ecp2036 assignment 2008

8/2/2019 ECP2036 Assignment 2008

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ECP2036 Microprocessor Systems and Interfacing 1

ECP2036

Microprocessor System &

Interfacing

An 8051-based Garage Door Controller

Assignment3rd Trimester 2007/2008


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General Information

Group project (7-8 students per group)

Total: ~12 groups

Date released: Week 4 Deadline: Week 12

Presentation: Week 13

Mode of Submission:

Garage Door Controller + report

Assessment Marks : 15%


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Objective

The objective of this assignment is to allow students to gain

practical experience in designing an 8051-based hardware

system.

Gain experience of assembly language programming& hardware construction.

Appreciate the importance

of coordinated teamwork

and project management.

Appreciate the nature of systems design


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Project activities

Project activities involve:

Hardware design and construction

C circuit board

DC motor

Push buttons

Switches and sensor

Power supply

Etc


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PresentationA short presentation

(max. 10 min) has to be performed before the demo.

Describe the hardware system and the

program flowchart

Discuss the problems encountered andwhat you have learnt in this project Demonstration (accuracy and speed)** Q&A

Scope of presentation Introduce group members and job distributions

Describe the overall design and your special strategies andfeatures

**some mathematic expressions will be tested on the spot!!


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Report Format(Max. 15 pages, excluding appendix)

1. Project Overview

2. Design Considerations & Schematic Diagrams

3. Algorithm and Flowchart (not the program listing!)

4. Additional features (optional)

5. Conclusion

6. Appendix (program listing,

datasheets, etc.)


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Assessment Scheme

(15 marks)Report Marks: 10 %

Demo Marks: 10 %

Program Marks: 20 %Hardware Marks: 20 %

Effort Marks: 20 %

Result Marks(accuracy+speed) : 20 %

Total: 100 %


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Functional Block Diagram

+ 5 V VoltageRegulator

8051

C

DC motor

Main Supply

P1

P0

Push buttons (up,

down and stop)

Two limit

switches and onephotoelectric

sensor

P2


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Connections for reset and Crystal oscillator

1P1.0 40 VCC

39

0

P0.0 (AD0)2P1.1

3P1.2 38 P0.1 (AD1)

4P1.3 37 P0.2 (AD2)

5P1.4 36 P0.3 (AD3)6P1.5 35 P0.4 (AD4)

7P1.6 34 P0.5 (AD5)

8P1.7 33 P0.6 (AD6)

9RESET 32 P0.7 (AD7)

10(RxD) P3.0

11(TxD) P3.1 30 ALEE

28 P2.7 (A15)14(T0) P3.4 27 P2.6 (A14)

15(T1) P3.5 26 P2.5 (A13)

25 P2.4 (A12)

24 P2.3 (A11)

18XTAL2 23 P2.2 (A10)

19XTAL1 22 P2.1 (A9)

20VSS 21 P2.0 (A8)

12(INT0) P3.2

13(INT1) P3.3

16(WR) P3.6

17(RD) P3.7

29 PSEN

31 EA8051

12MHz

33pF

8K2

Push

Button

100R 10uF

5V

5V


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Design Tip: 9V to 5V

voltage regulation

0.1uF10uF10uF 0.1uF

7 ~ 12V Input

IN4002

7805

1

2

3

+5V, Regulated

7805

Diode Capacitor


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Design Tip: Push Button

(Micro switch)Button + LED

LXBX Button/LED 0 = Pressed/On

A button can be accompanied by a LED indicator.

Schematic Diagram

LX

3mm

LED

BX

P1.X

+5V

8051 C LED Button

1k


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Switches connections

+5V

R1 = 10K

Limit switch 2, LS2

Limit switch 1, LS1

P0.1

P0.0

R2 = 10K

+5V


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Photoelectric sensor

PS1

P0.2


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Relay and motor connections

M

+12V

D1

P2.0 P2.1

R5 = 3.3K R6 = 3.3K

2N3904Or

2N2222

2N3904Or

2N2222

Motor

Relay 1 Relay 2


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END

ecp2036 assignment 2008

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