AUTOMATIC CONTROL SYSTEMS - Ferdowsi …profsite.um.ac.ir/~karimpor/autocontrol/lec5_aut_con.pdf ·...

AUTOMATIC CONTROLAUTOMATIC CONTROLSYSTEMSSYSTEMS

Reference:1. ATMEGA 32 datasheet2. AVR033: Getting Started with the Code Vision AVR C Compiler

In The Name of Allah

Ali KarimpourAssociate Professor

Ferdowsi University of Mashhad

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Ali Karimpour, Hamed Moll-Ahmadian Apr 2013

Lecture 5

The AVR Programming and Simulation

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Contents

Code Vision

ProteusThe Proteus provides detailed instructions on how to create new simulator models, using schematic techniques.

Programming a microcontroller through high level language(C)

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Introduction to AVRSpecially ATMEGA32 (One of the AVR ATMEGA microcontrollers family)

Simple Examples

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High-performance, Low-power Atmel®AVR® 8-bit Microcontroller

131 Powerful Instructions – Most Single-clock Cycle Execution

32 × 8 General Purpose Working Registers 32Kbytes of In-System Self-programmable Flash

program memory (W/E: 10,000 times) 1024Bytes EEPROM (W/E: 100,000 times) Data retention: 20 years at 85°C/100 years at 25°C Programming of Flash, EEPROM, Fuses, and

Lock Bits through the JTAG Interface

ATMEGA32 Features

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Operating Voltages• – 2.7V - 5.5V for ATmega32L• – 4.5V - 5.5V for ATmega32

Speed Grades• 0 - 8MHz for ATmega32L• 0 - 16MHz for ATmega32

Power Consumption at 1MHz, 3V, 25°C• Active: 1.1mA• Idle Mode: 0.35mA• Power-down Mode: < 1μA

ATMEGA32 Features

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ATMEGA32 Peripheral Features

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Two 8-bit Timer/Counters and one 16-bit Four PWM Channels 8-channel, 10-bit ADC Programmable Serial USART Programmable Watchdog Timer with Separate On-

chip Oscillator On-chip Analog Comparator Internal Calibrated RC Oscillator External and Internal Interrupt Sources Six Sleep Modes: Idle, ADC Noise Reduction, Power-

save, Power-down, Standby and Extended Standby

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ATMEGA 32


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One of the most important role of Registers is tuning the application of each unit

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Timer/Counter

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Timer/Counter

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PWM Channel

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Programmable Serial USART

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Watchdog Timer

Program must reset Watchdog timer before MCU RESET occurring

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Interrupt Sources

External Interrupts

Internal Interrupts

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External Interrupt Sources

What is the importance of External Interrupts?

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Internal Interrupt Sources

What is the importance of Internal Interrupts?

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Sleep Mode

Power-down Mode: < 1μA

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ATMEGA32 Pin Descriptions

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GND Ground.

VCC Digital supply voltage.

Port B (PB7..PB0) Port B is an 8-bit bi-directional I/O port.

Port A (PA7..PA0) Port A is an 8-bit bi-directional I/O port.

Port C (PC7..PC0) Port C is an 8-bit bi-directional I/O port.

Port D (PD7..PD0) Port D is an 8-bit bi-directional I/O port.

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XTAL1 Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.

RESET Reset Input.

AVCC AVCC is the supply voltage pin for Port A and the A/D Converter.

XTAL2 Output from the inverting Oscillator amplifier.

AREF AREF is the analog reference pin for the A/D Converter.

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ADC0-7

Port A serves as the analog inputs to the A/D Converter.

Port A Pins Alternate Functions

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XCK/T0T0 (Timer/Counter0 External Counter Input)XCK (USART External Clock Input/Output)

Port B Pins Alternate Functions

T1T1 (Timer/Counter1 External Counter Input)

INT2/AINOAIN0 (Analog Comparator Positive Input)INT2 (External Interrupt 2 Input)

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PD2INT0 (External Interrupt 0 Input)

Port D Pins Alternate Functions

PD3INT1 (External Interrupt 1 Input)

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Code Vision AVRProgramming a microcontroller through high level language(C)

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Code Vision AVR

1. Opening Code vision

2. Creating new project

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Code Vision AVR

3. Chip selection

4. Clock setting

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Code Vision AVR

5. Port setting

- Selecting port

- Input / Output selection (DDRx)

- Pull up / Output value selection(PORTx)

x can be: A / B / C / D

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Code Vision AVR

6. External Interrupts setting

- Interrupt Number selection

- Interrupt Mode determination(Low level / Any change / Falling Edge / Rising Edge)

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Code Vision AVR

7. Timers setting

- Timer Number selection- Timer or Counter determination

- Timer Frequency determination (CSxx)- Timer Mode determination (WGMxx)

x can be: 0 / 1 / 2

- Timer Interrupt (OCIEx / TOIEx)- Timer Initial Values (TCNTx / OCRx)

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Code Vision AVR

8. Serial USART setting

- Serial Dirrection selection- Serial Interrupt enabling (RXCIE / TXCIE)- Serial Baud rate determination (UBRR)- Serial Communication Parametersdetermination (UCSRC)- Serial Mode selection

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Code Vision AVR

9. LCD setting

- LCD Port selection

- LCD Selection

- LCD Pin Out explanation

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Code Vision AVR

10. Completing the Project

- Save source file

- Save Project file

- Save Code Wizard AVR Project file

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Code Vision AVRGenerated Program Save , Compile and

Built ProgramRun the Terminal (Serial) Terminal Setting

Message Window

Template Codes

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Code Vision AVR

Generated Program.txt Generated Program.dox Generated Program.pdf

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Code Vision AVR

Save , Compile and Built Program

place your code in determinedplaces

Save Compile and Build yourProgram

Information Window shows theoccurred Warnings and Errors

Now The Hex file of your Codeis Generated here:

Project path/Exe/

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Proteus 7 ProfessionalThe Proteus provides detailed instructions on how to create new simulator models, using schematic techniques.

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Proteus 7 Professional

1. Opening Proteus 1. Opening Proteus. 2. Placing the devices of the circuit. 3. Wiring the circuit. 3. Programming the micro (ATmega32). 4. Adding probes and sensors if needed. 5. Simulating the circuit.

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Pick new object

Select mode

Wiring mode

Power / GND / etc

More Powers and Generators

Voltage and Current Probes

Seneor and Instrumentation

Run the simulation

Component mode

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Proteus 7 ProfessionalYou can search for your device

here

OR find it from the Category

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Some devices that has been used in next examples

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Simple ExamplesSimple programming and simulation examples

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Simple Examples

Example1 Used Blocks: I/O ports

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Simple Examples

Example2 Used Blocks: I/O ports Counter0

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Simple Examples

Example3 Used Blocks: I/O ports Counter0 PWM2

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Simple Examples

Example4 Used Blocks: I/O ports Counter0 PWM2 Interrupt

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Simple Examples

Example5 Used Blocks: I/O ports Counter0 PWM2 Interrupt USART

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A manual control system with brain microcontroller

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AUTOMATIC CONTROL SYSTEMS - Ferdowsi …profsite.um.ac.ir/~karimpor/autocontrol/lec5_aut_con.pdf ·...

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