mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-23 01:29:33 +00:00
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 2005, 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.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* @(#)$Id: serial.c,v 1.2 2006/07/03 11:29:16 nifi Exp $
|
|
*/
|
|
#include "serial.h"
|
|
#include <string.h> /* for memcpy() */
|
|
|
|
|
|
#ifdef SERIAL_CONF_BUFSIZE
|
|
#define BUFSIZE SERIAL_CONF_BUFSIZE
|
|
#else /* SERIAL_CONF_BUFSIZE */
|
|
#define BUFSIZE 40
|
|
#endif /* SERIAL_CONF_BUFSIZE */
|
|
|
|
#define IGNORE_CHAR(c) (c == 0x0d)
|
|
#define END 0x0a
|
|
|
|
static char buffer[BUFSIZE], appbuffer[BUFSIZE];
|
|
static volatile unsigned char bufwptr;
|
|
static volatile char buffer_full = 0;
|
|
|
|
PROCESS(serial_process, "Serial driver");
|
|
|
|
process_event_t serial_event_message;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
serial_input_byte(unsigned char c)
|
|
{
|
|
if(!buffer_full && !IGNORE_CHAR(c)) {
|
|
if(c == END) {
|
|
/* terminate the string */
|
|
buffer[bufwptr++] = '\0';
|
|
buffer_full++;
|
|
process_poll(&serial_process);
|
|
return 1;
|
|
}
|
|
|
|
/* reserve space for the terminating zero character */
|
|
if(bufwptr < (BUFSIZE - 1)) {
|
|
buffer[bufwptr++] = c;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS_THREAD(serial_process, ev, data)
|
|
{
|
|
PROCESS_BEGIN();
|
|
|
|
bufwptr = 0;
|
|
buffer_full = 0;
|
|
|
|
serial_event_message = process_alloc_event();
|
|
|
|
while(1) {
|
|
PROCESS_YIELD();
|
|
|
|
if(buffer_full) {
|
|
memcpy(appbuffer, buffer, bufwptr);
|
|
process_post(PROCESS_BROADCAST, serial_event_message, appbuffer);
|
|
bufwptr = 0;
|
|
buffer_full = 0;
|
|
}
|
|
}
|
|
|
|
PROCESS_END();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
serial_init(void)
|
|
{
|
|
process_start(&serial_process, NULL);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|