nes-proj/platform/avr-raven/slip_uart0.c

94 lines
3.2 KiB
C

/*
* Copyright (c) 2010, University of Colombo School of Computing
* 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.
*
* @(#)$$
*/
/**
* \file
* Machine dependent AVR SLIP routines for UART0.
* \author
* Kasun Hewage <kasun.ch@gmail.com>
*/
#include <stdio.h>
#include "contiki.h"
#include "dev/rs232.h"
#include "slip.h"
/*---------------------------------------------------------------------------*/
static int
slip_putchar(char c, FILE *stream)
{
#define SLIP_END 0300
static char debug_frame = 0;
if (!debug_frame) { /* Start of debug output */
slip_arch_writeb(SLIP_END);
slip_arch_writeb('\r'); /* Type debug line == '\r' */
debug_frame = 1;
}
slip_arch_writeb((unsigned char)c);
/*
* Line buffered output, a newline marks the end of debug output and
* implicitly flushes debug output.
*/
if (c == '\n') {
slip_arch_writeb(SLIP_END);
debug_frame = 0;
}
return c;
}
/*---------------------------------------------------------------------------*/
static FILE slip_stdout = FDEV_SETUP_STREAM(slip_putchar, NULL,
_FDEV_SETUP_WRITE);
/*---------------------------------------------------------------------------*/
void
slip_arch_init(unsigned long ubr)
{
rs232_set_input(RS232_PORT_0, slip_input_byte);
stdout = &slip_stdout;
}
/*---------------------------------------------------------------------------*/
/*
XXX:
Currently, the following function is in cpu/avr/dev/rs232.c file. this
should be moved to here from there hence this is a platform specific slip
related function.
void
slip_arch_writeb(unsigned char c)
{
rs232_send(RS232_PORT_0, c);
}
*/