UART pic17f628a

serialasincrono.c

/* 
 * File:   serialasincrono.c
 * Author: MIGUEL
 *
 * Created on 3 de septiembre de 2014, 10:07 p.m.
 *
 * Programa: Transmite las letras H,O,L,A en modo asíncrono 9600/8N1
 */

#include <stdio.h>
#include <stdlib.h>
#include "serialasincrono.h"

#define _XTAL_FREQ 20000000

/*==============================================================================
	Inicializar puertos, esta función es llamada luego en el main().
==============================================================================*/

void initPorts(void)
{
	TRISB = 0b00000110;
}

void initUART(void)
{
    TXSTAbits.BRGH=0;
    SPBRG=32;
    TXSTAbits.SYNC=0;
    RCSTAbits.SPEN=1;
    TXSTAbits.TXEN=1;
}

void busyUART(void)
{
    ocupado:
    if (PIR1bits.TXIF==0){
        goto ocupado;
    } else return;
}
/*==============================================================================
	Bucle principal
==============================================================================*/

int main(void)
{
	// Inicializar puertos y periféricos
	initPorts();
        initUART();
	// Repetir indefinidamente
	while(1)
	{
            busyUART();
                TXREG = 0b01001000; // ascii H
                //_delay(1000000);
            busyUART();
                TXREG = 0b01001111; // ascii O
            //_delay(1000000);
            busyUART();
                TXREG = 0b01001100; // ascii L
                //_delay(1000000);
            busyUART();
                TXREG = 0b01000001; // ascii A
                //_delay(1000000);
            busyUART();
                TXREG = 0b00001101; //
                //_delay(1000000);
            busyUART();
                TXREG = 0b00001010;
                //_delay(1000000);
	}
}

serialasincrono.h

/* 
 * File:   serialasincrono.h
 * Author: MIGUEL
 *
 * Created on 3 de septiembre de 2014, 10:05 p.m.
 */

// PIC16F628A Configuration Bit Settings

// 'C' source line config statements

#include <xc.h>

// #pragma config statements should precede project file includes.
// Use project enums instead of #define for ON and OFF.

// CONFIG
#pragma config FOSC = HS        // Oscillator Selection bits (HS oscillator: High-speed crystal/resonator on RA6/OSC2/CLKOUT and RA7/OSC1/CLKIN)
#pragma config WDTE = OFF       // Watchdog Timer Enable bit (WDT disabled)
#pragma config PWRTE = OFF      // Power-up Timer Enable bit (PWRT disabled)
#pragma config MCLRE = ON       // RA5/MCLR/VPP Pin Function Select bit (RA5/MCLR/VPP pin function is MCLR)
#pragma config BOREN = ON       // Brown-out Detect Enable bit (BOD enabled)
#pragma config LVP = OFF        // Low-Voltage Programming Enable bit (RB4/PGM pin has digital I/O function, HV on MCLR must be used for programming)
#pragma config CPD = OFF        // Data EE Memory Code Protection bit (Data memory code protection off)
#pragma config CP = OFF         // Flash Program Memory Code Protection bit (Code protection off)