MPLAB XC8 Compiler – LED Blinking - Basic Start-up Tutorials

A sample program to blink an LED  by using MPLBX - C Compilers  in  PIC16F877A as our previous post  PIC Microcontroller Tutorial gives the basic Details of PIC16f877A.

           In MPLABX  at first we need to configure the bit first.  That means ,

•  How or what type Oscillator will use  ?
•  Is there needed Watch Dog timer ?
•  Program Memory Code Protection bit ie, no one can be read the HEX code from  the Controller.

      For more learn from Here.

#include<xc.h> 
// CONFIG
#pragma config FOSC = HS        // Oscillator Selection bits (HS oscillator)
#pragma config WDTE = ON        // Watchdog Timer Enable bit (WDT enabled)
#pragma config PWRTE = OFF      // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOREN = OFF      // Brown-out Reset Enable bit (BOR disabled)
#pragma config LVP = ON         // Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit (RB3/PGM pin has PGM function; low-voltage programming enabled)
#pragma config CPD = OFF        // Data EEPROM Memory Code Protection bit (Data EEPROM code protection off)
#pragma config WRT = OFF        // Flash Program Memory Write Enable bits (Write protection off; all program memory may be written to by EECON control)
#pragma config CP = OFF         // Flash Program Memory Code Protection bit (Code protection off)


#define _XTAL_FREQ 8000000 // taking as crystal frequency as 8Mhz
#define LED_Port PORTD     // defining PORTD as LED_Port
int main()
{
    TRISD = 0x00;          // Making PORTD as output
    while(1)
    {
        LED_Port =0Xff;    // giving High values to Port to lightup LED
        __delay_ms(500);   // giving a half second delay
        LED_Port = 0x00;   // Giving a low to port to turn off the LEDs
        __delay_ms(500);
    }

}