Top Posts Tagged with #pic microcontroller tutorial

Create Blinking LED Project Using PIC Microcontroller [ PIC18F2550 ] [ step by step ]

Hi, If you are a beginner , it is perfect to start with blinking led .This is a very simple project and we need 7 LED and PIC 18F2550 microcontroller .In this project we will use MikroC compiler to code.

Now we are going to Create this project >>

Proteus Project :

*Open Proteus and Create new project

You will see as below :

After finishing those step ,You need to follow as below:

Pick all parts from library :

In this way , pick from Library "PIC 18F2550", "crystal" , " 22pf capacitor" , "green LED" ,"Power" and "Ground" . (adsbygoogle = window.adsbygoogle || []).push({});

[ Note :If you are absolutely a new with PIC 18f2550 microcontroller , you need to see Introduction with PIC 18f2550 to understand all ports and pin]

Create Blinking LED Project Using PIC Microcontroller [ PIC18F2550 ] [step by step ]

Now we need the main hex file to operate .Here you need to take a look on here , we selected RB0-RB7 pins and made connection with GND port of each LED .So if portB is 1 , those LED will be on .

MikroC Code :

Open MikroC and Create a new Project :

Now Write the source code given below :

Source Code

//////////////////////////////////////////////////////////////////////

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void main(){

TRISB=0x00;

while(1){

PORTB=0x01;

delay_ms(400);

PORTB=0x02;

delay_ms(400);

PORTB=0x04;

delay_ms(400);

PORTB=0x08;

delay_ms(400);

PORTB=0x10;

delay_ms(400);

PORTB=0x20;

delay_ms(400);

PORTB=0x40;

delay_ms(400);

PORTB=0x80;

delay_ms(400);

} }

////////////////////////////////////////////////////////////////////

TRISB is used for selecting PORTB as Input or Output . Here 1 for input and 0 for Output .

If we write TRISB=0xFF; and 0xFF will be in binary "11111111" .By applying this we get portb for input .

If we write TRISB=0x00; and 0xFF will be in binary "00000000" .By applying this we get portb for output. [if you don't understand pinout of PIC 18f2550 please follow the link]

We used delay_ms(400) function .That means microcontroller stop for 400ms .

0x01 is hexadecimal number and in binary "00000001" .Means first pin or RB0 pin of PORTB will be 1 .In this condition 1 means this pin gets +5v[VDD] and 0 means ground(GND) .It is said computer understand 0 and 1 .But it is just an electronic device which calculate something according to instruction. (adsbygoogle = window.adsbygoogle || []).push({});

So,

0x00 <--------------> "all zero" <--------------> RB0,RB1,RB2,RB3,RB4,RB5,RB6,RB7 remain OFF

0x01 <--------------> "00000001" <--------------> Only RB0 is +5v & allothers remain GND

0x02 <--------------> "00000010" <--------------> Only RB1 is +5v & all others remain GND

0x04 <--------------> "00000100" <--------------> Only RB2 is +5v &all others remain GND

0x08 <--------------> "00001000" <--------------> Only RB3 is +5v &all others remain GND

0x10 <--------------> "00010000" <--------------> Only RB4 is +5v &all others remain GND

0x20 <--------------> "00100000" <--------------> Only RB5 is +5v &all others remain GND

0x40 <--------------> "01000000" <--------------> Only RB2 is +5v &all others remain GND

0x80 <--------------> "10000000" <--------------> Only RB2 is +5v &all others remain GND

Why TRISB ?

Listen , A microcontroller can be used for many purposes and the specific purpose we need can be defined by the source code . Basically in blinking led , each led will be on or off in one after one way .That means each pin of PORTB will be on or off .For this purpose we need to initialize PORTB as output.

So we have to use TRISB to define PORTB as Input or Output .

When TRISB=0x00; all pins for OUTPUT.

When TRISB=0xFF; all pins for INPUT.

If in case PORTA , we will have to use TRISA .

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I have one thing to say, i am just a man having little knowledge . If i have done any mistake ,please pardon me .

Thank You!

http://feeds.feedburner.com/microcontroller_for_beginners

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Introduction to PIC 18F2550 Micocontroller

Microcontroller :

Basically microcontroller is one kind of Integrated circuit (IC) which can be defined as the single chip computer . Microcontroller is very similar with computer and a microcontroller contains processor ,I/O ports , RAM , EEPROM etc.Microcontroller is a little computer which is designed to govern the operation of embedded systems in motor vehicles, robots, office machines, complex medical devices, mobile radio transceivers, vending machines, home appliances, and various other devices.

If you like to get more details , here is a link wikipedia

PIC 18f2550 Micocontroller's Pin out

Some necessary information about PIC 18F2550 Microcontroller are given here : google_ad_client ="3355702841280778"; google_ad_host ="3355702841280778"; google_ad_width =500; google_ad_height =200; google_ad_type = "text_image"; google_color_border = "FFFFFF"; google_color_bg = "ffffff"; google_color_link = "191919"; google_color_text = "191919"; google_color_url = "191919"; google_page_url = "http://pictutorial.net"//--> PORTA : Pins from RA0-RA7 are included to PORTA . Those pins can perform in both operation input and output . Those pins are also used for converting Analog signal to Digital signal . If we write PORTA.F0 =1 , RA0 the pin gets VDD . When PORTA.F0 =0 , the pin gets GND . As we like to use PORTA for I/O , it is required to select related RESISTER . We can initialize RA0 as input by TRISA.F0=1 and TRISA.F0=0 for output .

PORTB : Pins from RB0-RB7 are included to PORTB . Those pins also can perform in both operation input and output .Those pins have ADC functions also. If we write PORTB.F0 =1 , RB0 the pin gets VDD . When PORTB.F0 =0 , the pin gets GND . As we like to use PORTB for I/O , it is required to select related RESISTER . We can initialize RB0 as input by TRISB.F0=1 and TRISB.F0=0 for output . PORTC : Generally we use RC0,RC1,RC2,RC7,RC6 for input /output . If we write PORTC.F0 =1 , RC0 the pin gets VDD . When PORTC.F0 =0 , the pin gets GND . As we like to use PORTC for I/O , it is required to select the RESISTER . We can initialize RC0 as input by TRISC.F0=1 and TRISC.F0=0 for output . (adsbygoogle = window.adsbygoogle || []).push({}); USB Communication Pins : The 14 , 15 and 16 number pins are used for USB communication .The microcontroller supports USB 1.0 . *Pin 14 ----- Vusb [Which is connected with 220nf capacitors in USB communication] *Pin 16 ----- D+ *Pin 15 ----- D- Pins for Serial Communication : Basically 17and 18 pins are used for RS232 communication .The 17th pin is RC6 and 18th pin is RC7 .Here we use 17th pin or RC6 pin as Tx and 18th pin or RC7 pin as Rx .Tx for transmitting signal and Rx for receiving signal . VDD , VSS & MCLR :We need to supply 5 volt to run the microcontroller .VDD pin should be connected with +5V and all VSS pins should be connected with groung(GND) . Here is the important part , the MCLR pin is used to RESET microcontroller and it's also called the Master RESET pin . When MCLR==1 ,it's not activated and in MCLR==0 it's activated . INTERRUPT : Basically interrupt means restrict something .We can use INT pin for enabling and disabling interrupt in microcontroller . INT=1 for enabling interrupt and INT=0 for disabling the interrupt .During INT=1 others process should be disabled . Clock :With a view to measuring the time , we need crystal and two 22pf capacitors .If we use 12MHz crystal , we can measure time period by it . 9th and 10th number pins [OSC1 &OSC2 ] are used for connecting crystal . Pic microcontroller also has SPI , I2C connection options . I didn't describe about SPI because at beginning state you don't need this . When you will be an expert , automatically you will be informed about this . You will know about I2C communication in Real Time Digital Clock Project

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Actually i am a man having little knowledge . If i make any mistake ,please pardon me .

Thank You!

http://feeds.feedburner.com/microcontroller_for_beginners

#Pic Tutorial #pic programming in c #pic microcontroller tutorial #pic controller #pcb #Micocontroller #Introduction #experiment kit #embedded c tutorial #embedded c programming tutorial #18F2550