116 lines
4.1 KiB
C
116 lines
4.1 KiB
C
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/*
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* Copyright (c) 2014, SICS Swedish ICT.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* Private TSCH definitions
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* (meant for use by TSCH implementation files only)
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* \author
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* Simon Duquennoy <simonduq@sics.se>
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* Beshr Al Nahas <beshr@sics.se>
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*/
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#ifndef __TSCH_PRIVATE_H__
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#define __TSCH_PRIVATE_H__
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/********** Includes **********/
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#include "contiki.h"
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#include "net/linkaddr.h"
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#include "net/mac/tsch/tsch-asn.h"
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#include "net/mac/tsch/tsch-conf.h"
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/************ Types ***********/
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/* TSCH timeslot timing elements. Used to index timeslot timing
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* of different units, such as rtimer tick or micro-second */
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enum tsch_timeslot_timing_elements {
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tsch_ts_cca_offset,
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tsch_ts_cca,
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tsch_ts_tx_offset,
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tsch_ts_rx_offset,
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tsch_ts_rx_ack_delay,
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tsch_ts_tx_ack_delay,
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tsch_ts_rx_wait,
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tsch_ts_ack_wait,
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tsch_ts_rx_tx,
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tsch_ts_max_ack,
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tsch_ts_max_tx,
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tsch_ts_timeslot_length,
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tsch_ts_elements_count, /* Not a timing element */
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};
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/***** External Variables *****/
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/* 802.15.4 broadcast MAC address */
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extern const linkaddr_t tsch_broadcast_address;
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/* The address we use to identify EB queue */
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extern const linkaddr_t tsch_eb_address;
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/* The current Absolute Slot Number (ASN) */
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extern struct asn_t current_asn;
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extern uint8_t tsch_join_priority;
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extern struct tsch_link *current_link;
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/* TSCH channel hopping sequence */
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extern uint8_t tsch_hopping_sequence[TSCH_HOPPING_SEQUENCE_MAX_LEN];
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extern struct asn_divisor_t tsch_hopping_sequence_length;
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/* TSCH timeslot timing (in rtimer ticks) */
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extern rtimer_clock_t tsch_timing[tsch_ts_elements_count];
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/* TSCH processes */
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PROCESS_NAME(tsch_process);
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PROCESS_NAME(tsch_send_eb_process);
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PROCESS_NAME(tsch_pending_events_process);
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/********** Functions *********/
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/* Set TSCH to send a keepalive message after TSCH_KEEPALIVE_TIMEOUT */
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void tsch_schedule_keepalive(void);
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/* Leave the TSCH network */
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void tsch_disassociate(void);
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/************ Macros **********/
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/* Calculate packet tx/rx duration in rtimer ticks based on sent
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* packet len in bytes with 802.15.4 250kbps data rate.
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* One byte = 32us. Add two bytes for CRC and one for len field */
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#define TSCH_PACKET_DURATION(len) US_TO_RTIMERTICKS(32 * ((len) + 3))
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/* Convert rtimer ticks to clock and vice versa */
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#define TSCH_CLOCK_TO_TICKS(c) (((c) * RTIMER_SECOND) / CLOCK_SECOND)
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#define TSCH_CLOCK_TO_SLOTS(c, timeslot_length) (TSCH_CLOCK_TO_TICKS(c) / timeslot_length)
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/* Wait for a condition with timeout t0+offset. */
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#define BUSYWAIT_UNTIL_ABS(cond, t0, offset) \
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while(!(cond) && RTIMER_CLOCK_LT(RTIMER_NOW(), (t0) + (offset))) ;
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#endif /* __TSCH_PRIVATE_H__ */
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