104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2007, 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.
|
|
*
|
|
* @(#)$Id: slip_uart1.c,v 1.1 2007/02/02 13:13:16 bg- Exp $
|
|
*/
|
|
|
|
/*
|
|
* Machine dependent AVR SLIP routines for UART1.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <avr/interrupt.h>
|
|
|
|
#include "contiki.h"
|
|
|
|
#include "dev/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)
|
|
{
|
|
uint8_t dummy;
|
|
spl_t s = splhigh();
|
|
|
|
UBRR1L = ubr;
|
|
UBRR1H = ubr >> 8; /* Always zero */
|
|
|
|
UCSR1C = BV(UCSZ1) | BV(UCSZ0); /* 1 start bit, no parity, 1 stop bit */
|
|
UCSR1B = BV(RXEN) | BV(TXEN) | BV(RXCIE);
|
|
dummy = UDR1; /* Flush RX buffer. */
|
|
|
|
splx(s);
|
|
|
|
stdout = &slip_stdout;
|
|
}
|
|
|
|
void
|
|
slip_arch_writeb(unsigned char c)
|
|
{
|
|
while (!(UCSR1A & BV(UDRE1)))
|
|
;
|
|
UDR1 = c;
|
|
}
|
|
|
|
ISR(SIG_UART1_RECV)
|
|
{
|
|
/* Should deal with receive errors. */
|
|
slip_input_byte(UDR1);
|
|
}
|