Contiki 2.6
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00001 /* 00002 * Copyright (c) 2007, Takahide Matsutsuka. 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 00011 * copyright notice, this list of conditions and the following 00012 * disclaimer in the documentation and/or other materials provided 00013 * with the distribution. 00014 * 3. The name of the author may not be used to endorse or promote 00015 * products derived from this software without specific prior 00016 * written permission. 00017 * 00018 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 00019 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 00020 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00021 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 00022 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00023 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 00024 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00025 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 00026 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00027 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00029 * 00030 * $Id: rs232.c,v 1.5 2009/03/17 20:20:45 adamdunkels Exp $ 00031 * 00032 */ 00033 /* 00034 * \file 00035 * This is RS-232C process based on polling. 00036 * Note that rs232.c and rs232-slip.c cannot be used at the same time. 00037 * \author 00038 * Takahide Matsutsuka <markn@markn.org> 00039 */ 00040 00041 #include "contiki.h" 00042 #include "dev/slip.h" 00043 #include "dev/serial-line.h" 00044 #include "dev/rs232.h" 00045 00046 PROCESS(rs232_process, "RS-232C polling process"); 00047 /*---------------------------------------------------------------------------*/ 00048 PROCESS_THREAD(rs232_process, ev, data) 00049 { 00050 static struct etimer timer; 00051 char ch; 00052 unsigned char i, stat; 00053 PROCESS_BEGIN(); 00054 00055 rs232_arch_init(RS232_BAUD_RATE); 00056 etimer_set(&timer, CLOCK_SECOND / 16); 00057 00058 while(1) { 00059 PROCESS_WAIT_EVENT(); 00060 00061 if (etimer_expired(&timer)) { 00062 for (i = 0; i < RS232_BUFSIZE; i++) { 00063 ch = rs232_arch_poll(&stat); 00064 if (stat == 0) { 00065 break; 00066 } 00067 /* We have an input data */ 00068 RS232_CALLBACK(ch); 00069 } 00070 etimer_reset(&timer); 00071 } 00072 } 00073 00074 PROCESS_END(); 00075 } 00076 /*---------------------------------------------------------------------------*/