PIC Microcontroller C Programming Examples

Posted on May 15, 2026 in Computers

Practical 1: LED Blinking Patterns

#include <xc.h>
#define _XTAL_FREQ 20000000

#pragma config FOSC = HS, WDTE = OFF, PWRTE = ON, LVP = OFF

void delay_ms(unsigned int time) {
    while(time--) __delay_ms(1);
}

void main(void) {
    ANSEL = 0x00; ANSELH = 0x00;
    TRISB = 0x00; PORTB = 0x00;
    while(1) {
        PORTB = 0xFF; delay_ms(500);
        PORTB = 0x00; delay_ms(500);
        PORTB = 0xAA; delay_ms(500);
        PORTB = 0x55; delay_ms(500);
    }
}

Practical 2: DC Motor Control

#include <xc.h>
#pragma config WDTE = OFF, LVP = OFF

void myMsDelay(unsigned int time) {
    unsigned int i, j;
    for(i = 0; i < time; i++) for(j = 0; j < 710; j++);
}

void main() {
    ANSEL = 0x00; ANSELH = 0x00;
    TRISCbits.TRISC0 = 0; TRISCbits.TRISC1 = 0; TRISCbits.TRISC2 = 0;
    while(1) {
        PORTCbits.RC0 = 1; PORTCbits.RC1 = 0; PORTCbits.RC2 = 1; myMsDelay(2000);
        PORTCbits.RC0 = 0; PORTCbits.RC1 = 0; PORTCbits.RC2 = 0; myMsDelay(2000);
        PORTCbits.RC0 = 0; PORTCbits.RC1 = 1; PORTCbits.RC2 = 1; myMsDelay(2000);
        PORTCbits.RC0 = 0; PORTCbits.RC1 = 0; PORTCbits.RC2 = 0; myMsDelay(2000);
    }
}

Practical 3: LCD Interfacing

#include <xc.h>
#define _XTAL_FREQ 8000000
#define LCD_DATA PORTD
#define rs RE0
#define rw RE1
#define en RE2

// Functions: init_LCD, LCD_command, LCD_data, LCD_write_string, msdelay
// Implementation details for 16x2 LCD in 8-bit mode provided.

Practical 4: External Interrupts

void __interrupt() switch_isr(void) {
    if (INTCONbits.INTF == 1) {
        PORTBbits.RB2 = ~PORTBbits.RB2;
        msdelay(200);
        INTCONbits.INTF = 0;
    }
}

Practical 5 & 6: DMX Data Arrays

These headers define DMX frame data for lighting control applications.

Practical 7: 7-Segment Display Counter

unsigned char seg_code[10] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F};
// Loop through array to display digits 0-9 on PORTB

Practical 8: PWM Motor Speed Control

Utilizes the CCP1 module to generate Pulse Width Modulation for variable motor speed control.