T15- MARKETING SPYSYSTEM MODELING

Document ID: T15_MOD_SYS_V1.0

Version: 1.0

Date: 10/17/2014

Location: https://projects.cecs.pdx.edu/projects/golriz-ece411/wiki

Marketing Spy: level 0

Module Marketing SpyInputs Analog input from the costumers (Picking up the device by

specific distance)

outputs Digital outputs (decimal number on LCD)

Functionality Counts how many times the device has been picked up and calculates the average time

Marketing spyPower, 9V DC

Analog input

Decimal number

Marketing Spy Level 1

Power supply: level 0

Module Power supply

inputs Power:+9V DC (analog)

outputs Power: +5V DC (analog)Maximum current: 1.5A

functionality Convert 9V DC battery Voltage to 5V DC Voltage

power9V DC

Power supply 5V DC

Sensor: level 0

Module Sensor ( infrared )

inputs Operating voltage 5VAnalog input provided by the costumer when they pick up the device from a certain distance (detecting height range 0-50mm)

outputs Digital signal to the microcontroller (when it detects an obstacle and induced voltage above the threshold outputs a high level (3.3V-5V), when no obstacle and induced voltage below the threshold, it outputs 0V.

functionality Every time a costumer picks up the device by a specific distance ( distance is adjustable by potentiometer) the sensor will activate and send a digital signal to the microcontroller

Sensoranalog digital

Microcontroller: level 0

microcontroller Active low signalPower, 5V DC

Cloc

k

sign

al

Increment one

Microcontroller Level 0 Description Table Module microcontrollerInput Operating voltage 1.8V-5.5V

Operating frequency 16 MHz8-bit AVR CPUDigital signal input from sensor to PB0 (timer/counter 1)ISP interface using Atmel Studio 6.2 environment

Outputs Maximum of 200 mW 4-bit digital number of counts4-bit average time

Functionality When microcontroller receives digital signal from the sensor and clock signal it will increment the counter by one and compute the average time and display on LCD

LCD Display Level 0

Module LCD DisplayInput Digital signal from the microcontroller

Maximum current 20 mA Operating voltage 5V DC

Output Digital output, on/off state of segments representing decimal number.

Functionality Control signals from microcontroller drive the segments based on the microcontroller output signals and display the number of count and average time

LCD

Digital signal form microcontroller

Power 5V DCDecimal number

Marketing Spy Flowchart Representation

Activity DiagramGive a alert signal on LCD if t>= 3hour

Invalid time frame

Timer activatedThe sample is picked up

Customer

Count: count up 1. Updates cumulative time then divides by count

Display count and average time on LCD

Ignore the case, keep the previous information on LCD if t < 15s

Valid time frame

Store staff

Present Input

Verify time frame

Error alert

Calculate count and

average time

!pick up

Pick upDrop within 15s

!Drop within 3hrs

Good time frame

Sample back to place

Sate Machine View

Display information