#include <pic.h>
#include "sci.h"

/* Routines for initialisation and use of the SCI
 * for the PIC processor.
 */

/* other options:
 * frame errors
 */

void
sci_Init(void)
{
	BRGH = 0;	/* low baud rate */
	SPBRG = 51;	/* set the baud rate */

	SYNC = 0;	/* asynchronous */
	SPEN = 1;	/* enable serial port pins */
	CREN = 1;	/* enable reception */
	SREN = 0;	/* no effect */
	TXIE = 0;	/* disable tx interrupts */
	RCIE = 0;	/* disable rx interrupts */
	TX9  = 0;	/* 8-bit transmission */
	RX9  = 0;	/* 8-bit reception */
	TXEN = 1;	/* enable the transmitter */
}

void
sci_PutByte(unsigned char byte)
{
	while(!TXIF)	/* set when register is empty */
		continue;
	TXREG = byte;

	return;
}

unsigned char
sci_GetByte(void)
{
	while(!RCIF)	/* set when register is not empty */
		continue;

	return RCREG;	/* RXD9 and FERR are gone now */
}