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Microcontroller Applications Lab Project: Controlling Object Movement on Conveyor Belt - P, Study Guides, Projects, Research of Microcomputers

Western Michigan University (WMU)Microcomputers
Prof. Janos L. Grantner

A team project for ece 4510/5530 microcontroller applications course in fall 2008. Students are required to design, build, and demonstrate a system that moves an object on a conveyor belt to a specific end position using a microcontroller. The system includes various peripherals such as start switch, led indicator, buzzer, ir emitter and receiver module, h-bridge motor driver module, and motor encoder module. Students must design the system using the adapt9s12dp512 board and create a c program for the software segment. The project is worth 40 points (10% of the course grade) and is due on november 20, 2008.

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ECE 4510/5530 MICROCONTROLLER APPLICATIONS
Fall 2008
Laboratory Design Project
(Team Project)
Total: 40 pts. (10% of the course grade)
Due 4:00pm, Thursday, November 20, 2008
The theme of the project is to move an object that has been placed on a conveyor belt
from a start position to a specific end position. If it was built, a physical model of the
plant would include the peripherals as follows: a Start Switch, a LED indicator, a Buzzer
(a small speaker), an IR (Infra Red) Emitter and Receiver Module, a H-Bridge Motor
Driver Module, and a Motor Encoder Module. In the absence of a fully assembled
physical model, the IR Module will be substituted by a IR LED indicator (i.e., a
common LED) and a bounce-free switch (STOP#), the output signal of the Encoder
Module will be provided by a Function Generator (initial frequency is 5.5KHz), and
the PWM signal to drive the H-Bridge will be verified using a Logic Analyzer
(initial duty cycle is 50%). All signals should comply with TTL levels.
The system should implement the operations as follows: upon receiving the asserted
START# signal (active-low), the Buzzer should sound (the frequency of the output
signal f = 5.5KHz), and the LED indicator should blink six times (at the rate of 1
blink/s). The Buzzer should also be turned off when the blinking is over. Then the IR
Emitter LED should be turned on. The PWM signal driving the motor should also be
turned on at this point (f = approx. 30KHz, initial duty cycle = 50% to match the input
frequency of 5.5 KHz). Until an active-low signal from the IR Receiver (i.e., from the
STOP# switch) is detected indicating that the object on the belt has tripped the IR beam,
the system should sample the frequency of the signal received from the Encoder, and
respond to it by adjusting the duty cycle of the PWM signal as given in the Table
below.
Input frequency (KHz) 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1 6.3
Duty cycle of PWM signal (%) 90 80 70 60 50 40 30 20 10
When the desired end position for the object is reached, the PWM signal should be turned
off (duty cycle = 0%), the Buzzer should sound (at 3.5KHz), and the LED indicator
should blink 10 times (at the rate of 2 blinks/s). The Buzzer and the IR LED indicator
should be turned off when the blinking is over. The process should restart when the
START# signal is asserted again.
You are to design, simulate, build, and demonstrate the operation of the system
specified above using the Adapt9S12DP512 Board in the Lab and circuits constructed on
your Breadboard.
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ECE 4510/5530 MICROCONTROLLER APPLICATIONS

Fall 2008

Laboratory Design Project

(Team Project)

Total: 40 pts. (10% of the course grade) Due 4:00pm, Thursday, November 20, 2008

The theme of the project is to move an object that has been placed on a conveyor belt from a start position to a specific end position. If it was built, a physical model of the plant would include the peripherals as follows: a Start Switch, a LED indicator, a Buzzer (a small speaker), an IR (Infra Red) Emitter and Receiver Module, a H-Bridge Motor Driver Module, and a Motor Encoder Module. In the absence of a fully assembled physical model, the IR Module will be substituted by a IR LED indicator (i.e., a common LED) and a bounce-free switch (STOP#), the output signal of the Encoder Module will be provided by a Function Generator (initial frequency is 5.5KHz), and the PWM signal to drive the H-Bridge will be verified using a Logic Analyzer (initial duty cycle is 50%). All signals should comply with TTL levels.

The system should implement the operations as follows: upon receiving the asserted START# signal (active-low), the Buzzer should sound (the frequency of the output signal f = 5.5KHz ), and the LED indicator should blink six times (at the rate of 1 blink/s ). The Buzzer should also be turned off when the blinking is over. Then the IR Emitter LED should be turned on. The PWM signal driving the motor should also be turned on at this point ( f = approx. 30KHz , initial duty cycle = 50% to match the input frequency of 5.5 KHz). Until an active-low signal from the IR Receiver (i.e., from the STOP# switch) is detected indicating that the object on the belt has tripped the IR beam, the system should sample the frequency of the signal received from the Encoder, and respond to it by adjusting the duty cycle of the PWM signal as given in the Table below.

Input frequency (KHz) 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1 6. Duty cycle of PWM signal (%) 90 80 70 60 50 40 30 20 10

When the desired end position for the object is reached, the PWM signal should be turned off ( duty cycle = 0% ), the Buzzer should sound (at 3.5KHz ), and the LED indicator should blink 10 times (at the rate of 2 blinks/s ). The Buzzer and the IR LED indicator should be turned off when the blinking is over. The process should restart when the START# signal is asserted again.

You are to design, simulate, build, and demonstrate the operation of the system specified above using the Adapt9S12DP512 Board in the Lab and circuits constructed on your Breadboard.

Tasks:

a) Summarize the key points of your design. That should include a list of ports and bit maps, and a discussion of your approach to implement the required functions using hardware and software means. You should clearly indicate what internal modules of the 9S12DP512 microcontroller have been used (if applicable). The CPU clock should be set to 24MHz. Comment on your design steps, and give a conclusion of your project. (5 pts.)

b) Give a detailed schematic diagram for the whole system. The Adapt9S12DP512 Board should be represented by its interface connector signals. All 9S12DP512 microcontroller port signals used in your design should be buffered by suitable parts. All parts should have pin numbers and all traces should have signal names assigned. ( pts.)

c) Develop a C program for the software segment of the system. Your code should run from the flash. Turn in your C source file along with the compiled .lst file with comments. (14 pts.)

d) Build your circuit on your Breadboard and demonstrate the correct operation of the whole system to your lab instructor, or the course instructor. (16 pts.)

Each Design Team should submit a joint Project Report. In the report you should have the sections Introduction, Design, and Conclusions. The Design section should cover for Tasks a) - c). In the Conclusions section you should assess the performance of your system. You are also expected to comment on your work on the project.

Demonstrations will be given 2:00–4:00pm , on Thursday , November 20 , 2008 , in the Microcomputer Lab, Room B-214 , CEAS. Additional dates and times will be posted, if needed, for late projects.

Note : you will lose 4 pts. by each day your project (a working system and a report ) is tardy. No credit will be given if the project is late by more than three days. No projects will be accepted after 5:00pm, on Friday, December 5, 2008.