Controll the entire port of PIC16F877A

#include <xc.h>

#define _XTAL_FREQ 20000000

__CONFIG(FOSC_HS & WDTE_OFF & PWRTE_OFF & BOREN_OFF & LVP_ON & CPD_OFF & WRT_OFF & CP_OFF);

void main(void) {

TRISD =0x00;// entire pins of port D set as output

TRISB =0x00;// entire pins of port B set as output

TRISC =0x00;// entire pins of port C set as output

while(1)

{

PORTD =0xff;// turn the entire portD HIGH

__delay_ms(500);//wait 1/2 second

PORTB =0xff;// turn the entire portB HIGH

PORTC =0x00;// turn the entire portC LOW

__delay_ms(500);//wait 1/2 second

PORTD =0x00;// turn the entire portD LOW

__delay_ms(500);//wait 1/2 second

PORTB =0x00;// turn the entire portB LOW

PORTC =0xff;// turn the entire portC HIGH

__delay_ms(500);//wait 1/2 second

}

return;

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