Contiki 2.6

slip_uart0.c

00001 /*
00002  * Copyright (c) 2006, Swedish Institute of Computer Science
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * @(#)$Id: slip_uart0.c,v 1.1 2010/08/24 16:23:20 joxe Exp $
00030  */
00031 
00032 /*
00033  * Machine dependent MSP430 SLIP routines for UART0.
00034  */
00035 
00036 #include "contiki-conf.h"
00037 #include "dev/slip.h"
00038 #include "dev/uart0.h"
00039 /*---------------------------------------------------------------------------*/
00040 void
00041 slip_arch_writeb(unsigned char c)
00042 {
00043   uart0_writeb(c);
00044 }
00045 /*---------------------------------------------------------------------------*/
00046 /*
00047  * The serial line is used to transfer IP packets using slip. To make
00048  * it possible to send debug output over the same line we send debug
00049  * output as slip frames (i.e delimeted by SLIP_END).
00050  *
00051  */
00052 /*---------------------------------------------------------------------------*/
00053 #if WITH_UIP
00054 int
00055 putchar(int c)
00056 {
00057 #define SLIP_END 0300
00058   static char debug_frame = 0;
00059 
00060   if (!debug_frame) {           /* Start of debug output */
00061     slip_arch_writeb(SLIP_END);
00062     slip_arch_writeb('\r');     /* Type debug line == '\r' */
00063     debug_frame = 1;
00064   }
00065 
00066   slip_arch_writeb((char)c);
00067   
00068   /*
00069    * Line buffered output, a newline marks the end of debug output and
00070    * implicitly flushes debug output.
00071    */
00072   if (c == '\n') {
00073     slip_arch_writeb(SLIP_END);
00074     debug_frame = 0;
00075   }
00076 
00077   return c;
00078 }
00079 #endif
00080 /*---------------------------------------------------------------------------*/
00081 /**
00082  * Initalize the RS232 port and the SLIP driver.
00083  *
00084  */
00085 void
00086 slip_arch_init(unsigned long ubr)
00087 {
00088   uart0_set_input(slip_input_byte);
00089 }
00090 /*---------------------------------------------------------------------------*/