PIC Microcontroller Programming & Practical: PIC MicroController with MikroC

57 Pages·2·2.176 MB·English

by  Fayyaz Hussain

PIC MICROCONTROLLER
PROGRAMMING &
PRACTICALS
FAYYAZ HUSSAIN
ELEKTRONICS GARAGE Rawalpindi Pakistan
PIC Microcontroller Programming
&
Practical
MikroC Edition

With Complete Circuit diagrams
&
Descriptions

Fayyaz Hussain

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Preface
I am working to manage my PIC controller projects data in book form in which just little idea, circuit and
MikroC code is written. In this view it my 2nd effort and small handy book in which I have discus some
medium level Projects for students and new learners before I have written basic level book of ten projects
which is available on amazon.
Next I am working on advance level Projects and managing in book form. Insha allah that version will be
complete with basic, medium and advance level projects.

Dedication
I am dedicating my all these efforts to my honorable parents and respected teachers.

About Writer
Lecturer: Swedish Institute of technology Rawalpindi Pakistan
Qualification:
DAE Electronics
B-Tech Electronics (Preston University Islamabad)
MSc Electronics (ISRA University Islamabad)
MS / MPhil Electronics (Continue) from ISRA University Islamabad
Email: [email protected]
Blog: www.elektronicsgarage1.blogspot.com
Wordpress: www.elektronicsgarage.wordpress.com

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Contents
Preface .......................................................................................................................................................... 2
Dedication ..................................................................................................................................................... 2
About Writer ................................................................................................................................................. 2
1. Display on Dot matrix ............................................................................................................................ 4
2. Scrolling text on LCD ............................................................................................................................. 7
3. Password based door lock & block ..................................................................................................... 11
4. Counting with falling edge of push button ......................................................................................... 16
5. Interface temperature sensor (LM35) ................................................................................................ 19
6. Electric boiler (ON/OFF) Controller ..................................................................................................... 23
7. Interface LDR for light intensity measurement................................................................................... 27
8. Sun tracker .......................................................................................................................................... 31
9. PWM (Variable duty cycle) using potentiometer ............................................................................... 35
10. Ampere meter ................................................................................................................................. 38
11. Digital Volt meter using PIC microcontroller .................................................................................. 43
12. Digital Watt meter .......................................................................................................................... 47
13. Stepper motor control .................................................................................................................... 51
14. UART Communication ..................................................................................................................... 54

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1. Display on Dot matrix

Dot matrix is an array of LEDs (group of LEDs) which use to display Graphic or text by different combination
of ON LEDs.

Programming of dot matrix is very tricky let start to make a Program for “E” Text Graphic to display like as
under.
Dot matrix consist on 7 rows and 5 columns, So scan columns by logic 1 and apply logic 0 to that row
where desire LED exists to ON.
For “E” text Graphic:
1. Column1=high all other Columns =0, & all rows = low to
display 1st line.
2. Column2=high all other columns =0, & R1, R4 and R7
low and all other high.
3. Same as rows logic for Column3 and 4
4. Column5=high all other low & in rows R1 and R7 low all
other rows remain high to display Complete text
graphic “E”
Anode of LEDs Connected with Columns and cathode
connected with rows so positive logic is for columns and
negative logic for rows.
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7x5 Dot matrix Circuit:

MikroC Programming:
// Dot Matrix 7x5 //
//Elektronicsgarage1.blogspot.com//
#include<built_in.h>
int i=0, j=0;

void main() {
TRISB=0x00;
TRISC=0x00;
PORTB=0x00;
PORTC=0x00;
while (1){
Delay_ms(1);
PORTC=0x10;
PORTB=0x00;
Delay_ms(1);
PORTC=0x08;
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PORTB=0x36;
Delay_ms(1);
PORTC=0x04;
PORTB=0x36;
Delay_ms(1);
PORTC=0x02;
PORTB=0x36;
Delay_ms(1);
PORTC=0x01;
PORTB=0x3E;
}
}

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2. Scrolling text on LCD

Here is new Project related to LCD text displaying and scrolling. Sometime if text is large to display on LCD
then we scroll it toward left side or some time we scroll data right side depends on application of the
project.
Components list
1. PIC16F877A (Pin out in 1st Practical) / 18F452 (same pin out)
2. LCD 16x2 (for Character display)
3. Crystal 10MHz
4. Capacitors 33pf
5. Pot-meter (variable resistor)
6. Push button
7. Polar Capacitor 47uf 16v (Electrolytic)
Pin Out 18F452:

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16x2 LCD Pin Out:

Circuit Diagram:

MikroC Programming Code:
//// +++ Designed by Elecktronics garage //////
//// www.elektronicsgarage1.blogspot.com ////
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#include <built_in.h>
//LCD define pins and set directions
sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB4_bit;
sbit LCD_D5 at RB5_bit;
sbit LCD_D6 at RB6_bit;
sbit LCD_D7 at RB7_bit;

sbit LCD_EN_Direction at TRISB0_bit;
sbit LCD_RS_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB4_bit;
sbit LCD_D5_Direction at TRISB5_bit;
sbit LCD_D6_Direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;
char text1[]=" Designed by "; // Text to display
char text2[]=" FAYYAZ HUSSAIN ";
char text3[]="www.elektronicsgarage1.blogspot.com";
int i=0;
void main()
{
LCD_Init();
Lcd_Cmd(_LCD_CLEAR);
Lcd_Cmd(_LCD_CURSOR_OFF); // to off cursor
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