16F877 c

/*  Name     : main.c
 *  Purpose  : Main file for blinking an LED with PIC16F877.
 */




#include



// Configuration word for PIC16F877
__CONFIG( FOSC_HS & WDTE_OFF & PWRTE_ON & CP_OFF & BOREN_ON
        & LVP_OFF & CPD_OFF & WRT_ON & DEBUG_OFF);

// Define LED pin

#define LED  RB0


// Define CPU Frequency


// This must be defined, if __delay_ms() or

// __delay_us() functions are used in the code
#define _XTAL_FREQ   20000000



void main(void)

{

    TRISB0 = 0;                   // Make RB0 pin output

    LED    = 0;                   // Make RB0 low

    while(1)
    {

        __delay_ms(500);       // Half sec delay

        LED = 0;               // LED off

        __delay_ms(500);       // Half sec delay

        LED = 1;               // LED on

    }
}