162 lines
7.0 KiB
C
162 lines
7.0 KiB
C
/*
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* Copyright (c) 2015, 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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* \addtogroup tsch
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* @{
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* \file
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* TSCH constants
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* \author
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* Simon Duquennoy <simonduq@sics.se>
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*/
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#ifndef __TSCH_CONST_H__
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#define __TSCH_CONST_H__
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/********** Includes **********/
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#include "net/packetbuf.h"
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#include "net/mac/tsch/tsch-conf.h" /* Required for timestlot timing consts */
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/********** Constants **********/
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/* Link options */
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#define LINK_OPTION_TX 1
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#define LINK_OPTION_RX 2
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#define LINK_OPTION_SHARED 4
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#define LINK_OPTION_TIME_KEEPING 8
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/* Default IEEE 802.15.4e hopping sequences, obtained from https://gist.github.com/twatteyne/2e22ee3c1a802b685695 */
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/* 16 channels, sequence length 16 */
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#define TSCH_HOPPING_SEQUENCE_16_16 (uint8_t[]){ 16, 17, 23, 18, 26, 15, 25, 22, 19, 11, 12, 13, 24, 14, 20, 21 }
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/* 4 channels, sequence length 16 */
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#define TSCH_HOPPING_SEQUENCE_4_16 (uint8_t[]){ 20, 26, 25, 26, 15, 15, 25, 20, 26, 15, 26, 25, 20, 15, 20, 25 }
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/* 4 channels, sequence length 4 */
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#define TSCH_HOPPING_SEQUENCE_4_4 (uint8_t[]){ 15, 25, 26, 20 }
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/* 2 channels, sequence length 2 */
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#define TSCH_HOPPING_SEQUENCE_2_2 (uint8_t[]){ 20, 25 }
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/* 1 channel, sequence length 1 */
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#define TSCH_HOPPING_SEQUENCE_1_1 (uint8_t[]){ 20 }
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/* Max TSCH packet lenght */
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#define TSCH_PACKET_MAX_LEN MIN(127, PACKETBUF_SIZE)
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/* The jitter to remove in ticks.
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* This should be the sum of measurement errors on Tx and Rx nodes.
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* */
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#define TSCH_TIMESYNC_MEASUREMENT_ERROR US_TO_RTIMERTICKS(32)
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/* The approximate number of slots per second */
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#define TSCH_SLOTS_PER_SECOND (1000000 / TSCH_DEFAULT_TS_TIMESLOT_LENGTH)
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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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/* The default timeslot timing in the standard is a guard time of
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* 2200 us, a Tx offset of 2120 us and a Rx offset of 1120 us.
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* As a result, the listening device has a guard time not centered
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* on the expected Tx time. This is to be fixed in the next iteration
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* of the standard. This can be enabled with:
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* #define TSCH_DEFAULT_TS_TX_OFFSET 2120
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* #define TSCH_DEFAULT_TS_RX_OFFSET 1120
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* #define TSCH_DEFAULT_TS_RX_WAIT 2200
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*
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* Instead, we align the Rx guard time on expected Tx time. The Rx
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* guard time is user-configurable with TSCH_CONF_RX_WAIT.
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* (TS_TX_OFFSET - (TS_RX_WAIT / 2)) instead */
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#if TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 10000
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/* Default timeslot timing as per IEEE 802.15.4e */
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#define TSCH_DEFAULT_TS_CCA_OFFSET 1800
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#define TSCH_DEFAULT_TS_CCA 128
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#define TSCH_DEFAULT_TS_TX_OFFSET 2120
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#define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2))
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#define TSCH_DEFAULT_TS_RX_ACK_DELAY 800
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#define TSCH_DEFAULT_TS_TX_ACK_DELAY 1000
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#define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT
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#define TSCH_DEFAULT_TS_ACK_WAIT 400
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#define TSCH_DEFAULT_TS_RX_TX 192
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#define TSCH_DEFAULT_TS_MAX_ACK 2400
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#define TSCH_DEFAULT_TS_MAX_TX 4256
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#define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 10000
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#elif TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 15000
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/* Default timeslot timing for platforms requiring 15ms slots */
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#define TSCH_DEFAULT_TS_CCA_OFFSET 1800
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#define TSCH_DEFAULT_TS_CCA 128
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#define TSCH_DEFAULT_TS_TX_OFFSET 4000
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#define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2))
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#define TSCH_DEFAULT_TS_RX_ACK_DELAY 3600
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#define TSCH_DEFAULT_TS_TX_ACK_DELAY 4000
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#define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT
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#define TSCH_DEFAULT_TS_ACK_WAIT 800
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#define TSCH_DEFAULT_TS_RX_TX 2072
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#define TSCH_DEFAULT_TS_MAX_ACK 2400
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#define TSCH_DEFAULT_TS_MAX_TX 4256
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#define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 15000
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#elif TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 65000U
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/* 65ms timeslot, i.e. nearly the max length allowed by standard (16-bit unsigned in micro-seconds).
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* Useful for running link-layer security on sky in Cooja, where only S/W security is supported.
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* Note: this slot timing would require a total of 120ms. If a slot overlaps with the next active slot,
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* the latter will be skipped.
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* This configuration is mostly a work-around to test link-layer security in Cooja, it is recommended
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* to use it with a 6TiSCH minimal schedule of length >= 2. */
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#define TSCH_DEFAULT_TS_CCA_OFFSET 1800
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#define TSCH_DEFAULT_TS_CCA 128
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#define TSCH_DEFAULT_TS_TX_OFFSET 52000
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#define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2))
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#define TSCH_DEFAULT_TS_RX_ACK_DELAY 58600
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#define TSCH_DEFAULT_TS_TX_ACK_DELAY 59000
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#define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT
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#define TSCH_DEFAULT_TS_ACK_WAIT 800
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#define TSCH_DEFAULT_TS_RX_TX 2072
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#define TSCH_DEFAULT_TS_MAX_ACK 2400
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#define TSCH_DEFAULT_TS_MAX_TX 4256
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#define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 65000
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#else
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#error "TSCH: Unsupported default timeslot length"
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#endif
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#endif /* __TSCH_CONST_H__ */
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/** @} */
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