D.H.S. Digijock Home SecurityECE477 – Team 7Linda StefanuttiZach SmithStuart PulliamWill Granger

Software Design Narrative

Overview of DHSSecurity system consisting of 2

remote detection units and 1central monitoring station (CMS)

The CMS has:◦Web server

The Detectors have:◦Noise detection◦Motion sensing◦Smoke detection◦Temperature measuring

Digijock Home Security - Software Design Narrative 2

Central Monitoring System (CMS)Receiving input via USB devicesHosts a web server - Internet

Information Services (IIS)MySQL databaseWill have a program written in

C# which reads data from Xbee and places it in database

Digijock Home Security - Software Design Narrative 3

Detector (Analog-to-Digital)

Peripheral Port Code Status

Noise Detector AN7 Tested

Temperature Sensor

AN6 Tested

Smoke Detector AN5 Written

Battery Charge AN0 Tested

Digijock Home Security - Software Design Narrative 4

Register

Purpose Initial Value

0x8D ATD Input Enable Register - set AN0,5-7 as input

0xE1

0x82 ATD Control Register 2 – enable ATD

0x80

0x83 ATD Control Register 3 – set conversion sequence length to 2

0x10

0x84 ATD Control Register 4 – select nominal sample time

0x85

Detector (SCI)

Digijock Home Security - Software Design Narrative 5

Xbee Port Port

Xbee Data Out TX

Xbee Data In RX

Register

Purpose Initial Value

0xC8 SCI Baud Rate Register High - set baud rate to 9600

0x00

0xC9 SCI Baud Rate Register Low

0x9C

0xCA SCI Control Register 1 0x00

0xCB SCI Control Register 2 - initialize SCI for program-driven operation

0x0C

0x03 Port B Data Direction Register - set PB4 for output

0x10

0x01 Port B Register - assert DRT pin on COM port

0x10

Code Status for Xbee Wireless Module: N/A

Detector (PWM)

Digijock Home Security - Software Design Narrative 6

Peripheral Port Code Status

Speaker PT1 TestedRegiste

rPurpose Initial

Value

0xE0 PWM Enable Register – enable channel 1 0x02

0xE3 PWM Prescale Clock Select Register - set clock t = 24 MHz / 16

0x04

0xE8 PWM Scale A Register - set clock SB scalar to 119

119

0xE1 PWM Polarity Register - set PWM active high 0x02

0xE4 PWM Center Align Enable Register - left-aligned output mode

0

0xE5 PWM Control Register - no concatenation 0

0xF3 PWM Ch.Per. 1 Register - 24MHz/(16*2*119*7) = 900Hz

7

0xF9 PWM Channel Duty 1 Register - set duty cycle = 0%

0

0x247 Module Routing Register - PT1 used as PWM ch 1 output

0x02

0xE2 PWM Clock Select Register – select channel 1 clock

0x02

Detector (SPI)

Digijock Home Security - Software Design Narrative 7

LCD Peripheral

Port LCD Peripheral Port

LCD SCK PM5 LCD RS PM0

LCD MOSI PM4 LCD CLK PT0

LCD R/W PM1

Register

Purpose Initial Value

0xDA SPI Baud Rate Register - initialize baud rate for 6.25MHz

0x01

0xD8 SPI Control Register - transfers most significant bit first

0x50

0xD9 SPI Control Register 2 – normal mode

0x00

0x252 Port M Data Direction Register - set PM0 and PM1 as outputs

0x03

Code Status for LCD: Written

PT0Actually PM4,5

Detector (Digital I/O)

Digijock Home Security - Software Design Narrative 8

Peripheral Port Code Status

LED (Red) PT4 Tested

LED (Green) PT3 Tested

Motion Detector

PT2 Tested

Register Purpose Initial Value

0x242 Port T Data Direction Register - make PT0,1,3,4 outputs (also PT6 for debug purposes)

0x5B

Detector - Main() flowchart

Digijock Home Security - Software Design Narrative 9

Software Hierarchy

Digijock Home Security - Software Design Narrative 10

Questions?

11Digijock Home Security - Software Design Narrative

“The key to wisdom is knowing all the right questions.”

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