nes-proj/cpu/avr/dev/rs232.c

131 lines
3.7 KiB
C

/*
* Copyright (c) 2005, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: rs232.c,v 1.1 2006/06/17 22:41:21 adamdunkels Exp $
*/
#include <avr/io.h>
#include <avr/signal.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include "contiki.h"
#include "dev/slip.h"
#include "dev/serial.h"
#include "dev/rs232.h"
static volatile unsigned char txwait;
/*static unsigned char slipmode;*/
static int (* input_handler)(unsigned char) = NULL;
/*---------------------------------------------------------------------------*/
SIGNAL(SIG_UART0_TRANS)
{
txwait = 0;
}
/*---------------------------------------------------------------------------*/
SIGNAL(SIG_UART0_RECV)
{
unsigned char c;
c = UDR0;
if(input_handler != NULL) {
input_handler(c);
}
/* if(slipmode) {
slip_input_byte(c);
} else {
serial_input_byte(c);
}*/
}
/*---------------------------------------------------------------------------*/
void
rs232_init(void)
{
/* Enable transmit. */
UCSR0B = _BV(RXCIE) | _BV(TXCIE) | _BV(RXEN) | _BV(TXEN);
/* Set baud rate (23 =~ 38400) */
UBRR0H = 0;
UBRR0L = 23;
/* slipmode = 0;*/
txwait = 0;
input_handler = NULL;
}
/*---------------------------------------------------------------------------*/
/*void
rs232_init_slip(void)
{
rs232_init();
slipmode = 1;
}*/
/*---------------------------------------------------------------------------*/
void
rs232_print_p(prog_char *buf)
{
while(pgm_read_byte(buf)) {
rs232_send(pgm_read_byte(buf));
++buf;
}
}
/*---------------------------------------------------------------------------*/
void
rs232_print(char *buf)
{
while(*buf) {
rs232_send(*buf++);
}
}
/*---------------------------------------------------------------------------*/
void
rs232_send(unsigned char c)
{
txwait = 1;
UDR0 = c;
while(txwait);
}
/*---------------------------------------------------------------------------*/
void
rs232_set_input(int (*f)(unsigned char))
{
input_handler = f;
}
/*---------------------------------------------------------------------------*/
void
slip_arch_writeb(unsigned char c)
{
rs232_send(c);
}
/*---------------------------------------------------------------------------*/