SmartThink Remote System

Team CyclopsJustin BewleyWinter Jojola

Florence ManegaPaul Roberts

Denknesh Temesgen

Introduction

• SmartThink Remote System – Designed for people with disabilities– Aids in performing everyday tasks

• Controls television set

• Controls objects attached to SmartThink adapters  

Conceptual Design

• Infra Red transmission – Line of sight + 10 degrees– Learns Pre-programmed IR codes  

• Incorporates an LED array attached to a target CPU – LEDs correspond to state of FPGA state

machine  

Conceptual Design continued…

• Head mounting– Digital compass

• Imitate head motion

– Inclinometers • Levels; determine vertical angle of sight

Description of working system

• Motherboard– Microcontroller

– FPGA

– Memory

• IR Transmission– Tx / Rx

– Adapter

• Sip/Puff Switch• Button Switch• Software

Overview Block Diagram

Motherboard

Micro-controller Shown below is the MC68HC11, with the clock (8MHz) and reset button

Schematics continuedDriver for the address and data (MC74HC245) latch for the data (MM74C373)

Schematics continuedBelow is the schematics for the ROM and RAM

FPGA - Spartan

State Machine

IR Transmission

IR Reception

• Television Set• Adaptor to go on

other devices, i.e. fan – Regulated by

120Vac.– Processor checks

for IR codes– Relay switches

power flow to peripheral device

Sip/Puff Switch• Origin Instruments, Corporation

• Zero-Power Design, No AC Plug and No Batteries

• The metal switch box contains the devices that

convert sips & puffs to electrical switch closures

• Switch events are accessed from the 1/8"

microphone connectors on the end panel

• Switches are designed for low current electronic loads

• Retail: $295.00

Memory Map

Software Breakdown

• Interrupt from XCS10

• Serial Data Out

• Serial Data In

• Find open slot for data

Interrupt from XCS10

• (State is latched to data bus from XCS10)

• Processor reads in state from data bus• Based on state, read in from

appropriate flash memory preset location (SPI)

• Send data across Serial TX until signal is complete (SCI)

• Send data out serially

Serial Data Out(memory addr. Z)

• For(I = 0; I < IR signal length; I++)– Gather memory byte from Z+I– Send data along serial line

Serial Data In(void)

• For(I = 0; I < IR sig. Len; I++)– Put memory byte from serial line into

location $TEMP+I

• Find open pre-selected data space->Y• If(Y == ERROR)

– Memory space all used up, flash ERROR

– Zero out memory space @ Temp

• Else, move memory from TEMP to Y

Find open data space(void)

• Based on config byte at 0x0000, find open space in memory for new code (0 = mem in use) (1 = mem open)

• If no open space, return ERROR

• If there is an open space, return which space and declare the space used

Parts List

• Motherboard– HC11– Spartan XCS10

• IR– TX-IR (Control chip)– 4MHz (Resonator)– ZTX601 (Darlington circuit)– IR LED (+ 10 deg high power)– TSOP-1140 (IR receiver)– MAX223CPP (DIP-drives voltage to 12V)– PIC 16C84-04 (Controller for adapter)

Parts List Continued

• Switches– Sip / Puff– Buttons

• Misc– Batteries

• 12 Vdc 4Ah NiMH (2)

– Servos• Hitec Hobby Servos (2)

Schedule

Milestone 1

• Boot up HC11

• FPGA Runs Basic Logic

• State Machine Logic Encoded

• Transmitter/Receiver Hardware Built

Milestone 2

• FPGA Debugged and Working

• Read/Write to RAM

• IR Signals Can be Learned

• Switches Interfaced with FPGA

Division of Labor

• Motherboard – Winter, Justin, Denknesh

• IR – Paul, Florence, Justin

• Sip/Puff – Florence, Denknesh

• Boot Code – Paul

• User Manual - Winter

• Technical Reference Manual - Everyone

Questions?