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Embedded Stroke Evaluation System

Amanda Sweeney, 4ECE

Supervisor: Martin Glavin

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Presentation Overview

• Project Description

• Progress to Date

• Work Remaining

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Project Description

• This project involves the development of an embedded system that will allow an occupational therapist to objectively and accurately measure the severity of stroke suffered by patients in their care

• The system will measure and record pressure, force, position and speed of the wrist action, to allow the therapist to assess the severity of the stroke

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Progress to Date

• Strip Board - Design & Build

• Voltage Regulator Circuit - Design & Build

• Connecting LCD to MPU - IDE cables

• Programming the LCD - To display text

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Printed Circuit Board

• Strip Board Components– 3 FSR’s– 3 83 0hm Resistors– 9V Battery

• The sensors operate as a component of a voltage divider circuit

• The outputs from the circuit are transmitted to an ADUC831 circuit board

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Voltage Regulator Circuit

• A voltage regulator is an electrical regulator designed to automatically maintain a constant voltage level.

1. Input : Unregulated Voltage 2. Ground 3. Output: Regulated voltage

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Connecting LCD to MPU

• IDE cables to connect the pins on the LCD to the MPU made up according to pin assignment in T6963C datasheet

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Programming the LCD …

• After power on it is necessary to drive RST low for a minimum of 2 microseconds to ensure proper reset of the T6963C.

• Initialize LCD

– The controller must then be initialized with a series of commands to set up the various modes and options available to the user.

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… Programming the LCD

• Status Check

– Before every data read, data write or command write the status of the LCD must be checked to ensure that it is ready to communicate with the MPU.

– This means simultaneously checking the status of STA0 and STA1 i.e. D0 and D1 respectively, both of these must be “1” to enable command execution capability and data read/write capability.

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… Programming the LCD …

Data Transmission

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… Programming the LCD

30h, 32h, 25h, 33h, 33h, 35h, 32h, 25h, 1Ah

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Work Remaining …

• ADC

• Serial Communication

• Integrate Keypad and Buzzer

• Position & Speed of Wrist Action

• GUI

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Questions ???