Home Enhancement Suite

Presenter: Allen Humphreys

William Bouchonnet, Daniel Sabo, Nathan Irvin

Summary• Module specific design considerations

and status

• Major software component descriptions

• Hierarchical code organization diagram and descriptions

Updated PSSCs1. An ability to detect a user based on RFID and determine

which user has priority, displaying the user's identity on an LCD.

2. An ability to adjust the light intensity to match a user’s settings through X10 protocol.

3. An ability to adjust a television set or other HDMI device using CEC-HDMI protocol, to a user's preferred settings. (ON/OFF, Channel, Volume)

4. An ability to unlock a door when an acceptable RFID is present.

5. An ability to select/set preferred settings through an embedded web server and the ability to save the "light settings" with the press of a button.

micro

PLIX

RJ-11 PL 513Transmitter

ACOutlet

X10Light ControlPower

Supply+5

RFIDReaders

spi

+3.3

Ambient Light Sensor

ethernetport

ADC

HDMIPortI/O

electricstrike

(door lock)

I/O

LCD

uart

user saveI/O

ethernet

XBeeModule uart

XBeeModule Ext. PHY

National DP8384Q

Updated Block Diagram

Software Design Considerations

• Xbee• UART1

• Receive• Tech considerations• Pseudo-code

• PLIX Chip• SPI1

• Transmit• Researched, pseudo-code

Software Design Considerations

• LCD• UART2

• Transmit only• One wire communication• Simple interface

• RFID Reader• UART5

• Receive Only• One wire communication

Major Software Componenets

• Web Interface• Ethernet

• RMII• Ported from Microchip

• Porting started, not tested

• Consumer Electronics Control (CEC)• Port E – Pin 4

• Tristate register for input/output operation• Network mapping• Conceptualized

CEC Timing

CEC Message Framing

Software Design Narrative

• Organization of Code - Polling• Application requires little user interaction• Simpler to code/debug• Minimal service time requirement

• Overall Progress• Microchip HTTP server setup/porting started• Other modules to be tested individually then

wrapped in

main()

InitializeBoard() InitAppConfig() StackInit() Polling Loop

StackTask() StackApplictions() ReceiveUser()

UpdateDoor() UpdateLights() UpdateTV() UpdateLCD()

InstantSave()

Software Design Narrative

Software Design Narrative

• InitializeBoard()

• UART1

• UART2

• UART5

• SPI1

Software Design Narrative

• InitAppConfig()• Application specific data structure setup

• StackInit()• MAC, TCP, UDP, HTTP initializations

main()

InitializeBoard() InitAppConfig() StackInit() Polling Loop

StackTask() StackApplictions() ReceiveUser()

UpdateDoor() UpdateLights() UpdateTV() UpdateLCD()

InstantSave()

Software Design Narrative

Software Design Narrative

• Polling Loop

• StackTask()• Checks for new incoming packets• Performs timed stack operations

• StackApplications()• HTTPServer() – possibly others

• Acts like an RTOS task• Main application must call this function

repeatedly

Software Design Narrative

• Polling Loop (cont’d)

• ReceiveUser()• UpdateDoor()

• Signal door to switch states

• UpdateLights()• Signal PLIX to adjust lighting

Software Design Narrative

• Polling Loop (cont’d)

• ReceiveUser()• UpdateTV()

• Use CEC functions to set channel/volume

• UpdateLCD()• Display the new current user

Software Design Narrative

• Polling Loop (cont’d)

• InstantSave()• Checks for button press• Saves the current ATD light sensor value

Software Design Narrative

• Other/Misc

• Lights• First use and on command• Set lights to each level, record ATD

value

Questions?