SmartThink Remote System Team Cyclops Justin Bewley Winter Jojola Florence Manega Paul 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 continued Driver for the address and data (MC74HC245) latch for the data (MM74C373)

Schematics continued Below 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 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?