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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Alan Korr
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "serial.h"
#define TDRE 7 /* transmit data register empty */
#define RDRF 6 /* receive data register full */
#define ORER 5 /* overrun error */
#define FER 4 /* frame error */
#define PER 3 /* parity error */
static int serial_byte,serial_flag;
void serial_putc (char byte)
{
while (!(SSR1 & (1<<TDRE)));
TDR1 = byte;
clear_bit(TDRE,SSR1_ADDR);
}
void serial_puts (char const *string)
{
int byte;
while ((byte = *string++))
serial_putc (byte);
}
int serial_getc( void )
{
int byte;
while (!serial_flag);
byte = serial_byte;
serial_flag = 0;
serial_putc (byte);
return byte;
}
void serial_setup (int baudrate)
{
SCR1 = 0;
SSR1 = 0;
SMR1 = 0;
BRR1 = (FREQ/(32*baudrate))-1;
SCR1 = 0x70;
}
#pragma interrupt
void REI1 (void)
{
clear_bit (FER,SSR1_ADDR);
}
#pragma interrupt
void RXI1 (void)
{
serial_byte = RDR1;
serial_flag = 1;
clear_bit(RDRF,SSR1_ADDR);
}
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