cpu/mc1322x/slip-uart1.c

   1 /*
   2  * Copyright (c) 2006, Swedish Institute of Computer Science
   3  * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
   4  * to the MC1322x project (http://mc1322x.devl.org) and Contiki.
   5  *
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the Institute nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * This file is part of the Contiki OS.
  33  *
  34  * $Id: slip-uart1.c,v 1.1 2010/06/09 14:43:22 maralvira Exp $
  35  */
  36
  37 /*
  38  * Machine dependent mc1322x SLIP routines for UART1.
  39  */
  40
  41 #include "contiki.h"
  42 #include "dev/slip.h"
  43
  44 #include "mc1322x.h"
  45
  46 /*---------------------------------------------------------------------------*/
  47 void
  48 slip_arch_writeb(unsigned char c)
  49 {
  50   uart1_putc(c);
  51 }
  52 /*---------------------------------------------------------------------------*/
  53 /*
  54  * The serial line is used to transfer IP packets using slip. To make
  55  * it possible to send debug output over the same line we send debug
  56  * output as slip frames (i.e delimeted by SLIP_END).
  57  *
  58  */
  59 /*---------------------------------------------------------------------------*/
  60 #if WITH_UIP
  61 int
  62 putchar(int c)
  63 {
  64 #define SLIP_END 0300
  65   static char debug_frame = 0;
  66
  67   if (!debug_frame) {           /* Start of debug output */
  68     slip_arch_writeb(SLIP_END);
  69     slip_arch_writeb('\r');     /* Type debug line == '\r' */
  70     debug_frame = 1;
  71   }
  72
  73   slip_arch_writeb((char)c);
  74
  75   /*
  76    * Line buffered output, a newline marks the end of debug output and
  77    * implicitly flushes debug output.
  78    */
  79   if (c == '\n') {
  80     slip_arch_writeb(SLIP_END);
  81     debug_frame = 0;
  82   }
  83
  84   return c;
  85 }
  86 #endif
  87 /*---------------------------------------------------------------------------*/
  88 /**
  89  * Initalize the RS232 port and the SLIP driver.
  90  *
  91  */
  92 void
  93 slip_arch_init(unsigned long ubr)
  94 {
  95   uart1_set_input(slip_input_byte);
  96 }
  97 /*---------------------------------------------------------------------------*/