Project Source Code:

// Lcd module connections
sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB2_bit;
sbit LCD_D5 at RB3_bit;
sbit LCD_D6 at RB4_bit;
sbit LCD_D7 at RB5_bit;

sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB4_bit;
sbit LCD_D7_Direction at TRISB5_bit;
// End lcd module connnections
#define SW1  PORTD.RD1                   // Switch1 is connected RD1
#define SW2  PORTD.RD2                   // Switch2 is connected RD2
int i = 0;
float j =0;
char text[2];

void main() {

     TRISD = 0XFF;                         // PORTD is input
     PORTD = 0X00;                         // Clear PORTD
     PWM1_Init(1000);                      // Initialize PWM1 at 1KHz
     PWM1_Start();                         // Start PWM1
     Lcd_Init();                           // Initialize Lcd module
     Lcd_Cmd(_LCD_CURSOR_OFF);             // Lcd cursor off
     Lcd_Cmd(_LCD_CLEAR);                  // Led clear
     Lcd_Out(1,3,"DEVELOPED BY");          // Lcd show "DEVELOPED BY"
     Lcd_Out(2,1,"MINA TECHNOLOGY");       // Lcd show "MINA TECHNOLOGY"
     delay_ms(2000);                       // 2s delay
     Lcd_Cmd(_LCD_CLEAR);                  // Lcd clear
     Lcd_Out(1,3,"LED DIMMER");            // Lcd show "LED DIMMER"
     Lcd_Out(2,1,"BRIGHT:");               // Lcd show "BRIGHT:"
     Lcd_Out(2,16,"%");                    // Lcd show "%"
     while(1){                             // Endless loop

              if(SW1==1){
                        //while(SW1==1);
                        i = i+10;
                        delay_ms(250);
                        }
              if(SW2==1){
                         //while(SW2==1);
                         i = i - 10;
                         delay_ms(250);
                         }
              if(i==110) i =100;              // limit value of i;
              if(i==-10)i=0;                  // limit value of i;
              intTostr(i,text);               // convert integer to string
              text[12] =0;
              Lcd_Out(2,10,text);
              j = (i*255)/100;                // calculate the duty cycle for Pusle Width Modulation   
              PWM1_Set_Duty(j);               // duty cycle= (percent of duty cycle*255)/100;
             }


}