ECE341 Introduction to Microcontrollers

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ECE341Introduction to Microcontrollers
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Grading

• 20 Homework
• 25 Quizzes
• 25 Midterm
• 30 Final

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Rules

• Turn off cellular phones
• Be on-time for the lectures Labs
• No late homework
• No makeup tests (including quiz, midterm, and
  final)
• No cheating

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What is in this class?
Assembly C
MC68HC11

• Microcontroller programming, applications, and
  interfacing.

CME11E9-EVBU
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Hardware Evaluation BoardMotorola 68HC11 EVBU
http//www.axman.com
Important!!!
You will need such an evaluation board next week

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Objectives

• 1. Learn the architecture and instruction set of
  a typical microcontroller
• 2. Learn how to program a microcontroller with C
  language
• 3. Learn how to Interface external devices to a
  microcontroller

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(Official) Course Objectives

• After completing this course the student will be
  able to
• Explain the architecture and operation of a
  microcontroller
• Write simple assembly language programs to
  perform basic functions like multi-byte addition
  and subtraction.
• Write C code to interface dip switches, 7 segment
  displays and keypads to microcontrollers.
• Write C code for ADC applications like digital
  voltmeters.
• Write C code for an on-chip timer in order to
  implement a finite state machine like a traffic
  controller. And then compare their design with
  hardware implementations like ROM and FPGA
  designs done in ECE 205.
• Write C code to measure the period of a
  squarewave using input capture and to control a
  motor using pulse width modulation.
• Write C code to communicate between two
  microcontrollers using serial I/O protocol.
• write C code to interface with keypad and LCD
  display.

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Languages Using

• Assembly language is used to explain the
  architecture and instruction set of a
  microcontroller.
• C language is used in the applications
  development.

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A concept you MUST have

• Software and hardware development goes
  hand-in-hand

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A System View
High Level Language
Compiler
Object Code
Assembler
Machine Code
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Microprocessors Microcontrollers

• Microprocessors are used widely in desktop
  computers and embedded systems.
• A microprocessor need external memories,
  peripheral interfaces, etc. to build a complete
  system.
• A microcontroller incorporates a small amount of
  memory, timers, A/D and D/A converters, and other
  peripheral functions in one chip (along with the
  CPU).

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Features of the 68HC11A8 microcontroller
- 8-bit CPU - 256 bytes SRAM - 512 bytes
EEPROM - 8 KB ROM - 3 input capture channels - 5
output compare functions - one 8-bit pulse
accumulator - one serial communication interface
(SCI) - one serial peripheral interface
(SPI) - real-time interrupt (RTI)
circuit - 8-channel 8-bit A/D converter - computer
operate properly (COP) watchdog system
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• Examples of microcontroller applications
• - Displays
• - Printers
• - Keyboards
• - Microwave ovens
• - Refrigerators
• - Washing machines
• - Automobile engine fuel injection
• - Fax machines
• - Motor speed control
• - etc.

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Course Description

• 1. General introduction
• 2. Microcontroller Architecture
• a. Memory organization
• b. Instruction set and addressing modes
• c. Use of assembly language programming to
  understand processor architecture
• 3. Input/Output
• a. Programmed I/O
• b. I/O handshake
• c. Interrupt driven I/O
• d. Applications like multiplexed 7 segment
  display, key padding, LCD interfacing
• 4. Analog-To-Digital Conversion
• 5. On-chip timer
• a. Input capture
• b. Output compare
• c. Applications like PWM, speed measurement
• 6. Serial I/O

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Plan