivate can download Windows Media applications from [4]. Software developers can

upload the programs to the freeware website for the public to download use. This would be useful, since it will allow customers to have access to our

application without having to synchronized to our smartphone.

For using and testing the code on our smartphone, we will use the computer to synchronize to the smartphone. On pages 139 of [1] lists steps for

the smartphone to be synchronized to the computer. This will be necessary to download our code onto the smartphone. The steps are simple and

there are multiple ways that we will be able to try if we run into any difficulties. The phone is known for being able to synchronized with a computer;

therefore, we should have no problems getting our code onto the smartphone.

On page 136-138 of [1] explains that the smartphone can be synchronized to other Bluetooth devices. Following the steps from the datasheet will

allow us to recognize our medical device with the smartphone.

I know that this smartphone will be able to connect to our Bluetooth device.

5.5.5 Tests to Complete

There are no block level tests for the smartphone. Only system level tests.

5.5.6 Budget

Part#

Name Quantity Description Suppler Availability Cost TotalCost

N/A Smartphone 1 Captivate Galaxy S Android Smartphone (Unlocked, AT&TBranded)

Amazon.com[2]

Available $524.99 $524.99


2 of 3 5/15/2011 9:07 PM

GrandTotal

$524.99

5.5.7 References

[1] http://downloadcenter.samsung.com/content/UM/201007/20100730051638609/SGH-i897_ATT-Captivate_English_User_Manual.pdf

[2] http://www.amazon.com/Captivate-Android-Smartphone-Unlocked-Branded/dp/B004BPNPGQ

[3] http://pdadb.net/index.php?m=specs&id=2430&c=samsung_sgh-i897_galaxy_s_captivate

[4] http://www.freewarepocketpc.net/ppc-tag-medic-5-date.html

Attachments

SmartPhone.jpg (6.4 kB) - added by koskok on 11/21/10 19:23:28.

Smartphone pic.jpg (21.4 kB) - added by koskok on 12/01/10 20:47:13.

samsung_captivate.jpg (25.3 kB) - added by koskok on 02/05/11 15:12:28.


3 of 3 5/15/2011 9:07 PM

5.6 Bluetooth ModuleResponsible Party: Kim Kosko

The Bluetooth solution will be the CC2560 from TI. The CC2560 is perfectly compatible with the MSP430BT5190. The PAN1315 used the CC2560 chip

to become the Bluetooth evaluation module kit for the MSP430. The kit includes two PAN1315ETU boards each with a PAN1315 Bluetooth 2.1+EDR

Module. The best solution will be to use the kit, since it has all the set up already done for us. The software is called the MSP430+CC2560 SDK

including the Ethermind Bluetooth stack and SPP.

5.6.1 Block Diagram



VMAIN Electrical 3.3V DC +-5%Max Current: 250mA


Bluetooth Protocol Electrical Bluetooth 2.1 Protocol Compliant10.5 dBm


The PAN1315ETU is designed to be easy to use. The board already comes assembled with the circuits ready to use. The PAN1315 is programmed

from the microcontroller. The only set up will be to connect the correct inputs to the board and it will be ready to use.

The PAN1315ETU is shown in the picture below:

The main component of the PAN1315ETU is Panasonic's new PAN1315 Host Controlled Interface (HCI) Bluetooth RF module [2]. The block diagram of

the PAN1315 is shown below:

The specifications of the PAN1315 are given in the cart below [2]:


BluetoothModule - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/Bluetooth...

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The core of the PAN1315 is the CC2560 all in one Bluetooth module [4]. The block diagram for this solution is shown below.

The PAN1315ETU will be connected to the microcontroller in the following way:

5.6.4 Validation

The PAN1315ETU is a board that already incorporates the PAN1315. The board is designed so we can just plug in VMAIN and the other inputs without

having to add any other circuit components. The CC2560 is Commercially licensed to the MindTree Ethermind Bluetooth Stack for the MSP430. The

microcontroller we choose, will only work with this Bluetooth solution.

The PAN1315ETU is made to use with the MSP430 according to [1] and [2]. The Texas Instruments website [1] states that the PAN1315ETU will also

need the MSP430BT5190 and the USB Debugging Interface, which is the JTAG programmer. The microcontroller block shows that we are ordering

both of those requirements.

The wiki site for how to use the PAN1315ETU has an example of how the PAN1315 is used [4]. They create a computer game and use the PAN1315 to

turn the MSP430 into a microcontroller. This tells me that the PAN1315 will be able to connect to the MSP430.


1. Connect VMAIN at 3.3V to the PAN1315

2. Check LED to verify the board has power

3. Go on the computer and see if the computer can verify our Bluetooth device renamed to Project 20 -

4. Have the computer pair with our device

PASS: LED lights up, screen shots are available of the renamed device, and the successful pairing

FAIL: LED doesn't light up, screen shots aren't available of the renamed device, and the successful pairing

This picture is the proof that the LED did light up and the board is getting power:

This is the screen shot of the renamed Bluetooth device found on our computer:


2 of 4 5/15/2011 9:08 PM

This is a screen shot showing that the computer paired with our device:

5.6.6 Budget


PAN1315EMK PAN1315 [1] 1 Bluetooth Evaluation Module Kit for MSP430 DigiKey Available $99.00 $99.00

Grand Total $99.00

5.6.7 References

[1] http://focus.ti.com/docs/toolsw/folders/print/pan1315emk.html

[2] http://www.panasonic.com/industrial/electronic-components/rf-modules/bluetooth/pan1315-ti.aspx?cm_mmc=PIC-_-Alias-_-RF_Modules-

_-Bluetooth-PAN1315-TI

[3] http://www.panasonic.com/industrial/includes/pdf/PAN1315_Full-Spec_2010.pdf

[4] http://processors.wiki.ti.com/index.php/PAN1315EMK_User_Guide

[5] http://processors.wiki.ti.com/index.php/EZ430-RF2560

Attachments

PAN1315ETU pic.jpg (122.2 kB) - added by koskok on 12/02/10 00:45:25.

PIN1315 block pic.jpg (15.9 kB) - added by koskok on 12/02/10 00:52:37.

specifications pic.jpg (26.7 kB) - added by koskok on 12/02/10 00:59:38.

CC2560 block pic.jpg (20.3 kB) - added by koskok on 12/02/10 01:06:15.

bluetooth connections.jpg (39.1 kB) - added by koskok on 12/04/10 21:04:33.


3 of 4 5/15/2011 9:08 PM

bluetooth.jpg (10.4 kB) - added by koskok on 12/06/10 14:10:22.



4 of 4 5/15/2011 9:08 PM

5.7 MicroControllerResponsible Party: Kim Kosko

The microcontroller will control the actions of all the different circuits, making it very important. The measurement circuit will require the

microcontroller to handle mixed signals. The microcontroller that was chosen is the MSP430BT5190. The main reason for the selection is due to the

microcontrollers compatibility with the CC2560 bluetooth solution.

The MSP430 has multiple low-power modes and is optimized to obtain a long battery life. The mircrocontroller has a 16-bit RISC CPU with

16-registers. The device can wake up from low-power modes quickly.

5.7.1 Block Diagram



VMAIN Electrical 3.3V DC +-5%Max Current: 250mA

Charge Level Electrical 0-3.3VDC, 4.8VDC fully charged, 1VDC discharged


Low Code Download Electrical/Control Program: .net

Data Signal Electrical 3Vp-to-p AC @ ~200Hz20mA MaxMeasured electrochemical voltage from BGSPI 32.76KHzSupplied input for DAC


The MSP430 that we choose is a low power solution. Although the microcontroller that we are using has 100-pins and we only need 17 pins and the

programmer connections, the microcontroller will be a good solution for our project. The main reason is that the Bluetooth stack protocol for our

Bluetooth solution is only licensed to be used by this microcontroller.

The programmer for the microcontroller is called JTAG. We will need to separately purchase the MSP430 USB Debugging Interface, however the

coding and downloading will be simple.

The microcontroller that we are using will be contained on a PCB that we designed. The microcontroller will be attached to the board. The JTAG can

be connected to the PCB directly to program the microcontroller.

The following picture shows the pin out for the microcontroller:

5.7.4 Validation

The microcontroller is already on the market. There is no formal validation. It is compatible with the Bluetooth solution according to [2]. The

microcontroller will be programmed using the JTAG solution as the USB debugging technique. The microcontroller datasheet states that the output for

the general I/O pins output 3.3V; therefore, we designed our system to work with that output. We will be using a UART and a SPI connect to the slow


MicroController - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/MicroContr...

1 of 4 5/15/2011 9:10 PM

clock of the microcontroller. The datasheet states that those values will be correct [1].

The wiki site for TI has a sample program that says how to use the microcontroller with the bluetooth solution for a game controller [7]. This tells

me that the microcontroller will be programmable and that it will work well with our Bluetooth solution.

A picture of the JTAG product is shown below [3]. This shows that the microcontroller will be able to connect to the computers USB port using the

JTAG system. This will allow us to write code in C on the computer and download it to the microcontroller. The picture proves that the JTAG

programmer is made to work with the target board that we are using:


LED test:

1. Connect the JTAG programmer to the mircocontroller's target board

2. Add power to Vin using 3.3V VMAIN using the JTAG programmer

3. Download code on to microcontroller

4. Check that VMAIN has 3.3V

5. Check that pin98 has is outputing enough voltage to light up our LEDs (1V-3V)

PASS: 4 and 5 are verified

FAIL: 4 and are not verified

Bluetooth test:

1. Connect the JTAG programmer to the mircocontroller's target board

2. Add power to Vin using 3.3V VMAIN using the JTAG programmer

3. Download code on to microcontroller

4. Check the output of the clock to verify the clock is working

5. Verify the Bluetooth can be discovered by the computer by pairing with our renamed device (named Project 20-)

PASS: 4 and 5 are verified

FAIL: 4 and 5 are not verified

These images show that the LED lighting up with the correct voltage supplied:

These images show proof that the microcontroller can communicate with the bluetooth; therefore the UART is correct:


2 of 4 5/15/2011 9:10 PM

This is the clock signal from the oscilloscope:

5.7.6 Budget

Part # Name Quantity Description Suppler Availability Cost TotalCost

MSP430F5438 [2] Mixed Signal Microcontroller 1 MSP430 Microcontroller TexasInstruments

Available SamplesOnly

$0

MSP-FET430UIF[3]

MSP430 USB DebuggingInterface

1 Software forprogramming

TexasInstruments

Available $99.00 $99.00

Grand Total $99.00

5.7.7 References

[1] http://focus.ti.com/lit/ds/symlink/msp430bt5190.pdf

[2] http://focus.ti.com/docs/prod/folders/print/msp430f5438.html

[3] http://focus.ti.com/docs/toolsw/folders/print/msp-fet430uif.html

[4] http://processors.wiki.ti.com/index.php/JTAG_%28MSP430%29

[5] http://focus.ti.com/docs/toolsw/folders/print/msp-ts430pz5x100.html

[6] http://focus.ti.com/lit/ug/slau278e/slau278e.pdf

[7] http://processors.wiki.ti.com/index.php/PAN1315EMK_User_Guide

[8] http://www.cizgi-tagem.org/resource/vfiles/tagem/dms_file/3457/slau208.pdf

[9] http://processors.wiki.ti.com/images/6/6f/MSP430BT5190_CC2560_Developers_Guide.pdf


3 of 4 5/15/2011 9:10 PM

Attachments

TS430PZ5x100.jpg (72.4 kB) - added by koskok on 12/04/10 22:19:27.

msp-fet430u5x100.jpg (307.2 kB) - added by koskok on 12/05/10 12:41:58.

Sch Target Board.jpg (109.5 kB) - added by koskok on 12/05/10 14:09:54.

TargetBoardLayout.png (219.7 kB) - added by koskok on 12/05/10 14:13:26.

MicroController.jpg (11.4 kB) - added by koskok on 12/06/10 15:00:55.

microblockdiagram.jpg (49.3 kB) - added by koskok on 12/06/10 15:55:55.




clkpic.jpg (146.6 kB) - added by koskok on 01/31/11 15:03:32.


paired_1.2.jpg (57.1 kB) - added by hasanhe on 01/31/11 15:30:05.

paired_2.2.jpg (32.4 kB) - added by hasanhe on 01/31/11 15:30:34.

Schematic_micro.jpg (114.6 kB) - added by koskok on 02/18/11 11:42:55.




4 of 4 5/15/2011 9:10 PM

5.8 Low Level Controller CodeResponsible Party: klarrt

The low level controller code will handle the taking the testing measurements as well as connecting to the smartphone

via bluetooth. It will also control the state of the microcontroller whether goes into standby or wakes up from a user

input. The low level code will have to be able to control the input signal to the measurement circuit and collect the

data from the measurement circuit. That data will then be used to calculate the blood glucose levels from the blood

sample. That information will have to be transferred to the bluetooth module to be sent to the smartphone.

5.8.1 Block Diagram

Figure 1: Low Level Code Block Diagram



low code download Electrical/Control Programming: CTI USB programmer JTAG


The low level code primary function is to open a bluetooth connection with the smartphone and make the blood

glucose measurement. This will be done by first searching for a link partner after powering on or waking up from

standby. If an established link partner is detected the device should automatically connect to that device. If no link

partner is found, the device will continue to for a link partner until one of two user inputs occurs. The first user input

(such as quickly pressing the power button once), will cause the device to become discoverable. After becoming

discoverable, the device will search for a new link partner until it is shut off or finds one. If a link partner is found,

the device will create a connection and the wait for the user to make a command through the smartphone via the

bluetooth stack. The second input (such as quickly pressing the power button twice) will force the device to perform

the test and store the data locally. If a bluetooth link is ever established, there are two possible outcomes. First, the

device is left for 5 minutes without any action and will go to standby mode. Second, there is a command from the

bluetooth stack which will make the device perform the test. The device will the store the calculated data as well as

transmit any data to the smartphone which has yet been sent. During anytime of operation, the status LEDs will be

updated to reflect the battery level, bluetooth connection, and testing progress.

Dashboard My Profile People Groups Projects Request a Project Help!

LowLevelControl - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/LowLevelC...

1 of 3 5/15/2011 9:12 PM

Figure 2: Low Level Code State Diagram

5.8.4 Validation Diagram

Because this is code, the final system will have to be completed to validate design.


2 of 3 5/15/2011 9:12 PM


Besides compiling the code and downloading to the device, there are no block test for this section because the code

will need to be tested at a system level.

This is proof that the code compiles and that the mircrocontroller and communicate with the Bluetooth. I know this

because the computer can recognize our device with the new name of Project 20-:

5.8.6 Budget

There is no budget for this block.

5.8.7 References

Attachments

low code block.jpg (4.8 kB) - added by klarrt on 12/06/10 05:34:46.

low code design.jpg (159.3 kB) - added by klarrt on 12/06/10 14:29:43.


3 of 3 5/15/2011 9:12 PM

5.9 Test StripResponsible Party: klarrt

In order to measure Blood Glucose Levels with electrochemical methods, a blood sample must be placed on a set of electrodes and are referred to as

test strips. Each test strip can only be used once and is different for each meter. We have chosen to use the same test strip as our reference meter in

order to help reduce testing variables as well as lower costs for having to order separate test strips.

5.9.1 Block Diagram

Figure 1: Test Strip Block Diagram



Cyclic Voltammetry Signal Electrical 3.3Vp-to-p AC @ ~200HzApplied test voltage to BG test strip

Blood Sample Environmental Human Blood Sample or Calibration SampleTemperature: 95F to 105F

5.9.3 Design

Figure 2: OneTouch Ultra Test Strip

We have chose the OneTouch Ultra Test Strip for two main reasons. First, the strip uses three electrodes which can offer more accurate testing

results. Second, we have acquired OneTouch Meters which require this strip and we will use these meters to test and compare our device.

5.9.4 Validation

Validation is basic with this block because these test strips are used with the meter that we will be comparing our final device to.


This block will be tested by using the reference meter to acquire a blood glucose level. The other tests for this block will be the same as the test for

the measurement circuit because this block cannot be tested independently.

This is proof that the test strips can be used to take a measurement:

5.9.6 Budget

Part # Name Quantity Description Suppler Cost Total Cost Availability


TestStrips - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/TestStrips

1 of 2 5/15/2011 9:13 PM

N/A Test Strips 1 OneTouch Ultra Blue Test Strips Ultra, UltraTouch, InDuo 100ea. Wallgreens $119.99 $119.99 Yes

Grand Total $119.99

5.9.7 References

The first website explains the definition of a test strip and how it works. Also, it defines the purposes and uses for them. The second link is a PDF

that takes an in depth look at the strip itself, what it is made of, and also shows how the strip interacts with the meter.

http://www.diabetes-diabetic-diet.com/diabetic_test_strip.htm

http://www.liebertonline.com/doi/pdf/10.1089/dia.2008.0005

Attachments

test strip.jpg (25.1 kB) - added by klarrt on 12/02/10 04:42:20.

test strip block.jpg (5.9 kB) - added by klarrt on 12/02/10 04:46:01.

test strip2.jpg (15.1 kB) - added by klarrt on 12/06/10 04:20:47.


TestStrips - Project 20 - Trac http://beaversource.oregonstate.edu/projects/44x201020/wiki/TestStrips

2 of 2 5/15/2011 9:13 PM

5.10 Measurement CircuitResponsible Party: klarrt

The device is required to be able to make accurate Blood Glucose Level (BGL) measurements. There are a few different electrochemical methods to

extract this information from a sample of blood. All of these methods utilize a simplified reaction of Glucose transferring two electrons to two

mediators through use of an enzyme. Then the mediator then transfers the gained electron to an electrode. This process will generate current and is

started by applying an electromagnetic field. The current will be proportional to the amount of electrons transferred and with this information a

concentration of glucose can be derived [1].

5.10.1 Block Diagram

Figure 1: Measurement Circuit Block Diagram



Cyclic Voltammetry Signal Electrical 2Vp-to-p AC @ ~200HzApplied test voltage to BG test strip

Data Signal Electrical ~200mVp-to-p AC @ ~200Hz20mA MaxMeasured electrochemical voltage from BGSPI 32.76KHzSupplied input for DAC

5.10.3 Design

Figure 1: Measurement Circuit Schematic

There are several methods for Electrochemical Analysis to measure BGL such as Cyclic Voltammetry and Chronoamperometry [1]. This circuit is

designed to be used with cyclic voltammetry (CV). Rfb = 51.1kohms Cfb = 47pf R1=R2=51.1kohms U1 & U2 = OPA378

5.10.4 Validation

CV uses an oscillating signal applied to the Auxiliary Electrode (AE) to cause a redox reaction betwee

Glucometer Wireless Design

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