110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2007, 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: mac.h,v 1.11 2010/02/03 16:45:12 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* MAC driver header file
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#ifndef __MAC_H__
|
|
#define __MAC_H__
|
|
|
|
#include "contiki-conf.h"
|
|
#include "dev/radio.h"
|
|
|
|
/**
|
|
* The structure of a MAC protocol driver in Contiki.
|
|
*/
|
|
struct mac_driver {
|
|
char *name;
|
|
|
|
/** Initialize the MAC driver */
|
|
const struct mac_driver *(* init)(const struct radio_driver *r);
|
|
|
|
/** Send a packet from the Rime buffer */
|
|
int (* send)(void);
|
|
|
|
/** Read a received packet into the Rime buffer. */
|
|
int (* read)(void);
|
|
|
|
/** Set a function to be called when a packet has been received. */
|
|
void (* set_receive_function)(void (*f)(const struct mac_driver *d));
|
|
|
|
/** Turn the MAC layer on. */
|
|
int (* on)(void);
|
|
|
|
/** Turn the MAC layer off. */
|
|
int (* off)(int keep_radio_on);
|
|
|
|
/** Returns the channel check interval, expressed in clock_time_t ticks. */
|
|
unsigned short (* channel_check_interval)(void);
|
|
};
|
|
|
|
/* Generic MAC return values. */
|
|
enum {
|
|
/**< The MAC layer transmission was OK. */
|
|
MAC_TX_OK,
|
|
|
|
/**< The MAC layer transmission could not be performed due to a
|
|
collision. */
|
|
MAC_TX_COLLISION,
|
|
|
|
/**< The MAC layer did not get an acknowledgement for the packet. */
|
|
MAC_TX_NOACK,
|
|
|
|
/**< The MAC layer transmission could not be performed because of an
|
|
error. The upper layer may try again later. */
|
|
MAC_TX_ERR,
|
|
|
|
/**< The MAC layer transmission could not be performed because of a
|
|
fatal error. The upper layer does not need to try again, as the
|
|
error will be fatal then as well. */
|
|
MAC_TX_ERR_FATAL,
|
|
};
|
|
#ifndef MAC_CHANNEL_CHECK_RATE
|
|
#ifdef MAC_CONF_CHANNEL_CHECK_RATE
|
|
#define MAC_CHANNEL_CHECK_RATE MAC_CONF_CHANNEL_CHECK_RATE
|
|
#else /* MAC_CONF_CHANNEL_CHECK_RATE */
|
|
#define MAC_CHANNEL_CHECK_RATE 4
|
|
#endif /* MAC_CONF_CHANNEL_CHECK_RATE */
|
|
#endif /* MAC_CHANNEL_CHECK_RATE */
|
|
|
|
#if (MAC_CHANNEL_CHECK_RATE & (MAC_CHANNEL_CHECK_RATE - 1)) != 0
|
|
#error MAC_CONF_CHANNEL_CHECK_RATE must be a power of two (i.e., 1, 2, 4, 8, 16, 32, 64, ...).
|
|
#error Change MAC_CONF_CHANNEL_CHECK_RATE in contiki-conf.h or in your Makefile.
|
|
#endif
|
|
|
|
#endif /* __MAC_H__ */
|