cpu/msp430/slip_uart1.c

   1 /*
   2  * Copyright (c) 2006, Swedish Institute of Computer Science
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the Institute nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)$Id: slip_uart1.c,v 1.8 2008/02/03 20:59:35 adamdunkels Exp $
  30  */
  31
  32 /*
  33  * Machine dependent MSP430 SLIP routines for UART1.
  34  */
  35
  36 #include <io.h>
  37 #include <signal.h>
  38
  39 #include "contiki.h"
  40
  41 #include "dev/slip.h"
  42 #include "dev/uart1.h"
  43 /*---------------------------------------------------------------------------*/
  44 void
  45 slip_arch_writeb(unsigned char c)
  46 {
  47   uart1_writeb(c);
  48 }
  49 /*---------------------------------------------------------------------------*/
  50 /*
  51  * The serial line is used to transfer IP packets using slip. To make
  52  * it possible to send debug output over the same line we send debug
  53  * output as slip frames (i.e delimeted by SLIP_END).
  54  *
  55  */
  56 /*---------------------------------------------------------------------------*/
  57 #if WITH_UIP
  58 int
  59 putchar(int c)
  60 {
  61 #define SLIP_END 0300
  62   static char debug_frame = 0;
  63
  64   if (!debug_frame) {           /* Start of debug output */
  65     slip_arch_writeb(SLIP_END);
  66     slip_arch_writeb('\r');     /* Type debug line == '\r' */
  67     debug_frame = 1;
  68   }
  69
  70   slip_arch_writeb((char)c);
  71
  72   /*
  73    * Line buffered output, a newline marks the end of debug output and
  74    * implicitly flushes debug output.
  75    */
  76   if (c == '\n') {
  77     slip_arch_writeb(SLIP_END);
  78     debug_frame = 0;
  79   }
  80
  81   return c;
  82 }
  83 #endif
  84 /*---------------------------------------------------------------------------*/
  85 /**
  86  * Initalize the RS232 port and the SLIP driver.
  87  *
  88  */
  89 void
  90 slip_arch_init(unsigned long ubr)
  91 {
  92   uart1_set_input(slip_input_byte);
  93 }
  94 /*---------------------------------------------------------------------------*/